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Split website out into one file per page. APply new layout and styling
2008-04-24 01:08:31 +08:00
<html>
<body>
<h1>Domain XML format</h1>
Update domain XML docs
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<ul id="toc"></ul>
<p>
This section describes the XML format used to represent domains, there are
variations on the format based on the kind of domains run and the options
used to launch them. For hypervisor specific details consult the
<a href="drivers.html">driver docs</a>
</p>
<h2><a name="elements">Element and attribute overview</a></h2>
<p>
The root element required for all virtual machines is
named <code>domain</code>. It has two attributes, the
<code>type</code> specifies the hypervisor used for running
the domain. The allowed values are driver specific, but
include "xen", "kvm", "qemu", "lxc" and "kqemu". The
second attribute is <code>id</code> which is a unique
integer identifier for the running guest machine. Inactive
machines have no id value.
</p>
<h3><a name="elementsMetadata">General metadata</a></h3>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
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<pre>
&lt;domain type='xen' id='3'&gt;
&lt;name&gt;fv0&lt;/name&gt;
&lt;uuid&gt;4dea22b31d52d8f32516782e98ab3fa0&lt;/uuid&gt;
docs: domain: Document <description> element
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&lt;description&gt;Some human readable description&lt;/description&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
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...</pre>
Update domain XML docs
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<dl>
<dt><code>name</code></dt>
<dd>The content of the <code>name</code> element provides
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a short name for the virtual machine. This name should
consist only of alpha-numeric characters and is required
to be unique within the scope of a single host. It is
often used to form the filename for storing the persistent
configuration file. <span class="since">Since 0.0.1</span></dd>
Update domain XML docs
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<dt><code>uuid</code></dt>
<dd>The content of the <code>uuid</code> element provides
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a globally unique identifier for the virtual machine.
The format must be RFC 4122 compliant, eg <code>3e3fce45-4f53-4fa7-bb32-11f34168b82b</code>.
If omitted when defining/creating a new machine, a random
docs: document <sysinfo> and <smbios> elements * docs/formatdomain.html.in: Talk about <sysinfo> throughout.
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UUID is generated. It is also possible to provide the UUID
via a <a href="#elementsSysinfo"><code>sysinfo</code></a>
specification. <span class="since">Since 0.0.1, sysinfo
since 0.8.7</span></dd>
docs: domain: Document <description> element
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<dt><code>description</code></dt>
<dd>The content of the <code>description</code> element provides a
human readable description of the virtual machine. This data is not
used by libvirt in any way, it can contain any information the user
wants. <span class="since">Since 0.7.2</span></dd>
Update domain XML docs
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</dl>
<h3><a name="elementsOS">Operating system booting</a></h3>
<p>
There are a number of different ways to boot virtual machines
each with their own pros and cons.
</p>
<h4><a name="elementsOSBIOS">BIOS bootloader</a></h4>
<p>
Booting via the BIOS is available for hypervisors supporting
full virtualization. In this case the BIOS has a boot order
priority (floppy, harddisk, cdrom, network) determining where
to obtain/find the boot image.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;os&gt;
&lt;type&gt;hvm&lt;/type&gt;
&lt;loader&gt;/usr/lib/xen/boot/hvmloader&lt;/loader&gt;
&lt;boot dev='hd'/&gt;
qemu: Allow setting boot menu on/off Add a new element to the <os> block: <bootmenu enable="yes|no"/> Which maps to -boot,menu=on|off on the QEMU command line. I decided to use an explicit 'enable' attribute rather than just make the bootmenu element boolean. This allows us to treat lack of a bootmenu element as 'use hypervisor default'.
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&lt;boot dev='cdrom'/&gt;
&lt;bootmenu enable='yes'/&gt;
docs: document <sysinfo> and <smbios> elements * docs/formatdomain.html.in: Talk about <sysinfo> throughout.
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&lt;smbios mode='sysinfo'/&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
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&lt;/os&gt;
...</pre>
Update domain XML docs
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<dl>
<dt><code>type</code></dt>
<dd>The content of the <code>type</code> element specifies the
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type of operating system to be booted in the virtual machine.
<code>hvm</code> indicates that the OS is one designed to run
on bare metal, so requires full virtualization. <code>linux</code>
(badly named!) refers to an OS that supports the Xen 3 hypervisor
guest ABI. There are also two optional attributes, <code>arch</code>
specifying the CPU architecture to virtualization, and <code>machine</code>
referring to the machine type. The <a href="formatcaps.html">Capabilities XML</a>
provides details on allowed values for these. <span class="since">Since 0.0.1</span></dd>
Update domain XML docs
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<dt><code>loader</code></dt>
<dd>The optional <code>loader</code> tag refers to a firmware blob
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used to assist the domain creation process. At this time, it is
only needed by Xen fully virtualized domains. <span class="since">Since 0.1.0</span></dd>
Update domain XML docs
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<dt><code>boot</code></dt>
<dd>The <code>dev</code> attribute takes one of the values "fd", "hd",
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"cdrom" or "network" and is used to specify the next boot device
to consider. The <code>boot</code> element can be repeated multiple
Introduce per-device boot element Currently, boot order can be specified per device class but there is no way to specify exact disk/NIC device to boot from. This patch adds <boot order='N'/> element which can be used inside <disk/> and <interface/>. This is incompatible with the older os/boot element. Since not all hypervisors support per-device boot specification, new deviceboot flag is included in capabilities XML for hypervisors which understand the new boot element. Presence of the flag allows (but doesn't require) users to use the new style boot order specification.
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times to setup a priority list of boot devices to try in turn. The
<code>boot</code> element cannot be used if per-device boot elements
Support booting from hostdev devices
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are used (see <a href="#elementsDisks">disks</a>,
<a href="#elementsNICS">network interfaces</a>, and
<a href="#elementsUSB">USB and PCI devices</a> sections below).
Introduce per-device boot element Currently, boot order can be specified per device class but there is no way to specify exact disk/NIC device to boot from. This patch adds <boot order='N'/> element which can be used inside <disk/> and <interface/>. This is incompatible with the older os/boot element. Since not all hypervisors support per-device boot specification, new deviceboot flag is included in capabilities XML for hypervisors which understand the new boot element. Presence of the flag allows (but doesn't require) users to use the new style boot order specification.
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<span class="since">Since 0.1.3, per-device boot since 0.8.8</span>
Update domain XML docs
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</dd>
qemu: Allow setting boot menu on/off Add a new element to the <os> block: <bootmenu enable="yes|no"/> Which maps to -boot,menu=on|off on the QEMU command line. I decided to use an explicit 'enable' attribute rather than just make the bootmenu element boolean. This allows us to treat lack of a bootmenu element as 'use hypervisor default'.
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<dt><code>bootmenu</code></dt>
<dd> Whether or not to enable an interactive boot menu prompt on guest
startup. The <code>enable</code> attribute can be either "yes" or "no".
If not specified, the hypervisor default is used. <span class="since">
Since 0.8.3</span>
</dd>
docs: document <sysinfo> and <smbios> elements * docs/formatdomain.html.in: Talk about <sysinfo> throughout.
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<dt><code>smbios</code></dt>
<dd>How to populate SMBIOS information visible in the guest.
The <code>mode</code> attribute must be specified, and is either
"emulate" (let the hypervisor generate all values), "host" (copy
all of Block 0 and Block 1, except for the UUID, from the host's
sysinfo: implement the public API * src/libvirt.c (virConnectGetSysinfo): New function. * docs/formatdomain.html.in: Mention it.
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SMBIOS values;
the <a href="html/libvirt-libvirt.html#virConnectGetSysinfo">
<code>virConnectGetSysinfo</code></a> call can be
used to see what values are copied), or "sysinfo" (use the values in
docs: document <sysinfo> and <smbios> elements * docs/formatdomain.html.in: Talk about <sysinfo> throughout.
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the <a href="#elementsSysinfo">sysinfo</a> element). If not
specified, the hypervisor default is used. <span class="since">
Since 0.8.7</span>
</dd>
Update domain XML docs
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</dl>
<h4><a name="elementsOSBootloader">Host bootloader</a></h4>
<p>
Hypervisors employing paravirtualization do not usually emulate
a BIOS, and instead the host is responsible to kicking off the
fix typos in docs docs/formatdomain.html docs/formatdomain.html.in docs/java.html docs/java.html.in
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operating system boot. This may use a pseudo-bootloader in the
Update domain XML docs
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host to provide an interface to choose a kernel for the guest.
An example is <code>pygrub</code> with Xen.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
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<pre>
...
&lt;bootloader&gt;/usr/bin/pygrub&lt;/bootloader&gt;
&lt;bootloader_args&gt;--append single&lt;/bootloader_args&gt;
...</pre>
Update domain XML docs
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<dl>
<dt><code>bootloader</code></dt>
<dd>The content of the <code>bootloader</code> element provides
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a fully qualified path to the bootloader executable in the
host OS. This bootloader will be run to choose which kernel
to boot. The required output of the bootloader is dependent
on the hypervisor in use. <span class="since">Since 0.1.0</span></dd>
Update domain XML docs
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<dt><code>bootloader_args</code></dt>
<dd>The optional <code>bootloader_args</code> element allows
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command line arguments to be passed to the bootloader.
<span class="since">Since 0.2.3</span>
</dd>
Update domain XML docs
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</dl>
<h4><a name="elementsOSKernel">Direct kernel boot</a></h4>
<p>
When installing a new guest OS it is often useful to boot directly
from a kernel and initrd stored in the host OS, allowing command
line arguments to be passed directly to the installer. This capability
is usually available for both para and full virtualized guests.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;os&gt;
&lt;type&gt;hvm&lt;/type&gt;
&lt;loader&gt;/usr/lib/xen/boot/hvmloader&lt;/loader&gt;
&lt;kernel&gt;/root/f8-i386-vmlinuz&lt;/kernel&gt;
&lt;initrd&gt;/root/f8-i386-initrd&lt;/initrd&gt;
&lt;cmdline&gt;console=ttyS0 ks=http://example.com/f8-i386/os/&lt;/cmdline&gt;
&lt;/os&gt;
...</pre>
Update domain XML docs
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<dl>
<dt><code>type</code></dt>
<dd>This element has the same semantics as described earlier in the
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<a href="#elementsOSBIOS">BIOS boot section</a></dd>
"copy-paste" errors * docs/formatdomain.html docs/formatdomain.html.in: Anton Protopopov pointed out a few "copy-paste" errors daniel
2008-05-22 22:57:32 +08:00
<dt><code>loader</code></dt>
Update domain XML docs
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<dd>This element has the same semantics as described earlier in the
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<a href="#elementsOSBIOS">BIOS boot section</a></dd>
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<dt><code>kernel</code></dt>
<dd>The contents of this element specify the fully-qualified path
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to the kernel image in the host OS.</dd>
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<dt><code>initrd</code></dt>
<dd>The contents of this element specify the fully-qualified path
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to the (optional) ramdisk image in the host OS.</dd>
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<dt><code>cmdline</code></dt>
<dd>The contents of this element specify arguments to be passed to
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the kernel (or installer) at boottime. This is often used to
specify an alternate primary console (eg serial port), or the
installation media source / kickstart file</dd>
Update domain XML docs
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</dl>
docs: document <sysinfo> and <smbios> elements * docs/formatdomain.html.in: Talk about <sysinfo> throughout.
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<h3><a name="elementsSysinfo">SMBIOS System Information</a></h3>
<p>
Some hypervisors allow control over what system information is
presented to the guest (for example, SMBIOS fields can be
populated by a hypervisor and inspected via
the <code>dmidecode</code> command in the guest). The
optional <code>sysinfo</code> element covers all such categories
of information. <span class="since">Since 0.8.7</span>
</p>
<pre>
...
&lt;os&gt;
&lt;smbios mode='sysinfo'/&gt;
...
&lt;/os&gt;
&lt;sysinfo type='smbios'&gt;
&lt;bios&gt;
&lt;entry name='vendor'&gt;LENOVO&lt;/entry&gt;
&lt;/bios&gt;
&lt;system&gt;
&lt;entry name='manufacturer'&gt;Fedora&lt;/entry&gt;
&lt;entry name='vendor'&gt;Virt-Manager&lt;/entry&gt;
&lt;/system&gt;
&lt;/sysinfo&gt;
...</pre>
<p>
The <code>sysinfo</code> element has a mandatory
attribute <code>type</code> that determine the layout of
sub-elements, with supported values of:
</p>
<dl>
<dt><code>smbios</code></dt>
<dd>Sub-elements call out specific SMBIOS values, which will
affect the guest if used in conjunction with
the <code>smbios</code> sub-element of
the <a href="#elementsOS"><code>os</code></a> element. Each
sub-element of <code>sysinfo</code> names a SMBIOS block, and
within those elements can be a list of <code>entry</code>
elements that describe a field within the block. The following
blocks and entries are recognized:
<dl>
<dt><code>bios</code></dt>
<dd>
This is block 0 of SMBIOS, with entry names drawn from
"vendor", "version", "date", and "release".
</dd>
<dt><code>system</code></dt>
<dd>
This is block 1 of SMBIOS, with entry names drawn from
"manufacturer", "product", "version", "serial", "uuid",
"sku", and "family". If a "uuid" entry is provided
alongside a
top-level <a href="#elementsMetadata"><code>uuid</code>
element</a>, the two values must match.
</dd>
</dl>
</dd>
</dl>
Update domain XML docs
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<h3><a name="elementsResources">Basic resources</a></h3>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;memory&gt;524288&lt;/memory&gt;
&lt;currentMemory&gt;524288&lt;/currentMemory&gt;
&lt;memoryBacking&gt;
&lt;hugepages/&gt;
&lt;/memoryBacking&gt;
cgroup: Add documentation for blkiotune elements. Add documentation for blkiotune elements. Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
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&lt;blkiotune&gt;
&lt;weight&gt;800&lt;/weight&gt;
&lt;/blkiotune&gt;
Update docs for memory parameters and memtune command * docs/formatdomain.html.in: Add memtune element details, added min_guarantee * src/libvirt.c: Update virDomainGetMemoryParameters api description, make it more clear that the user first needs to call the api to get the number of parameters supported and then call again to get the values. * tools/virsh.pod: Add usage of new command memtune in virsh manpage
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&lt;memtune&gt;
&lt;hard_limit&gt;1048576&lt;/hard_limit&gt;
&lt;soft_limit&gt;131072&lt;/soft_limit&gt;
&lt;swap_hard_limit&gt;2097152&lt;/swap_hard_limit&gt;
&lt;min_guarantee&gt;65536&lt;/min_guarantee&gt;
&lt;/memtune&gt;
vcpu: add current attribute to <vcpu> element Syntax agreed on in https://www.redhat.com/archives/libvir-list/2010-September/msg00476.html <domain ...> <vcpu current='x'>y</vcpu> ... can now be used to specify 1 <= x <= y current vcpus, in relation to the boot-time max of y vcpus. If current is omitted, then current and max are assumed to be the same value. * docs/schemas/domain.rng: Add new attribute. * docs/formatdomain.html.in: Document it. * tests/qemuxml2argvdata/qemuxml2argv-smp.xml: Add to domainschematest. * tests/xml2sexprdata/xml2sexpr-pv-vcpus.xml: Likewise.
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&lt;vcpu cpuset="1-4,^3,6" current="1"&gt;2&lt;/vcpu&gt;
docs: Fix documentation for cputune parameters This re-adds the example section originally written by Osier Yang, and indicates the version in which the cputune parameters became available in libvirt. Signed-off-by: Igor Serebryany <igor47@moomers.org>
2011-05-12 18:48:23 +08:00
&lt;cputune&gt;
docs: Fix error syntax of vcpupin example XML Lacks of "/", push this directly in trivial rule.
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&lt;vcpupin vcpu="0" cpuset="1-4,^2"/&gt;
&lt;vcpupin vcpu="1" cpuset="0,1"/&gt;
&lt;vcpupin vcpu="2" cpuset="2,3"/&gt;
&lt;vcpupin vcpu="3" cpuset="0,4"/&gt;
Correct 'cputune' documentation example. Signed-off-by: Neil Wilson <neil@aldur.co.uk>
2011-06-03 21:43:30 +08:00
&lt;shares&gt;2048&lt;/shares&gt;
docs: Fix documentation for cputune parameters This re-adds the example section originally written by Osier Yang, and indicates the version in which the cputune parameters became available in libvirt. Signed-off-by: Igor Serebryany <igor47@moomers.org>
2011-05-12 18:48:23 +08:00
&lt;/cputune&gt;
numatune: Add doc for new numatune XML
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&lt;numatune&gt;
&lt;memory mode="strict" nodeset="1-4,^3"/&gt;
&lt;/numatune&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<dl>
<dt><code>memory</code></dt>
<dd>The maximum allocation of memory for the guest at boot time.
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The units for this value are kilobytes (i.e. blocks of 1024 bytes)</dd>
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<dt><code>currentMemory</code></dt>
docs: fix trivial typos in currentMemory description
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<dd>The actual allocation of memory for the guest. This value can
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be less than the maximum allocation, to allow for ballooning
up the guests memory on the fly. If this is omitted, it defaults
docs: fix trivial typos in currentMemory description
2011-01-13 05:33:09 +08:00
to the same value as the <code>memory</code> element</dd>
Support configuration of huge pages in guests Add option to domain XML for <memoryBacking> <hugepages/> </memoryBacking> * configure.in: Add check for mntent.h * qemud/libvirtd_qemu.aug, qemud/test_libvirtd_qemu.aug, src/qemu.conf Add 'hugetlbfs_mount' config parameter * src/qemu_conf.c, src/qemu_conf.h: Check for -mem-path flag in QEMU, and pass it when hugepages are requested. Load hugetlbfs_mount config parameter, search for mount if not given. * src/qemu_driver.c: Free hugetlbfs_mount/path parameter in driver shutdown. Create directory for QEMU hugepage usage, chowning if required. * docs/formatdomain.html.in: Document memoryBacking/hugepages elements * docs/schemas/domain.rng: Add memoryBacking/hugepages elements to schema * src/util.c, src/util.h, src/libvirt_private.syms: Add virFileFindMountPoint helper API * tests/qemuhelptest.c: Add -mem-path constants * tests/qemuxml2argvtest.c, tests/qemuxml2xmltest.c: Add tests for hugepage handling * tests/qemuxml2argvdata/qemuxml2argv-hugepages.xml, tests/qemuxml2argvdata/qemuxml2argv-hugepages.args: Data files for hugepage tests
2009-08-25 22:05:18 +08:00
<dt><code>memoryBacking</code></dt>
<dd>The optional <code>memoryBacking</code> element, may have an
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
<code>hugepages</code> element set within it. This tells the
hypervisor that the guest should have its memory allocated using
hugepages instead of the normal native page size.</dd>
cgroup: Add documentation for blkiotune elements. Add documentation for blkiotune elements. Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
2011-02-08 15:02:15 +08:00
<dt><code>blkiotune</code></dt>
<dd> The optional <code>blkiotune</code> element provides the ability
to tune Blkio cgroup tunable parameters for the domain. If this is
omitted, it defaults to the OS provided defaults.</dd>
<dt><code>weight</code></dt>
<dd> The optional <code>weight</code> element is the I/O weight of the
guest. The value should be in range [100, 1000].</dd>
Update docs for memory parameters and memtune command * docs/formatdomain.html.in: Add memtune element details, added min_guarantee * src/libvirt.c: Update virDomainGetMemoryParameters api description, make it more clear that the user first needs to call the api to get the number of parameters supported and then call again to get the values. * tools/virsh.pod: Add usage of new command memtune in virsh manpage
2010-10-19 20:27:12 +08:00
<dt><code>memtune</code></dt>
<dd> The optional <code>memtune</code> element provides details
cgroup: Add documentation for blkiotune elements. Add documentation for blkiotune elements. Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
2011-02-08 15:02:15 +08:00
regarding the memory tunable parameters for the domain. If this is
docs: fix typo * docs/formatdomain.html.in: Fix KVM name.
2011-04-02 06:18:18 +08:00
omitted, it defaults to the OS provided defaults. For QEMU/KVM, the
virsh: Fix documentation for memtune command Commit 78ba748ef14c520ff1c4af2b5b0a44586ac49c8c claims to fix documentation for swap_hard_limit virsh memtune option but it only fixes documentation in formatdomain.html and libvirt.h. This patch completes the task by fixing "virsh help memtune" output and memtune section of virsh man page.
2011-03-31 17:48:17 +08:00
parameters are applied to the QEMU process as a whole. Thus, when
counting them, one needs to add up guest RAM, guest video RAM, and
some memory overhead of QEMU itself. The last piece is hard to
determine so one needs guess and try.</dd>
Update docs for memory parameters and memtune command * docs/formatdomain.html.in: Add memtune element details, added min_guarantee * src/libvirt.c: Update virDomainGetMemoryParameters api description, make it more clear that the user first needs to call the api to get the number of parameters supported and then call again to get the values. * tools/virsh.pod: Add usage of new command memtune in virsh manpage
2010-10-19 20:27:12 +08:00
<dt><code>hard_limit</code></dt>
<dd> The optional <code>hard_limit</code> element is the maximum memory
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
2011-02-05 02:16:35 +08:00
the guest can use. The units for this value are kilobytes (i.e. blocks
of 1024 bytes)</dd>
Update docs for memory parameters and memtune command * docs/formatdomain.html.in: Add memtune element details, added min_guarantee * src/libvirt.c: Update virDomainGetMemoryParameters api description, make it more clear that the user first needs to call the api to get the number of parameters supported and then call again to get the values. * tools/virsh.pod: Add usage of new command memtune in virsh manpage
2010-10-19 20:27:12 +08:00
<dt><code>soft_limit</code></dt>
<dd> The optional <code>soft_limit</code> element is the memory limit to
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
2011-02-05 02:16:35 +08:00
enforce during memory contention. The units for this value are
kilobytes (i.e. blocks of 1024 bytes)</dd>
Update docs for memory parameters and memtune command * docs/formatdomain.html.in: Add memtune element details, added min_guarantee * src/libvirt.c: Update virDomainGetMemoryParameters api description, make it more clear that the user first needs to call the api to get the number of parameters supported and then call again to get the values. * tools/virsh.pod: Add usage of new command memtune in virsh manpage
2010-10-19 20:27:12 +08:00
<dt><code>swap_hard_limit</code></dt>
<dd> The optional <code>swap_hard_limit</code> element is the maximum
virsh: fix memtune's help message for swap_hard_limit * Correct the documentation for cgroup: the swap_hard_limit indicates mem+swap_hard_limit. * Change cgroup private apis to: virCgroupGet/SetMemSwapHardLimit Signed-off-by: Nikunj A. Dadhania <nikunj@linux.vnet.ibm.com>
2011-03-16 13:07:12 +08:00
memory plus swap the guest can use. The units for this value are
kilobytes (i.e. blocks of 1024 bytes). This has to be more than
hard_limit value provided</dd>
Update docs for memory parameters and memtune command * docs/formatdomain.html.in: Add memtune element details, added min_guarantee * src/libvirt.c: Update virDomainGetMemoryParameters api description, make it more clear that the user first needs to call the api to get the number of parameters supported and then call again to get the values. * tools/virsh.pod: Add usage of new command memtune in virsh manpage
2010-10-19 20:27:12 +08:00
<dt><code>min_guarantee</code></dt>
<dd> The optional <code>min_guarantee</code> element is the guaranteed
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
2011-02-05 02:16:35 +08:00
minimum memory allocation for the guest. The units for this value are
kilobytes (i.e. blocks of 1024 bytes)</dd>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<dt><code>vcpu</code></dt>
vcpu: add current attribute to <vcpu> element Syntax agreed on in https://www.redhat.com/archives/libvir-list/2010-September/msg00476.html <domain ...> <vcpu current='x'>y</vcpu> ... can now be used to specify 1 <= x <= y current vcpus, in relation to the boot-time max of y vcpus. If current is omitted, then current and max are assumed to be the same value. * docs/schemas/domain.rng: Add new attribute. * docs/formatdomain.html.in: Document it. * tests/qemuxml2argvdata/qemuxml2argv-smp.xml: Add to domainschematest. * tests/xml2sexprdata/xml2sexpr-pv-vcpus.xml: Likewise.
2010-09-28 07:36:06 +08:00
<dd>The content of this element defines the maximum number of virtual
vcpu: improve cpuset attribute The <vcpu cpuset=...> attribute has been available since commit e193b5dd, but without documentation or RNG validation. * docs/schemas/domain.rng (vcpu): Further validate cpuset. * docs/formatdomain.html.in: Document it. * src/conf/domain_conf.c: Fix typos.
2010-09-28 07:29:13 +08:00
CPUs allocated for the guest OS, which must be between 1 and
the maximum supported by the hypervisor. <span class="since">Since
0.4.4</span>, this element can contain an optional
<code>cpuset</code> attribute, which is a comma-separated
list of physical CPU numbers that virtual CPUs can be pinned
to. Each element in that list is either a single CPU number,
a range of CPU numbers, or a caret followed by a CPU number to
vcpu: add current attribute to <vcpu> element Syntax agreed on in https://www.redhat.com/archives/libvir-list/2010-September/msg00476.html <domain ...> <vcpu current='x'>y</vcpu> ... can now be used to specify 1 <= x <= y current vcpus, in relation to the boot-time max of y vcpus. If current is omitted, then current and max are assumed to be the same value. * docs/schemas/domain.rng: Add new attribute. * docs/formatdomain.html.in: Document it. * tests/qemuxml2argvdata/qemuxml2argv-smp.xml: Add to domainschematest. * tests/xml2sexprdata/xml2sexpr-pv-vcpus.xml: Likewise.
2010-09-28 07:36:06 +08:00
be excluded from a previous range. <span class="since">Since
0.8.5</span>, the optional attribute <code>current</code> can
be used to specify whether fewer than the maximum number of
virtual CPUs should be enabled.
vcpu: improve cpuset attribute The <vcpu cpuset=...> attribute has been available since commit e193b5dd, but without documentation or RNG validation. * docs/schemas/domain.rng (vcpu): Further validate cpuset. * docs/formatdomain.html.in: Document it. * src/conf/domain_conf.c: Fix typos.
2010-09-28 07:29:13 +08:00
</dd>
cputune: Add document for cputune XML v1 - v3: * More clear document for "cpu shares", adopted suggestions from Matthias Bottle and Daniel Veillard.
2011-03-29 21:04:21 +08:00
<dt><code>cputune</code></dt>
docs: Fix documentation for cputune parameters This re-adds the example section originally written by Osier Yang, and indicates the version in which the cputune parameters became available in libvirt. Signed-off-by: Igor Serebryany <igor47@moomers.org>
2011-05-12 18:48:23 +08:00
<dd>
The optional <code>cputune</code> element provides details
regarding the cpu tunable parameters for the domain.
<span class="since">Since 0.9.0</span>
</dd>
cputune: Add document for cputune XML v1 - v3: * More clear document for "cpu shares", adopted suggestions from Matthias Bottle and Daniel Veillard.
2011-03-29 21:04:21 +08:00
<dt><code>vcpupin</code></dt>
docs: Fix documentation for cputune parameters This re-adds the example section originally written by Osier Yang, and indicates the version in which the cputune parameters became available in libvirt. Signed-off-by: Igor Serebryany <igor47@moomers.org>
2011-05-12 18:48:23 +08:00
<dd>
The optional <code>vcpupin</code> element specifies which of host
cputune: Add document for cputune XML v1 - v3: * More clear document for "cpu shares", adopted suggestions from Matthias Bottle and Daniel Veillard.
2011-03-29 21:04:21 +08:00
physical CPUS the domain VCPU will be pinned to. If this is ommited,
each VCPU pinned to all the physical CPUS by default. It contains two
Fix several formatting mistakes in doc
2011-03-31 19:14:03 +08:00
required attributes, the attribute <code>vcpu</code> specifies vcpu id,
cputune: Add document for cputune XML v1 - v3: * More clear document for "cpu shares", adopted suggestions from Matthias Bottle and Daniel Veillard.
2011-03-29 21:04:21 +08:00
and the attribute <code>cpuset</code> is same as attribute <code>cpuset</code>
docs: Fix documentation for cputune parameters This re-adds the example section originally written by Osier Yang, and indicates the version in which the cputune parameters became available in libvirt. Signed-off-by: Igor Serebryany <igor47@moomers.org>
2011-05-12 18:48:23 +08:00
of element <code>vcpu</code>. (NB: Only qemu driver support)
<span class="since">Since 0.9.0</span>
</dd>
cputune: Add document for cputune XML v1 - v3: * More clear document for "cpu shares", adopted suggestions from Matthias Bottle and Daniel Veillard.
2011-03-29 21:04:21 +08:00
<dt><code>shares</code></dt>
docs: Fix documentation for cputune parameters This re-adds the example section originally written by Osier Yang, and indicates the version in which the cputune parameters became available in libvirt. Signed-off-by: Igor Serebryany <igor47@moomers.org>
2011-05-12 18:48:23 +08:00
<dd>
The optional <code>shares</code> element specifies the proportional
cputune: Add document for cputune XML v1 - v3: * More clear document for "cpu shares", adopted suggestions from Matthias Bottle and Daniel Veillard.
2011-03-29 21:04:21 +08:00
weighted share for the domain. If this is ommited, it defaults to
the OS provided defaults. NB, There is no unit for the value, it's a relative
measure based on the setting of other VM, e.g. A VM configured with value
docs: Fix documentation for cputune parameters This re-adds the example section originally written by Osier Yang, and indicates the version in which the cputune parameters became available in libvirt. Signed-off-by: Igor Serebryany <igor47@moomers.org>
2011-05-12 18:48:23 +08:00
2048 will get twice as much CPU time as a VM configured with value 1024.
<span class="since">Since 0.9.0</span>
</dd>
numatune: Add doc for new numatune XML
2011-06-20 15:15:05 +08:00
<dt><code>numatune</code></dt>
<dd>
The optional <code>numatune</code> element provides details of
how to tune the performance of a NUMA host via controlling NUMA policy
for domain process. NB, only supported by QEMU driver.
<span class='since'>Since 0.9.3</span>
<dt><code>memory</code></dt>
<dd>
The optional <code>memory</code> element specify how to allocate memory
for the domain process on a NUMA host. It contains two attributes,
attribute <code>mode</code> is either 'interleave', 'strict', or 'preferred',
attribute <code>nodeset</code> specifies the NUMA nodes, it leads same
syntax with attribute <code>cpuset</code> of element <code>vcpu</code>.
<span class='since'>Since 0.9.3</span>
</dd>
Update domain XML docs
2008-05-08 22:20:07 +08:00
</dl>
Document <cpu> elements in capabilities and domain XML Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2010-01-20 01:22:45 +08:00
<h3><a name="elementsCPU">CPU model and topology</a></h3>
<p>
Requirements for CPU model, its features and topology can be specified
using the following collection of elements.
<span class="since">Since 0.7.5</span>
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;cpu match='exact'&gt;
&lt;model&gt;core2duo&lt;/model&gt;
cpu: Add support for CPU vendor By specifying <vendor> element in CPU requirements a guest can be restricted to run only on CPUs by a given vendor. Host CPU vendor is also specified in capabilities XML. The vendor is checked when migrating a guest but it's not forced, i.e., guests configured without <vendor> element can be freely migrated.
2010-07-02 23:51:59 +08:00
&lt;vendor&gt;Intel&lt;/vendor&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;topology sockets='1' cores='2' threads='1'/&gt;
&lt;feature policy='disable' name='lahf_lm'/&gt;
&lt;/cpu&gt;
...</pre>
Document <cpu> elements in capabilities and domain XML Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2010-01-20 01:22:45 +08:00
<p>
In case no restrictions need to be put on CPU model and its features, a
simpler <code>cpu</code> element can be used.
<span class="since">Since 0.7.6</span>
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;cpu&gt;
&lt;topology sockets='1' cores='2' threads='1'/&gt;
&lt;/cpu&gt;
...</pre>
Document <cpu> elements in capabilities and domain XML Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2010-01-20 01:22:45 +08:00
<dl>
<dt><code>cpu</code></dt>
<dd>The <code>cpu</code> element is the main container for describing
guest CPU requirements. Its <code>match</code> attribute specified how
strictly has the virtual CPU provided to the guest match these
requirements. <span class="since">Since 0.7.6</span> the
<code>match</code> attribute can be omitted if <code>topology</code>
is the only element within <code>cpu</code>. Possible values for the
<code>match</code> attribute are:
<dl>
<dt><code>minimum</code></dt>
<dd>The specified CPU model and features describes the minimum
requested CPU.</dd>
<dt><code>exact</code></dt>
<dd>The virtual CPU provided to the guest will exactly match the
specification</dd>
<dt><code>strict</code></dt>
<dd>The guest will not be created unless the host CPU does exactly
match the specification.</dd>
</dl>
Set sensible defaults for cpu match and feature policy To enable the CPU XML from the capabilities to be pasted directly into the guest XML with no editing, pick a sensible default for match and feature policy. The CPU match will be exact and the feature policy will be require. This should ensure safety for migration and give DWIM semantics for users * src/conf/cpu_conf.c: Default to exact match and require policy * docs/formatdomain.html.in: Document new defaults
2010-09-22 19:47:48 +08:00
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
2011-02-05 02:16:35 +08:00
<span class="since">Since 0.8.5</span> the <code>match</code>
attribute can be omitted and will default to <code>exact</code>.
Document <cpu> elements in capabilities and domain XML Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2010-01-20 01:22:45 +08:00
</dd>
<dt><code>model</code></dt>
<dd>The content of the <code>model</code> element specifies CPU model
requested by the guest. The list of available CPU models and their
definition can be found in <code>cpu_map.xml</code> file installed
in libvirt's data directory.</dd>
cpu: Add support for CPU vendor By specifying <vendor> element in CPU requirements a guest can be restricted to run only on CPUs by a given vendor. Host CPU vendor is also specified in capabilities XML. The vendor is checked when migrating a guest but it's not forced, i.e., guests configured without <vendor> element can be freely migrated.
2010-07-02 23:51:59 +08:00
<dt><code>vendor</code></dt>
<dd><span class="since">Since 0.8.3</span> the content of the
<code>vendor</code> element specifies CPU vendor requested by the
guest. If this element is missing, the guest can be run on a CPU
matching given features regardless on its vendor. The list of
supported vendors can be found in <code>cpu_map.xml</code>.</dd>
Document <cpu> elements in capabilities and domain XML Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2010-01-20 01:22:45 +08:00
<dt><code>topology</code></dt>
<dd>The <code>topology</code> element specifies requested topology of
virtual CPU provided to the guest. Three non-zero values have to be
given for <code>sockets</code>, <code>cores</code>, and
<code>threads</code>: total number of CPU sockets, number of cores per
socket, and number of threads per core, respectively.</dd>
<dt><code>feature</code></dt>
<dd>The <code>cpu</code> element can contain zero or more
<code>elements</code> used to fine-tune features provided by the
selected CPU model. The list of known feature names can be found in
the same file as CPU models. The meaning of each <code>feature</code>
element depends on its <code>policy</code> attribute, which has to be
set to one of the following values:
<dl>
<dt><code>force</code></dt>
<dd>The virtual CPU will claim the feature is supported regardless
of it being supported by host CPU.</dd>
<dt><code>require</code></dt>
<dd>Guest creation will fail unless the feature is supported by host
CPU.</dd>
<dt><code>optional</code></dt>
<dd>The feature will be supported by virtual CPU if and only if it
is supported by host CPU.</dd>
<dt><code>disable</code></dt>
<dd>The feature will not be supported by virtual CPU.</dd>
<dt><code>forbid</code></dt>
<dd>Guest creation will fail if the feature is supported by host
CPU.</dd>
</dl>
Set sensible defaults for cpu match and feature policy To enable the CPU XML from the capabilities to be pasted directly into the guest XML with no editing, pick a sensible default for match and feature policy. The CPU match will be exact and the feature policy will be require. This should ensure safety for migration and give DWIM semantics for users * src/conf/cpu_conf.c: Default to exact match and require policy * docs/formatdomain.html.in: Document new defaults
2010-09-22 19:47:48 +08:00
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
2011-02-05 02:16:35 +08:00
<span class="since">Since 0.8.5</span> the <code>policy</code>
attribute can be omitted and will default to <code>require</code>.
Document <cpu> elements in capabilities and domain XML Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2010-01-20 01:22:45 +08:00
</dd>
</dl>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h3><a name="elementsLifecycle">Lifecycle control</a></h3>
<p>
fix typos in docs docs/formatdomain.html docs/formatdomain.html.in docs/java.html docs/java.html.in
2008-08-08 18:24:14 +08:00
It is sometimes necessary to override the default actions taken
Update domain XML docs
2008-05-08 22:20:07 +08:00
when a guest OS triggers a lifecycle operation. The following
collections of elements allow the actions to be specified. A
common use case is to force a reboot to be treated as a poweroff
when doing the initial OS installation. This allows the VM to be
re-configured for the first post-install bootup.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;on_poweroff&gt;destroy&lt;/on_poweroff&gt;
&lt;on_reboot&gt;restart&lt;/on_reboot&gt;
&lt;on_crash&gt;restart&lt;/on_crash&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<dl>
<dt><code>on_poweroff</code></dt>
<dd>The content of this element specifies the action to take when
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
the guest requests a poweroff.</dd>
"copy-paste" errors * docs/formatdomain.html docs/formatdomain.html.in: Anton Protopopov pointed out a few "copy-paste" errors daniel
2008-05-22 22:57:32 +08:00
<dt><code>on_reboot</code></dt>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<dd>The content of this element specifies the action to take when
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
the guest requests a reboot.</dd>
"copy-paste" errors * docs/formatdomain.html docs/formatdomain.html.in: Anton Protopopov pointed out a few "copy-paste" errors daniel
2008-05-22 22:57:32 +08:00
<dt><code>on_crash</code></dt>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<dd>The content of this element specifies the action to take when
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
the guest crashes.</dd>
Update domain XML docs
2008-05-08 22:20:07 +08:00
</dl>
<p>
Each of these states allow for the same four possible actions.
</p>
<dl>
<dt><code>destroy</code></dt>
<dd>The domain will be terminated completely and all resources
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
released</dd>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<dt><code>restart</code></dt>
<dd>The domain will be terminated, and then restarted with
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the same configuration</dd>
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<dt><code>preserve</code></dt>
<dd>The domain will be terminated, and its resource preserved
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to allow analysis.</dd>
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<dt><code>rename-restart</code></dt>
<dd>The domain will be terminated, and then restarted with
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a new name</dd>
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</dl>
Add actions to virDomainLifecycle enum Xen supports on_crash actions coredump-{destroy,restart}. libvirt cannot parse config returned by xend that contains either of these actions xen52 # xm li -l test | grep on_crash (on_crash coredump-restart) xen52 # virsh dumpxml test error: internal error unknown lifecycle type coredump-restart This patch adds a new virDomainLifecycleCrash enum and appends the new options to existing destroy, restart, preserve, and rename-restart options.
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<p>
on_crash supports these additional
actions <span class="since">since 0.8.4</span>.
</p>
<dl>
<dt><code>coredump-destroy</code></dt>
<dd>The crashed domain's core will be dumped, and then the
domain will be terminated completely and all resources
released</dd>
<dt><code>coredump-restart</code></dt>
<dd>The crashed domain's core will be dumped, and then the
domain will be restarted with the same configuration</dd>
</dl>
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<h3><a name="elementsFeatures">Hypervisor features</a></h3>
<p>
Hypervisors may allow certain CPU / machine features to be
toggled on/off.
</p>
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<pre>
...
&lt;features&gt;
&lt;pae/&gt;
&lt;acpi/&gt;
&lt;apic/&gt;
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&lt;hap/&gt;
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&lt;/features&gt;
...</pre>
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<p>
All features are listed within the <code>features</code>
element, omitting a togglable feature tag turns it off.
The available features can be found by asking
for the <a href="formatcaps.html">capabilities XML</a>,
but a common set for fully virtualized domains are:
</p>
<dl>
<dt><code>pae</code></dt>
<dd>Physical address extension mode allows 32-bit guests
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to address more than 4 GB of memory.</dd>
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<dt><code>acpi</code></dt>
<dd>ACPI is useful for power management, for example, with
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KVM guests it is required for graceful shutdown to work.
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</dd>
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<dt><code>hap</code></dt>
<dd>Enable use of Hardware Assisted Paging if available in
the hardware.
</dd>
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</dl>
<h3><a name="elementsTime">Time keeping</a></h3>
<p>
The guest clock is typically initialized from the host clock.
Most operating systems expect the hardware clock to be kept
in UTC, and this is the default. Windows, however, expects
it to be in so called 'localtime'.
</p>
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<pre>
...
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&lt;clock offset="localtime"&gt;
&lt;timer name="rtc" tickpolicy="catchup" track="guest"&gt;
&lt;catchup threshold=123 slew=120 limit=10000/&gt;
&lt;/timer&gt;
&lt;timer name="pit" tickpolicy="none"/&gt;
&lt;/clock&gt;
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...</pre>
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<dl>
<dt><code>clock</code></dt>
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<dd>
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
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<p>The <code>offset</code> attribute takes four possible
values, allowing fine grained control over how the guest
clock is synchronized to the host. NB, not all hypervisors
support all modes.</p>
<dl>
<dt><code>utc</code></dt>
<dd>
The guest clock will always be synchronized to UTC when
booted</dd>
<dt><code>localtime</code></dt>
<dd>
The guest clock will be synchronized to the host's configured
timezone when booted, if any.
</dd>
<dt><code>timezone</code></dt>
<dd>
The guest clock will be synchronized to the requested timezone
using the <code>timezone</code> attribute.
<span class="since">Since 0.7.7</span>
</dd>
<dt><code>variable</code></dt>
<dd>
The guest clock will have an arbitrary offset applied
relative to UTC. The delta relative to UTC is specified
in seconds, using the <code>adjustment</code> attribute.
The guest is free to adjust the RTC over time an expect
that it will be honoured at next reboot. This is in
contrast to 'utc' mode, where the RTC adjustments are
lost at each reboot. <span class="since">Since 0.7.7</span>
</dd>
</dl>
<p>
A <code>clock</code> may have zero or more
<code>timer</code>sub-elements. <span class="since">Since
0.8.0</span>
</p>
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</dd>
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<dt><code>timer</code></dt>
<dd>
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
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<p>
Each timer element requires a <code>name</code> attribute,
and has other optional attributes that depend on
the <code>name</code> specified. Various hypervisors
support different combinations of attributes.
</p>
<dl>
<dt><code>name</code></dt>
<dd>
The <code>name</code> attribute selects which timer is
being modified, and can be one of "platform", "pit",
"rtc", "hpet", or "tsc".
</dd>
<dt><code>track</code></dt>
<dd>
The <code>track</code> attribute specifies what the timer
tracks, and can be "boot", "guest", or "wall".
Only valid for <code>name="rtc"</code>
or <code>name="platform"</code>.
</dd>
<dt><code>tickpolicy</code></dt>
<dd>
The <code>tickpolicy</code> attribute determines how
missed ticks in the guest are handled, and can be "delay",
"catchup", "merge", or "discard". If the policy is
"catchup", there can be further details in
the <code>catchup</code> sub-element.
<dl>
<dt><code>catchup</code></dt>
<dd>
The <code>catchup</code> element has three optional
attributes, each a positive integer. The attributes
are <code>threshold</code>, <code>slew</code>,
and <code>limit</code>.
</dd>
</dl>
</dd>
<dt><code>frequency</code></dt>
<dd>
The <code>frequency</code> attribute is an unsigned
integer specifying the frequency at
which <code>name="tsc"</code> runs.
</dd>
<dt><code>mode</code></dt>
<dd>
The <code>mode</code> attribute controls how
the <code>name="tsc"</code> timer is managed, and can be
"auto", "native", "emulate", "paravirt", or "smpsafe".
Other timers are always emulated.
</dd>
<dt><code>present</code></dt>
<dd>
The <code>present</code> attribute can be "yes" or "no" to
specify whether a particular timer is available to the guest.
</dd>
</dl>
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</dd>
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</dl>
<h3><a name="elementsDevices">Devices</a></h3>
<p>
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The final set of XML elements are all used to describe devices
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provided to the guest domain. All devices occur as children
of the main <code>devices</code> element.
<span class="since">Since 0.1.3</span>
</p>
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<pre>
...
&lt;devices&gt;
&lt;emulator&gt;/usr/lib/xen/bin/qemu-dm&lt;/emulator&gt;
&lt;/devices&gt;
...</pre>
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<dl>
<dt><code>emulator</code></dt>
<dd>
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The contents of the <code>emulator</code> element specify
the fully qualified path to the device model emulator binary.
The <a href="formatcaps.html">capabilities XML</a> specifies
the recommended default emulator to use for each particular
domain type / architecture combination.
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</dd>
</dl>
<h4><a name="elementsDisks">Hard drives, floppy disks, CDROMs</a></h4>
<p>
Any device that looks like a disk, be it a floppy, harddisk,
cdrom, or paravirtualized driver is specified via the <code>disk</code>
element.
</p>
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<pre>
...
&lt;devices&gt;
&lt;disk type='file'&gt;
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&lt;driver name="tap" type="aio" cache="default"/&gt;
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&lt;source file='/var/lib/xen/images/fv0'/&gt;
&lt;target dev='hda' bus='ide'/&gt;
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&lt;boot order='2'/&gt;
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&lt;encryption type='...'&gt;
...
&lt;/encryption&gt;
&lt;shareable/&gt;
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&lt;serial&gt;
...
&lt;/serial&gt;
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&lt;/disk&gt;
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...
&lt;disk type='network'&gt;
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&lt;driver name="qemu" type="raw" io="threads" ioeventfd="on"/&gt;
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&lt;source protocol="sheepdog" name="image_name"&gt;
&lt;host name="hostname" port="7000"/&gt;
&lt;/source&gt;
&lt;target dev="hdb" bus="ide"/&gt;
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&lt;boot order='1'/&gt;
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&lt;address type='drive' controller='0' bus='1' unit='0'/&gt;
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&lt;/disk&gt;
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&lt;/devices&gt;
...</pre>
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<dl>
<dt><code>disk</code></dt>
<dd>The <code>disk</code> element is the main container for describing
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disks. The <code>type</code> attribute is either "file",
"block", "dir", or "network"
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and refers to the underlying source for the disk. The optional
<code>device</code> attribute indicates how the disk is to be exposed
to the guest OS. Possible values for this attribute are "floppy", "disk"
and "cdrom", defaulting to "disk".
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<span class="since">Since 0.0.3; "device" attribute since 0.1.4;
"network" attribute since 0.8.7</span></dd>
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<dt><code>source</code></dt>
maint: fix grammar errors Jim Meyering recently improved gnulib to catch various grammar errors during 'make syntax-check'. * .gnulib: Update to latest, for syntax-check improvements. * include/libvirt/libvirt.h.in (virConnectAuthCallbackPtr): Use cannot rather than two words. * src/driver.c: Likewise. * src/driver.h (VIR_SECRET_GET_VALUE_INTERNAL_CALL): Likewise. * src/remote/remote_driver.c (initialize_gnutls): Likewise. * src/util/pci.c (pciBindDeviceToStub): Likewise. * src/storage/storage_backend.c (virStorageBackendCreateQemuImg): Likewise. (virStorageBackendUpdateVolTargetInfoFD): Avoid doubled word. * docs/formatdomain.html.in: Likewise. * src/qemu/qemu_process.c (qemuProcessStart): Likewise. * cfg.mk (exclude_file_name_regexp--sc_prohibit_can_not) (exclude_file_name_regexp--sc_prohibit_doubled_word): Exclude existing translation problems.
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<dd>If the disk <code>type</code> is "file", then
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the <code>file</code> attribute specifies the fully-qualified
path to the file holding the disk. If the disk
<code>type</code> is "block", then the <code>dev</code>
attribute specifies the path to the host device to serve as
the disk. If the disk <code>type</code> is "network", then
the <code>protocol</code> attribute specifies the protocol to
access to the requested image; possible values are "nbd",
"rbd", and "sheepdog". If the <code>protocol</code> attribute
is "rbd" or "sheepdog", an additional
attribute <code>name</code> is mandatory to specify which
image to be used. When the disk <code>type</code> is
"network", the <code>source</code> may have zero or
more <code>host</code> sub-elements used to specify the hosts
to connect.
<span class="since">Since 0.0.3</span></dd>
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<dt><code>target</code></dt>
<dd>The <code>target</code> element controls the bus / device under which the
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disk is exposed to the guest OS. The <code>dev</code> attribute indicates
the "logical" device name. The actual device name specified is not guaranteed to map to
the device name in the guest OS. Treat it as a device ordering hint.
The optional <code>bus</code> attribute specifies the type of disk device
to emulate; possible values are driver specific, with typical values being
"ide", "scsi", "virtio", "xen" or "usb". If omitted, the bus type is
inferred from the style of the device name. eg, a device named 'sda'
will typically be exported using a SCSI bus.
<span class="since">Since 0.0.3; <code>bus</code> attribute since 0.4.3;
documentation for USB passthrough * docs/formatdomain.html docs/formatdomain.html.in: documentation for the USB format option by Guido Günther daniel
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"usb" attribute value since after 0.4.4</span></dd>
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<dt><code>driver</code></dt>
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<dd>
The optional driver element allows specifying further details
related to the hypervisor driver used to provide the disk.
docs/formatdomain: Add release info for disk <driver> attributes
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<span class="since">Since 0.1.8</span>
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<ul>
<li>
If the hypervisor supports multiple backend drivers, then
the <code>name</code> attribute selects the primary
backend driver name, while the optional <code>type</code>
attribute provides the sub-type. For example, xen
supports a name of "tap", "tap2", "phy", or "file", with a
type of "aio", while qemu only supports a name of "qemu",
but multiple types including "raw", "bochs", "qcow2", and
"qed".
</li>
<li>
The optional <code>cache</code> attribute controls the
cache mechanism, possible values are "default", "none",
"writethrough" and "writeback".
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<span class="since">Since 0.6.0</span>
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</li>
<li>
The optional <code>error_policy</code> attribute controls
how the hypervisor will behave on an error, possible
values are "stop", "ignore", and "enospace".
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<span class="since">Since 0.8.0</span>
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</li>
<li>
The optional <code>io</code> attribute controls specific
policies on I/O; qemu guests support "threads" and
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"native". <span class="since">Since 0.8.8</span>
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</li>
qemu: domain I/O asynchronous handling For virtio disks and interfaces, qemu allows users to enable or disable ioeventfd feature. This means, qemu can execute domain code, while another thread waits for I/O event. Basically, in some cases it is win, in some loss. This feature is available via 'ioeventfd' attribute in disk and interface <driver> element. It accepts 'on' and 'off'. Leaving this attribute out defaults to hypervisor decision.
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<li>
The optional <code>ioeventfd</code> attribute allows users to
set <a href='https://patchwork.kernel.org/patch/43390/'>
domain I/O asynchronous handling</a> for disk device.
The default is left to the discretion of the hypervisor.
Accepted values are "on" and "off". Enabling this allows
qemu to execute VM while a separate thread handles I/O.
Typically guests experiencing high system CPU utilization
during I/O will benefit from this. On the other hand,
on overloaded host it could increase guest I/O latency.
<span class="since">Since 0.9.3 (QEMU and KVM only)</span>
<b>In general you should leave this option alone, unless you
are very certain you know what you are doing.</b>
</li>
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</ul>
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</dd>
Introduce per-device boot element Currently, boot order can be specified per device class but there is no way to specify exact disk/NIC device to boot from. This patch adds <boot order='N'/> element which can be used inside <disk/> and <interface/>. This is incompatible with the older os/boot element. Since not all hypervisors support per-device boot specification, new deviceboot flag is included in capabilities XML for hypervisors which understand the new boot element. Presence of the flag allows (but doesn't require) users to use the new style boot order specification.
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<dt><code>boot</code></dt>
<dd>Specifies that the disk is bootable. The <code>order</code>
attribute determines the order in which devices will be tried during
boot sequence. The per-device <code>boot</code> elements cannot be
used together with general boot elements in
<a href="#elementsOSBIOS">BIOS bootloader</a> section.
<span class="since">Since 0.8.8</span>
</dd>
Attach encryption information to virDomainDiskDef. The XML allows <encryption format='unencrypted'/>, this implementation canonicalizes the internal representation so that "disk->encryption" is non-NULL iff encryption information is available. A domain with partial encryption information can be defined, completeness of the information is not verified. The domain won't start until the remaining information is added, of course. * docs/formatdomain.html, docs/formatdomain.html.in: Document new encryption options for disks * docs/schemas/domain.rng: Pull in storage encryption schema rules * src/domain_conf.h, src/domain_conf.c: Wire up storage encryption XML parsing/formatting APIs
2009-07-21 13:23:03 +08:00
<dt><code>encryption</code></dt>
<dd>If present, specifies how the volume is encrypted. See
the <a href="formatstorageencryption.html">Storage Encryption</a> page
for more information.
</dd>
add missing doc for device <shareable/> option
2009-12-14 23:20:55 +08:00
<dt><code>shareable</code></dt>
<dd>If present, this indicates the device is expected to be shared
between domains (assuming the hypervisor and OS support this),
which means that caching should be deactivated for that device.
</dd>
Add docs on drive <serial> element * docs/formatdomain.html.in: Document <serial> element within <disk> and fix typo on <driver/> element
2010-05-27 19:44:41 +08:00
<dt><code>serial</code></dt>
<dd>If present, this specify serial number of virtual hard drive.
For example, it may look as <code>&lt;serial&gt;WD-WMAP9A966149&lt;/serial&gt;</code>.
<span class="since">Since 0.7.1</span>
</dd>
update docs for network disks Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
2010-12-24 19:41:47 +08:00
<dt><code>host</code></dt>
<dd>The <code>host</code> element has two attributes "name" and "port",
which specify the hostname and the port number. The meaning of this
element and the number of the elements depend on the protocol attribute.
<table class="top_table">
<tr>
<th> Protocol </th>
<th> Meaning </th>
<th> Number of hosts </th>
</tr>
<tr>
<td> nbd </td>
<td> a server running nbd-server </td>
<td> only one </td>
</tr>
<tr>
<td> rbd </td>
<td> monitor servers of RBD </td>
<td> one or more </td>
</tr>
<tr>
<td> sheepdog </td>
<td> one of the sheepdog servers (default is localhost:7000) </td>
<td> zero or one </td>
</tr>
</table>
</dd>
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
<dt><code>address</code></dt>
<dd>If present, the <code>address</code> element ties the disk
to a given slot of a controller (the
actual <code>&lt;controller&gt;</code> device can often be
inferred by libvirt, although it can
be <a href="#elementsControllers">explicitly specified</a>).
The <code>type</code> attribute is mandatory, and is typically
"pci" or "drive". For a "pci" controller, additional
attributes for <code>bus</code>, <code>slot</code>,
and <code>function</code> must be present, as well as an
optional <code>domain</code>. For a "drive" controller,
additional attributes <code>controller</code>, <code>bus</code>,
and <code>unit</code> are available, each defaulting to 0.
</dd>
Update domain XML docs
2008-05-08 22:20:07 +08:00
</dl>
docs: Document <filesystem> device Tried to dredge through old changelogs and commits to come up with it, so may not be completely accurate. v2: Drop ambiguous 'containers' Use same mail archive for all links
2011-04-30 01:20:28 +08:00
<h4><a name="elementsFilesystems">Filesystems</a></h4>
<p>
A directory on the host that can be accessed directly from the guest.
<span class="since">since 0.3.3, since 0.8.5 for QEMU/KVM</span>
</p>
<pre>
...
&lt;devices&gt;
&lt;filesystem type='template'&gt;
&lt;source name='my-vm-template'/&gt;
&lt;target dir='/'/&gt;
&lt;/filesystem&gt;
docs: <filesystem> attr is 'accessmode', not 'mode'
2011-05-06 02:56:59 +08:00
&lt;filesystem type='mount' accessmode='passthrough'&gt;
docs: Document <filesystem> device Tried to dredge through old changelogs and commits to come up with it, so may not be completely accurate. v2: Drop ambiguous 'containers' Use same mail archive for all links
2011-04-30 01:20:28 +08:00
&lt;source dir='/export/to/guest'/&gt;
&lt;target dir='/import/from/host'/&gt;
&lt;readonly/&gt;
&lt;/filesystem&gt;
...
&lt;/devices&gt;
...</pre>
<dl>
<dt><code>filesystem</code></dt>
<dd>
The filesystem attribute <code>type</code> specifies the type of the
<code>source</code>. The possible values are:
<dl>
<dt><code>type='mount'</code></dt>
<dd>
A host directory to mount in the guest. Used by LXC,
OpenVZ <span class="since">(since 0.6.2)</span>
and QEMU/KVM <span class="since">(since 0.8.5)</span>.
docs: <filesystem> attr is 'accessmode', not 'mode'
2011-05-06 02:56:59 +08:00
This is the default <code>type</code> if one is not specified.
docs: Document <filesystem> device Tried to dredge through old changelogs and commits to come up with it, so may not be completely accurate. v2: Drop ambiguous 'containers' Use same mail archive for all links
2011-04-30 01:20:28 +08:00
</dd>
<dt><code>type='template'</code></dt>
<dd>
OpenVZ filesystem template. Only used by OpenVZ driver.
</dd>
<dt><code>type='file'</code></dt>
<dd>
Currently unused.
</dd>
<dt><code>type='block'</code></dt>
<dd>
Currently unused.
</dd>
</dl>
docs: <filesystem> attr is 'accessmode', not 'mode'
2011-05-06 02:56:59 +08:00
The filesystem block has an optional attribute <code>accessmode</code>
docs: Document <filesystem> device Tried to dredge through old changelogs and commits to come up with it, so may not be completely accurate. v2: Drop ambiguous 'containers' Use same mail archive for all links
2011-04-30 01:20:28 +08:00
which specifies the security mode for accessing the source
<span class="since">(since 0.8.5)</span>. Currently this only works
with <code>type='mount'</code> for the QEMU/KVM driver. The possible
values are:
<dl>
docs: <filesystem> attr is 'accessmode', not 'mode'
2011-05-06 02:56:59 +08:00
<dt><code>accessmode='passthrough'</code></dt>
docs: Document <filesystem> device Tried to dredge through old changelogs and commits to come up with it, so may not be completely accurate. v2: Drop ambiguous 'containers' Use same mail archive for all links
2011-04-30 01:20:28 +08:00
<dd>
The <code>source</code> is accessed with the permissions of the
docs: <filesystem> attr is 'accessmode', not 'mode'
2011-05-06 02:56:59 +08:00
user inside the guest. This is the default <code>accessmode</code> if
docs: Document <filesystem> device Tried to dredge through old changelogs and commits to come up with it, so may not be completely accurate. v2: Drop ambiguous 'containers' Use same mail archive for all links
2011-04-30 01:20:28 +08:00
one is not specified.
<a href="http://lists.gnu.org/archive/html/qemu-devel/2010-05/msg02673.html">More info</a>
</dd>
docs: <filesystem> attr is 'accessmode', not 'mode'
2011-05-06 02:56:59 +08:00
<dt><code>accessmode='mapped'</code></dt>
docs: Document <filesystem> device Tried to dredge through old changelogs and commits to come up with it, so may not be completely accurate. v2: Drop ambiguous 'containers' Use same mail archive for all links
2011-04-30 01:20:28 +08:00
<dd>
The <code>source</code> is accessed with the permissions of the
hypervisor (QEMU process).
<a href="http://lists.gnu.org/archive/html/qemu-devel/2010-05/msg02673.html">More info</a>
</dd>
docs: <filesystem> attr is 'accessmode', not 'mode'
2011-05-06 02:56:59 +08:00
<dt><code>accessmode='squash'</code></dt>
docs: Document <filesystem> device Tried to dredge through old changelogs and commits to come up with it, so may not be completely accurate. v2: Drop ambiguous 'containers' Use same mail archive for all links
2011-04-30 01:20:28 +08:00
<dd>
Similar to 'passthrough', the exception is that failure of
privileged operations like 'chown' are ignored. This makes a
passthrough-like mode usable for people who run the hypervisor
as non-root.
<a href="http://lists.gnu.org/archive/html/qemu-devel/2010-09/msg00121.html">More info</a>
</dd>
</dl>
</dd>
<dt><code>source</code></dt>
<dd>
The resource on the host that is being accessed in the guest. The
<code>name</code> attribute must be used with
<code>type='template'</code>, and the <code>dir</code> attribute must
be used with <code>type='mount'</code>
</dd>
<dt><code>target</code></dt>
<dd>
Where the <code>source</code> can be accessed in the guest. For
most drivers this is an automatic mount point, but for QEMU/KVM
this is merely an arbitrary string tag that is exported to the
guest as a hint for where to mount.
</dd>
<dt><code>readonly</code></dt>
<dd>
An optional <code>readonly</code> attribute is available but currently
unused.
</dd>
</dl>
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
<h4><a name="elementsControllers">Controllers</a></h4>
<p>
Many devices that have an <code>&lt;address&gt;</code>
sub-element are designed to work with a controller to manage
related devices. Normally, libvirt can automatically infer such
controllers without requiring explicit XML markup, but sometimes
it is necessary to provide an explicit controller element.
</p>
<pre>
...
&lt;devices&gt;
&lt;controller type='ide' index='0'/&gt;
&lt;controller type='virtio-serial' index='0' ports='16' vectors='4'/&gt;
&lt;controller type='virtio-serial' index='1'&gt;
&lt;address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/&gt;
&lt;/controller&gt;
...
&lt;/devices&gt;
...</pre>
<p>
Each controller has a mandatory attribute <code>type</code>,
smartcard: add XML support for <smartcard> device Assuming a hypervisor that supports multiple smartcard devices in the guest, this would be a valid XML description: <devices> <smartcard mode='host'/> <smartcard mode='host-certificates'> <certificate>/path/to/cert1</certificate> <certificate>/path/to/cert2</certificate> <certificate>/path/to/cert3</certificate> </smartcard> <smartcard mode='passthrough' type='tcp'> <source mode='bind' host='127.0.0.1' service='2001'/> <protocol type='raw'/> </smartcard> </devices> (As of this commit, the qemu hypervisor will be the first implementation, but it only supports one smartcard.) * docs/formatdomain.html.in (Smartcard devices): New section. * docs/schemas/domain.rng (smartcard): New define, used in devices. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-host.xml: New file to test schema. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-host-certificates.xml: Likewise. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-tcp.xml: Likewise. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-controller.xml: Likewise.
2011-01-06 09:02:20 +08:00
which must be one of "ide", "fdc", "scsi", "sata", "ccid", or
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
"virtio-serial", and a mandatory attribute <code>index</code>
which is the decimal integer describing in which order the bus
controller is encountered (for use in <code>controller</code>
attributes of <code>&lt;address&gt;</code> elements). The
"virtio-serial" controller has two additional optional
attributes <code>ports</code> and <code>vectors</code>, which
control how many devices can be connected through the
controller. A "scsi" controller has an optional
attribute <code>model</code>, which is one of "auto",
"buslogic", "lsilogic", "lsias1068", or "vmpvscsi".
</p>
<p>
For controllers that are themselves devices on a PCI or USB bus,
an optional sub-element <code>&lt;address&gt;</code> can specify
the exact relationship of the controller to its master bus, with
semantics like any other device's <code>address</code>
sub-element.
</p>
Support leases in guest XML and lock manager A lock manager may operate in various modes. The direct mode of operation is to obtain locks based on the resources associated with devices in the XML. The indirect mode is where the app creating the domain provides explicit leases for each resource that needs to be locked. This XML extension allows for listing resources in the XML <devices> ... <lease> <lockspace>somearea</lockspace> <key>thequickbrownfoxjumpsoverthelazydog</key> <target path='/some/lease/path' offset='23432'/> </lease> ... </devices> The 'lockspace' is a unique identifier for the lockspace which the lease is associated The 'key' is a unique identifier for the resource associated with the lease. The 'target' is the file on disk where the leases are held. * docs/schemas/domain.rng: Add lease schema * src/conf/domain_conf.c, src/conf/domain_conf.h: parsing and formatting for leases * tests/qemuxml2argvdata/qemuxml2argv-lease.args, tests/qemuxml2argvdata/qemuxml2argv-lease.xml, tests/qemuxml2xmltest.c: Test XML handling for leases
2010-12-10 02:25:11 +08:00
<h4><a name="elementsLease">Device leases</a></h4>
<p>
When using a lock manager, it may be desirable to record device leases
against a VM. The lock manager will ensure the VM won't start unless
the leases can be acquired.
</p>
<pre>
...
&lt;devices&gt;
...
&lt;lease&gt;
&lt;lockspace&gt;somearea&lt;/lockspace&gt;
&lt;key&gt;somekey&lt;/key&gt;
&lt;target path='/some/lease/path' offset='1024'/&gt;
&lt;/lease&gt;
...
&lt;/devices&gt;
...</pre>
<dl>
<dt>lockspace</dt>
<dd>This is an arbitrary string, identifying the lockspace
within which the key is held. Lock managers may impose
extra restrictions on the format, or length of the lockspace
name.</dd>
<dt>key</dt>
<dd>This is an arbitrary string, uniquely identifying the
lease to be acquired. Lock managers may impose extra
restrictions on the format, or length of the key.
</dd>
<dt>target</dt>
<dd>This is the fully qualified path of the file associated
with the lockspace. The offset specifies where the lease
is stored within the file. If the lock manager does not
require a offset, just pass 0.
</dd>
</dl>
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
Add tests and docs for the new PCI passthrough format * docs/formatdomain.html.in docs/libvirt.rng docs/formatdomain.html: document the new PCI passthrough format * tests/qemuxml2argvtest.c tests/qemuxml2xmltest.c tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.args tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.xml: and add a regression test for it. Daniel
2009-01-12 23:09:19 +08:00
<h4><a name="elementsUSB">USB and PCI devices</a></h4>
documentation for USB passthrough * docs/formatdomain.html docs/formatdomain.html.in: documentation for the USB format option by Guido Günther daniel
2008-08-12 15:28:28 +08:00
<p>
Add tests and docs for the new PCI passthrough format * docs/formatdomain.html.in docs/libvirt.rng docs/formatdomain.html: document the new PCI passthrough format * tests/qemuxml2argvtest.c tests/qemuxml2xmltest.c tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.args tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.xml: and add a regression test for it. Daniel
2009-01-12 23:09:19 +08:00
USB and PCI devices attached to the host can be passed through to the guest using
the <code>hostdev</code> element. <span class="since">since after
0.4.4 for USB and 0.6.0 for PCI (KVM only)</span>:
documentation for USB passthrough * docs/formatdomain.html docs/formatdomain.html.in: documentation for the USB format option by Guido Günther daniel
2008-08-12 15:28:28 +08:00
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;hostdev mode='subsystem' type='usb'&gt;
&lt;source&gt;
&lt;vendor id='0x1234'/&gt;
&lt;product id='0xbeef'/&gt;
&lt;/source&gt;
Support booting from hostdev devices
2011-02-03 20:06:21 +08:00
&lt;boot order='2'/&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;/hostdev&gt;
&lt;/devices&gt;
...</pre>
Add tests and docs for the new PCI passthrough format * docs/formatdomain.html.in docs/libvirt.rng docs/formatdomain.html: document the new PCI passthrough format * tests/qemuxml2argvtest.c tests/qemuxml2xmltest.c tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.args tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.xml: and add a regression test for it. Daniel
2009-01-12 23:09:19 +08:00
<p>or:</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
domain.rng vs. formatdomain.html#elementsUSB The Relax-NG schema for domains regarding <hostdev> doesn't match what's implemented in src/conf/domain_conf.c#virDomainHostdevDefFormat(): The implementation only requires @type, but the schema currently either required none or all three attributes (@mode, @type, and @managed) to be defined together, because they are declared in the same <optional)-section. (@managed is currently even undocumented on <http://libvirt.org/formatdomain.html#elementsUSB>). Thus the following minimal <hostdev>-example fails to validate: <domain type='test'> <name>N</name> <memory>4096</memory> <bootloader>/bin/false</bootloader> <os> <type arch='x86_64' machine='xenpv'>linux</type> </os> <devices> <hostdev type='pci'> <source> <address bus='0x06' slot='0x00' function='0x0'/> </source> </hostdev> </devices> </domain> The schema is changed to match the current implementation: 1. @mode is optional (which defaults to 'subsystem') 2. @type is required 3. @managed is optional (which defaults to 'no') The documentation is updated to mention @managed. Signed-off-by: Philipp Hahn <hahn@univention.de>
2011-03-01 18:23:20 +08:00
&lt;hostdev mode='subsystem' type='pci' managed='yes'&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;source&gt;
&lt;address bus='0x06' slot='0x02' function='0x0'/&gt;
&lt;/source&gt;
Support booting from hostdev devices
2011-02-03 20:06:21 +08:00
&lt;boot order='1'/&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;/hostdev&gt;
&lt;/devices&gt;
...</pre>
documentation for USB passthrough * docs/formatdomain.html docs/formatdomain.html.in: documentation for the USB format option by Guido Günther daniel
2008-08-12 15:28:28 +08:00
<dl>
<dt><code>hostdev</code></dt>
<dd>The <code>hostdev</code> element is the main container for describing
domain.rng vs. formatdomain.html#elementsUSB The Relax-NG schema for domains regarding <hostdev> doesn't match what's implemented in src/conf/domain_conf.c#virDomainHostdevDefFormat(): The implementation only requires @type, but the schema currently either required none or all three attributes (@mode, @type, and @managed) to be defined together, because they are declared in the same <optional)-section. (@managed is currently even undocumented on <http://libvirt.org/formatdomain.html#elementsUSB>). Thus the following minimal <hostdev>-example fails to validate: <domain type='test'> <name>N</name> <memory>4096</memory> <bootloader>/bin/false</bootloader> <os> <type arch='x86_64' machine='xenpv'>linux</type> </os> <devices> <hostdev type='pci'> <source> <address bus='0x06' slot='0x00' function='0x0'/> </source> </hostdev> </devices> </domain> The schema is changed to match the current implementation: 1. @mode is optional (which defaults to 'subsystem') 2. @type is required 3. @managed is optional (which defaults to 'no') The documentation is updated to mention @managed. Signed-off-by: Philipp Hahn <hahn@univention.de>
2011-03-01 18:23:20 +08:00
host devices. For usb device passthrough <code>mode</code> is always
"subsystem" and <code>type</code> is "usb" for a USB device and "pci"
docs/formatdomain.html.in: Fix spelling PIC->PCI Not "Programmable Interrupt Controller" but "Peripheral Component Interconnect". Signed-off-by: Philipp Hahn <hahn@univention.de>
2011-03-14 15:52:14 +08:00
for a PCI device. When <code>managed</code> is "yes" for a PCI
domain.rng vs. formatdomain.html#elementsUSB The Relax-NG schema for domains regarding <hostdev> doesn't match what's implemented in src/conf/domain_conf.c#virDomainHostdevDefFormat(): The implementation only requires @type, but the schema currently either required none or all three attributes (@mode, @type, and @managed) to be defined together, because they are declared in the same <optional)-section. (@managed is currently even undocumented on <http://libvirt.org/formatdomain.html#elementsUSB>). Thus the following minimal <hostdev>-example fails to validate: <domain type='test'> <name>N</name> <memory>4096</memory> <bootloader>/bin/false</bootloader> <os> <type arch='x86_64' machine='xenpv'>linux</type> </os> <devices> <hostdev type='pci'> <source> <address bus='0x06' slot='0x00' function='0x0'/> </source> </hostdev> </devices> </domain> The schema is changed to match the current implementation: 1. @mode is optional (which defaults to 'subsystem') 2. @type is required 3. @managed is optional (which defaults to 'no') The documentation is updated to mention @managed. Signed-off-by: Philipp Hahn <hahn@univention.de>
2011-03-01 18:23:20 +08:00
device, it is detached from the host before being passed on to
the guest.</dd>
documentation for USB passthrough * docs/formatdomain.html docs/formatdomain.html.in: documentation for the USB format option by Guido Günther daniel
2008-08-12 15:28:28 +08:00
<dt><code>source</code></dt>
<dd>The source element describes the device as seen from the host.
The USB device can either be addressed by vendor / product id using the
<code>vendor</code> and <code>product</code> elements or by the device's
Add tests and docs for the new PCI passthrough format * docs/formatdomain.html.in docs/libvirt.rng docs/formatdomain.html: document the new PCI passthrough format * tests/qemuxml2argvtest.c tests/qemuxml2xmltest.c tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.args tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.xml: and add a regression test for it. Daniel
2009-01-12 23:09:19 +08:00
address on the hosts using the <code>address</code> element.
PCI devices on the other hand can only be described by their
<code>address</code></dd>
documentation for USB passthrough * docs/formatdomain.html docs/formatdomain.html.in: documentation for the USB format option by Guido Günther daniel
2008-08-12 15:28:28 +08:00
<dt><code>vendor</code>, <code>product</code></dt>
<dd>The <code>vendor</code> and <code>product</code> elements each have an
<code>id</code> attribute that specifies the USB vendor and product id.
The ids can be given in decimal, hexadecimal (starting with 0x) or
octal (starting with 0) form.</dd>
Support booting from hostdev devices
2011-02-03 20:06:21 +08:00
<dt><code>boot</code></dt>
<dd>Specifies that the device is bootable. The <code>order</code>
attribute determines the order in which devices will be tried during
boot sequence. The per-device <code>boot</code> elements cannot be
used together with general boot elements in
<a href="#elementsOSBIOS">BIOS bootloader</a> section.
<span class="since">Since 0.8.8</span></dd>
documentation for USB passthrough * docs/formatdomain.html docs/formatdomain.html.in: documentation for the USB format option by Guido Günther daniel
2008-08-12 15:28:28 +08:00
<dt><code>address</code></dt>
Add tests and docs for the new PCI passthrough format * docs/formatdomain.html.in docs/libvirt.rng docs/formatdomain.html: document the new PCI passthrough format * tests/qemuxml2argvtest.c tests/qemuxml2xmltest.c tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.args tests/qemuxml2argvdata/qemuxml2argv-hostdev-pci-address.xml: and add a regression test for it. Daniel
2009-01-12 23:09:19 +08:00
<dd>The <code>address</code> element for USB devices has a
<code>bus</code> and <code>device</code> attribute to specify the
USB bus and device number the device appears at on the host.
The values of these attributes can be given in decimal, hexadecimal
(starting with 0x) or octal (starting with 0) form.
For PCI devices the element carries 3 attributes allowing to designate
the device as can be found with the <code>lspci</code> or
with <code>virsh nodedev-list</code>. The
<code>bus</code> attribute allows the hexadecimal values 0 to ff, the
<code>slot</code> attribute allows the hexadecimal values 0 to 1f, and
the <code>function</code> attribute allows the hexadecimal values 0 to
7. There is also an optional <code>domain</code> attribute for the
PCI domain, with hexadecimal values 0 to ffff, but it is currently
not used by qemu.</dd>
documentation for USB passthrough * docs/formatdomain.html docs/formatdomain.html.in: documentation for the USB format option by Guido Günther daniel
2008-08-12 15:28:28 +08:00
</dl>
smartcard: add XML support for <smartcard> device Assuming a hypervisor that supports multiple smartcard devices in the guest, this would be a valid XML description: <devices> <smartcard mode='host'/> <smartcard mode='host-certificates'> <certificate>/path/to/cert1</certificate> <certificate>/path/to/cert2</certificate> <certificate>/path/to/cert3</certificate> </smartcard> <smartcard mode='passthrough' type='tcp'> <source mode='bind' host='127.0.0.1' service='2001'/> <protocol type='raw'/> </smartcard> </devices> (As of this commit, the qemu hypervisor will be the first implementation, but it only supports one smartcard.) * docs/formatdomain.html.in (Smartcard devices): New section. * docs/schemas/domain.rng (smartcard): New define, used in devices. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-host.xml: New file to test schema. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-host-certificates.xml: Likewise. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-tcp.xml: Likewise. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-controller.xml: Likewise.
2011-01-06 09:02:20 +08:00
<h4><a name="elementsSmartcard">Smartcard devices</a></h4>
<p>
A virtual smartcard device can be supplied to the guest via the
<code>smartcard</code> element. A USB smartcard reader device on
the host cannot be used on a guest with simple device
passthrough, since it will then not be available on the host,
possibly locking the host computer when it is "removed".
Therefore, some hypervisors provide a specialized virtual device
that can present a smartcard interface to the guest, with
several modes for describing how credentials are obtained from
the host or even a from a channel created to a third-party
smartcard provider. <span class="since">Since 0.8.8</span>
</p>
<pre>
...
&lt;devices&gt;
&lt;smartcard mode='host'/&gt;
&lt;smartcard mode='host-certificates'&gt;
&lt;certificate&gt;cert1&lt;/certificate&gt;
&lt;certificate&gt;cert2&lt;/certificate&gt;
&lt;certificate&gt;cert3&lt;/certificate&gt;
&lt;database&gt;/etc/pki/nssdb/&lt;/database&gt;
&lt;/smartcard&gt;
&lt;smartcard mode='passthrough' type='tcp'&gt;
&lt;source mode='bind' host='127.0.0.1' service='2001'/&gt;
&lt;protocol type='raw'/&gt;
&lt;address type='ccid' controller='0' slot='0'/&gt;
&lt;/smartcard&gt;
smartcard: add spicevmc support Adds <smartcard mode='passthrough' type='spicevmc'/>, which uses the new <channel name='smartcard'/> of <graphics type='spice'>. * docs/schemas/domain.rng: Support new XML. * docs/formatdomain.html.in: Document it. * src/conf/domain_conf.h (virDomainGraphicsSpiceChannelName): New enum value. (virDomainChrSpicevmcName): New enum. (virDomainChrSourceDef): Distinguish spicevmc types. * src/conf/domain_conf.c (virDomainGraphicsSpiceChannelName): Add smartcard. (virDomainSmartcardDefParseXML): Parse it. (virDomainChrDefParseXML, virDomainSmartcardDefParseXML): Set spicevmc name. (virDomainChrSpicevmc): New enum conversion functions. * src/libvirt_private.syms: Export new functions. * src/qemu/qemu_command.c (qemuBuildChrChardevStr): Conditionalize name. * tests/qemuxml2argvtest.c (domain): New test. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-spicevmc.args: New file. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-spicevmc.xml: Likewise.
2011-02-04 10:23:31 +08:00
&lt;smartcard mode='passthrough' type='spicevmc'/&gt;
smartcard: add XML support for <smartcard> device Assuming a hypervisor that supports multiple smartcard devices in the guest, this would be a valid XML description: <devices> <smartcard mode='host'/> <smartcard mode='host-certificates'> <certificate>/path/to/cert1</certificate> <certificate>/path/to/cert2</certificate> <certificate>/path/to/cert3</certificate> </smartcard> <smartcard mode='passthrough' type='tcp'> <source mode='bind' host='127.0.0.1' service='2001'/> <protocol type='raw'/> </smartcard> </devices> (As of this commit, the qemu hypervisor will be the first implementation, but it only supports one smartcard.) * docs/formatdomain.html.in (Smartcard devices): New section. * docs/schemas/domain.rng (smartcard): New define, used in devices. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-host.xml: New file to test schema. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-host-certificates.xml: Likewise. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-tcp.xml: Likewise. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-controller.xml: Likewise.
2011-01-06 09:02:20 +08:00
&lt;/devices&gt;
...
</pre>
<p>
The <code>&lt;smartcard&gt;</code> element has a mandatory
attribute <code>mode</code>. The following modes are supported;
in each mode, the guest sees a device on its USB bus that
behaves like a physical USB CCID (Chip/Smart Card Interface
Device) card.
</p>
<dl>
<dt><code>mode='host'</code></dt>
<dd>The simplest operation, where the hypervisor relays all
requests from the guest into direct access to the host's
smartcard via NSS. No other attributes or sub-elements are
required. See below about the use of an
optional <code>&lt;address&gt;</code> sub-element.</dd>
<dt><code>mode='host-certificates'</code></dt>
<dd>Rather than requiring a smartcard to be plugged into the
host, it is possible to provide three NSS certificate names
residing in a database on the host. These certificates can be
generated via the command <code>certutil -d /etc/pki/nssdb -x -t
CT,CT,CT -S -s CN=cert1 -n cert1</code>, and the resulting three
certificate names must be supplied as the content of each of
three <code>&lt;certificate&gt;</code> sub-elements. An
additional sub-element <code>&lt;database&gt;</code> can specify
the absolute path to an alternate directory (matching
the <code>-d</code> option of the <code>certutil</code> command
when creating the certificates); if not present, it defaults to
/etc/pki/nssdb.</dd>
<dt><code>mode='passthrough'</code></dt>
<dd>Rather than having the hypervisor directly communicate with
the host, it is possible to tunnel all requests through a
secondary character device to a third-party provider (which may
in turn be talking to a smartcard or using three certificate
files). In this mode of operation, an additional
attribute <code>type</code> is required, matching one of the
supported <a href="#elementsConsole">serial device</a> types, to
smartcard: add spicevmc support Adds <smartcard mode='passthrough' type='spicevmc'/>, which uses the new <channel name='smartcard'/> of <graphics type='spice'>. * docs/schemas/domain.rng: Support new XML. * docs/formatdomain.html.in: Document it. * src/conf/domain_conf.h (virDomainGraphicsSpiceChannelName): New enum value. (virDomainChrSpicevmcName): New enum. (virDomainChrSourceDef): Distinguish spicevmc types. * src/conf/domain_conf.c (virDomainGraphicsSpiceChannelName): Add smartcard. (virDomainSmartcardDefParseXML): Parse it. (virDomainChrDefParseXML, virDomainSmartcardDefParseXML): Set spicevmc name. (virDomainChrSpicevmc): New enum conversion functions. * src/libvirt_private.syms: Export new functions. * src/qemu/qemu_command.c (qemuBuildChrChardevStr): Conditionalize name. * tests/qemuxml2argvtest.c (domain): New test. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-spicevmc.args: New file. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-spicevmc.xml: Likewise.
2011-02-04 10:23:31 +08:00
describe the host side of the tunnel; <code>type='tcp'</code>
or <code>type='spicevmc'</code> (which uses the smartcard
channel of a <a href="#elementsGraphics">SPICE graphics
device</a>) are typical. Further sub-elements, such
as <code>&lt;source&gt;</code>, may be required according to the
smartcard: add XML support for <smartcard> device Assuming a hypervisor that supports multiple smartcard devices in the guest, this would be a valid XML description: <devices> <smartcard mode='host'/> <smartcard mode='host-certificates'> <certificate>/path/to/cert1</certificate> <certificate>/path/to/cert2</certificate> <certificate>/path/to/cert3</certificate> </smartcard> <smartcard mode='passthrough' type='tcp'> <source mode='bind' host='127.0.0.1' service='2001'/> <protocol type='raw'/> </smartcard> </devices> (As of this commit, the qemu hypervisor will be the first implementation, but it only supports one smartcard.) * docs/formatdomain.html.in (Smartcard devices): New section. * docs/schemas/domain.rng (smartcard): New define, used in devices. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-host.xml: New file to test schema. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-host-certificates.xml: Likewise. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-tcp.xml: Likewise. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-controller.xml: Likewise.
2011-01-06 09:02:20 +08:00
given type, although a <code>&lt;target&gt;</code> sub-element
is not required (since the consumer of the character device is
the hypervisor itself, rather than a device visible in the
guest).</dd>
</dl>
<p>
Each mode supports an optional
sub-element <code>&lt;address&gt;</code>, which fine-tunes the
correlation between the smartcard and a ccid bus controller.
If present, the element must have an attribute
of <code>type='ccid'</code> as well as a <code>bus</code>
attribute listing the index of the bus that the smartcard
utilizes. An optional <code>slot</code> attribute lists which
slot within the bus. For now, qemu only supports at most one
smartcard, with an address of bus=0 slot=0.
</p>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h4><a name="elementsNICS">Network interfaces</a></h4>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='bridge'&gt;
&lt;source bridge='xenbr0'/&gt;
&lt;mac address='00:16:3e:5d:c7:9e'/&gt;
&lt;script path='vif-bridge'/&gt;
Introduce per-device boot element Currently, boot order can be specified per device class but there is no way to specify exact disk/NIC device to boot from. This patch adds <boot order='N'/> element which can be used inside <disk/> and <interface/>. This is incompatible with the older os/boot element. Since not all hypervisors support per-device boot specification, new deviceboot flag is included in capabilities XML for hypervisors which understand the new boot element. Presence of the flag allows (but doesn't require) users to use the new style boot order specification.
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&lt;boot order='1'/&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
<p>
There are several possibilities for specifying a network
interface visible to the guest. Each subsection below provides
more details about common setup options. Additionally,
each <code>&lt;interface&gt;</code> element has an
optional <code>&lt;address&gt;</code> sub-element that can tie
the interface to a particular pci slot, with
attribute <code>type='pci'</code> and additional
attributes <code>domain</code>, <code>bus</code>, <code>slot</code>,
and <code>function</code> as appropriate.
</p>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h5><a name="elementsNICSVirtual">Virtual network</a></h5>
<p>
<strong><em>
This is the recommended config for general guest connectivity on
hosts with dynamic / wireless networking configs
</em></strong>
</p>
<p>
Provides a virtual network using a bridge device in the host.
Depending on the virtual network configuration, the network may be
totally isolated, NAT'ing to an explicit network device, or NAT'ing to
the default route. DHCP and DNS are provided on the virtual network in
all cases and the IP range can be determined by examining the virtual
network config with '<code>virsh net-dumpxml [networkname]</code>'.
There is one virtual network called 'default' setup out
of the box which does NAT'ing to the default route and has an IP range of
docs: correct range of default NAT subnet * docs/formatdomain.html.in: Fix typo.
2011-03-09 07:15:47 +08:00
<code>192.168.122.0/255.255.255.0</code>. Each guest will have an
Update domain XML docs
2008-05-08 22:20:07 +08:00
associated tun device created with a name of vnetN, which can also be
Document overriding domain interface target * docs/formatdomain.html.in: document that vnet and vif are reserved names and will be ignored if manually specified.
2009-11-20 23:25:58 +08:00
overridden with the &lt;target&gt; element (see
<a href="#elementsNICSTargetOverride">overriding the target element</a>).
Update domain XML docs
2008-05-08 22:20:07 +08:00
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='network'&gt;
&lt;source network='default'/&gt;
&lt;/interface&gt;
...
&lt;interface type='network'&gt;
&lt;source network='default'/&gt;
&lt;target dev='vnet7'/&gt;
Avoid using multicast addresses for Ethernet MAC examples * docs/formatdomain.html.in: use '00:11:22:33:44:55' instead of '11:22:33:44:55:66'
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&lt;mac address="00:11:22:33:44:55"/&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Fix a number of small typos
2009-09-22 18:54:57 +08:00
<h5><a name="elementsNICSBridge">Bridge to LAN</a></h5>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<p>
<strong><em>
This is the recommended config for general guest connectivity on
hosts with static wired networking configs
</em></strong>
</p>
<p>
Provides a bridge from the VM directly onto the LAN. This assumes
there is a bridge device on the host which has one or more of the hosts
physical NICs enslaved. The guest VM will have an associated tun device
created with a name of vnetN, which can also be overridden with the
Document overriding domain interface target * docs/formatdomain.html.in: document that vnet and vif are reserved names and will be ignored if manually specified.
2009-11-20 23:25:58 +08:00
&lt;target&gt; element (see
<a href="#elementsNICSTargetOverride">overriding the target element</a>).
The tun device will be enslaved to the bridge. The IP range / network
configuration is whatever is used on the LAN. This provides the guest VM
full incoming &amp; outgoing net access just like a physical machine.
Update domain XML docs
2008-05-08 22:20:07 +08:00
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='bridge'&gt;
&lt;source bridge='br0'/&gt;
&lt;/interface&gt;
...
&lt;interface type='bridge'&gt;
&lt;source bridge='br0'/&gt;
&lt;target dev='vnet7'/&gt;
Avoid using multicast addresses for Ethernet MAC examples * docs/formatdomain.html.in: use '00:11:22:33:44:55' instead of '11:22:33:44:55:66'
2010-04-09 20:38:12 +08:00
&lt;mac address="00:11:22:33:44:55"/&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h5><a name="elementsNICSSlirp">Userspace SLIRP stack</a></h5>
<p>
Provides a virtual LAN with NAT to the outside world. The virtual
network has DHCP &amp; DNS services and will give the guest VM addresses
starting from <code>10.0.2.15</code>. The default router will be
<code>10.0.2.2</code> and the DNS server will be <code>10.0.2.3</code>.
This networking is the only option for unprivileged users who need their
VMs to have outgoing access.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='user'/&gt;
...
&lt;interface type='user'&gt;
Avoid using multicast addresses for Ethernet MAC examples * docs/formatdomain.html.in: use '00:11:22:33:44:55' instead of '11:22:33:44:55:66'
2010-04-09 20:38:12 +08:00
&lt;mac address="00:11:22:33:44:55"/&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h5><a name="elementsNICSEthernet">Generic ethernet connection</a></h5>
<p>
Provides a means for the administrator to execute an arbitrary script
to connect the guest's network to the LAN. The guest will have a tun
device created with a name of vnetN, which can also be overridden with the
&lt;target&gt; element. After creating the tun device a shell script will
be run which is expected to do whatever host network integration is
required. By default this script is called /etc/qemu-ifup but can be
overridden.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='ethernet'/&gt;
...
&lt;interface type='ethernet'&gt;
&lt;target dev='vnet7'/&gt;
&lt;script path='/etc/qemu-ifup-mynet'/&gt;
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Add descriptions for macvtap direct type interfaces This adds a description about the 'direct' type of interface recently added for macvtap device type support on the host.
2010-02-24 17:29:23 +08:00
<h5><a name="elementsNICSDirect">Direct attachment to physical interface</a></h5>
<p>
Provides direct attachment of the virtual machine's NIC to the given
Mention direct device support since 0.7.7 in docs In the documentation mention that the direct device support is there since libvirt 0.7.7. A Linux kernel 2.6.34 is required for macvtap to be available as standard device.
2010-03-26 23:53:32 +08:00
physial interface of the host.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<span class="since">Since 0.7.7 (QEMU and KVM only)</span><br/>
Mention direct device support since 0.7.7 in docs In the documentation mention that the direct device support is there since libvirt 0.7.7. A Linux kernel 2.6.34 is required for macvtap to be available as standard device.
2010-03-26 23:53:32 +08:00
This setup requires the Linux macvtap
driver to be available. <span class="since">(Since Linux 2.6.34.)</span>
One of the modes 'vepa'
web docs -- macvtap mode explanation This adds more information about the different macvtap device modes, spells out VEPA and adds a link to a pdf at the ieee site.
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( <a href="http://www.ieee802.org/1/files/public/docs2009/new-evb-congdon-vepa-modular-0709-v01.pdf">
docs: correct range of default NAT subnet * docs/formatdomain.html.in: Fix typo.
2011-03-09 07:15:47 +08:00
'Virtual Ethernet Port Aggregator'</a>), 'bridge' or 'private'
Add descriptions for macvtap direct type interfaces This adds a description about the 'direct' type of interface recently added for macvtap device type support on the host.
2010-02-24 17:29:23 +08:00
can be chosen for the operation mode of the macvtap device, 'vepa'
web docs -- macvtap mode explanation This adds more information about the different macvtap device modes, spells out VEPA and adds a link to a pdf at the ieee site.
2010-03-05 22:41:38 +08:00
being the default mode. The individual modes cause the delivery of
packets to behave as follows:
Add descriptions for macvtap direct type interfaces This adds a description about the 'direct' type of interface recently added for macvtap device type support on the host.
2010-02-24 17:29:23 +08:00
</p>
web docs -- macvtap mode explanation This adds more information about the different macvtap device modes, spells out VEPA and adds a link to a pdf at the ieee site.
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<dl>
<dt><code>vepa</code></dt>
<dd>All VMs' packets are sent to the external bridge. Packets
whose destination is a VM on the same host as where the
packet originates from are sent back to the host by the VEPA
capable bridge (today's bridges are typically not VEPA capable).</dd>
<dt><code>bridge</code></dt>
<dd>Packets whose destination is on the same host as where they
originate from are directly delivered to the target macvtap device.
Both origin and destination devices need to be in bridge mode
for direct delivery. If either one of them is in <code>vepa</code> mode,
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
a VEPA capable bridge is required.</dd>
web docs -- macvtap mode explanation This adds more information about the different macvtap device modes, spells out VEPA and adds a link to a pdf at the ieee site.
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<dt><code>private</code></dt>
<dd>All packets are sent to the external bridge and will only be
delivered to a target VM on the same host if they are sent through an
external router or gateway and that device sends them back to the
host. This procedure is followed if either the source or destination
device is in <code>private</code> mode.</dd>
Add support for 'passthru' mode for direct network interfaces starting with kernel 2.6.38 macvtap supports a 'passthru' mode for attaching virtual functions of a SRIOV capable network card directly to a VM. This patch adds the capability to configure such a device. Signed-off-by: Dirk Herrendoerfer <d.herrendoerfer@herrendoerfer.name>
2011-05-17 19:26:09 +08:00
<dt><code>passthrough</code></dt>
<dd>This feature attaches a virtual function of a SRIOV capable
NIC directly to a VM without losing the migration capability.
All packets are sent to the VF/IF of the configured network device.
Depending on the capabilities of the device additional prerequisites or
limitations may apply; for example, on Linux this requires
kernel 2.6.38 or newer. <span class="since">Since 0.9.2</span></dd>
web docs -- macvtap mode explanation This adds more information about the different macvtap device modes, spells out VEPA and adds a link to a pdf at the ieee site.
2010-03-05 22:41:38 +08:00
</dl>
Add descriptions for macvtap direct type interfaces This adds a description about the 'direct' type of interface recently added for macvtap device type support on the host.
2010-02-24 17:29:23 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='direct'/&gt;
...
&lt;interface type='direct'&gt;
&lt;source dev='eth0' mode='vepa'/&gt;
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
documenting the 802.1Qbg parameters of a 'direct' interface This patchs adds documentation about the 802.1Qbg related parameters of the virtualport element in a 'direct' interface definition. Signed-off-by: Gerhard Stenzel <gerhard.stenzel@de.ibm.com>
2011-03-11 17:47:57 +08:00
<p>
The network access of direct attached virtual machines can be
managed by the hardware switch to which the physical interface
of the host machine is connected to.
docs: fix missing </p> * docs/formatdomain.html.in: Fix typo in last patch. Reported by Matthias Bolte.
2011-03-12 01:08:24 +08:00
</p>
documenting the 802.1Qbg parameters of a 'direct' interface This patchs adds documentation about the 802.1Qbg related parameters of the virtualport element in a 'direct' interface definition. Signed-off-by: Gerhard Stenzel <gerhard.stenzel@de.ibm.com>
2011-03-11 17:47:57 +08:00
<p>
The interface can have additional parameters as shown below,
if the switch is conforming to the IEEE 802.1Qbg standard.
The parameters of the virtualport element are documented in more detail
in the IEEE 802.1Qbg standard. The values are network specific and
should be provided by the network administrator. In 802.1Qbg terms,
the Virtual Station Interface (VSI) represents the virtual interface
of a virtual machine.
</p>
fix missing VLAN id for Qbg example For IEEE 802.1Qbg, it is necessary to use a VLAN interface. vepa itself does not require a VLAN interface. Signed-off-by: Gerhard Stenzel <stenzel at de.ibm.com>
2011-05-02 22:49:03 +08:00
<p>
Please note that IEEE 802.1Qbg requires a non-zero value for the
VLAN ID.
</p>
documenting the 802.1Qbg parameters of a 'direct' interface This patchs adds documentation about the 802.1Qbg related parameters of the virtualport element in a 'direct' interface definition. Signed-off-by: Gerhard Stenzel <gerhard.stenzel@de.ibm.com>
2011-03-11 17:47:57 +08:00
<dl>
<dt><code>managerid</code></dt>
<dd>The VSI Manager ID identifies the database containing the VSI type
and instance definitions. This is an integer value and the
value 0 is reserved.</dd>
<dt><code>typeid</code></dt>
<dd>The VSI Type ID identifies a VSI type characterizing the network
access. VSI types are typically managed by network administrator.
This is an integer value.
</dd>
<dt><code>typeidversion</code></dt>
<dd>The VSI Type Version allows multiple versions of a VSI Type.
This is an integer value.
</dd>
<dt><code>instanceid</code></dt>
<dd>The VSI Instance ID Identifier is generated when a VSI instance
(i.e. a virtual interface of a virtual machine) is created.
This is a globally unique identifier.
</dd>
</dl>
<pre>
...
&lt;devices&gt;
&lt;interface type='direct'/&gt;
...
&lt;interface type='direct'&gt;
fix missing VLAN id for Qbg example For IEEE 802.1Qbg, it is necessary to use a VLAN interface. vepa itself does not require a VLAN interface. Signed-off-by: Gerhard Stenzel <stenzel at de.ibm.com>
2011-05-02 22:49:03 +08:00
&lt;source dev='eth0.2' mode='vepa'/&gt;
documenting the 802.1Qbg parameters of a 'direct' interface This patchs adds documentation about the 802.1Qbg related parameters of the virtualport element in a 'direct' interface definition. Signed-off-by: Gerhard Stenzel <gerhard.stenzel@de.ibm.com>
2011-03-11 17:47:57 +08:00
&lt;virtualport type="802.1Qbg"&gt;
&lt;parameters managerid="11" typeid="1193047" typeidversion="2" instanceid="09b11c53-8b5c-4eeb-8f00-d84eaa0aaa4f"/&gt;
&lt;/virtualport&gt;
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Add descriptions for macvtap direct type interfaces This adds a description about the 'direct' type of interface recently added for macvtap device type support on the host.
2010-02-24 17:29:23 +08:00
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h5><a name="elementsNICSMulticast">Multicast tunnel</a></h5>
<p>
A multicast group is setup to represent a virtual network. Any VMs
whose network devices are in the same multicast group can talk to each
other even across hosts. This mode is also available to unprivileged
users. There is no default DNS or DHCP support and no outgoing network
access. To provide outgoing network access, one of the VMs should have a
2nd NIC which is connected to one of the first 4 network types and do the
appropriate routing. The multicast protocol is compatible with that used
by user mode linux guests too. The source address used must be from the
multicast address block.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='mcast'&gt;
&lt;source address='230.0.0.1' port='5558'/&gt;
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h5><a name="elementsNICSTCP">TCP tunnel</a></h5>
<p>
A TCP client/server architecture provides a virtual network. One VM
provides the server end of the network, all other VMS are configured as
clients. All network traffic is routed between the VMs via the server.
This mode is also available to unprivileged users. There is no default
DNS or DHCP support and no outgoing network access. To provide outgoing
network access, one of the VMs should have a 2nd NIC which is connected
to one of the first 4 network types and do the appropriate routing.</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='server'&gt;
Update domain XML docs
2008-05-08 22:20:07 +08:00
&lt;source address='192.168.0.1' port='5558'/&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;/interface&gt;
...
&lt;interface type='client'&gt;
&lt;source address='192.168.0.1' port='5558'/&gt;
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Documentation for NIC model selection. * docs/formatdomain.html.in, docs/formatdomain.html: Add the documentation for NIC model selection.
2008-10-13 23:25:38 +08:00
<h5><a name="elementsNICSModel">Setting the NIC model</a></h5>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='network'&gt;
&lt;source network='default'/&gt;
&lt;target dev='vnet1'/&gt;
<b>&lt;model type='ne2k_pci'/&gt;</b>
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Documentation for NIC model selection. * docs/formatdomain.html.in, docs/formatdomain.html: Add the documentation for NIC model selection.
2008-10-13 23:25:38 +08:00
<p>
For hypervisors which support this, you can set the model of
emulated network interface card.
</p>
<p>
The values for <code>type</code> aren't defined specifically by
libvirt, but by what the underlying hypervisor supports (if
any). For QEMU and KVM you can get a list of supported models
with these commands:
</p>
<pre>
qemu -net nic,model=? /dev/null
qemu-kvm -net nic,model=? /dev/null
</pre>
<p>
Typical values for QEMU and KVM include:
ne2k_isa i82551 i82557b i82559er ne2k_pci pcnet rtl8139 e1000 virtio
</p>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Add txmode attribute to interface XML for virtio backend This is in response to: https://bugzilla.redhat.com/show_bug.cgi?id=629662 Explanation qemu's virtio-net-pci driver allows setting the algorithm used for tx packets to either "bh" or "timer". This is done by adding ",tx=bh" or ",tx=timer" to the "-device virtio-net-pci" commandline option. 'bh' stands for 'bottom half'; when this is set, packet tx is all done in an iothread in the bottom half of the driver. (In libvirt, this option is called the more descriptive "iothread".) 'timer' means that tx work is done in qemu, and if there is more tx data than can be sent at the present time, a timer is set before qemu moves on to do other things; when the timer fires, another attempt is made to send more data. (libvirt retains the name "timer" for this option.) The resulting difference, according to the qemu developer who added the option is: bh makes tx more asynchronous and reduces latency, but potentially causes more processor bandwidth contention since the cpu doing the tx isn't necessarily the cpu where the guest generated the packets. Solution This patch provides a libvirt domain xml knob to change the option on the qemu commandline, by adding a new attribute "txmode" to the <driver> element that can be placed inside any <interface> element in a domain definition. It's use would be something like this: <interface ...> ... <model type='virtio'/> <driver txmode='iothread'/> ... </interface> I chose to put this setting as an attribute to <driver> rather than as a sub-element to <tune> because it is specific to the virtio-net driver, not something that is generally usable by all network drivers. (note that this is the same placement as the "driver name=..." attribute used to choose kernel vs. userland backend for the virtio-net driver.) Actually adding the tx=xxx option to the qemu commandline is only done if the version of qemu being used advertises it in the output of qemu -device virtio-net-pci,? If a particular txmode is requested in the XML, and the option isn't listed in that help output, an UNSUPPORTED_CONFIG error is logged, and the domain fails to start.
2011-02-04 04:20:01 +08:00
<h5><a name="elementsDriverBackendOptions">Setting NIC driver-specific options</a></h5>
<pre>
...
&lt;devices&gt;
&lt;interface type='network'&gt;
&lt;source network='default'/&gt;
&lt;target dev='vnet1'/&gt;
&lt;model type='virtio'/&gt;
qemu: domain I/O asynchronous handling For virtio disks and interfaces, qemu allows users to enable or disable ioeventfd feature. This means, qemu can execute domain code, while another thread waits for I/O event. Basically, in some cases it is win, in some loss. This feature is available via 'ioeventfd' attribute in disk and interface <driver> element. It accepts 'on' and 'off'. Leaving this attribute out defaults to hypervisor decision.
2011-06-20 16:26:47 +08:00
<b>&lt;driver name='vhost' txmode='iothread' ioeventfd='on'/&gt;</b>
Add txmode attribute to interface XML for virtio backend This is in response to: https://bugzilla.redhat.com/show_bug.cgi?id=629662 Explanation qemu's virtio-net-pci driver allows setting the algorithm used for tx packets to either "bh" or "timer". This is done by adding ",tx=bh" or ",tx=timer" to the "-device virtio-net-pci" commandline option. 'bh' stands for 'bottom half'; when this is set, packet tx is all done in an iothread in the bottom half of the driver. (In libvirt, this option is called the more descriptive "iothread".) 'timer' means that tx work is done in qemu, and if there is more tx data than can be sent at the present time, a timer is set before qemu moves on to do other things; when the timer fires, another attempt is made to send more data. (libvirt retains the name "timer" for this option.) The resulting difference, according to the qemu developer who added the option is: bh makes tx more asynchronous and reduces latency, but potentially causes more processor bandwidth contention since the cpu doing the tx isn't necessarily the cpu where the guest generated the packets. Solution This patch provides a libvirt domain xml knob to change the option on the qemu commandline, by adding a new attribute "txmode" to the <driver> element that can be placed inside any <interface> element in a domain definition. It's use would be something like this: <interface ...> ... <model type='virtio'/> <driver txmode='iothread'/> ... </interface> I chose to put this setting as an attribute to <driver> rather than as a sub-element to <tune> because it is specific to the virtio-net driver, not something that is generally usable by all network drivers. (note that this is the same placement as the "driver name=..." attribute used to choose kernel vs. userland backend for the virtio-net driver.) Actually adding the tx=xxx option to the qemu commandline is only done if the version of qemu being used advertises it in the output of qemu -device virtio-net-pci,? If a particular txmode is requested in the XML, and the option isn't listed in that help output, an UNSUPPORTED_CONFIG error is logged, and the domain fails to start.
2011-02-04 04:20:01 +08:00
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
<p>
Some NICs may have tunable driver-specific options. These are
set as attributes of the <code>driver</code> sub-element of the
interface definition. Currently the following attributes are
available for the <code>"virtio"</code> NIC driver:
</p>
<dl>
docs: document <driver name='vhost'/> for interfaces * docs/formatdomain.html.in: Document virtio backend selection.
2011-03-09 07:35:17 +08:00
<dt><code>name</code></dt>
<dd>
The optional <code>name</code> attribute forces which type of
backend driver to use. The value can be either 'qemu' (a
user-space backend) or 'vhost' (a kernel backend, which
requires the vhost module to be provided by the kernel); an
attempt to require the vhost driver without kernel support
will be rejected. If this attribute is not present, then the
domain defaults to 'vhost' if present, but silently falls back
to 'qemu' without error.
<span class="since">Since 0.8.8 (QEMU and KVM only)</span>
</dd>
Add txmode attribute to interface XML for virtio backend This is in response to: https://bugzilla.redhat.com/show_bug.cgi?id=629662 Explanation qemu's virtio-net-pci driver allows setting the algorithm used for tx packets to either "bh" or "timer". This is done by adding ",tx=bh" or ",tx=timer" to the "-device virtio-net-pci" commandline option. 'bh' stands for 'bottom half'; when this is set, packet tx is all done in an iothread in the bottom half of the driver. (In libvirt, this option is called the more descriptive "iothread".) 'timer' means that tx work is done in qemu, and if there is more tx data than can be sent at the present time, a timer is set before qemu moves on to do other things; when the timer fires, another attempt is made to send more data. (libvirt retains the name "timer" for this option.) The resulting difference, according to the qemu developer who added the option is: bh makes tx more asynchronous and reduces latency, but potentially causes more processor bandwidth contention since the cpu doing the tx isn't necessarily the cpu where the guest generated the packets. Solution This patch provides a libvirt domain xml knob to change the option on the qemu commandline, by adding a new attribute "txmode" to the <driver> element that can be placed inside any <interface> element in a domain definition. It's use would be something like this: <interface ...> ... <model type='virtio'/> <driver txmode='iothread'/> ... </interface> I chose to put this setting as an attribute to <driver> rather than as a sub-element to <tune> because it is specific to the virtio-net driver, not something that is generally usable by all network drivers. (note that this is the same placement as the "driver name=..." attribute used to choose kernel vs. userland backend for the virtio-net driver.) Actually adding the tx=xxx option to the qemu commandline is only done if the version of qemu being used advertises it in the output of qemu -device virtio-net-pci,? If a particular txmode is requested in the XML, and the option isn't listed in that help output, an UNSUPPORTED_CONFIG error is logged, and the domain fails to start.
2011-02-04 04:20:01 +08:00
<dt><code>txmode</code></dt>
<dd>
The <code>txmode</code> attribute specifies how to handle
transmission of packets when the transmit buffer is full. The
value can be either 'iothread' or 'timer'.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
<span class="since">Since 0.8.8 (QEMU and KVM only)</span><br/><br/>
Add txmode attribute to interface XML for virtio backend This is in response to: https://bugzilla.redhat.com/show_bug.cgi?id=629662 Explanation qemu's virtio-net-pci driver allows setting the algorithm used for tx packets to either "bh" or "timer". This is done by adding ",tx=bh" or ",tx=timer" to the "-device virtio-net-pci" commandline option. 'bh' stands for 'bottom half'; when this is set, packet tx is all done in an iothread in the bottom half of the driver. (In libvirt, this option is called the more descriptive "iothread".) 'timer' means that tx work is done in qemu, and if there is more tx data than can be sent at the present time, a timer is set before qemu moves on to do other things; when the timer fires, another attempt is made to send more data. (libvirt retains the name "timer" for this option.) The resulting difference, according to the qemu developer who added the option is: bh makes tx more asynchronous and reduces latency, but potentially causes more processor bandwidth contention since the cpu doing the tx isn't necessarily the cpu where the guest generated the packets. Solution This patch provides a libvirt domain xml knob to change the option on the qemu commandline, by adding a new attribute "txmode" to the <driver> element that can be placed inside any <interface> element in a domain definition. It's use would be something like this: <interface ...> ... <model type='virtio'/> <driver txmode='iothread'/> ... </interface> I chose to put this setting as an attribute to <driver> rather than as a sub-element to <tune> because it is specific to the virtio-net driver, not something that is generally usable by all network drivers. (note that this is the same placement as the "driver name=..." attribute used to choose kernel vs. userland backend for the virtio-net driver.) Actually adding the tx=xxx option to the qemu commandline is only done if the version of qemu being used advertises it in the output of qemu -device virtio-net-pci,? If a particular txmode is requested in the XML, and the option isn't listed in that help output, an UNSUPPORTED_CONFIG error is logged, and the domain fails to start.
2011-02-04 04:20:01 +08:00
If set to 'iothread', packet tx is all done in an iothread in
the bottom half of the driver (this option translates into
adding "tx=bh" to the qemu commandline -device virtio-net-pci
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
option).<br/><br/>
Add txmode attribute to interface XML for virtio backend This is in response to: https://bugzilla.redhat.com/show_bug.cgi?id=629662 Explanation qemu's virtio-net-pci driver allows setting the algorithm used for tx packets to either "bh" or "timer". This is done by adding ",tx=bh" or ",tx=timer" to the "-device virtio-net-pci" commandline option. 'bh' stands for 'bottom half'; when this is set, packet tx is all done in an iothread in the bottom half of the driver. (In libvirt, this option is called the more descriptive "iothread".) 'timer' means that tx work is done in qemu, and if there is more tx data than can be sent at the present time, a timer is set before qemu moves on to do other things; when the timer fires, another attempt is made to send more data. (libvirt retains the name "timer" for this option.) The resulting difference, according to the qemu developer who added the option is: bh makes tx more asynchronous and reduces latency, but potentially causes more processor bandwidth contention since the cpu doing the tx isn't necessarily the cpu where the guest generated the packets. Solution This patch provides a libvirt domain xml knob to change the option on the qemu commandline, by adding a new attribute "txmode" to the <driver> element that can be placed inside any <interface> element in a domain definition. It's use would be something like this: <interface ...> ... <model type='virtio'/> <driver txmode='iothread'/> ... </interface> I chose to put this setting as an attribute to <driver> rather than as a sub-element to <tune> because it is specific to the virtio-net driver, not something that is generally usable by all network drivers. (note that this is the same placement as the "driver name=..." attribute used to choose kernel vs. userland backend for the virtio-net driver.) Actually adding the tx=xxx option to the qemu commandline is only done if the version of qemu being used advertises it in the output of qemu -device virtio-net-pci,? If a particular txmode is requested in the XML, and the option isn't listed in that help output, an UNSUPPORTED_CONFIG error is logged, and the domain fails to start.
2011-02-04 04:20:01 +08:00
If set to 'timer', tx work is done in qemu, and if there is
more tx data than can be sent at the present time, a timer is
set before qemu moves on to do other things; when the timer
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
fires, another attempt is made to send more data.<br/><br/>
Add txmode attribute to interface XML for virtio backend This is in response to: https://bugzilla.redhat.com/show_bug.cgi?id=629662 Explanation qemu's virtio-net-pci driver allows setting the algorithm used for tx packets to either "bh" or "timer". This is done by adding ",tx=bh" or ",tx=timer" to the "-device virtio-net-pci" commandline option. 'bh' stands for 'bottom half'; when this is set, packet tx is all done in an iothread in the bottom half of the driver. (In libvirt, this option is called the more descriptive "iothread".) 'timer' means that tx work is done in qemu, and if there is more tx data than can be sent at the present time, a timer is set before qemu moves on to do other things; when the timer fires, another attempt is made to send more data. (libvirt retains the name "timer" for this option.) The resulting difference, according to the qemu developer who added the option is: bh makes tx more asynchronous and reduces latency, but potentially causes more processor bandwidth contention since the cpu doing the tx isn't necessarily the cpu where the guest generated the packets. Solution This patch provides a libvirt domain xml knob to change the option on the qemu commandline, by adding a new attribute "txmode" to the <driver> element that can be placed inside any <interface> element in a domain definition. It's use would be something like this: <interface ...> ... <model type='virtio'/> <driver txmode='iothread'/> ... </interface> I chose to put this setting as an attribute to <driver> rather than as a sub-element to <tune> because it is specific to the virtio-net driver, not something that is generally usable by all network drivers. (note that this is the same placement as the "driver name=..." attribute used to choose kernel vs. userland backend for the virtio-net driver.) Actually adding the tx=xxx option to the qemu commandline is only done if the version of qemu being used advertises it in the output of qemu -device virtio-net-pci,? If a particular txmode is requested in the XML, and the option isn't listed in that help output, an UNSUPPORTED_CONFIG error is logged, and the domain fails to start.
2011-02-04 04:20:01 +08:00
The resulting difference, according to the qemu developer who
added the option is: "bh makes tx more asynchronous and reduces
latency, but potentially causes more processor bandwidth
contention since the cpu doing the tx isn't necessarily the
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
cpu where the guest generated the packets."<br/><br/>
Add txmode attribute to interface XML for virtio backend This is in response to: https://bugzilla.redhat.com/show_bug.cgi?id=629662 Explanation qemu's virtio-net-pci driver allows setting the algorithm used for tx packets to either "bh" or "timer". This is done by adding ",tx=bh" or ",tx=timer" to the "-device virtio-net-pci" commandline option. 'bh' stands for 'bottom half'; when this is set, packet tx is all done in an iothread in the bottom half of the driver. (In libvirt, this option is called the more descriptive "iothread".) 'timer' means that tx work is done in qemu, and if there is more tx data than can be sent at the present time, a timer is set before qemu moves on to do other things; when the timer fires, another attempt is made to send more data. (libvirt retains the name "timer" for this option.) The resulting difference, according to the qemu developer who added the option is: bh makes tx more asynchronous and reduces latency, but potentially causes more processor bandwidth contention since the cpu doing the tx isn't necessarily the cpu where the guest generated the packets. Solution This patch provides a libvirt domain xml knob to change the option on the qemu commandline, by adding a new attribute "txmode" to the <driver> element that can be placed inside any <interface> element in a domain definition. It's use would be something like this: <interface ...> ... <model type='virtio'/> <driver txmode='iothread'/> ... </interface> I chose to put this setting as an attribute to <driver> rather than as a sub-element to <tune> because it is specific to the virtio-net driver, not something that is generally usable by all network drivers. (note that this is the same placement as the "driver name=..." attribute used to choose kernel vs. userland backend for the virtio-net driver.) Actually adding the tx=xxx option to the qemu commandline is only done if the version of qemu being used advertises it in the output of qemu -device virtio-net-pci,? If a particular txmode is requested in the XML, and the option isn't listed in that help output, an UNSUPPORTED_CONFIG error is logged, and the domain fails to start.
2011-02-04 04:20:01 +08:00
qemu: domain I/O asynchronous handling For virtio disks and interfaces, qemu allows users to enable or disable ioeventfd feature. This means, qemu can execute domain code, while another thread waits for I/O event. Basically, in some cases it is win, in some loss. This feature is available via 'ioeventfd' attribute in disk and interface <driver> element. It accepts 'on' and 'off'. Leaving this attribute out defaults to hypervisor decision.
2011-06-20 16:26:47 +08:00
<b>In general you should leave this option alone, unless you
are very certain you know what you are doing.</b>
</dd>
<dt><code>ioeventfd</code></dt>
<dd>
This optional attribute allows users to set
<a href='https://patchwork.kernel.org/patch/43390/'>
domain I/O asynchronous handling</a> for interface device.
The default is left to the discretion of the hypervisor.
Accepted values are "on" and "off". Enabling this allows
qemu to execute VM while a separate thread handles I/O.
Typically guests experiencing high system CPU utilization
during I/O will benefit from this. On the other hand,
on overloaded host it could increase guest I/O latency.
<span class="since">Since 0.9.3 (QEMU and KVM only)</span><br/><br/>
Add txmode attribute to interface XML for virtio backend This is in response to: https://bugzilla.redhat.com/show_bug.cgi?id=629662 Explanation qemu's virtio-net-pci driver allows setting the algorithm used for tx packets to either "bh" or "timer". This is done by adding ",tx=bh" or ",tx=timer" to the "-device virtio-net-pci" commandline option. 'bh' stands for 'bottom half'; when this is set, packet tx is all done in an iothread in the bottom half of the driver. (In libvirt, this option is called the more descriptive "iothread".) 'timer' means that tx work is done in qemu, and if there is more tx data than can be sent at the present time, a timer is set before qemu moves on to do other things; when the timer fires, another attempt is made to send more data. (libvirt retains the name "timer" for this option.) The resulting difference, according to the qemu developer who added the option is: bh makes tx more asynchronous and reduces latency, but potentially causes more processor bandwidth contention since the cpu doing the tx isn't necessarily the cpu where the guest generated the packets. Solution This patch provides a libvirt domain xml knob to change the option on the qemu commandline, by adding a new attribute "txmode" to the <driver> element that can be placed inside any <interface> element in a domain definition. It's use would be something like this: <interface ...> ... <model type='virtio'/> <driver txmode='iothread'/> ... </interface> I chose to put this setting as an attribute to <driver> rather than as a sub-element to <tune> because it is specific to the virtio-net driver, not something that is generally usable by all network drivers. (note that this is the same placement as the "driver name=..." attribute used to choose kernel vs. userland backend for the virtio-net driver.) Actually adding the tx=xxx option to the qemu commandline is only done if the version of qemu being used advertises it in the output of qemu -device virtio-net-pci,? If a particular txmode is requested in the XML, and the option isn't listed in that help output, an UNSUPPORTED_CONFIG error is logged, and the domain fails to start.
2011-02-04 04:20:01 +08:00
<b>In general you should leave this option alone, unless you
are very certain you know what you are doing.</b>
</dd>
</dl>
Document overriding domain interface target * docs/formatdomain.html.in: document that vnet and vif are reserved names and will be ignored if manually specified.
2009-11-20 23:25:58 +08:00
<h5><a name="elementsNICSTargetOverride">Overriding the target element</a></h5>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;interface type='network'&gt;
&lt;source network='default'/&gt;
<b>&lt;target dev='vnet1'/&gt;</b>
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
Document overriding domain interface target * docs/formatdomain.html.in: document that vnet and vif are reserved names and will be ignored if manually specified.
2009-11-20 23:25:58 +08:00
<p>
If no target is specified, certain hypervisors will automatically
generate a name for the created tun device. This name can be manually
specifed, however the name <i>must not start with either 'vnet' or
'vif'</i>, which are prefixes reserved by libvirt and certain
hypervisors. Manually specified targets using these prefixes will be
ignored.
</p>
Introduce per-device boot element Currently, boot order can be specified per device class but there is no way to specify exact disk/NIC device to boot from. This patch adds <boot order='N'/> element which can be used inside <disk/> and <interface/>. This is incompatible with the older os/boot element. Since not all hypervisors support per-device boot specification, new deviceboot flag is included in capabilities XML for hypervisors which understand the new boot element. Presence of the flag allows (but doesn't require) users to use the new style boot order specification.
2011-01-12 22:19:34 +08:00
<h5><a name="elementsNICSBoot">Specifying boot order</a></h5>
<pre>
...
&lt;devices&gt;
&lt;interface type='network'&gt;
&lt;source network='default'/&gt;
&lt;target dev='vnet1'/&gt;
<b>&lt;boot order='1'/&gt;</b>
&lt;/interface&gt;
&lt;/devices&gt;
...</pre>
<p>
For hypervisors which support this, you can set exact NIC which should
be used for network boot. The <code>order</code> attribute determines
the order in which devices will be tried during boot sequence. The
per-device <code>boot</code> elements cannot be used together with
general boot elements in
<a href="#elementsOSBIOS">BIOS bootloader</a> section.
<span class="since">Since 0.8.8</span>
</p>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h4><a name="elementsInput">Input devices</a></h4>
<p>
Input devices allow interaction with the graphical framebuffer in the guest
virtual machine. When enabling the framebuffer, an input device is automatically
provided. It may be possible to add additional devices explicitly, for example,
to provide a graphics tablet for absolute cursor movement.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;input type='mouse' bus='usb'/&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<dl>
<dt><code>input</code></dt>
fix typos in docs docs/formatdomain.html docs/formatdomain.html.in docs/java.html docs/java.html.in
2008-08-08 18:24:14 +08:00
<dd>The <code>input</code> element has one mandatory attribute, the <code>type</code>
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
whose value can be either 'mouse' or 'tablet'. The latter provides absolute
cursor movement, while the former uses relative movement. The optional
<code>bus</code> attribute can be used to refine the exact device type.
It takes values "xen" (paravirtualized), "ps2" and "usb".</dd>
Update domain XML docs
2008-05-08 22:20:07 +08:00
</dl>
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
<p>
The <code>input</code> element has an optional
sub-element <code>&lt;address&gt;</code> which can tie the
device to a particular PCI slot.
</p>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h4><a name="elementsGraphics">Graphical framebuffers</a></h4>
<p>
A graphics device allows for graphical interaction with the
guest OS. A guest will typically have either a framebuffer
or a text console configured to allow interaction with the
admin.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;graphics type='sdl' display=':0.0'/&gt;
&lt;graphics type='vnc' port='5904'/&gt;
&lt;graphics type='rdp' autoport='yes' multiUser='yes' /&gt;
&lt;graphics type='desktop' fullscreen='yes'/&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<dl>
<dt><code>graphics</code></dt>
<dd>The <code>graphics</code> element has a mandatory <code>type</code>
add doc for graphic and video elements * docs/formatdomain.html.in: explain the new syntax of the video and graphic elements in the domain XML
2009-09-22 16:32:14 +08:00
attribute which takes the value "sdl", "vnc", "rdp" or "desktop":
<dl>
<dt><code>"sdl"</code></dt>
<dd>
This displays a window on the host desktop, it can take 3 optional arguments:
a <code>display</code> attribute for the display to use, an <code>xauth</code>
attribute for the authentication identifier, and an optional <code>fullscreen</code>
attribute accepting values 'yes' or 'no'.
</dd>
<dt><code>"vnc"</code></dt>
<dd>
Starts a VNC server. The <code>port</code> attribute specifies the TCP
port number (with -1 as legacy syntax indicating that it should be
auto-allocated). The <code>autoport</code> attribute is the new
preferred syntax for indicating autoallocation of the TCP port to use.
The <code>listen</code> attribute is an IP address for the server to
listen on. The <code>passwd</code> attribute provides a VNC password
in clear text. The <code>keymap</code> attribute specifies the keymap
Define XML syntax for password expiry This extends the XML syntax for <graphics> to allow a password expiry time to be set eg <graphics type='vnc' port='5900' autoport='yes' keymap='en-us' passwd='12345' passwdValidTo='2010-04-09T15:51:00'/> The timestamp is in UTC. * src/conf/domain_conf.h: Pull passwd out into separate struct virDomainGraphicsAuthDef to allow sharing between VNC & SPICE * src/conf/domain_conf.c: Add parsing/formatting of new passwdValidTo argument * src/opennebula/one_conf.c, src/qemu/qemu_conf.c, src/qemu/qemu_driver.c, src/xen/xend_internal.c, src/xen/xm_internal.c: Update for changed struct containing VNC password
2010-04-08 20:43:23 +08:00
to use. It is possible to set a limit on the validity of the password
be giving an timestamp <code>passwdValidTo='2010-04-09T15:51:00'</code>
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
assumed to be in UTC. NB, this may not be supported by all hypervisors.<br/>
<br/>
qemu: Allow serving VNC over a unix domain socket QEMU supports serving VNC over a unix domain socket rather than traditional TCP host/port. This is specified with: <graphics type='vnc' socket='/foo/bar/baz'/> This provides better security access control than VNC listening on 127.0.0.1, but will cause issues with tools that rely on the lax security (virt-manager in fedora runs as regular user by default, and wouldn't be able to access a socket owned by 'qemu' or 'root'). Also not currently supported by any clients, though I have patches for virt-manager, and virt-viewer should be simple to update. v2: schema: Make listen vs. socket a <choice>
2011-01-08 05:03:07 +08:00
Rather than using listen/port, QEMU supports a <code>socket</code>
attribute for listening on a unix domain socket path.
<span class="since">Since 0.8.8</span>
Add a <graphics> type for SPICE protocol This adds an element <graphics type='spice' port='5903' tlsPort='5904' autoport='yes' listen='127.0.0.1'/> This is the bare minimum that should be exposed in the guest config for SPICE. Other parameters are better handled as per host level configuration tunables * docs/schemas/domain.rng: Define the SPICE <graphics> schema * src/domain_conf.h, src/domain_conf.c: Add parsing and formatting for SPICE graphics config * src/qemu_conf.c: Complain about unsupported graphics types
2009-08-14 17:54:14 +08:00
</dd>
<dt><code>"spice"</code></dt>
<dd>
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
2011-02-05 02:16:35 +08:00
<p>
Add a <graphics> type for SPICE protocol This adds an element <graphics type='spice' port='5903' tlsPort='5904' autoport='yes' listen='127.0.0.1'/> This is the bare minimum that should be exposed in the guest config for SPICE. Other parameters are better handled as per host level configuration tunables * docs/schemas/domain.rng: Define the SPICE <graphics> schema * src/domain_conf.h, src/domain_conf.c: Add parsing and formatting for SPICE graphics config * src/qemu_conf.c: Complain about unsupported graphics types
2009-08-14 17:54:14 +08:00
Starts a SPICE server. The <code>port</code> attribute specifies the TCP
port number (with -1 as legacy syntax indicating that it should be
auto-allocated), while <code>tlsPort</code> gives an alternative
secure port number. The <code>autoport</code> attribute is the new
preferred syntax for indicating autoallocation of both port numbers.
The <code>listen</code> attribute is an IP address for the server to
listen on. The <code>passwd</code> attribute provides a SPICE password
in clear text. The <code>keymap</code> attribute specifies the keymap
Define XML syntax for password expiry This extends the XML syntax for <graphics> to allow a password expiry time to be set eg <graphics type='vnc' port='5900' autoport='yes' keymap='en-us' passwd='12345' passwdValidTo='2010-04-09T15:51:00'/> The timestamp is in UTC. * src/conf/domain_conf.h: Pull passwd out into separate struct virDomainGraphicsAuthDef to allow sharing between VNC & SPICE * src/conf/domain_conf.c: Add parsing/formatting of new passwdValidTo argument * src/opennebula/one_conf.c, src/qemu/qemu_conf.c, src/qemu/qemu_driver.c, src/xen/xend_internal.c, src/xen/xm_internal.c: Update for changed struct containing VNC password
2010-04-08 20:43:23 +08:00
to use. It is possible to set a limit on the validity of the password
be giving an timestamp <code>passwdValidTo='2010-04-09T15:51:00'</code>
assumed to be in UTC. NB, this may not be supported by all hypervisors.
docs: Document first release with spice and qxl
2011-03-18 00:04:35 +08:00
<span class="since">"spice" since 0.8.6</span>.
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
2011-02-05 02:16:35 +08:00
</p>
<p>
Support SPICE channel security options This extends the SPICE XML to allow channel security options <graphics type='spice' port='-1' tlsPort='-1' autoport='yes'> <channel name='main' mode='secure'/> <channel name='record' mode='insecure'/> </graphics> Any non-specified channel uses the default, which allows both secure & insecure usage * src/conf/domain_conf.c, src/conf/domain_conf.h, src/libvirt_private.syms: Add XML syntax for specifying per channel security options for spice. * src/qemu/qemu_conf.c: Configure channel security with spice
2010-04-10 00:56:00 +08:00
When SPICE has both a normal and TLS secured TCP port configured, it
can be desirable to restrict what channels can be run on each port.
This is achieved by adding one or more &lt;channel&gt; elements inside
the main &lt;graphics&gt; element. Valid channel names include
smartcard: add spicevmc support Adds <smartcard mode='passthrough' type='spicevmc'/>, which uses the new <channel name='smartcard'/> of <graphics type='spice'>. * docs/schemas/domain.rng: Support new XML. * docs/formatdomain.html.in: Document it. * src/conf/domain_conf.h (virDomainGraphicsSpiceChannelName): New enum value. (virDomainChrSpicevmcName): New enum. (virDomainChrSourceDef): Distinguish spicevmc types. * src/conf/domain_conf.c (virDomainGraphicsSpiceChannelName): Add smartcard. (virDomainSmartcardDefParseXML): Parse it. (virDomainChrDefParseXML, virDomainSmartcardDefParseXML): Set spicevmc name. (virDomainChrSpicevmc): New enum conversion functions. * src/libvirt_private.syms: Export new functions. * src/qemu/qemu_command.c (qemuBuildChrChardevStr): Conditionalize name. * tests/qemuxml2argvtest.c (domain): New test. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-spicevmc.args: New file. * tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-spicevmc.xml: Likewise.
2011-02-04 10:23:31 +08:00
<code>main</code>, <code>display</code>, <code>inputs</code>,
<code>cursor</code>, <code>playback</code>, <code>record</code>;
and <span class="since">since 0.8.8</span>: <code>smartcard</code>.
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
2011-02-05 02:16:35 +08:00
</p>
<pre>
Support SPICE channel security options This extends the SPICE XML to allow channel security options <graphics type='spice' port='-1' tlsPort='-1' autoport='yes'> <channel name='main' mode='secure'/> <channel name='record' mode='insecure'/> </graphics> Any non-specified channel uses the default, which allows both secure & insecure usage * src/conf/domain_conf.c, src/conf/domain_conf.h, src/libvirt_private.syms: Add XML syntax for specifying per channel security options for spice. * src/qemu/qemu_conf.c: Configure channel security with spice
2010-04-10 00:56:00 +08:00
&lt;graphics type='spice' port='-1' tlsPort='-1' autoport='yes'&gt;
&lt;channel name='main' mode='secure'/&gt;
&lt;channel name='record' mode='insecure'/&gt;
Spice: support audio, images and stream compression This extends the SPICE XML to allow variable compression settings for audio, images and streaming: <graphics type='spice' port='5901' tlsPort='-1' autoport='yes'> <image compression='auto_glz'/> <jpeg compression='auto'/> <zlib compression='auto'/> <playback compression='on'/> </graphics> All new elements are optional.
2011-04-14 16:44:20 +08:00
&lt;image compression='auto_glz'/&gt;
spice: support streaming-video parameter This adds a streaming-video=filter|all|off attribute. It is used to change the behavior of video stream detection in spice, the default is filter (the default for libvirt is not to specify it - the actual default is defined in libspice-server.so). Usage: <graphics type='spice' autoport='yes'> <streaming mode='off'/> </graphics> Tested with the above and with tests/qemuxml2argvtest. Signed-off-by: Alon Levy <alevy@redhat.com>
2011-05-23 23:16:42 +08:00
&lt;streaming mode='filter'/&gt;
spice: add <clipboard copypaste='yes|no'> option From a security pov copy and paste between the guest and the client is not always desirable. So we need to be able to enable/disable this. The best place to do this from an administration pov is on the hypervisor, so the qemu cmdline is getting a spice disable-copy-paste option, see bug 693645. Example qemu invocation: qemu -spice port=5932,disable-ticketing,disable-copy-paste https://bugzilla.redhat.com/show_bug.cgi?id=693661
2011-06-14 19:35:48 +08:00
&lt;clipboard copypaste='no'/&gt;
Support SPICE channel security options This extends the SPICE XML to allow channel security options <graphics type='spice' port='-1' tlsPort='-1' autoport='yes'> <channel name='main' mode='secure'/> <channel name='record' mode='insecure'/> </graphics> Any non-specified channel uses the default, which allows both secure & insecure usage * src/conf/domain_conf.c, src/conf/domain_conf.h, src/libvirt_private.syms: Add XML syntax for specifying per channel security options for spice. * src/qemu/qemu_conf.c: Configure channel security with spice
2010-04-10 00:56:00 +08:00
&lt;/graphics&gt;</pre>
Spice: support audio, images and stream compression This extends the SPICE XML to allow variable compression settings for audio, images and streaming: <graphics type='spice' port='5901' tlsPort='-1' autoport='yes'> <image compression='auto_glz'/> <jpeg compression='auto'/> <zlib compression='auto'/> <playback compression='on'/> </graphics> All new elements are optional.
2011-04-14 16:44:20 +08:00
<p>
Spice supports variable compression settings for audio,
images and streaming, <span class="since">since
0.9.1</span>. These settings are accessible via
the <code>compression</code> attribute in all following
elements: <code>image</code> to set image compression
(accepts <code>auto_glz</code>, <code>auto_lz</code>,
<code>quic</code>, <code>glz</code>, <code>lz</code>,
<code>off</code>), <code>jpeg</code> for JPEG
compression for images over wan
(accepts <code>auto</code>, <code>never</code>,
<code>always</code>), <code>zlib</code> for configuring
wan image compression (accepts <code>auto</code>,
<code>never</code>, <code>always</code>)
and <code>playback</code> for enabling audio stream
compression (accepts <code>on</code> or <code>off</code>).
</p>
spice: support streaming-video parameter This adds a streaming-video=filter|all|off attribute. It is used to change the behavior of video stream detection in spice, the default is filter (the default for libvirt is not to specify it - the actual default is defined in libspice-server.so). Usage: <graphics type='spice' autoport='yes'> <streaming mode='off'/> </graphics> Tested with the above and with tests/qemuxml2argvtest. Signed-off-by: Alon Levy <alevy@redhat.com>
2011-05-23 23:16:42 +08:00
<p>
Streaming mode is set by the <code>streaming</code>
element, settings it's <code>mode</code> attribute to one
of <code>filter</code>, <code>all</code>
or <code>off</code>, <span class="since">since 0.9.2</span>.
</p>
spice: add <clipboard copypaste='yes|no'> option From a security pov copy and paste between the guest and the client is not always desirable. So we need to be able to enable/disable this. The best place to do this from an administration pov is on the hypervisor, so the qemu cmdline is getting a spice disable-copy-paste option, see bug 693645. Example qemu invocation: qemu -spice port=5932,disable-ticketing,disable-copy-paste https://bugzilla.redhat.com/show_bug.cgi?id=693661
2011-06-14 19:35:48 +08:00
<p>
Copy &amp; Paste functionality (via Spice agent) is set
by the <code>clipboard</code> element. It is enabled by
default, and can be disabled by setting
the <code>copypaste</code> property
to <code>no</code>, <span class="since">since
0.9.3</span>.
</>
add doc for graphic and video elements * docs/formatdomain.html.in: explain the new syntax of the video and graphic elements in the domain XML
2009-09-22 16:32:14 +08:00
</dd>
<dt><code>"rdp"</code></dt>
<dd>
Starts a RDP server. The <code>port</code> attribute
specifies the TCP port number (with -1 as legacy syntax indicating
that it should be auto-allocated). The <code>autoport</code> attribute
is the new preferred syntax for indicating autoallocation of the TCP
port to use. The <code>replaceUser</code> attribute is a boolean deciding
whether multiple simultaneous connections to the VM are permitted.
The <code>multiUser</code> whether the existing connection must be dropped
and a new connection must be established by the VRDP server, when a new
client connects in single connection mode.
</dd>
<dt><code>"desktop"</code></dt>
<dd>
This value is reserved for VirtualBox domains for the moment. It displays
a window on the host desktop, similarly to "sdl", but using the VirtualBox
viewer. Just like "sdl", it accepts the optional attributes <code>display</code>
and <code>fullscreen</code>.
</dd>
</dl>
</dd>
</dl>
<h4><a name="elementsVideo">Video devices</a></h4>
<p>
A video device.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;video&gt;
&lt;model type='vga' vram='8192' heads='1'&gt;
&lt;acceleration accel3d='yes' accel3d='yes'/&gt;
&lt;/model&gt;
&lt;/video&gt;
&lt;/devices&gt;
...</pre>
add doc for graphic and video elements * docs/formatdomain.html.in: explain the new syntax of the video and graphic elements in the domain XML
2009-09-22 16:32:14 +08:00
<dl>
<dt><code>video</code></dt>
Fix and improve domain xml video element description The description mismatched the actual structure since the video element was introduced. The nvram attribute is actually called vram. Specify the unit of the vram attribute.
2009-12-14 01:25:17 +08:00
<dd>
The <code>video</code> element is the a container for describing
docs: Add doc for video element For backwards compatibility, if no <video> is set but there is a <graphics> tag, then we add a default <video> according to the guest type. Add docs to tell the user about this to not make them confused. Especially if they remove the video (such as via "virsh edit"), it will be surprised for them to see the video element is still in domain XML.
2011-06-07 16:56:06 +08:00
video devices. For backwards compatability, if no <code>video</code>
is set but there is a <code>graphics</code> in domain xml, then libvirt
will add a default <code>video</code> according to the guest type.
For a guest of type "kvm", the default <code>video</code> for it is:
<code>type</code> with value "cirrus", <code>vram</code> with value
"9216", and <code>heads</code> with value "1".
Fix and improve domain xml video element description The description mismatched the actual structure since the video element was introduced. The nvram attribute is actually called vram. Specify the unit of the vram attribute.
2009-12-14 01:25:17 +08:00
</dd>
add doc for graphic and video elements * docs/formatdomain.html.in: explain the new syntax of the video and graphic elements in the domain XML
2009-09-22 16:32:14 +08:00
Fix and improve domain xml video element description The description mismatched the actual structure since the video element was introduced. The nvram attribute is actually called vram. Specify the unit of the vram attribute.
2009-12-14 01:25:17 +08:00
<dt><code>model</code></dt>
<dd>
The <code>model</code> element has a mandatory <code>type</code>
docs: Document first release with spice and qxl
2011-03-18 00:04:35 +08:00
attribute which takes the value "vga", "cirrus", "vmvga", "xen",
"vbox", or "qxl" (<span class="since">since 0.8.6</span>)
depending on the hypervisor features available.
Fix and improve domain xml video element description The description mismatched the actual structure since the video element was introduced. The nvram attribute is actually called vram. Specify the unit of the vram attribute.
2009-12-14 01:25:17 +08:00
You can also provide the amount of video memory in kilobytes using
<code>vram</code> and the number of screen with <code>heads</code>.
</dd>
<dt><code>acceleration</code></dt>
<dd>
If acceleration should be enabled (if supported) using the
<code>accel3d</code> and <code>accel2d</code> attributes in the
<code>acceleration</code> element.
</dd>
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
<dt><code>address</code></dt>
<dd>
The optional <code>address</code> sub-element can be used to
tie the video device to a particular PCI slot.
</dd>
Update domain XML docs
2008-05-08 22:20:07 +08:00
</dl>
Add documentation for <channel> domain element * src/formatdomain.html.in: Add <channel> element documentation
2009-11-09 22:38:20 +08:00
<h4><a name="elementsConsole">Consoles, serial, parallel &amp; channel devices</a></h4>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<p>
A character device provides a way to interact with the virtual machine.
Add documentation for <channel> domain element * src/formatdomain.html.in: Add <channel> element documentation
2009-11-09 22:38:20 +08:00
Paravirtualized consoles, serial ports, parallel ports and channels are
all classed as character devices and so represented using the same syntax.
Update domain XML docs
2008-05-08 22:20:07 +08:00
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;parallel type='pty'&gt;
&lt;source path='/dev/pts/2'/&gt;
&lt;target port='0'/&gt;
&lt;/parallel&gt;
&lt;serial type='pty'&gt;
&lt;source path='/dev/pts/3'/&gt;
&lt;target port='0'/&gt;
&lt;/serial&gt;
&lt;console type='pty'&gt;
&lt;source path='/dev/pts/4'/&gt;
&lt;target port='0'/&gt;
&lt;/console&gt;
&lt;channel type='unix'&gt;
&lt;source mode='bind' path='/tmp/guestfwd'/&gt;
&lt;target type='guestfwd' address='10.0.2.1' port='4600'/&gt;
&lt;/channel&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
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<p>
In each of these directives, the top-level element name (parallel, serial,
console, channel) describes how the device is presented to the guest. The
guest interface is configured by the <code>target</code> element.
</p>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
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<p>
The interface presented to the host is given in the <code>type</code>
attribute of the top-level element. The host interface is
configured by the <code>source</code> element.
</p>
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
<p>
Each character device element has an optional
sub-element <code>&lt;address&gt;</code> which can tie the
device to a
particular <a href="#elementsControllers">controller</a> or PCI
slot.
</p>
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
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<h5><a name="elementsCharGuestInterface">Guest interface</a></h5>
<p>
A character device presents itself to the guest as one of the following
types.
</p>
<h6><a name="elementCharParallel">Parallel port</a></h6>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
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<pre>
...
&lt;devices&gt;
&lt;parallel type='pty'&gt;
&lt;source path='/dev/pts/2'/&gt;
&lt;target port='0'/&gt;
&lt;/parallel&gt;
&lt;/devices&gt;
...</pre>
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<p>
<code>target</code> can have a <code>port</code> attribute, which
docs: Serial and parallel device target ports actually start from 0 Reported by Igor Galić
2011-04-10 21:03:42 +08:00
specifies the port number. Ports are numbered starting from 0. There are
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
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usually 0, 1 or 2 parallel ports.
</p>
<h6><a name="elementCharSerial">Serial port</a></h6>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
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<pre>
...
&lt;devices&gt;
&lt;serial type='pty'&gt;
&lt;source path='/dev/pts/3'/&gt;
&lt;target port='0'/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
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<p>
<code>target</code> can have a <code>port</code> attribute, which
docs: Serial and parallel device target ports actually start from 0 Reported by Igor Galić
2011-04-10 21:03:42 +08:00
specifies the port number. Ports are numbered starting from 0. There are
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
usually 0, 1 or 2 serial ports.
</p>
<h6><a name="elementCharConsole">Console</a></h6>
<p>
This represents the primary console. This can be the paravirtualized
qemu: virtio console support Enable specifying a virtio console device with: <console type='pty'> <target type='virtio'/> </console>
2010-07-15 01:02:04 +08:00
console with Xen guests, virtio console for QEMU/KVM, or duplicates
the primary serial port for fully virtualized guests without a
paravirtualized console.
</p>
<p>
A virtio console device is exposed in the
guest as /dev/hvc[0-7] (for more information, see
<a href="http://fedoraproject.org/wiki/Features/VirtioSerial">http://fedoraproject.org/wiki/Features/VirtioSerial</a>)
<span class="since">Since 0.8.3</span>
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
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</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
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<pre>
...
&lt;devices&gt;
&lt;console type='pty'&gt;
&lt;source path='/dev/pts/4'/&gt;
&lt;target port='0'/&gt;
&lt;/console&gt;
qemu: virtio console support Enable specifying a virtio console device with: <console type='pty'> <target type='virtio'/> </console>
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&lt;!-- KVM virtio console --&gt;
&lt;console type='pty'&gt;
&lt;source path='/dev/pts/5'/&gt;
&lt;target type='virtio' port='0'/&gt;
&lt;/console&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;/devices&gt;
...</pre>
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
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<p>
If the console is presented as a serial port, the <code>target</code>
element has the same attributes as for a serial port. There is usually
only 1 console.
</p>
Add documentation for <channel> domain element * src/formatdomain.html.in: Add <channel> element documentation
2009-11-09 22:38:20 +08:00
<h6><a name="elementCharChannel">Channel</a></h6>
<p>
This represents a private communication channel between the host and the
guest.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;channel type='unix'&gt;
&lt;source mode='bind' path='/tmp/guestfwd'/&gt;
&lt;target type='guestfwd' address='10.0.2.1' port='4600'/&gt;
&lt;/channel&gt;
docs: domain: Document virtio <channel> Signed-off-by: Cole Robinson <crobinso@redhat.com>
2010-07-15 03:07:59 +08:00
&lt;!-- KVM virtio channel --&gt;
&lt;channel type='pty'&gt;
&lt;target type='virtio' name='arbitrary.virtio.serial.port.name'/&gt;
&lt;/channel&gt;
spicevmc: support new qemu chardev Inspired by https://bugzilla.redhat.com/show_bug.cgi?id=615757 Add a new character device backend for virtio serial channels that activates the QEMU spice agent on the main channel using the vdagent spicevmc connection. The <target> must be type='virtio', and supports an optional name that specifies how the guest will see the channel (for now, name must be com.redhat.spice.0). <channel type='spicevmc'> <target type='virtio'/> <address type='virtio-serial' controller='1' bus='0' port='3'/> </channel> * docs/schemas/domain.rng: Support new XML. * docs/formatdomain.html.in: Document it. * src/conf/domain_conf.h (virDomainChrType): New enum value. * src/conf/domain_conf.c (virDomainChr): Add spicevmc. (virDomainChrDefParseXML, virDomainChrSourceDefParseXML) (virDomainChrDefParseTargetXML): Parse and enforce proper use. (virDomainChrSourceDefFormat, virDomainChrDefFormat): Format. * src/qemu/qemu_command.c (qemuBuildChrChardevStr) (qemuBuildCommandLine): Add qemu support. * tests/qemuxml2argvtest.c (domain): New test. * tests/qemuxml2argvdata/qemuxml2argv-channel-spicevmc.xml: New file. * tests/qemuxml2argvdata/qemuxml2argv-channel-spicevmc.args: Likewise. Signed-off-by: Eric Blake <eblake@redhat.com>
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&lt;channel type='spicevmc'&gt;
&lt;target type='virtio' name='com.redhat.spice.0'/&gt;
&lt;/channel&gt;
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
&lt;/devices&gt;
...</pre>
Add documentation for <channel> domain element * src/formatdomain.html.in: Add <channel> element documentation
2009-11-09 22:38:20 +08:00
<p>
This can be implemented in a variety of ways. The specific type of
channel is given in the <code>type</code> attribute of the
<code>target</code> element. Different channel types have different
<code>target</code> attributes.
</p>
<dl>
<dt><code>guestfwd</code></dt>
<dd>TCP traffic sent by the guest to a given IP address and port is
forwarded to the channel device on the host. The <code>target</code>
element must have <code>address</code> and <code>port</code> attributes.
<span class="since">Since 0.7.3</span></dd>
docs: domain: Document virtio <channel> Signed-off-by: Cole Robinson <crobinso@redhat.com>
2010-07-15 03:07:59 +08:00
<dt><code>virtio</code></dt>
<dd>Paravirtualized virtio channel. Channel is exposed in the guest under
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
/dev/vport*, and if the optional element <code>name</code> is specified,
docs: domain: Document virtio <channel> Signed-off-by: Cole Robinson <crobinso@redhat.com>
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/dev/virtio-ports/$name (for more info, please see
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
<a href="http://fedoraproject.org/wiki/Features/VirtioSerial">http://fedoraproject.org/wiki/Features/VirtioSerial</a>). The
optional element <code>address</code> can tie the channel to a
particular <code>type='virtio-serial'</code> controller.
docs: domain: Document virtio <channel> Signed-off-by: Cole Robinson <crobinso@redhat.com>
2010-07-15 03:07:59 +08:00
<span class="since">Since 0.7.7</span></dd>
spicevmc: support new qemu chardev Inspired by https://bugzilla.redhat.com/show_bug.cgi?id=615757 Add a new character device backend for virtio serial channels that activates the QEMU spice agent on the main channel using the vdagent spicevmc connection. The <target> must be type='virtio', and supports an optional name that specifies how the guest will see the channel (for now, name must be com.redhat.spice.0). <channel type='spicevmc'> <target type='virtio'/> <address type='virtio-serial' controller='1' bus='0' port='3'/> </channel> * docs/schemas/domain.rng: Support new XML. * docs/formatdomain.html.in: Document it. * src/conf/domain_conf.h (virDomainChrType): New enum value. * src/conf/domain_conf.c (virDomainChr): Add spicevmc. (virDomainChrDefParseXML, virDomainChrSourceDefParseXML) (virDomainChrDefParseTargetXML): Parse and enforce proper use. (virDomainChrSourceDefFormat, virDomainChrDefFormat): Format. * src/qemu/qemu_command.c (qemuBuildChrChardevStr) (qemuBuildCommandLine): Add qemu support. * tests/qemuxml2argvtest.c (domain): New test. * tests/qemuxml2argvdata/qemuxml2argv-channel-spicevmc.xml: New file. * tests/qemuxml2argvdata/qemuxml2argv-channel-spicevmc.args: Likewise. Signed-off-by: Eric Blake <eblake@redhat.com>
2011-02-03 12:09:44 +08:00
<dt><code>spicevmc</code></dt>
<dd>Paravirtualized SPICE channel. The domain must also have a
SPICE server as a <a href="#elementsGraphics">graphics
device</a>, at which point the host piggy-backs messages
across the <code>main</code> channel. The <code>target</code>
element must be present, with
attribute <code>type='virtio'</code>; an optional
attribute <code>name</code> controls how the guest will have
access to the channel, and defaults
to <code>name='com.redhat.spice.0'</code>. The
optional <code>address</code> element can tie the channel to a
particular <code>type='virtio-serial'</code> controller.
<span class="since">Since 0.8.8</span></dd>
Add documentation for <channel> domain element * src/formatdomain.html.in: Add <channel> element documentation
2009-11-09 22:38:20 +08:00
</dl>
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h5><a name="elementsCharHostInterface">Host interface</a></h5>
<p>
A character device presents itself to the host as one of the following
types.
</p>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharSTDIO">Domain logfile</a></h6>
Update domain XML docs
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<p>
This disables all input on the character device, and sends output
into the virtual machine's logfile
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;console type='stdio'&gt;
&lt;target port='1'&gt;
&lt;/console&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharFle">Device logfile</a></h6>
Update domain XML docs
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<p>
A file is opened and all data sent to the character
device is written to the file.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type="file"&gt;
&lt;source path="/var/log/vm/vm-serial.log"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharVC">Virtual console</a></h6>
Update domain XML docs
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<p>
Connects the character device to the graphical framebuffer in
a virtual console. This is typically accessed via a special
hotkey sequence such as "ctrl+alt+3"
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type='vc'&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharNull">Null device</a></h6>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<p>
Connects the character device to the void. No data is ever
provided to the input. All data written is discarded.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type='null'&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharPTY">Pseudo TTY</a></h6>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<p>
A Pseudo TTY is allocated using /dev/ptmx. A suitable client
such as 'virsh console' can connect to interact with the
serial port locally.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type="pty"&gt;
&lt;source path="/dev/pts/3"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<p>
NB special case if &lt;console type='pty'&gt;, then the TTY
fix typos in docs docs/formatdomain.html docs/formatdomain.html.in docs/java.html docs/java.html.in
2008-08-08 18:24:14 +08:00
path is also duplicated as an attribute tty='/dev/pts/3'
Update domain XML docs
2008-05-08 22:20:07 +08:00
on the top level &lt;console&gt; tag. This provides compat
with existing syntax for &lt;console&gt; tags.
</p>
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharHost">Host device proxy</a></h6>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<p>
The character device is passed through to the underlying
physical character device. The device types must match,
eg the emulated serial port should only be connected to
fix typos in docs docs/formatdomain.html docs/formatdomain.html.in docs/java.html docs/java.html.in
2008-08-08 18:24:14 +08:00
a host serial port - don't connect a serial port to a parallel
Update domain XML docs
2008-05-08 22:20:07 +08:00
port.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type="dev"&gt;
&lt;source path="/dev/ttyS0"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharPipe">Named pipe</a></h6>
Fix docs and code disagreements for character devices. The 'pipe' character type wasn't documented. TCP uses a <protocol> element, not <wire> We weren't doing strict validation for protocol and source mode values.
2009-07-09 05:59:23 +08:00
<p>
The character device writes output to a named pipe. See pipe(7) for
more info.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type="pipe"&gt;
&lt;source path="/tmp/mypipe"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Fix docs and code disagreements for character devices. The 'pipe' character type wasn't documented. TCP uses a <protocol> element, not <wire> We weren't doing strict validation for protocol and source mode values.
2009-07-09 05:59:23 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharTCP">TCP client/server</a></h6>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<p>
The character device acts as a TCP client connecting to a
document tcp listen and raw wire option
2009-07-25 04:16:51 +08:00
remote server.
Update domain XML docs
2008-05-08 22:20:07 +08:00
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type="tcp"&gt;
&lt;source mode="connect" host="0.0.0.0" service="2445"/&gt;
&lt;protocol type="raw"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
document tcp listen and raw wire option
2009-07-25 04:16:51 +08:00
<p>
Or as a TCP server waiting for a client connection.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type="tcp"&gt;
&lt;source mode="bind" host="127.0.0.1" service="2445"/&gt;
&lt;protocol type="raw"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
document tcp listen and raw wire option
2009-07-25 04:16:51 +08:00
<p>
esx: Add support for virtual serial device network backing Since version 4.1 ESX(i) can expose virtual serial devices over TCP. Add support in the VMX handling code for this, add test cases to cover it and add links to some documentation. ESX supports two additional protocols: TELNETS and TLS. Add them to the list of serial-over-TCP protocols.
2010-09-30 05:04:19 +08:00
Alternatively you can use <code>telnet</code> instead of <code>raw</code> TCP.
<span class="since">Since 0.8.5</span> you can also use <code>telnets</code>
(secure telnet) and <code>tls</code>.
docs: correct invalid xml * docs/internals.html.in: Fix xml errors. * docs/formatstorageencryption.html.in: Likewise. * docs/drvesx.html.in: Likewise. * docs/archnetwork.html.in: Likewise. * docs/logging.html.in: Likewise. * docs/drvvmware.html.in: Likewise. * docs/api.html.in: Likewise. * docs/formatnwfilter.html.in: Likewise. * docs/formatdomain.html.in: Likewise. * docs/windows.html.in: Likewise.
2011-04-02 06:02:10 +08:00
</p>
document tcp listen and raw wire option
2009-07-25 04:16:51 +08:00
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type="tcp"&gt;
&lt;source mode="connect" host="0.0.0.0" service="2445"/&gt;
&lt;protocol type="telnet"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
...
&lt;serial type="tcp"&gt;
&lt;source mode="bind" host="127.0.0.1" service="2445"/&gt;
&lt;protocol type="telnet"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharUDP">UDP network console</a></h6>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<p>
The character device acts as a UDP netconsole service,
sending and receiving packets. This is a lossy service.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type="udp"&gt;
&lt;source mode="bind" host="0.0.0.0" service="2445"/&gt;
&lt;source mode="connect" host="0.0.0.0" service="2445"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Separate character device doc guest and host parts * docs/formatdomain.html.in: refactors the existing character device documentation to make it explicit which directives configure the guest interface, and which configure the host interface.
2009-11-09 22:35:21 +08:00
<h6><a name="elementsCharUNIX">UNIX domain socket client/server</a></h6>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<p>
The character device acts as a UNIX domain socket server,
accepting connections from local clients.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;serial type="unix"&gt;
&lt;source mode="bind" path="/tmp/foo"/&gt;
&lt;target port="1"/&gt;
&lt;/serial&gt;
&lt;/devices&gt;
...</pre>
Update domain XML docs
2008-05-08 22:20:07 +08:00
Add documentation for <sound> device XML format.
2009-05-19 21:18:00 +08:00
<h4><a name="elementsSound">Sound devices</a></h4>
<p>
A virtual sound card can be attached to the host via the
<code>sound</code> element. <span class="since">Since 0.4.3</span>
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;sound model='es1370'/&gt;
&lt;/devices&gt;
...</pre>
Add documentation for <sound> device XML format.
2009-05-19 21:18:00 +08:00
<dl>
<dt><code>sound</code></dt>
<dd>
The <code>sound</code> element has one mandatory attribute,
<code>model</code>, which specifies what real sound device is emulated.
Valid values are specific to the underlying hypervisor, though typical
qemu: sound: Support intel 'ich6' model In QEMU, the card itself is a PCI device, but it requires a codec (either -device hda-output or -device hda-duplex) to actually output sound. Specifying <sound model='ich6'/> gives us -device intel-hda -device hda-duplex I think it's important that a simple <sound model='ich6'/> sets up a useful codec, to have consistent behavior with all other sound cards. This is basically Dan's proposal of <sound model='ich6'> <codec type='output' slot='0'/> <codec type='duplex' slot='3'/> </sound> without the codec bits implemented. The important thing is to keep a consistent API here, we don't want some <sound> devs require tweaking codecs but not others. Steps I see to accomplishing this: - every <sound> device has a <codec type='default'/> (unless codecs are manually specified) - <codec type='none'/> is required to specify 'no codecs' - new audio settings like mic=on|off could then be exposed in <sound> or <codec> in a consistent manner for all sound models v2: Use model='ich6' v3: Use feature detection, from eblake Set codec id, bus, and cad values v4: intel-hda isn't supported if -device isn't available v5: Comment spelling fixes
2011-01-13 22:15:11 +08:00
choices are 'es1370', 'sb16', 'ac97', and 'ich6'
(<span class="since">
'ac97' only since 0.6.0, 'ich6' only since 0.8.8</span>)
Add documentation for <sound> device XML format.
2009-05-19 21:18:00 +08:00
</dd>
</dl>
docs: document <controller> element * docs/formatdomain.html.in: Talk about <controller> and <address> throughout.
2011-01-18 05:33:00 +08:00
<p>
Each <code>sound</code> element has an optional
sub-element <code>&lt;address&gt;</code> which can tie the
device to a particular PCI slot.
</p>
Support QEMU watchdog device. This adds simple support for configuring a guest with a QEMU/KVM virtual hardware watchdog device.
2009-10-21 20:26:38 +08:00
<h4><a name="elementsWatchdog">Watchdog device</a></h4>
<p>
A virtual hardware watchdog device can be added to the guest via
the <code>watchdog</code> element.
<span class="since">Since 0.7.3, QEMU and KVM only</span>
</p>
<p>
The watchdog device requires an additional driver and management
daemon in the guest. Just enabling the watchdog in the libvirt
configuration does not do anything useful on its own.
</p>
<p>
Currently libvirt does not support notification when the
watchdog fires. This feature is planned for a future version of
libvirt.
</p>
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;watchdog model='i6300esb'/&gt;
&lt;/devices&gt;
...</pre>
Support QEMU watchdog device. This adds simple support for configuring a guest with a QEMU/KVM virtual hardware watchdog device.
2009-10-21 20:26:38 +08:00
docs: Emphasize that devices have to be inside the <devices> element Also cleanup indentation of domain XML examples.
2010-02-04 22:27:52 +08:00
<pre>
...
&lt;devices&gt;
&lt;watchdog model='i6300esb' action='poweroff'/&gt;
&lt;/devices&gt;
&lt;/domain&gt;</pre>
Support QEMU watchdog device. This adds simple support for configuring a guest with a QEMU/KVM virtual hardware watchdog device.
2009-10-21 20:26:38 +08:00
<dl>
<dt><code>model</code></dt>
<dd>
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
<p>
Support QEMU watchdog device. This adds simple support for configuring a guest with a QEMU/KVM virtual hardware watchdog device.
2009-10-21 20:26:38 +08:00
The required <code>model</code> attribute specifies what real
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
watchdog device is emulated. Valid values are specific to the
underlying hypervisor.
</p>
<p>
QEMU and KVM support:
</p>
<ul>
<li> 'i6300esb' &mdash; the recommended device,
emulating a PCI Intel 6300ESB </li>
<li> 'ib700' &mdash; emulating an ISA iBase IB700 </li>
</ul>
Support QEMU watchdog device. This adds simple support for configuring a guest with a QEMU/KVM virtual hardware watchdog device.
2009-10-21 20:26:38 +08:00
</dd>
<dt><code>action</code></dt>
<dd>
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
<p>
Support QEMU watchdog device. This adds simple support for configuring a guest with a QEMU/KVM virtual hardware watchdog device.
2009-10-21 20:26:38 +08:00
The optional <code>action</code> attribute describes what
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
action to take when the watchdog expires. Valid values are
specific to the underlying hypervisor.
</p>
<p>
QEMU and KVM support:
</p>
<ul>
<li>'reset' &mdash; default, forcefully reset the guest</li>
<li>'shutdown' &mdash; gracefully shutdown the guest
(not recommended) </li>
<li>'poweroff' &mdash; forcefully power off the guest</li>
<li>'pause' &mdash; pause the guest</li>
<li>'none' &mdash; do nothing</li>
Update documentation of watchdog dump option and add test data for it The xml watchdog dump option is converted to qemu watchdog pause arg but it is not reasonable to convert it back from qemu watchdog pause arg since there already is a xml watchdog pause option, so a test for the dump option to convert it from arg to xml is not added.
2010-12-10 13:52:11 +08:00
<li>'dump' &mdash; automatically dump the guest
<span class="since">Since 0.8.7</span></li>
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
</ul>
<p>
Update documentation of watchdog dump option and add test data for it The xml watchdog dump option is converted to qemu watchdog pause arg but it is not reasonable to convert it back from qemu watchdog pause arg since there already is a xml watchdog pause option, so a test for the dump option to convert it from arg to xml is not added.
2010-12-10 13:52:11 +08:00
Note 1: the 'shutdown' action requires that the guest
Cleanup whitespace in docs This patch is the result of running the following command in the docs directory: sed -i 's/\t/ /g; s/\s*$//' *.html.in * docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 23:04:19 +08:00
is responsive to ACPI signals. In the sort of situations
where the watchdog has expired, guests are usually unable
to respond to ACPI signals. Therefore using 'shutdown'
is not recommended.
</p>
Update documentation of watchdog dump option and add test data for it The xml watchdog dump option is converted to qemu watchdog pause arg but it is not reasonable to convert it back from qemu watchdog pause arg since there already is a xml watchdog pause option, so a test for the dump option to convert it from arg to xml is not added.
2010-12-10 13:52:11 +08:00
<p>
Note 2: the directory to save dump files can be configured
by <code>auto_dump_path</code> in file /etc/libvirt/qemu.conf.
</p>
Support QEMU watchdog device. This adds simple support for configuring a guest with a QEMU/KVM virtual hardware watchdog device.
2009-10-21 20:26:38 +08:00
</dd>
</dl>
Document the memory balloon device * formatdomain.html.in: Document <memballoon> element
2010-07-21 18:53:56 +08:00
<h4><a name="elementsMemBalloon">Memory balloon device</a></h4>
<p>
A virtual memory balloon device is added to all Xen and KVM/QEMU
guests. It will be seen as <code>memballoon</code> element.
It will be automatically added when appropriate, so there is no
need to explicitly add this element in the guest XML unless a
specific PCI slot needs to be assigned.
<span class="since">Since 0.8.3, Xen, QEMU and KVM only</span>
docs: document how to disable memballoon https://bugzilla.redhat.com/show_bug.cgi?id=623903 documents a qemu bug that causes libvirt to hang if virt-manager happens to be querying balloon info when a guest is paused. Until the qemu bug is fixed, people need to know how to avoid the issue. * docs/formatdomain.html.in (Memory balloon device): Mention model='none'.
2010-10-16 03:34:24 +08:00
Additionally, <span class="since">since 0.8.4</span>, if the
memballoon device needs to be explicitly disabled,
<code>model='none'</code> may be used.
Document the memory balloon device * formatdomain.html.in: Document <memballoon> element
2010-07-21 18:53:56 +08:00
</p>
<p>
Example automatically added device with KVM
</p>
<pre>
...
&lt;devices&gt;
&lt;memballoon model='virtio'/&gt;
&lt;/devices&gt;
...</pre>
<p>
Example manually added device with static PCI slot 2 requested
</p>
<pre>
...
&lt;devices&gt;
&lt;watchdog model='virtio'/&gt;
&lt;address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/&gt;
&lt;/devices&gt;
&lt;/domain&gt;</pre>
<dl>
<dt><code>model</code></dt>
<dd>
<p>
The required <code>model</code> attribute specifies what type
maint: whitespace cleanup * .dir-locals.el (html-mode): Let emacs help out. * cfg.mk (sc_TAB_in_indentation): Check more files. * docs/internals/command.html.in: Fix offenders. * docs/formatdomain.html.in: Likewise. * docs/internals.html.in: Likewise. Reported by Jiri Denemark.
2011-02-05 02:16:35 +08:00
of balloon device is provided. Valid values are specific to
the virtualization platform
Document the memory balloon device * formatdomain.html.in: Document <memballoon> element
2010-07-21 18:53:56 +08:00
</p>
<ul>
<li>'virtio' &mdash; default with QEMU/KVM</li>
<li>'xen' &mdash; default with Xen</li>
</ul>
</dd>
</dl>
Update domain XML docs
2008-05-08 22:20:07 +08:00
<h2><a name="examples">Example configs</a></h2>
Split website out into one file per page. APply new layout and styling
2008-04-24 01:08:31 +08:00
<p>
Example configurations for each driver are provide on the
driver specific pages listed below
</p>
<ul>
<li><a href="drvxen.html#xmlconfig">Xen examples</a></li>
<li><a href="drvqemu.html#xmlconfig">QEMU/KVM examples</a></li>
</ul>
</body>
</html>