mirror of https://gitee.com/openkylin/libvirt.git
246 lines
9.0 KiB
XML
246 lines
9.0 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<body>
|
|
<h1>Secret XML format</h1>
|
|
|
|
<ul id="toc"></ul>
|
|
|
|
<h2><a name="SecretAttributes">Secret XML</a></h2>
|
|
|
|
<p>
|
|
Secrets stored by libvirt may have attributes associated with them, using
|
|
the <code>secret</code> element. The <code>secret</code> element has two
|
|
optional attributes, each with values '<code>yes</code>' and
|
|
'<code>no</code>', and defaulting to '<code>no</code>':
|
|
</p>
|
|
<dl>
|
|
<dt><code>ephemeral</code></dt>
|
|
<dd>This secret must only be kept in memory, never stored persistently.
|
|
</dd>
|
|
<dt><code>private</code></dt>
|
|
<dd>The value of the secret must not be revealed to any caller of libvirt,
|
|
nor to any other node.
|
|
</dd>
|
|
</dl>
|
|
<p>
|
|
The top-level <code>secret</code> element may contain the following
|
|
elements:
|
|
</p>
|
|
<dl>
|
|
<dt><code>uuid</code></dt>
|
|
<dd>
|
|
An unique identifier for this secret (not necessarily in the UUID
|
|
format). If omitted when defining a new secret, a random UUID is
|
|
generated.
|
|
</dd>
|
|
<dt><code>description</code></dt>
|
|
<dd>A human-readable description of the purpose of the secret.
|
|
</dd>
|
|
<dt><code>usage</code></dt>
|
|
<dd>
|
|
Specifies what this secret is used for. A mandatory
|
|
<code>type</code> attribute specifies the usage category, currently
|
|
only <code>volume</code>, <code>ceph</code> and <code>iscsi</code>
|
|
are defined. Specific usage categories are described below.
|
|
</dd>
|
|
</dl>
|
|
|
|
<h3><a name="VolumeUsageType">Usage type "volume"</a></h3>
|
|
|
|
<p>
|
|
This secret is associated with a volume, and it is safe to delete the
|
|
secret after the volume is deleted. The <code><usage
|
|
type='volume'></code> element must contain a
|
|
single <code>volume</code> element that specifies the key of the volume
|
|
this secret is associated with. For example, create a volume-secret.xml
|
|
file as follows:
|
|
</p>
|
|
|
|
<pre>
|
|
<secret ephemeral='no' private='yes'>
|
|
<description>Super secret name of my first puppy</description>
|
|
<uuid>0a81f5b2-8403-7b23-c8d6-21ccc2f80d6f</uuid>
|
|
<usage type='volume'>
|
|
<volume>/var/lib/libvirt/images/puppyname.img</volume>
|
|
</usage>
|
|
</secret>
|
|
</pre>
|
|
|
|
<p>
|
|
Define the secret and set the pass phrase as follows:
|
|
</p>
|
|
<pre>
|
|
# virsh secret-define volume-secret.xml
|
|
Secret 0a81f5b2-8403-7b23-c8d6-21ccc2f80d6f created
|
|
#
|
|
# MYSECRET=`printf %s "open sesame" | base64`
|
|
# virsh secret-set-value 0a81f5b2-8403-7b23-c8d6-21ccc2f80d6f $MYSECRET
|
|
Secret value set
|
|
#
|
|
</pre>
|
|
|
|
<p>
|
|
The volume type secret can then be used in the XML for a storage volume
|
|
<a href="formatstorageencryption.html">encryption</a> as follows:
|
|
</p>
|
|
<pre>
|
|
<encryption format='qcow'>
|
|
<secret type='passphrase' uuid='0a81f5b2-8403-7b23-c8d6-21ccc2f80d6f'/>
|
|
</encryption>
|
|
</pre>
|
|
|
|
<h3><a name="CephUsageType">Usage type "ceph"</a></h3>
|
|
<p>
|
|
This secret is associated with a Ceph RBD (rados block device).
|
|
The <code><usage type='ceph'></code> element must contain
|
|
a single <code>name</code> element that specifies a usage name
|
|
for the secret. The Ceph secret can then be used by UUID or by
|
|
this usage name via the <code><auth></code> element of
|
|
a <a href="formatdomain.html#elementsDisks">disk device</a> or
|
|
a <a href="formatstorage.html">storage pool (rbd)</a>.
|
|
<span class="since">Since 0.9.7</span>. The following is an example
|
|
of the steps to be taken. First create a ceph-secret.xml file:
|
|
</p>
|
|
|
|
<pre>
|
|
<secret ephemeral='no' private='yes'>
|
|
<description>CEPH passphrase example</description>
|
|
<usage type='ceph'>
|
|
<name>ceph_example</name>
|
|
</usage>
|
|
</secret>
|
|
</pre>
|
|
|
|
<p>
|
|
Next, use <code>virsh secret-define ceph-secret.xml</code> to define
|
|
the secret and <code>virsh secret-set-value</code> using the generated
|
|
UUID value and a base64 generated secret value in order to define the
|
|
chosen secret pass phrase.
|
|
</p>
|
|
<pre>
|
|
# virsh secret-define ceph-secret.xml
|
|
Secret 1b40a534-8301-45d5-b1aa-11894ebb1735 created
|
|
#
|
|
# virsh secret-list
|
|
UUID Usage
|
|
-----------------------------------------------------------
|
|
1b40a534-8301-45d5-b1aa-11894ebb1735 cephx ceph_example
|
|
#
|
|
# CEPHPHRASE=`printf %s "pass phrase" | base64`
|
|
# virsh secret-set-value 1b40a534-8301-45d5-b1aa-11894ebb1735 $CEPHPHRASE
|
|
Secret value set
|
|
|
|
#
|
|
</pre>
|
|
|
|
<p>
|
|
The ceph secret can then be used by UUID or by the
|
|
usage name via the <code><auth></code> element in a domain's
|
|
<a href="formatdomain.html#elementsDisks"><code><disk></code></a>
|
|
element as follows:
|
|
</p>
|
|
<pre>
|
|
<auth username='myname'>
|
|
<secret type='ceph' usage='ceph_example'/>
|
|
</auth>
|
|
</pre>
|
|
|
|
<p>
|
|
As well as the <code><auth></code> element in a
|
|
<a href="formatstorage.html">storage pool (rbd)</a>
|
|
<code><source></code> element as follows:
|
|
</p>
|
|
<pre>
|
|
<auth type='ceph' username='myname'>
|
|
<secret usage='ceph_example'/>
|
|
</auth>
|
|
</pre>
|
|
|
|
<h3><a name="iSCSIUsageType">Usage type "iscsi"</a></h3>
|
|
|
|
<p>
|
|
This secret is associated with an iSCSI target for CHAP authentication.
|
|
The <code><usage type='iscsi'></code> element must contain
|
|
a single <code>target</code> element that specifies a usage name
|
|
for the secret. The iSCSI secret can then be used by UUID or by
|
|
this usage name via the <code><auth></code> element of
|
|
a <a href="formatdomain.html#elementsDisks">disk device</a> or
|
|
a <a href="formatstorage.html">storage pool (iscsi)</a>.
|
|
<span class="since">Since 1.0.4</span>. The following is an example
|
|
of the XML that may be used to generate a secret for iSCSI CHAP
|
|
authentication. Assume the following sample entry in an iSCSI
|
|
authentication file:
|
|
</p>
|
|
<pre>
|
|
<target iqn.2013-07.com.example:iscsi-pool>
|
|
backing-store /home/tgtd/iscsi-pool/disk1
|
|
backing-store /home/tgtd/iscsi-pool/disk2
|
|
incominguser myname mysecret
|
|
</target>
|
|
</pre>
|
|
<p>
|
|
Define an iscsi-secret.xml file to describe the secret. Use the
|
|
<code>incominguser</code> username used in your iSCSI authentication
|
|
configuration file as the value for the <code>username</code> attribute.
|
|
The <code>description</code> attribute should contain configuration
|
|
specific data. The <code>target</code> name may be any name of your
|
|
choosing to be used as the <code>usage</code> when used in the pool
|
|
or disk XML description.
|
|
</p>
|
|
<pre>
|
|
<secret ephemeral='no' private='yes'>
|
|
<description>Passphrase for the iSCSI example.com server</description>
|
|
<usage type='iscsi'>
|
|
<target>libvirtiscsi</target>
|
|
</usage>
|
|
</secret>
|
|
</pre>
|
|
|
|
<p>
|
|
Next, use <code>virsh secret-define iscsi-secret.xml</code> to define
|
|
the secret and <code>virsh secret-set-value</code> using the generated
|
|
UUID value and a base64 generated secret value in order to define the
|
|
chosen secret pass phrase. The pass phrase must match the password
|
|
used in the iSCSI authentication configuration file.
|
|
</p>
|
|
<pre>
|
|
# virsh secret-define secret.xml
|
|
Secret c4dbe20b-b1a3-4ac1-b6e6-2ac97852ebb6 created
|
|
|
|
# virsh secret-list
|
|
UUID Usage
|
|
-----------------------------------------------------------
|
|
c4dbe20b-b1a3-4ac1-b6e6-2ac97852ebb6 iscsi libvirtiscsi
|
|
|
|
# MYSECRET=`printf %s "mysecret" | base64`
|
|
# virsh secret-set-value c4dbe20b-b1a3-4ac1-b6e6-2ac97852ebb6 $MYSECRET
|
|
Secret value set
|
|
#
|
|
</pre>
|
|
|
|
<p>
|
|
The iSCSI secret can then be used by UUID or by the
|
|
usage name via the <code><auth></code> element in a domain's
|
|
<a href="formatdomain.html#elementsDisks"><code><disk></code></a>
|
|
element as follows:
|
|
</p>
|
|
<pre>
|
|
<auth username='myname'>
|
|
<secret type='iscsi' usage='libvirtiscsi'/>
|
|
</auth>
|
|
</pre>
|
|
|
|
<p>
|
|
As well as the <code><auth></code> element in a
|
|
<a href="formatstorage.html">storage pool (iscsi)</a>
|
|
<code><source></code> element as follows:
|
|
</p>
|
|
<pre>
|
|
<auth type='chap' username='myname'>
|
|
<secret usage='libvirtiscsi'/>
|
|
</auth>
|
|
</pre>
|
|
</body>
|
|
</html>
|