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qemu: Document GlusterFS block driver usage 

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Bharata B Rao 2012-10-24 17:17:53 +05:30 committed by Kevin Wolf
parent ce34cf72fe
commit 8809e28937
2 changed files with 66 additions and 0 deletions
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49
qemu-doc.texi
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@ -421,6 +421,7 @@ snapshots.
* disk_images_nbd:: NBD access
* disk_images_sheepdog:: Sheepdog disk images
* disk_images_iscsi:: iSCSI LUNs
* disk_images_gluster:: GlusterFS disk images
@end menu
@node disk_images_quickstart
@ -814,7 +815,55 @@ qemu-system-i386 -iscsi initiator-name=iqn.qemu.test:my-initiator \
-cdrom iscsi://127.0.0.1/iqn.qemu.test/2
@end example
@node disk_images_gluster
@subsection GlusterFS disk images
GlusterFS is an user space distributed file system.
You can boot from the GlusterFS disk image with the command:
@example
qemu-system-x86_64 -drive file=gluster[+@var{transport}]://[@var{server}[:@var{port}]]/@var{volname}/@var{image}[?socket=...]
@end example
@var{gluster} is the protocol.
@var{transport} specifies the transport type used to connect to gluster
management daemon (glusterd). Valid transport types are
tcp, unix and rdma. If a transport type isn't specified, then tcp
type is assumed.
@var{server} specifies the server where the volume file specification for
the given volume resides. This can be either hostname, ipv4 address
or ipv6 address. ipv6 address needs to be within square brackets [ ].
If transport type is unix, then @var{server} field should not be specifed.
Instead @var{socket} field needs to be populated with the path to unix domain
socket.
@var{port} is the port number on which glusterd is listening. This is optional
and if not specified, QEMU will send 0 which will make gluster to use the
default port. If the transport type is unix, then @var{port} should not be
specified.
@var{volname} is the name of the gluster volume which contains the disk image.
@var{image} is the path to the actual disk image that resides on gluster volume.
You can create a GlusterFS disk image with the command:
@example
qemu-img create gluster://@var{server}/@var{volname}/@var{image} @var{size}
@end example
Examples
@example
qemu-system-x86_64 -drive file=gluster://1.2.3.4/testvol/a.img
qemu-system-x86_64 -drive file=gluster+tcp://1.2.3.4/testvol/a.img
qemu-system-x86_64 -drive file=gluster+tcp://1.2.3.4:24007/testvol/dir/a.img
qemu-system-x86_64 -drive file=gluster+tcp://[1:2:3:4:5:6:7:8]/testvol/dir/a.img
qemu-system-x86_64 -drive file=gluster+tcp://[1:2:3:4:5:6:7:8]:24007/testvol/dir/a.img
qemu-system-x86_64 -drive file=gluster+tcp://server.domain.com:24007/testvol/dir/a.img
qemu-system-x86_64 -drive file=gluster+unix:///testvol/dir/a.img?socket=/tmp/glusterd.socket
qemu-system-x86_64 -drive file=gluster+rdma://1.2.3.4:24007/testvol/a.img
@end example
@node pcsys_network
@section Network emulation

17
qemu-options.hx
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@ -2054,6 +2054,23 @@ qemu-system-i386 --drive file=sheepdog:192.0.2.1:30000:MyVirtualMachine
See also @url{http://http://www.osrg.net/sheepdog/}.
@item GlusterFS
GlusterFS is an user space distributed file system.
QEMU supports the use of GlusterFS volumes for hosting VM disk images using
TCP, Unix Domain Sockets and RDMA transport protocols.
Syntax for specifying a VM disk image on GlusterFS volume is
@example
gluster[+transport]://[server[:port]]/volname/image[?socket=...]
@end example
Example
@example
qemu-system-x86_84 --drive file=gluster://192.0.2.1/testvol/a.img
@end example
See also @url{http://www.gluster.org}.
@end table
ETEXI