Re: [Libvir] ISCSI howto, example, etc?
On Tue, May 06, 2008 at 12:50:25AM -0600, Mark Dehus wrote:
The documentation on the new storage feature is either a little
short,
or I totally missed it. Anyway, I am looking for some help on how to
use it. If anyone could maybe give me an example xml file that would
be incredibly helpful, because based on the format description I can't
exactly figure out what information I am supposed to put where (for
ISCSI).
The main docs we have are
http://libvirt.org/formatstorage.html
http://libvirt.org/storage.html
They are basically more reference guides that howto/tutorials. Also
look at the 'virsh help' output for 'vol-XXX' and 'pool-XXX'
commands.
As a simple example...
- Create an XML definition for the iSCSI target you want to access,
# cat > virt.xml <<EOF
<pool type="iscsi">
<name>virtimages</name>
<source>
<host name="iscsi.example.com"/>
<device path="demo-target"/>
</source>
<target>
<path>/dev/disk/by-path</path>
</target>
</pool>
EOF
- Define the pool
# virsh pool-define virt.xml
- Activate the pool (this step logs into the server)
# virsh pool-start virtimages
- List the LUNs available
# virsh vol-list virtimages
- Query info about a LUN
# virsh vol-info --pool virtimages lun-3
# virsh vol-dumpxml --pool virtimages lun-3
There's many more pool-XXX and vol-XX commands available
Regards,
Dan.
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