Dear libvirt users, I'm stuck on this subject and would appreciate a
working example as this looks a supported feature :)
After many tries and packages backports, here is my current setup:
qemu 2.5
libvirt 3.0
ceph hammer
on Debian jessie.
Here is the relevent domain xml parts:
<disk type='network' device='disk'
snapshot='internal'>
<driver name='qemu' type='raw'/>
<auth username='libvirt'>
<secret type='ceph' uuid='xxxxxxxxxxxxxxxx'/>
</auth>
<source protocol='rbd' name='libvirt-pool/vm-test'>
<host name='192.168.253.1' port='6789'/>
<host name='192.168.253.3' port='6789'/>
<host name='192.168.253.254' port='6789'/>
<snapshot name='backup'/>
</source>
<backingStore/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x0'/>
</disk>
After several tries, I discovered the snapshot option in source tag, and
that I need to pre-create this snapshot using rbd so the vm can start.
But then I tried:
# virsh snapshot-create-as vm-test
error: unsupported configuration: internal snapshot for disk vda
unsupported for storage type raw
# virsh snapshot-create-as vm-test snap1 --memspec file=/tmp/vm-test.mem
--diskspec vda,snapshot=internal
error: unsupported configuration: internal snapshot for disk vda
unsupported for storage type raw
# virsh snapshot-create-as vm-test snap1 --disk-only --atomic --diskspec
vda,snapshot=internal
error: unsupported configuration: active qemu domains require external
disk snapshots; disk vda requested internal
and some other test, without any success:(
What I just would like to achieve is to do a consistent disk snapshot of
the VM without VM shutdown (suspend is ok) and using virsh as this seems
supported (I can manually run rbd snap create, I know). And if possible
whol mem+disk consistent snapshot without downtime :)
Any hint to make this working, as anyone out ther having succes in such
process?
