Hi,
Well, can you do it manually on the same configuration? It should be
easy to verify.
I've tried to do it manually:
# virsh snapshot-create one-5
error: unsupported configuration: internal checkpoints require at least
one disk to be selected for snapshot
Asking the libvirt ML leads to this answer:
An internal snapshot of a VM requires that the VM has at least one disk
using a QCOW2 volume or similar. The memory state is saved in that
image. Your VM has only a RAW disk image and thus it can't be used for
internal snapshot.
You can either use an external snapshot (the memory image is stored
separately), but the support for external snapshots isn't finished yet
(they can't be reverted automatically).
The second option is to convert your VM to a qcow2 image file..
And later:
How can I create an external snapshot?
Add '--disk-only' for an offline domain, or use 'virsh
snapshot-create-as --memspec' instead of 'snapshot-create' for an
online
guest (you can also use snapshot-create for an external snapshot, but
you have to write appropriate XML for the case, rather than relying on
the no-arg option that provides a default XML for an internal snapshot;
so I find snapshot-create-as a lot easier to work with).
Internal snapshots require qcow2 (or the less-used qed) file format,
full stop. If you want your snapshots to live on RBD storage backend,
then you either layer the qcow2 file on top of that backend, or you use
external snapshots.
Some system information:
* Ubuntu 13.04 64Bit
* virsh --version: 1.0.2
* OpenNebula version 4.2
* The XML of the VM is below
Does anyone have snapshots running using RBD?
Cheers,
Tobias
<domain type='kvm' id='4'>
<name>one-5</name>
<uuid>cff38c6a-2996-7709-c4f4-0ed826c2fb02</uuid>
<memory unit='KiB'>524288</memory>
<currentMemory unit='KiB'>524288</currentMemory>
<vcpu placement='static'>1</vcpu>
<cputune>
<shares>1024</shares>
</cputune>
<os>
<type arch='x86_64' machine='pc-i440fx-1.4'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='network' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<source protocol='rbd' name='one/one-5-5-0'/>
<target dev='hda' bus='ide'/>
<alias name='ide0-0-0'/>
<address type='drive' controller='0' bus='0' target='0'
unit='0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<source file='/var/lib/one//datastores/0/5/disk.1'/>
<target dev='hdb' bus='ide'/>
<readonly/>
<alias name='ide0-0-1'/>
<address type='drive' controller='0' bus='0' target='0'
unit='1'/>
</disk>
<controller type='ide' index='0'>
<alias name='ide0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x1'/>
</controller>
<controller type='usb' index='0'>
<alias name='usb0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x2'/>
</controller>
<interface type='bridge'>
<mac address='02:00:c0:a8:31:97'/>
<source bridge='vmbr0'/>
<virtualport type='openvswitch'>
<parameters
interfaceid='6e492227-cd8b-f472-9f3d-1161ddf9ecfc'/>
</virtualport>
<target dev='vnet0'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='5905' autoport='no' listen='0.0.0.0'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<video>
<model type='cirrus' vram='9216' heads='1'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='apparmor' relabel='yes'>
<label>libvirt-cff38c6a-2996-7709-c4f4-0ed826c2fb02</label>
<imagelabel>libvirt-cff38c6a-2996-7709-c4f4-0ed826c2fb02</imagelabel>
</seclabel>
</domain>
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