[Rdo-list] Instance auto resume after compute node restart

Chris contact at progbau.de
Sat May 2 07:13:40 UTC 2015


We want to have instances auto resume their status after a compute node 
reboot/failure. Means when the VM has the running state before it should 
be automatically started. We are using Icehouse.

There is the option resume_guests_state_on_host_boot=true|false which 
should exactly do what we want:
# Whether to start guests that were running before the host
# rebooted (boolean value)

I tried it out and it just didn’t work. Libvirt fails to start the VMs 
because I couldn’t find the interfaces:
2015-04-30 06:16:00.783+0000: 3091: error : virNetDevGetMTU:343 : Cannot 
get interface MTU on 'qbr62d7e489-f8': No such device
2015-04-30 06:16:00.897+0000: 3091: warning : qemuDomainObjStart:6144 : 
Unable to restore from managed state 
/var/lib/libvirt/qemu/save/instance-0000025f.save. Maybe the file is 

I did some research and found some corresponding experiences from other 
“AFAIK at the present time OpenStack (Icehouse) still not completely 
aware about environments inside it, so it can't restore completely after 

Is this feature really broken or do I just miss something?

Thanks in advance!


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