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

Chris contact at progbau.de
Thu Apr 30 07:06:09 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 reboot."



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


Thanks in advance!




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