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

[Chris]

Hello,

 

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)

resume_guests_state_on_host_boot=true

 

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
corrupted?

 

I did some research and found some corresponding experiences from other
users:

"AFAIK at the present time OpenStack (Icehouse) still not completely aware
about environments inside it, so it can't restore completely after reboot."

Source:
http://stackoverflow.com/questions/23150148/how-to-get-instances-back-after-
reboot-in-openstack

 

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

 

Thanks in advance!

 

Cheers

Chris

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