[Bug 985489] Re: nova-compute stops processing compute.$HOSTNAME occasionally

[Rafi Khardalian]

We ran into this issue as well and as you have correctly stated, it's a
result of libvirtd becoming unresponsive.  Thus far we have not been
able to resolve the issue at its core but I can offer you a workaround.

It's a simple script which calls virsh help (which will block
indefinitely when the libvirtd process is unresponsive), wait 30 seconds
for a response and restart libvirtd after the timeout has elapsed.  Run
it out of cron every 5 minutes or whatever you're comfortable doing.

https://github.com/metacloud/openstack-
tools/blob/master/libvirt/check_fix_libvirtd

By no means is this a fix but it'll mitigate the issue for you
operationally for now.  In every situation we've had the script trigger,
nova-compute recovers as you would expect, without needing a restart.

Hope that helps.

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https://bugs.launchpad.net/bugs/985489

Title:
  nova-compute stops processing compute.$HOSTNAME occasionally

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