[Bug 595388] Re: starting kvm guests with libvirt on virthost startup doesn't wait till all dependencies are available

[Lars]

Hi!

Yes, the vms is configured to be started automatically by libvirtd.

The aoetool start script only loads the module. I don't mount any aoe
device, because it is used directly by the vm.

You're right the best solution would be to enhance libvirtd to check all prerequisites for each vm before starting it.
But sadly I had no time to wait for this to be realised. And I'm not skilled enough to do this myself.

So my solution was to enhance the upstart script in this way:

pre-start script
        mkdir -p /var/run/libvirt
        # Clean up a pidfile that might be left around
        rm -f /var/run/libvirtd.pid

        AOE=$(aoe-stat | wc -l)
        until [ $AOE -gt 0 ]
        do
            sleep 1
            AOE=$(aoe-stat | wc -l)
        done
end script


This pre-start script waits till at least one aoe device is accessible.

Thanks and kind regards
Lars

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starting kvm guests with libvirt on virthost startup doesn't wait till all dependencies are available
https://bugs.launchpad.net/bugs/595388
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