[one-users] Fwd: OpenVswitch and host crash

[Jaime Melis]

Hi Daniel,

I feel it's best not to trigger automatic recovery actions when a host
fails. The complexity of developing heuristics to deal with all the
technologies OpenNebula leverages would be enormous. And the commands you
had to run in this particular case might change in future Open vSwitch
releases...

That said, I would personally do this outside of OpenNebula, in an rc.local
sort of place. But if you really want to do this within OpenNebula you can
always create a probe that is executed with all the other IM actions, that
checks if Open vSwitch is up and healthy, and otherwise fixes it.

cheers,
Jaime

On Mon, Oct 13, 2014 at 10:02 AM, Daniel Dehennin <
daniel.dehennin at baby-gnu.org> wrote:

> Hello,
>
> We had a power failure on a test ONE 4.8, the frontend and the two hosts
> crashed.
>
> I can not resume nor boot the powered off VMs, libvirt told me:
>
>
>     error : virNetDevOpenvswitchRemovePort:187 : Unable to delete port
> (null) from OVS: Operation not permitted
>     error : virCommandWait:2426 : internal error: Child process (ovs-vsctl
>         --timeout=5 -- --may-exist add-port inetrnal vnet0 -- set Interface
>         vnet0 'external-ids:attached-mac="02:00:c0:a8:00:6e"' -- set
>         Interface vnet0
>         'external-ids:iface-id="2a9321ad-2b7e-4ca5-9c81-a3f54d04807b"' --
>         set Interface vnet0
>         'external-ids:vm-id="c486c111-e3fe-4338-99b0-8eed4c043cff"' -- set
>         Interface vnet0 external-ids:iface-status=active) unexpected exit
>         status 1: ovs-vsctl: "--may-exist add-port internal vnet0" but
> vnet0
>         is actually attached to bridge external
>
>
> To come back to normal, I had to run the following command:
>
>     for switch in external internal
>     do
>         for port in $(ovs-vsctl list-ports $switch | grep '^vnet')
>         do
>             ovs-vsctl del-port $switch $port
>         done
>     done
>
> Any idea to perform such operation automatically after a recovery?
>
> Regards.
> --
> Daniel Dehennin
> Récupérer ma clef GPG: gpg --recv-keys 0xCC1E9E5B7A6FE2DF
> Fingerprint: 3E69 014E 5C23 50E8 9ED6  2AAD CC1E 9E5B 7A6F E2DF
>
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>


-- 
Jaime Melis
Project Engineer
OpenNebula - Flexible Enterprise Cloud Made Simple
www.OpenNebula.org | jmelis at opennebula.org
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