[Pacemaker] Upstart resources

Andrew Beekhof andrew at beekhof.net
Thu Feb 23 17:52:49 EST 2012

On Thu, Feb 23, 2012 at 6:43 PM, Ante Karamatic <ivoks at ubuntu.com> wrote:
> On 23.02.2012 07:57, Vladislav Bogdanov wrote:
>> Thanks for clarification, that wasn't clear at the moment I looked at
>> it. If I knew that, I wouldn't write that RA. One remark, my RA has
>> possibility to check service aliveness on monitor operation and repair
>> that service if it hangs.
> Well... Upstart actually does notice if the job failed and respawns it -
> depending on job's configuration.

Actually this is /really/ bad as it subverts our recovery policies.
Restarting on the local machine is not the only option.

For systemd we have asked for a way to programatically disable the
automated respawning.

Although I can't stop it, individual agents shouldn't be doing this either.

> Monitoring cluster resource, in this
> case, should just return 'running' or 'not running'. It's up to the lrmd
> to restart the resource if it's not running. Restarting the resource
> within the 'monitor' doesn't look like the best way to do it? It somehow
> doesn't fit into the 'monitor' function and you lose some of the
> functionality when you don't report the problem to the lrmd (allowed
> number of restarts; what to do if monitor fails, etc...).
>> I use it for libvirtd which sometimes become
>> unresponsive so I need to restart it before all other libvirt-related
>> resources begin to fail. Fortunately, modern libvirtd can be restarted
>> without affecting guests. Of course, that is just a hack, and that
>> should be fixed in libvirtd, but we live in a real world...
> You can prevent other resources from restarting by adjusting
> constraints. But this really depends on your setup. For some time
> running libvirtd is not a requirement for running a VM. I don't recall
> VMs ever failing if libvirt restarted.
> Best regards
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