[ClusterLabs] VirtualDomain & "deeper" monitors - what/how?

[Ken Gaillot]

On Fri, 2021-04-30 at 15:56 +0000, Strahil Nikolov wrote:
> Hey Ken,
> 
> does this feature work for other Nagios stuff ?
> 
> Best Regards,
> Strahil Nikolov

Any nagios plugin can be used as a nagios: resource.

The container meta-attribute can be used with any resources, but it
only makes sense if restarting whatever resource is listed as the
container can make the dependent resource OK again.

> 
> > On Fri, Apr 30, 2021 at 17:57, Ken Gaillot
> > <kgaillot at redhat.com> wrote:
> > On Fri, 2021-04-30 at 11:00 +0100, lejeczek wrote:
> > > Hi guys
> > > 
> > > I'd like to ask around for thoughts & suggestions on any 
> > > semi/official ways to monitor VirtualDomain.
> > > Something beyond what included RA does - such as actual 
> > > health testing of and communication with VM's OS.
> > > 
> > > many thanks, L.
> > 
> > This use case led to a Pacemaker feature many moons ago ...
> > 
> > Pacemaker supports nagios plug-ins as a resource type (e.g.
> > nagios:check_apache_status). These are service checks usually used
> > with
> > monitoring software such as nagios, icinga, etc.
> > 
> > If the service being monitored is inside a VirtualDomain, named vm1
> > for
> > example, you can configure the nagios resource with the resource
> > meta-
> > attribute container="vm1". If the nagios check fails, Pacemaker
> > will
> > restart vm1.
> > 
> > (This feature was added before OS containers became popular, so the
> > naming is a bit unfortunate.)
> > -- 
> > Ken Gaillot <kgaillot at redhat.com>
> > 
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-- 
Ken Gaillot <kgaillot at redhat.com>