[Linux-cluster] Questions about rgmanager

[brem belguebli]

thx Lon

2009/8/18 Lon Hohberger <lhh at redhat.com>

> On Tue, 2009-08-18 at 11:01 +0200, brem belguebli wrote:
> > Hello,
> >
> > I have a few questions about rgmanager:
> >
> > 1) How to make it take into account resource metadata changes without
> > restarting it. service rgmanager reload (or kill -HUP) doesn't.
> >     In case one needs to change some timers in a resource metadata,
> > the only way to make it is to stop and start rgmanager which brings
> > down the resources.
>
> Need to change the configuration version in cluster.conf; rgmanager
> doesn't record for example file mtimes and run stat() to see if metadata
> changed.  Doing this wouldn't work anyway, as some resources have
> external metadata.
>
> > 2) Is there a way to log what "rules" rgmanager succeded to load at
> > start time (or the ones it failed to), as having a "24 rules loaded"
> > message isn't very explicit.
>
> You can run:
>
>   rg_test rules | grep ^Agent
>
> There's no way currently to have rgmanager log specifically which agent
> it loaded at run-time.
>
> > The last point concerns the potential replacement of rgmanager with
> > pacemaker (as stated at
> > http://sources.redhat.com/cluster/wiki/RGManager). Will this happen in
> > a near future ?
>
> Not immediately; we still have a bit to go:
>
> * need configuration file format conversion utility
> * need basic "work-alike" tools.  Ex: clustat.
> * need to do a bit of work on rgmanager agents so they work
>  on pacemaker - the standard by which rgmanager+pacemaker
>  operate was inadequate and the two programs have diverged
>  in slightly incompatible ways
>
> -- Lon
>
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