[Pacemaker] RFC: Compacting constraints

[Dejan Muhamedagic]

Hi,

On Fri, 30 Oct 2009 11:05 +0100, "Lars Marowsky-Bree" <lmb at suse.de>
wrote:
> On 2009-10-29T16:24:08, Dejan Muhamedagic <dejanmm at fastmail.fm> wrote:
> 
> > > There's a bunch of open issues (resource_sets not supporting score="0",
> > > the crm shell not supporting resource_sets at all),
> > That's on the todo list, I've even started working on it, but then had
> > an issue with funny way resource sets are constructed in CIB. We had a
> > discussion about that last year.
> 
> Can you remind me/us please? Maybe we can fix some of the details still.
> I admit I can't find the discussion from last year any more,
> unfortunately.
> 
> In particular the rsc_order support for resource sets doesn't just not
> support score="", but also not the for/then action bits, which I think
> might be extremely useful if I want to order several resources after a
> master promotion; this also applies to collocation (and I also can't
> collocate several resources with a node attribute).
> 
> So I think the rsc sets still need a bit of fixing.

That'd be great. I'll dig the discussion (should be somewhere) and
produce
a digest.

> > There are no shell constructs which are rendered as two or more CIB
> > elements. I guess that this should be possible, but really can't say
> > until I take a thorough look at the implementation.
> 
> That'd be cool. This would be much within the spirit of the CIB
> representing atomic objects and management tools providing higher-level
> abstraction.

Agreed.

> > BTW, I guess that there are other CIB phrases which are commonly in
> > use.
> 
> Right, but I think the "order A after B; collocation B with A" is likely
> the most common expression; we've got to start somewhere ;-)

Groups :) It's just that ms resources can't belong to a group.

Thanks,

Dejan

> 
> Regards,
>     Lars
> 
> -- 
> Architect Storage/HA, OPS Engineering, Novell, Inc.
> SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)
> "Experience is the name everyone gives to their mistakes." -- Oscar Wilde
> 
> 
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