[Pacemaker] Shouldn't colocation -inf: be mandatory?

[Andreas Kurz]

On Tuesday 15 June 2010 08:40:58 Andrew Beekhof wrote:
> On Mon, Jun 14, 2010 at 4:22 PM, Vadym Chepkov <vchepkov at gmail.com> wrote:
> > On Jun 7, 2010, at 8:04 AM, Vadym Chepkov wrote:
> >> I filed bug 2435, glad to hear "it's not me"
> >
> > Andrew closed this bug
> > (http://developerbugs.linux-foundation.org/show_bug.cgi?id=2435) as
> > resolved, but I respectfully disagree.
> >
> > I will try to explain a problem again in this list.
> >
> > lets assume you want to have several resources running on the same node.
> > They are independent, so if one is going down, others shouldn't be
> > stopped. You would do this by using a resource set, like this:
> >
> > primitive dummy1 ocf:pacemaker:Dummy
> > primitive dummy2 ocf:pacemaker:Dummy
> > primitive dummy3 ocf:pacemaker:Dummy
> > colocation together inf: ( dummy1 dummy2 dummy3 )
> >
> > and I expect them to run on the same host, but they are not and I
> > attached hb_report to the case to prove it.
> >
> > Andrew closed it with the comment "Thats because you have
> > sequential="false" for the colocation set." But sequential="false" means
> > doesn't matter what order do they start.
> 
> No.  Thats not what it means.
> And I believe I should know.
> 
> It means that the members of the set are NOT collocated with each
> other, only with any preceding set.

Just for clarification:

colocation together inf: ( dummy1 dummy2 dummy3 ) dummy4

.... is a shortcut for:

colocation together1 inf: dummy4 dummy1
colocation together1 inf: dummy4 dummy2
colocation together1 inf: dummy4 dummy3

... is that correct?

To pick up Vadym's Question: 

*  what would be the correct syntax to say "run-together-but-dont-care-if-one-
dies-or-is-not-runable"?

Regards,
Andreas

> 
> > colocation still has to be honored.
> >
> > If I am wrong, what syntax I should use to achieve the described
> > configuration?
> >
> > Thank you,
> > Vadym Chepkov
> >
> >
> >
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> 
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