[Pacemaker] colocation quandery

[Jean-Francois Malouin]

* Andrew Beekhof <andrew at beekhof.net> [20120222 18:22]:
> On Thu, Feb 23, 2012 at 4:25 AM, Jean-Francois Malouin
> <Jean-Francois.Malouin at bic.mni.mcgill.ca> wrote:
> > * Florian Haas <florian at hastexo.com> [20120222 11:57]:
> >> On Wed, Feb 22, 2012 at 5:06 PM, Jean-Francois Malouin
> >> <Jean-Francois.Malouin at bic.mni.mcgill.ca> wrote:
> >> > Hi,
> >> >
> >> > I have a question about colocation.
> >> >
> >> > (This is on a tiny 2 nodes virtual test cluster with pacemaker-1.1.6
> >> > from Debian Squeeze backports)
> >> >
> >> > I've read the Pacemaker_Explained doc (1.1) and the thread
> >> >
> >> > http://www.gossamer-threads.com/lists/linuxha/pacemaker/69686
> >> >
> >> > many times and I can't wrap my head around it so I created a test
> >> > environment to play around the different scenarios. But...
> >> > is it possible to use crm to create the colocation as in Example 6.16 in
> >> >
> >> > http://www.clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Pacemaker_Explained/s-resource-sets-collocation.html
> >> >
> >> > I've only been able to stuff the relevant xml bits into the cib using cibadmin.
> >>
> >> Yes. It's just within a resource set, the sequence in which you
> >> specify the resources in constraints is identical to that of groups,
> >> and the reverse of standard binary colocation constraints. Confused
> >> yet?
> >
> > a second nature of mine ;)
> > ah, now I think I see what you mean...
> >
> >>
> >> The 6.16 example in shell syntax is as follows:
> >>
> >> colocation coloc-1 inf: ( A B C ) D
> >
> > a careless mistake of mine, must have forgotten to escape the () when I invoked crm...
> >
> > root at node1:~# crm configure colocation coloc-1 inf: \( A B C \) D
> >
> > because seems to work now.
> >
> > How would I go about specifying (with crm) an un-ordered set ( A B C ) in this instance?
> 
> I thought the brackets defaulted to un-ordered.

You're absolutely right.
I'll just stop the noise I'm making.

thanks!
jf

> 
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