[Pacemaker] colocation quandery

[Andrew Beekhof]

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.