[Pacemaker] Ordering and Colocation

[Dan Frincu]

Hi,

On Mon, Aug 15, 2011 at 3:33 AM, Curtis <curtis at tinbrain.net> wrote:
> On 15/08/11 10:23, Curtis wrote:
>>
>> Greetings,
>> I've been wrestling with this configuration for a few days now as I
>> slowly climb the learning curve of Pacemaker.
>
>
> Further details [sorry]-- versions.  All are from debian squeeze
>
> Pacemaker: 1.0.9
> Corosync: 1.2.1
> Cluster Glue: 1.0.6
>
>> My situation is as follows:
>>
>> I have 2 nodes, with 3 layers of resources:
>> drbd->lvm->publish
>>
>> They must run on both nodes, but each service is dependant only on those
>> on the same node.
>>
>> If drbd is not Master, lvm can't start.
>> If lvm isn't started, publish can't start.
>>
>> Now, from talking with beekhof on IRC, All I need is ordering and
>> colocation. This has worked for bringing it up, but when I, say, stop
>> LVM... the publishing doesn't stop.

How do you stop LVM? On what node?
Are you running DRBD dual-primary by any chance?
STONITH configured? And enabled? And tested?

Regards,
Dan

>>
>> Config [sorry if XML is preferred]:
>>
>> primitive drbd_prim ocf:linbit:drbd \
>> params drbd_resource="raid"
>> primitive lvm_prim ocf:heartbeat:LVM \
>> params volgroupname="raid"
>> primitive publish_prim ocf:iomax:scst \
>> prams ....
>> ms drbd drbd_prim \
>> meta master-max="2" master-node-max="1" clone-max="2" clone-node-max="2"
>> notify="true"
>> clone lvm lvm_prim \
>> meta globally-unique="true" clone-max="2" clone-node-max="1"
>> clone publish publish_prim \
>> meta globally-unique="true" clone-max="2" clone-node-max="1"
>> colocation lvm_with_drbd inf: drbd:Master lvm
>> colocation publish_with_lvm inf: lvm publish
>> order drbd_then_lvm inf: drbd:promote lvm symmetrical=true
>> order lvm_then_publish inf: lvm publish symmetrical=true
>>
>> I'd really appreciate any information on how my understanding is
>> deficient, and how to get this working.
>>
>> --
>> Curtis
>>
>> _______________________________________________
>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>>
>> Project Home: http://www.clusterlabs.org
>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>> Bugs:
>> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>
>
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs:
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>



-- 
Dan Frincu
CCNA, RHCE