[Pacemaker] Proper way to migrate multistate resource?

Chet Burgess cfb at liquidreality.org
Mon Feb 6 19:48:26 EST 2012


I'm some what new to pacemaker and have been playing around with a number of configurations in a lab. Most recently I've been testing a multistate resource using the ofc:pacemaker:Stateful example RA.

While I've gotten the agent to work and notice that if I shutdown or kill a node the resources migrate I can't seem to figure out the proper way to migrate the resource between nodes when they are both up. 

For regular resources I've used "crm resource migrate <rsc>" without issue. However when I try this with a multistate resource it doesn't seem to work. When I run the command it just puts the slave node into a stopped state. If I try and tell it to migrate specifically to the slave node it claims to already be running their (which I suppose in a sense it is).

The only method I've found to safely and reliable migrate a multistate resource from one node to another is 
I think it has something to do with the resource constraints I used to prefer a particular node, but I'm not entirely sure how the constraints and the master/slave state updating stuff works.

Am I using the wrong tool to migrate a multistate resource or is my configuration wrong in some way? 
Any input greatly appreciated. 
Thank you.

root at tst3.local1.mc:/home/cfb$ crm configure show
node tst3.local1.mc.metacloud.com
node tst4.local1.mc.metacloud.com
primitive stateful-test ocf:pacemaker:Stateful \
	op monitor interval="30s" role="Slave" \
	op monitor interval="31s" role="Master"
ms ms-test stateful-test \
	meta clone-node-max="1" notify="false" master-max="1" master-node-max="1" target-role="Master"
location ms-test_constraint_1 ms-test 25: tst3.local1.mc.metacloud.com
location ms-test_constraint_2 ms-test 20: tst4.local1.mc.metacloud.com
property $id="cib-bootstrap-options" \
	cluster-infrastructure="openais" \
	dc-version="1.1.5-01e86afaaa6d4a8c4836f68df80ababd6ca3902f" \
	last-lrm-refresh="1325273678" \
	expected-quorum-votes="2" \
	no-quorum-policy="ignore" \
rsc_defaults $id="rsc-options" \

Chet Burgess
cfb at liquidreality.org

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