[ClusterLabs] Two node Active/Active Asterisk+GFS2+DLM+fence_xvm Cluster

TEG AMJG tegamjg at gmail.com
Thu Jul 14 17:47:58 EDT 2016

Dear list

I am quite new to PaceMaker and i am configuring a two node active/active
cluster which consist basically on something like this:

I am using pcsd Pacemaker/Corosync:

 Clone Set: dlm-clone [dlm]
     Started: [ pbx1vs3 pbx2vs3 ]
 Clone Set: asteriskfs-clone [asteriskfs]
     Started: [ pbx1vs3 pbx2vs3 ]
 Clone Set: asterisk-clone [asterisk]
     Started: [ pbx1vs3 pbx2vs3 ]
 fence_pbx2_xvm    (stonith:fence_xvm):    Started pbx1vs3
 fence_pbx1_xvm    (stonith:fence_xvm):    Started pbx2vs3
 Clone Set: clvmd-clone [clvmd]
     Started: [ pbx1vs3 pbx2vs3]

Now my problem is that, for example, when i fence one of the nodes, the
other one restarts every clone resource and start them back again, same
thing happens when i stop pacemaker and corosync in one node only (pcs
cluster stop). That would mean that if i have a problem in one of my
Asterisk (for example in DLM resource or CLVMD) that would require fencing
right away, for example node pbx2vs3, the other node (pbx1vs3) will restart
every service which will drop all my calls in a well functioning node.

All this leads to a basic question, is this a strict way for clone
resources to behave?, is it possible to configure them so they would
behave, dare i say, in a more unique way (i know about the option
globally-unique but as far as i understand that doesnt do the work). I have
been reading about clone resources for a while but there are no many
examples about what it cant do.

Thanks in advance

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