[ClusterLabs] no clone for pcs-based cluster fencing?

Devin Reade gdr at gno.org
Sun Mar 20 19:20:17 EDT 2016

I'm looking at a new pcs-style two node cluster running on CentOS 7
(pacemaker 1.1.13, corosync 2.3.4) and crm_mon shows this line
for my fencing resource, that is the resource running on only one of
the two nodes:

    fence_cl2 (stonith:fence_apc_snmp):	Started nodeB

On an older CentOS 5 cluster (pacemaker 1.0.12, corosync 1.2.7),
crm_mon shows as the comparable line the following, that is the
fencing agent cloned across both nodes:

    Clone Set: pdu-fence
        Started: [ node1 node2 ]

With the new pcs-based clusters, are the (APC SNMP) fencing agents not
supposed to be cloned anymore, or do I just have things misconfigured?

Looking at the pcs man page, it looks like cloning a fencing agent isn't

I was pretty sure I tested fencing on both nodes when I first configured
the cluster, but I don't have a record of where the fencing agent was
running at the time.  I was using the RHEL7 cluster configuration guide
and I don't seem to see anything in there talking about cloning the fencing
agent, so I'm wondering if it's no longer a recommended/required procedure.

New cluster config:

  Stonith Devices:
    Resource: fence_cl2 (class=stonith type=fence_apc_snmp)
     Attributes: pcmk_host_list=nodeA,nodeB ipaddr= 
community=somepass pcmk_host_check=static-list
     Operations: monitor interval=60s (fence_cl2-monitor-interval-60s)

Old cluster config:

   primitive st-pdu stonith:apcmastersnmp \
        params ipaddr="" community="somepass" port="161" \
        op start interval="0" timeout="60s" \
        op stop interval="0" timeout="15s" \
        op monitor interval="3600" timeout="60s"
   clone pdu-fence st-pdu


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