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After doing some searching on setting up "PGPool-HA" to limit pgpool being a single point of failure it looks like development on the heartbeat project has reduced greatly and development has shifted to corosync (backed by RedHat and Suse) that is recommend
by pacemaker.
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<div>I've found an article here <a href="http://masteinhauser.github.com/blog/2011/09/24/pacemaker-pgpool2/">http://masteinhauser.github.com/blog/2011/09/24/pacemaker-pgpool2/</a> that explains using pacemaker with pgpool-II. In the post a resource agent is
provided. There was a quick tweak I had to make with the PGPool-II path created by the installed RPMs obtained from <a href="http://yum.postgresql.org/9.1/redhat/rhel-$releasever-$basearch">http://yum.postgresql.org/9.1/redhat/rhel-$releasever-$basearch</a>.
I modified the below marked in bold from <b>/var/run/pgpool/</b> to <b>/var/run/pgpool-II-91</b></div>
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<div>pgpool2_status() {</div>
<div> if [ ! -r "/<b>var/run/pgpool-II-91/pgpool.pid</b>" ]; then</div>
<div> return $OCF_NOT_RUNNING</div>
<div> fi</div>
<div> ps_info=$(ps ax | grep "pgpool" | grep $(cat <b>/var/run/pgpool-II-91/pgpool.pid</b>))</div>
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<div>I used the following parameters to created the resource</div>
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crm configure primitive pgPool ocf:heartbeat:pgpool2 <span style="color: #dc322f">
\</span></div>
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<span style="color: #93a1a1">params </span>pcp_admin_username<span style="color: #93a1a1"><b>=</b>postgres </span><span style="color: #dc322f">\</span></div>
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params <span style="color: #268bd2">pcp_admin_password</span><b>=</b>password <span style="color: #dc322f">\</span></div>
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<span style="color: #93a1a1">params </span>pcp_admin_port<span style="color: #93a1a1"><b>=</b>9898
</span><span style="color: #dc322f">\</span></div>
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params <span style="color: #268bd2">pcp_admin_host</span><b>=</b>localhost <span style="color: #dc322f">
\</span></div>
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params <span style="color: #268bd2">pgpool_bin</span><b>=</b>/usr/bin/pgpool <span style="color: #dc322f">
\</span></div>
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params <span style="color: #268bd2">pcp_attach_node_bin</span><b>=</b>/usr/bin/pcp_attach_node
<span style="color: #dc322f">\</span></div>
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params <span style="color: #268bd2">pcp_detach_node_bin</span><b>=</b>/usr/bin/pcp_detach_node
<span style="color: #dc322f">\</span></div>
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params <span style="color: #268bd2">pcp_node_count_bin</span><b>=</b>/usr/bin/pcp_node_count
<span style="color: #dc322f">\</span></div>
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params <span style="color: #268bd2">pcp_node_info_bin</span><b>=</b>/usr/bin/pcp_node_info
<span style="color: #dc322f">\</span></div>
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params <span style="color: #268bd2">stop_mode</span><b>=</b>f <span style="color: #dc322f">
\</span></div>
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<span style="color: #93a1a1">params </span>auto_reconnect<span style="color: #93a1a1"><b>=</b>t
</span><span style="color: #dc322f">\</span></div>
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<span style="color: #dc322f">
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<span style="color: rgb(147, 161, 161); ">params </span>fail_on_detached<span style="color: rgb(147, 161, 161); "><b>=</b>true </span><span style="color: rgb(220, 50, 47); ">\</span></div>
</span></div>
<div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; line-height: 18px; font: normal normal normal 12px/normal Menlo; color: rgb(38, 139, 210); ">
<span class="Apple-style-span" style="color: rgb(147, 161, 161); ">op monitor <span style="color: #268bd2">
interval</span><b>=</b>1min</span></div>
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<font class="Apple-style-span" color="#93a1a1"><br>
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<div>The resource is looks to be created correctly but when I (re)start the corosync service and look at crm_mon I see some failed actions</div>
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<div>============</div>
<div>Last updated: Tue Apr 24 08:31:08 2012</div>
<div>Last change: Tue Apr 24 08:02:31 2012 via cibadmin on <a href="http://pg1.stage.arin.net">
pg1.stage.arin.net</a></div>
<div>Stack: openais</div>
<div>Current DC: <a href="http://pg2.stage.arin.net">pg2.stage.arin.net</a> - partition with quorum</div>
<div>Version: 1.1.6-3.el6-a02c0f19a00c1eb2527ad38f146ebc0834814558</div>
<div>2 Nodes configured, 2 expected votes</div>
<div>2 Resources configured.</div>
<div>============</div>
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<div>Online: [ <a href="http://pg1.stage.net">pg1.stage.net</a> <a href="http://pg2.stage.net">
pg2.stage.net</a> ]</div>
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<div>ClusterIP<span class="Apple-tab-span" style="white-space:pre"> </span>(ocf::heartbeat:IPaddr2):<span class="Apple-tab-span" style="white-space:pre">
</span>Started <a href="http://pg2.stage.net">pg2.stage.net</a></div>
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<div>Failed actions:</div>
<div> pgPool_monitor_0 (node=pg1.stage.net, call=3, rc=2, status=complete): invalid parameter</div>
<div> pgPool_monitor_0 (node=pg2.stage.net, call=3, rc=2, status=complete): invalid parameter</div>
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<div>When I look in the /var/log/cluster/corosync.log I see this error <b>Apr 24 08:23:48
<a href="http://pg1.stage.net">pg1.stage.net</a> lrmd: [28471]: WARN: Managed pgPool:monitor process 28484 exited with return code 2</b></div>
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<div>Has anyone ran into a similar experience or have suggestions for a cluster solution with pgpool-II.</div>
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<div>I know this is not 100% related to PGPool so I've also posted it to the pacemaker mailing list. </div>
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<div>v/r</div>
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<div>STEVE</div>
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