Hello,
I have a two node cluster with cman (v3.1.7) and pacemaker (v1.1.6)
running in ubuntu 12.04 (as recommended in pacemaker documentation).
This cluster has been running without problems for more than a month
(since I isntalled it), but I'm having problems since I rebooted one
node yesterday (I rebooted the "standby" node).
The problem I'm having is that cman is continously changing its
configuration. I can see with cman_tool status that the cluster
generation value is continously increased.
In the logs there a lot of messages of the form:
Jun 6 09:29:49 myotis52 corosync[32048]: [TOTEM ] A processor joined
or left the membership and a new membership was formed.
Jun 6 09:29:49 myotis52 corosync[32048]: [CPG ] chosen downlist:
sender r(0) ip(155.54.211.166) ; members(old:1 left:0)
Jun 6 09:29:49 myotis52 corosync[32048]: [MAIN ] Completed service
synchronization, ready to provide service.
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] CLM CONFIGURATION
CHANGE
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] New Configuration:
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] r(0)
ip(155.54.211.166)
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] Members Left:
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] Members Joined:
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] CLM CONFIGURATION
CHANGE
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] New Configuration:
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] r(0)
ip(155.54.211.166)
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] Members Left:
Jun 6 09:29:51 myotis52 corosync[32048]: [CLM ] Members Joined:
This is happening even when I run cman in just one node.
I have attached my cluster.conf file. In this file I'm using udpu
transport protocol because nodes are running in vmware infrastructure
where I had problems with multicast.
I have checked ip configuration and it is correct: ips are correctly
configured in /etc/hosts and interfaces are working without any
(apparent) problem. I have also checked this same configuration but
without redundant ring (that is, without altname options and dlm
control=detect and rrp_mode=none) but with the same problem.
Any help?
--
Angel L. Mateo Martínez
Sección de Telemática
Área de Tecnologías de la Información
y las Comunicaciones Aplicadas (ATICA)
http://www.um.es/atica
Tfo: 868889150
Fax: 868888337
<?xml version="1.0"?>
<cluster config_version="4" name="pacemaker">
<dlm protocol="sctp"/>
<fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/>
<clusternodes>
<clusternode name="myotis51" nodeid="1" votes="1">
<altname name="myotis51_backup"/>
<fence>
<method name="pcmk-redirect">
<device name="pcmk" port="server1"/>
</method>
</fence>
</clusternode>
<clusternode name="myotis52" nodeid="2" votes="1">
<altname name="myotis52_backup"/>
<fence>
<method name="pcmk-redirect">
<device name="pcmk" port="server2"/>
</method>
</fence>
</clusternode>
</clusternodes>
<fencedevices>
<fencedevice name="pcmk" agent="fence_pcmk"/>
</fencedevices>
<cman transport="udpu" two_node="1" expected_votes="1" />
<totem rrp_mode="active" />
<logging debug="off"
to_syslog="yes"
to_logfile="no"
/>
</cluster>
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