The problem seems to be fixed. I have changed nothing in my
configuration, but we had a problem in our network (it seems to be a
loop in the spanning tree of some vlans). Once the network problem was
fixed, the cluster run without problems.
El 06/06/13 10:26, Angel L. Mateo escribió:
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?
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--
Angel L. Mateo Martínez
Sección de Telemática
Área de Tecnologías de la Información
y las Comunicaciones Aplicadas (ATICA)
http://www.um.es/atica
Tfo: 868887590
Fax: 86337
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