[Pacemaker] FW: Pacemaker: Change of network IPs of nodes on running cluster

[Roland Goetz]

Hello all,

I have a 2-node cluster running with Pacemaker/Corosync since a year.
Now I had to change the IPs of the two nodes because we have moved the
cluster onto another network.
Since that change the cluster is no longer running.

There was no change on the corosync link itself, corosync is starting well.
I got an error like "Cannot communicate with cib" when I do a "crm status".

As a workaround I switched off corosync on both nodes, powered down one
node and mounted the volumes manually and have started the applications
also manually.

That means that the users can work but not with the advantage of HA

Can you please tell me what went wrong?
Is there a place where Pacemaker stores the IP ?

Installed version:
corosynclib-1.2.1-1.el5                       Wed 14 Apr 2010 04:28:06 PM CEST
corosync-1.2.1-1.el5                          Wed 14 Apr 2010 04:28:07 PM CEST
resource-agents-1.0.3-1.el5                   Mon 19 Apr 2010 02:18:20 PM CEST
cluster-glue-libs-1.0.4-1.el5                 Mon 19 Apr 2010 02:19:15 PM CEST
cluster-glue-1.0.4-1.el5                      Mon 19 Apr 2010 02:19:16 PM CEST
heartbeat-libs-3.0.3-1.el5                    Mon 19 Apr 2010 02:19:45 PM CEST
pacemaker-libs-1.0.8-5.el5                    Mon 19 Apr 2010 02:19:46 PM CEST
heartbeat-3.0.3-1.el5                         Mon 19 Apr 2010 02:19:47 PM CEST
pacemaker-1.0.8-5.el5                         Mon 19 Apr 2010 02:19:48 PM CEST
openaislib-1.1.0-1.el5                        Tue 20 Apr 2010 02:26:20 PM CEST
openais-1.1.0-1.el5                           Tue 20 Apr 2010 02:26:21 PM CEST
graphviz-2.12-8.el5                           Thu 22 Apr 2010 11:18:31 AM CEST



Kind regards,

Roland Goetz