MCSG: Rebuilding a cluster

Title:

MCSG: Rebuilding a cluster

Author:

Douglas O’Leary <dkoleary@olearycomputers.com>

Description:

MCSG: Rebuilding a cluster

Date created:

06/2007

Date updated:

07/2008

Disclaimer:

Standard: Use the information that follows at your own risk. If you screw up a system, don’t blame it on me…

To completely rebuild a cluster from scratch, do the following:

1. Halt the cluster:

   cmhaltcl -f
   

2. On all nodes:

   rm /etc/cmcluster/*
   

3. On a two node cluster, enable at least one of the volume groups used for packages. This volume group will be used for the lock disk.

   vgchange -c n ${vg}
   vgchange -a y ${vg}
   

4. Generate a cluster configuration script.

   cmquerycl -C ${config} -v -n ${node1} ... -n ${node#}
   cmgetconf -c ${cluster} > ${config}
   

5. Edit the configuration file as appropriate:

   cmcheckconf -C ${config}
   cmapplyconf -C ${config}