It may become necessary to temporarily disable the cluster software on a cluster member. For example, if a cluster member experiences a hardware failure, you may want to reboot that member, but prevent it from rejoining the cluster to perform maintenance on the system.
Use the /sbin/chkconfig command to stop the member from joining the cluster at boot-up as follows:
chkconfig --level 2345 rgmanager off chkconfig --level 2345 gfs off chkconfig --level 2345 clvmd off chkconfig --level 2345 fenced off chkconfig --level 2345 lock_gulmd off chkconfig --level 2345 cman off chkconfig --level 2345 ccsd off |
Once the problems with the disabled cluster member have been resolved, use the following commands to allow the member to rejoin the cluster:
chkconfig --level 2345 rgmanager on chkconfig --level 2345 gfs on chkconfig --level 2345 clvmd on chkconfig --level 2345 fenced on chkconfig --level 2345 lock_gulmd on chkconfig --level 2345 cman on chkconfig --level 2345 ccsd on |
You can then reboot the member for the changes to take effect or run the following commands in the order shown to restart cluster software:
service ccsd start
service lock_gulmd start or service cman start according to the type of lock manager used
service fenced start (DLM clusters only)
service clvmd start
service gfs start, if you are using Red Hat GFS
service rgmanager start