E. Upgrading A Red Hat Cluster From Rhel 4 To Rhel 5 - Red Hat ENTERPRISE LINUX 5 - ADMINISTRATION Manual

Appendix E. Upgrading A Red Hat
Cluster from RHEL 4 to RHEL 5
This appendix provides a procedure for upgrading a Red Hat cluster from RHEL 4 to RHEL 5. The
procedure includes changes required for Red Hat GFS and CLVM, also. For more information about
Red Hat GFS, refer to Global File System: Configuration and Administration. For more information
about LVM for clusters, refer to LVM Administrator's Guide: Configuration and Administration.
Upgrading a Red Hat Cluster from RHEL 4 to RHEL 5 consists of stopping the cluster, converting the
configuration from a GULM cluster to a CMAN cluster (only for clusters configured with the GULM
cluster manager/lock manager), adding node IDs, and updating RHEL and cluster software. To
upgrade a Red Hat Cluster from RHEL 4 to RHEL 5, follow these steps:
1. Stop client access to cluster high-availability services.
2. At each cluster node, stop the cluster software as follows:
a. Stop all high-availability services.
b. Run service rgmanager stop.
c. Run service gfs stop, if you are using Red Hat GFS.
d. Run service clvmd stop, if CLVM has been used to create clustered volumes.
Note
If clvmd is already stopped, an error message is displayed:
# service clvmd stop
Stopping clvm:
[FAILED]
The error message is the expected result when running service clvmd stop
after clvmd has stopped.
e. Depending on the type of cluster manager (either CMAN or GULM), run the following
command or commands:
• CMAN — Run service fenced stop; service cman stop.
• GULM — Run service lock_gulmd stop.
f. Run service ccsd stop.
3. Disable cluster software from starting during reboot. At each node, run /sbin/chkconfig as
follows:
# chkconfig --level 2345 rgmanager off
105