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Appendix C. 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
d. Run
service clvmd stop
Note
If
clvmd
# service clvmd stop
Stopping clvm:
The error message is the expected result when running
after
clvmd
e. Depending on the type of cluster manager (either CMAN or GULM), run the following
command or commands:
• CMAN — Run
• GULM — Run
.
, if you are using Red Hat GFS.
, if CLVM has been used to create clustered volumes.
is already stopped, an error message is displayed:
has stopped.
service fenced stop; service cman stop
service lock_gulmd stop
service clvmd stop
.
.
[FAILED]
99
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