Red Hat ENTERPRISE LINUX 5 - ADMINISTRATION Manual page 116

Appendix E. Upgrading A Red Hat Cluster from RHEL 4 to RHEL 5
# chkconfig --level 2345 gfs off
# chkconfig --level 2345 clvmd off
# chkconfig --level 2345 fenced off
# chkconfig --level 2345 cman off
# chkconfig --level 2345 ccsd off
4. Edit the cluster configuration file as follows:
a. At a cluster node, open /etc/cluster/cluster.conf with a text editor.
b. If your cluster is configured with GULM as the cluster manager, remove the GULM
XML elements — <gulm> and </gulm> — and their content from /etc/cluster/
cluster.conf. GULM is not supported in Red Hat Cluster Suite for RHEL 5.
"GULM XML Elements and Content"
c. At the <clusternode> element for each node in the configuration file, insert
nodeid="number" after name="name". Use a number value unique to that node. Inserting
it there follows the format convention of the <clusternode> element in a RHEL 5 cluster
configuration file.
Note
The nodeid parameter is required in Red Hat Cluster Suite for RHEL 5. The
parameter is optional in Red Hat Cluster Suite for RHEL 4. If your configuration
file already contains nodeid parameters, skip this step.
d. When you have completed editing /etc/cluster/cluster.conf, save the file and copy it
to the other nodes in the cluster (for example, using the scp command).
5. If your cluster is a GULM cluster and uses Red Hat GFS, change the superblock of each GFS file
system to use the DLM locking protocol. Use the gfs_tool command with the sb and proto
options, specifying lock_dlm for the DLM locking protocol:
gfs_tool sb device proto lock_dlm
For example:
# gfs_tool sb /dev/my_vg/gfs1 proto lock_dlm
You shouldn't change any of these values if the filesystem is mounted.
Are you sure? [y/n] y
current lock protocol name = "lock_gulm"
new lock protocol name = "lock_dlm"
Done
6. Update the software in the cluster nodes to RHEL 5 and Red Hat Cluster Suite for RHEL 5. You
can acquire and update software through Red Hat Network channels for RHEL 5 and Red Hat
Cluster Suite for RHEL 5.
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shows an example of GULM XML elements and content.
Example E.1,