Installation guide

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. Example G.1, “GULM XML Elements and Content” shows an example of 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.
7. Run lvmconf --enable-cluster.
8. Enable cluster software to start upon reboot. At each node run /sbin/chkconfig as
follows:
# chkconfig --level 2345 rgmanager on
# chkconfig --level 2345 gfs on
# chkconfig --level 2345 clvmd on
# chkconfig --level 2345 cman on
9. Reboot the nodes. The RHEL 5 cluster software should start while the nodes reboot. Upon
verification that the Red Hat cluster is running, the upgrade is complete.
Upgradin g A Red Hat Clust er from RHEL 4 t o RHEL 5
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