Managing Serviceguard A.11.20, March 2013

3. Install and configure the Quorum Server software on the new system. Be sure to include in the
new QS authorization file (/etc/cmcluster/qs_authfile) all of the nodes that were
configured for the old quorum server. Refer to the qs(1) manpage for details about configuring
the QS authorization file.
4. Start the Quorum Server as follows:
• Edit the /etc/inittab file to add the Quorum Server entries.
• Use the init q command to run the Quorum Server.
See the qs(1) manpage for more details.
5. All nodes in all clusters that were using the old Quorum Server will connect to the new quorum
server. Use the cmviewcl -v command from any cluster that is using the quorum server to
verify that the nodes in that cluster have connected to the QS.
6. The Quorum Server log file on the new quorum server will show a log message like the following
for each cluster that uses the Quorum Server:
Request for lock /sg/<ClusterName> succeeded. New lock owners: N1, N2
7. To check that the Quorum Server has been correctly configured and to verify the connectivity
of a node to the quorum server, you can execute the following command from your cluster
nodes as follows:
cmquerycl -q QSHostName -n Node1 -n Node2 ...
The command will output an error message if the specified nodes cannot communicate with
the quorum server.
NOTE: While the old Quorum Server is down and the new one is being set up, these things can
happen:
• These three commands will not work:
cmquerycl -q
cmapplyconf -C
cmcheckconf -C
• If there is a node or network failure that creates a 50-50 membership split, the quorum server
will not be available as a tie-breaker, and the cluster will fail.
NOTE: Make sure that the old Quorum Server system does not rejoin the network with the old
IP address.
Troubleshooting Approaches
The following sections offer a few suggestions for troubleshooting by reviewing the state of the
running system and by examining cluster status data, log files, and configuration files. Topics
include:
• Reviewing Package IP Addresses
• Reviewing the System Log File
• Reviewing Configuration Files
• Reviewing the Package Control Script
• Using cmquerycl and cmcheckconf
• Using cmviewcl
• Reviewing the LAN Configuration
Troubleshooting Approaches 335