Managing HP Serviceguard A.11.20.00 for Linux, June 2012

HP recommends that you update the new MAC address in the cluster binary configuration file by
re-applying the cluster configuration. Use the following steps for online reconfiguration:
1. Use the cmgetconf command to obtain a fresh ASCII configuration file, as follows:
cmgetconf config.conf
2. Use the cmapplyconf command to apply the configuration and copy the new binary file to
all cluster nodes:
cmapplyconf -C config.conf
This procedure updates the binary file with the new MAC address and thus avoids data inconsistency
between the outputs of the cmviewconf and ifconfig commands.
Replacing a Failed Quorum Server System
When a quorum server fails or becomes unavailable to the clusters it is providing quorum services
for, this will not cause a failure on any cluster. However, the loss of the quorum server does increase
the vulnerability of the clusters in case there is an additional failure. Use the following procedure
to replace a defective quorum server system. If you use this procedure, you do not need to change
the configuration of any cluster nodes.
IMPORTANT: Make sure you read the latest version of the HP Serviceguard Quorum Server
Release Notes before you proceed. You can find them at: http://www.hp.com/go/
hpux-serviceguard-docs->HP Serviceguard Quorum Server Software. You should
also consult the Quorum Server white papers at the same location.
1. Remove the old quorum server system from the network.
2. Set up the new system and configure it with the old quorum server’s IP address and hostname.
3. Install and configure the quorum server software on the new system. Be sure to include in the
new QS authorization file (for example, /usr/local/qs/conf/qs_authfile) on all of
the nodes that were configured for the old quorum server. Refer to the qs(1) man page for
details about configuring the QS authorization file.
NOTE: The quorum server reads the authorization file at startup. Whenever you modify the
file qs_authfile, run the following command to force a re-read of the file. For example,
on a Red Hat distribution:
/usr/local/qs/bin/qs -update
On a SUSE distribution:
/opt/qs/bin/qs -update
4. Start the quorum server as follows:
• Use the init q command to run the quorum server.
Or
• Create a package in another cluster for the Quorum Server, as described in the Release
Notes for your version of Quorum Server. They can be found at http://www.hp.com/
go/hpux-serviceguard-docs->HP Serviceguard Quorum Server Software.
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:
Replacing a Failed Quorum Server System 229