Managing HP Serviceguard A.11.20.20 for Linux, May 2013

7. If necessary, add the node back into the cluster using the cmrunnode command.
(You can omit this step if the node is configured to join the cluster automatically.)
Now Serviceguard will detect that the MAC address (LLA) of the card has changed from the value
stored in the cluster binary configuration file, and it will notify the other nodes in the cluster of the
new MAC address. The cluster will operate normally after this.
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.
8.6 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 (Select 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
8.6 Replacing a Failed Quorum Server System 253