HP Tru64 UNIX and TruCluster Server Version 5.1B-5 Patch Summary and Release Notes (March 2009)

4.2.9 Relocating AutoFS During a Rolling Upgrade on a Cluster
This note applies only to performing rolling upgrades on cluster systems that use
AutoFS.
During a cluster rolling upgrade, each cluster member is singly halted and rebooted
several times. The Patch Kit Installation Instructions direct you to manually relocate
applications under the control of Cluster Application Availability (CAA) prior to halting
a member on which CAA applications run.
Depending on the amount of NFS traffic, the manual relocation of AutoFS may
sometimes fail. Failure is most likely to occur when NFS traffic is heavy. The following
procedure avoids that problem.
At the start of the rolling upgrade procedure, use the caa_stat command to learn
which member is running AutoFS. For example:
# caa_stat -t
Name Type Target State Host
------------------------------------------------------------
autofs application ONLINE ONLINE rye
cluster_lockd application ONLINE ONLINE rye
clustercron application ONLINE ONLINE swiss
dhcp application ONLINE ONLINE swiss
named application ONLINE ONLINE rye
To minimize your effort in the following procedure, perform the roll stage last on the
member where AutoFS runs.
When it is time to perform a manual relocation on a member where AutoFS is running,
follow these steps:
1. Stop AutoFS by entering the following command on the member where AutoFS
runs:
# /usr/sbin/caa_stop -f autofs
2. Perform the manual relocation of other applications running on that member:
# /usr/sbin/caa_relocate -s current_member -c target_member
After the member that had been running AutoFS has been halted as part of the rolling
upgrade procedure, restart AutoFS on a member that is still up. (If this is the roll stage
and the halted member is not the last member to be rolled, you can minimize your
effort by restarting AutoFS on the member you plan to roll last.)
1. On a member that is up, enter the following command to restart AutoFS. (The
member where AutoFS is to run, target_member, must be up and running in
multi-user mode.)
# /usr/sbin/caa_startautofs -c target_member
2. Continue with the rolling upgrade procedure.
208 TruCluster Server Patches