Serviceguard NFS Toolkit A.11.11.06, A.11.23.05 and A.11.31.08 Administrator's Guide (October 2011)

In this example, nfs1 is the name that maps to the relocatable IP address of the package. It
must be configured in the service name used by the server (DNS, NIS, or /etc/hosts file).
If a server for the package will NFS-mount the package file systems, the client mount point
(CNFS) must be different from the server location (SNFS).
4. Copy the script you have just modified to the same location in all the servers that will NFS-mount
the file systems in the package.
5. After the package is active on the primary node, execute the nfs_xmnt script on each server
that will NFS-mount the file systems.
/etc/cmcluster/nfs/pkg1/nfs1_xmnt start
Hewlett-Packard recommends that you execute the nfs_xmnt script from the command line
after the package is active on the primary node. However, you can configure the nfs_xmnt
to be executed as part of package startup. For this, configure nfs_xmnt as an external script
in the package configuration file by following the steps below:
a. Copy the external script template file to the package directory location to create the
external script specific to the package.
cp /etc/cmcluster/examples/external_script.template /etc/cmcluster/nfs/pkg1/ext1_xmnt
b. Modify the start_command function in the ext1_xmnt script, as below:
function_start_command
{
sg_log 5 "start_command"
# ADD your package start steps here
/etc/cmcluster/nfs/pkg1/nfs1_xmnt start
remsh sage /etc/cmcluster/nfs/pkg1/nfs1_xmnt start
return 0
}
c. Copy the modified external script to the same location in all the servers that will NFS-mount
the file systems in the package
d. Specify the external script location in the package configuration file, in the “external
script” section as below
external_script /etc/cmcluster/nfs/pkg1/ext1_xmnt
The second line in the start command function of ext1_xmnt invokes remsh to run the
nfs_xmnt script on remote host sage.
Running the nfs_xmnt script as an external script guarantees that the package is active
before the mount command executes. It prevents cross-mounted servers from becoming
deadlocked while each server hangs on the mount command, waiting for the other server's
package to become active. However, if the package fails to activate, or if the remsh command
fails, the file systems are not mounted, and no error is returned. The only way to be sure the
file systems are mounted successfully is to run the nfs_xmnt script manually on each host
where the file systems must be mounted.
Creating the Cluster Configuration File and Bringing Up the Cluster
To create the cluster configuration file, verify the cluster and package configuration files, and run
the cluster, perform the following steps:
1. Create the cluster configuration file from your package configuration files:
cmquerycl -v -C /etc/cmcluster/nfs/cluster.conf -n basil -n sage -n thyme
You must run this command on all nodes in the cluster.
2. Set the FIRST_CLUSTER_LOCK_VG and MAX_CONFIGURED_PACKAGES variables in the
cluster.conf script on each node.
52 Installing and Configuring Serviceguard NFS Modular Package