Serviceguard NFS Toolkit A.11.31.02, A.11.11.06, and A.11.23.05 Administrator's Guide

can run on the same node without any problems, and if a package fails over, only
the instance associated with that package is killed.
If you do not want to run the NFS monitor script, comment out the
NFS_SERVICE_NAME and NFS_SERVICE_CMD variables:
# NFS_SERVICE_NAME[0]=nfs.monitor
# NFS_SERVICE_CMD[0]=/etc/cmcluster/nfs/nfs.mon
By default, the NFS_SERVICE_NAME and NFS_SERVICE_CMD variables are
commented out, and the NFS monitor script is not run.
7. If two packages have the same adoptive node, and you want to prevent the adoptive
node from adopting both packages at once, specify the cmmodpkg command with
the package control option (-d) in the customer_defined_run_cmds.
function customer_defined_run_cmds
{
cmmodpkg -d -n ‘hostname‘ pkg02 &
}
The package control option can prevent an adoptive node from becoming
overloaded when multiple packages fail over. If an adoptive node becomes
overloaded, it can fail.
In this example, if a host is an adoptive node for both pkg01 and pkg02, the above
cmmodpkg -d command, in the control script for pkg01, would prevent the host that
is running pkg01 from adopting pkg02. A similar line in the control script for pkg02
could prevent the host that is running pkg02 from adopting pkg01. The ampersand
(&) causes the cmmodpkg command to run in the background. It must run in the
background to allow the control script to finish bringing up the package. The cmmodpkg
command will hang until the package is up, so it must run in the background to allow
the control script to complete.
There is a short time, after one package has failed over but before the cmmodpkg
command has executed, when the other package can fail over and the host will adopt
it. In other words, if two packages fail over at approximately the same time, a host may
adopt both packages, even though the package control option is specified.
See “Example Two - One Adoptive Node for Two Packages with File Lock Migration”
(page 48) for a sample configuration using the package control option.
Editing the NFS Control Script (hanfs.sh)
The hanfs.sh control script contains NFS specific control variables and functions.
The sample steps are as follows:
1. Create a separate XFS[n] variable for each NFS directory to be exported. Specify
the directory name and any export options. The directories must be defined in the
above mounted file system FS list.
XFS[0]="-o ro /pkg1a" XFS[1]="-o rw /pkg1b"
32 Installing and Configuring Serviceguard NFS