IBM AIX HACMP SG24-5131-00, Hardware User Manual

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Cluster Hardware and Software Preparation
59
3.1.4.5 Editing the /.rhosts File
Make sure that each node’s service adapters and boot addresses are listed in
the /.rhosts
file on each cluster node. Doing so allows the
/usr/sbin/cluster/utilities/clruncmd
command and the
/usr/sbin/cluster/godm daemon to run. The /usr/sbin/cluster/godm daemon is
used when nodes are configured from a central location.
For security reasons, IP label entries that you add to the /.rhosts file to
identify cluster nodes should be deleted when you no longer need to log on to
a remote node from these nodes. The cluster synchronization and verification
functions use
rcmd
and
rsh
and thus require these
/.rhosts
entries. These
entries are also required to use C-SPOC commands in a cluster environment.
The /usr/sbin/cluster/clstrmgr daemon, however, does not depend on /.rhosts
file entries.
The /.rhosts file is not required on SP systems running the HACMP Enhanced
Security. This feature removes the requirement of TCP/IP access control lists
(for example, the /.rhosts file) on remote nodes during HACMP configuration.
#! /bin/sh
# This script checks for a ypbind and a cron process. If both
# exist and cron was started before ypbind, cron is killed so
# it will respawn and know about any new users that are found
# in the passwd file managed as an NIS map.
echo "Entering $0 at ‘date‘" >> /tmp/refr_cron.out
cronPid=‘ps -ef |grep "/etc/cron" |grep -v grep |awk \
’{ print $2 }’‘
ypbindPid=‘ps -ef | grep "/usr/etc/ypbind" | grep -v grep | \
if [ ! -z "${ypbindPid}" ]
then
if [ ! -z "${cronPid}" ]
then
echo "ypbind pid is ${ypbindPid}" >> /tmp/refr_cron.out
echo "cron pid is ${cronPid}" >> /tmp/refr_cron.out
echo "Killing cron(pid ${cronPid}) to refresh user \
list" >> /tmp/refr_cron.out
kill -9 ${cronPid}
if [ $? -ne 0 ]
then
echo "$PROGNAME: Unable to refresh cron." \
>>/tmp/refr_cron.out
exit 1
fi
fi
fi
echo "Exiting $0 at ‘date‘" >> /tmp/refr_cron.out
exit 0