Diagnostic Steps

• The message error: %post(modcluster-0.12.1-2.el5.x86_64) scriptlet failed, exit status 255 tells that while installing the rpm package modcluster, the %post script of that rpm failed.

warning: modcluster-0.12.1-2.el5: Header V3 DSA signature: NOKEY, key ID 37017186
error: %post(modcluster-0.12.1-2.el5.x86_64) scriptlet failed, exit status 255
Installing system-config-cluster-1.0.57-9.noarch
Installing ipvsadm-1.24-13.el5.x86_64
error: %post(ipvsadm-1.24-13.el5.x86_64) scriptlet failed, exit status 255
Installing cluster-snmp-0.12.1-2.el5.x86_64

• Every rpm package has some scripts associated with them, if those scripts fail, certain operations which are supposed to happen don't complete.
• Example

[root@example ~]# rpm -q --scripts modcluster
postinstall scriptlet (using /bin/sh):
/sbin/chkconfig --add modclusterd
DBUS_PID=`cat /var/run/messagebus.pid 2>/dev/null`
/bin/kill -s SIGHUP $DBUS_PID >&/dev/null
# It's ok if this fails (it will fail when oddjob is not running).
/sbin/service oddjobd reload >&/dev/null
exit 0
preuninstall scriptlet (using /bin/sh):
if [ "$1" == "0" ]; then
    /sbin/service modclusterd stop >&/dev/null
    /sbin/chkconfig --del modclusterd
fi
exit 0
postuninstall scriptlet (using /bin/sh):
if [ "$1" == "0" ]; then
    DBUS_PID=`cat /var/run/messagebus.pid 2> /dev/null`
    /bin/kill -s SIGHUP $DBUS_PID >&/dev/null
    /sbin/service oddjobd reload >&/dev/null
fi
if [ "$1" == "1" ]; then
    /sbin/service modclusterd condrestart >&/dev/null
fi
exit 0


### cluster-snmp ###

• See the script, there is a postinstall scriptlet as follows.

postinstall scriptlet (using /bin/sh):
/sbin/chkconfig --add modclusterd
DBUS_PID=`cat /var/run/messagebus.pid 2>/dev/null`
/bin/kill -s SIGHUP $DBUS_PID >&/dev/null
# It's ok if this fails (it will fail when oddjob is not running).
/sbin/service oddjobd reload >&/dev/null
exit 0

• This scriptlet failed.