VMware templates: post-processing for SUSE Linux Enterprise Server and openSUSE

Well, I’ve been fiddling around with SLES and openSUSE VMware templates. I know it’s a stupid idea when you have a PXE server from which you could install this in a matter of minutes (seriously the SLES PXE installation takes about 5 minutes).

However, when dealing with DMZ’s (yeah, they exist!) you usually don’t have any PXE servers there. So I decided to go with simple VMware templates (like we do with Windows already), but had to iron out a few kinks.

There’s no way to run a set of scripts after the deployment scripts from VMware have been run
The hostname isn’t changed everywhere (/etc/postfix/main.cf for example)

So of I went and wrote a short (70 line ..) init script, which will do exactly that.

#!/bin/sh
#
# /etc/init.d/template-deploy
#
### BEGIN INIT INFO
# Provides:             template-deploy
# Required-Start:       $sshd
# Should-Start:
# Required-Stop:        $sshd
# Should-Stop:
# Default-Start:        2 3 5
# Default-Stop:
# Short-Description:    Makes the final adjustments when deployed a template
# Description:          VMware has a few kinks when deploying a linux template.
#                       This init script will handle those kinks and
#                       incorporate the necessary changes to the final system
#                       after the VMware customizations are done.
### END INIT INFO

# Source LSB init functions
. /etc/rc.status

rc_reset

LOGFILES="/var/log/messages* /var/log/mail* /var/log/zypper.log /var/log/localmessages /var/log/warn /var/log/NetworkManager /var/log/zypp/history /var/log/clamd.log /var/log/cksquid.log /var/log/ftp-proxy.log* /var/log/apache2/*_log /var/log/squid/*.log /var/log/pbl.log"

case "$1" in
	start)
		# Read /etc/HOSTNAME and check it against /etc/template
		if [ -f /etc/HOSTNAME -a -f /etc/template ] ; then
			SYS_HOSTNAME="`cat /etc/HOSTNAME`"
			TPL_HOSTNAME="`cat /etc/template`"

			# Only if the hostname isn't like the template name
			# the script will actually run.
			if [ "$SYS_HOSTNAME" != "$TPL_HOSTNAME" ] ; then
				sed -i "s/$TPL_HOSTNAME/$SYS_HOSTNAME/g" \
					/etc/postfix/main.cf /etc/hosts \
					/etc/HOSTNAME

					bash /var/adm/autoinstall/scripts/configure_users.sh

					# Stop services for logfile deletion.
					systemctl stop postfix
					systemctl stop syslog

					# Remove log files
					for file in $LOGFILES; do
						rm -f $file
					done

					rm -f /var/log/YaST2/*
					rm -rf /var/log/vmware-imc

					# Remove the init script
					chkconfig -d template-deploy
					rm -f /etc/template
					rm -f /etc/init.d/template-deploy
				fi
			fi
			rc_status -v
			;;
        *)
			;;
esac
rc_exit

#!/bin/sh

# /etc/init.d/template-deploy

### BEGIN INIT INFO

# Provides: template-deploy

# Required-Start: $sshd

# Should-Start:

# Required-Stop: $sshd

# Should-Stop:

# Default-Start: 2 3 5

# Default-Stop:

# Short-Description: Makes the final adjustments when deployed a template

# Description: VMware has a few kinks when deploying a linux template.

# This init script will handle those kinks and

# incorporate the necessary changes to the final system

# after the VMware customizations are done.

### END INIT INFO

# Source LSB init functions

. /etc/rc.status

rc_reset

LOGFILES="/var/log/messages* /var/log/mail* /var/log/zypper.log /var/log/localmessages /var/log/warn /var/log/NetworkManager /var/log/zypp/history /var/log/clamd.log /var/log/cksquid.log /var/log/ftp-proxy.log* /var/log/apache2/*_log /var/log/squid/*.log /var/log/pbl.log"

case "$1" in

start)

# Read /etc/HOSTNAME and check it against /etc/template

if [ -f /etc/HOSTNAME -a -f /etc/template ] ; then

SYS_HOSTNAME="`cat /etc/HOSTNAME`"

TPL_HOSTNAME="`cat /etc/template`"

# Only if the hostname isn't like the template name

# the script will actually run.

if [ "$SYS_HOSTNAME" != "$TPL_HOSTNAME" ] ; then

sed -i "s/$TPL_HOSTNAME/$SYS_HOSTNAME/g" \

/etc/postfix/main.cf /etc/hosts \

/etc/HOSTNAME

bash /var/adm/autoinstall/scripts/configure_users.sh

# Stop services for logfile deletion.

systemctl stop postfix

systemctl stop syslog

# Remove log files

for file in $LOGFILES; do

rm -f $file

done

rm -f /var/log/YaST2/*

rm -rf /var/log/vmware-imc

# Remove the init script

chkconfig -d template-deploy

rm -f /etc/template

rm -f /etc/init.d/template-deploy

rc_status -v

;;

esac

rc_exit

You’ll also need to create a file (/etc/template), which’ll hold the template’s hostname and will be used for the comparison if VMware’s post-processing is already finished.

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