Just today one of my friend are pm me and ask how to make his tomcat service at /etc/init.d/tomcat to run when the server reboot. At the first time i just tell him to use chkconfig because the os that he use was CentOS
What is chkconfig ?
Chkconfig is a basic system utility. It updates and queries runlevelinformation for system services. Chkconfig manipulates the numerous symbolic links in /etc/rc*.d, to relieve system administrators of some of the drudgery of manually editing the symbolic links.
chkconfig –list [name]
chkconfig –add name
chkconfig –del name
chkconfig [–level levels] name <on|off|reset>
chkconfig [–level levels] name
But when my friend use chkconfig there were error :
# chkconfig –levels 235 tomcat on
service tomcat does not support chkconfig
okay my friend ask me what is the 235 means , 235 is runlevel that the script starts.
For instance, if we called this script /etc/init.d/new-service and ran chkconfig new-service on, it would be active in runlevels 2,3 and 5.
0-6 are runlevels. Typically for Redhat based distributions:
0 – Halt the system
1 – Single-user mode
2 – Multi-user mode (without networking)
3 – Multi-user mode
5 – Multi-user mode, graphical login
6 – Reboot the system
you can check your service run level by using chkconfig –list:
# chkconfig –list
courier-authlib 0:off 1:off 2:on 3:on 4:on 5:on 6:off
courier-imap 0:off 1:off 2:on 3:on 4:on 5:on 6:off
crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
httpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
iptables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
ldap 0:off 1:off 2:off 3:off 4:off 5:off 6:off
lm_sensors 0:off 1:off 2:on 3:on 4:on 5:on 6:off
lsws 0:off 1:off 2:on 3:on 4:off 5:on 6:off
mcstrans 0:off 1:off 2:on 3:on 4:on 5:on 6:off
messagebus 0:off 1:off 2:off 3:on 4:on 5:on 6:off
mysqld 0:off 1:off 2:off 3:off 4:off 5:off 6:off
named 0:off 1:off 2:off 3:off 4:off 5:off 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
netfs 0:off 1:off 2:off 3:off 4:off 5:off 6:off
netplugd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
portmap 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rdisc 0:off 1:off 2:off 3:off 4:off 5:off 6:off
restorecond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
snmpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
snmptrapd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
syslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off
winbind 0:off 1:off 2:off 3:off 4:off 5:off 6:off
xinetd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
about the service tomcat does not support chkconfig error , after some searching it turn’s out. In order to support chkconfig, an init script must:
1. Be located in /etc/rc.d/init.d (which /etc/init.d is a symlink to)
2. Have a commented out line that contains “chkconfig: <default runlevels for this service> <start priority> <stop priority>”
3. Have a commented out line that contains “description: <a description of the service>”
4. Upon successful service startup, place a lock file in /var/lock/subsys that matches the name of the service script. Upon successful service shutdown, the lockfile must be removed.
okay i ask my friend to add this on the tomcat script
#!/bin/sh
#
# Tomcat Server
#
# chkconfig: 345 96 30
# description: Java servlet container
and after some reboot itis working 🙂 , the tomcat script are executed on reboot time, here is the detail script
#!/bin/sh
#
# Tomcat Server
#
# chkconfig: 345 96 30
# description: Java servlet container
JAVA_HOME=/opt/jdk
PATH=${JAVA_HOME}/bin:${PATH}
TOMCAT_START=/opt/tomcat/bin/startup.sh
TOMCAT_STOP=/opt/tomcat/bin/shutdown.sh
export JAVA_HOME PATH
start()
{
if [ -x ${TOMCAT_START} ]; then
echo “Starting tomcat server…”
${TOMCAT_START} &
else
echo “Cannot start tomcat server”
fi
}
stop()
{
if [ -x ${TOMCAT_STOP} ]; then
echo “Stopping tomcat server…”
${TOMCAT_STOP} &
else
echo “Cannot stop tomcat server”
fi
}
restart()
{
stop
sleep 10
start
}
status()
{
echo “No status available for tomcat server”
}
case “$1” in
‘start’)
start
;;
‘stop’)
stop
;;
‘restart’)
restart
;;
‘status’)
status
;;
*)
echo “Please supply an argument [start|stop|restart]”
esac
