In rhel7/centos7 we use systemd services.
One of the major changes in RHEL / CentOS 7.0 is the
swtich to systemd, a system and service
manager, that replaces SysV and Upstart used in previous releases of Red Hat
Enterprise Linux.
Ex.
#systemctl start
myservice.service
Here I explain how to write systemd service in rhel7 to work
with any wso2 (carbon) server.
Before creating systemd service we have create a service
call file in your wso2Home/bin directory (if not exist a service file),
#cd <wso2HOME>/bin
#vi myService.sh
Then add below code to the file,
#!bin/sh
USER="user"
USER="user"
PRODUCT_CODE="DSS"
CARBON_HOME="wso2HOME"
LOCK_FILE="${CARBON_HOME}/wso2carbon.lck"
PID_FILE="${CARBON_HOME}/wso2carbon.pid"
CMD="${CARBON_HOME}/bin/wso2server.sh"
JAVA_HOME="/opt/jdk1.7.0_60"
export JAVA_HOME=$JAVA_HOME
# Status the service
status() {
if [ -f
$PID_FILE ]
then
PID=`cat
$PID_FILE`
ps -fp $PID
> /dev/null 2>&1
PIDVAL=$?
else
PIDVAL=3
fi
if [ $PIDVAL
-eq 0 ]
then
echo
"WSO2 $PRODUCT_CODE server is running ..."
else
echo
"WSO2 $PRODUCT_CODE server is stopped."
fi
return
$PIDVAL
}
# Start the service
start() {
if [ -f
$PID_FILE ]
then
PID=`cat
$PID_FILE`
ps -fp $PID
> /dev/null 2>&1
PIDVAL=$?
else
PIDVAL=3
fi
if [ $PIDVAL
-eq 0 ]
then
echo
"WSO2 $PRODUCT_CODE server is running ..."
else
echo
-n "Starting WSO2 $PRODUCT_CODE server: "
touch
$LOCK_FILE
su -
$USER -c "$CMD start > /dev/null 2>&1 &"
sleep
5
if [
-f $PID_FILE ]
then
PID=`cat
$PID_FILE`
ps -fp
$PID > /dev/null 2>&1
PIDVAL=$?
if [
$PIDVAL -eq 0 ]
then
echo
"success"
else
echo
"failure"
fi
else
echo
"failure"
PIDVAL=2
fi
fi
echo
return
$PIDVAL
}
# Restart the service
restart() {
echo -n
"Restarting WSO2 $PRODUCT_CODE server: "
touch
$LOCK_FILE
su - $USER
-c "$CMD restart > /dev/null 2>&1 &"
sleep 15
if [ -f
$PID_FILE ]
then
PID=`cat
$PID_FILE`
ps -fp $PID
> /dev/null 2>&1
PIDVAL=$?
if [
$PIDVAL -eq 0 ]
then
echo
"success"
else
echo
"failure"
fi
else
echo
"failure"
PIDVAL=2
fi
echo
return
$PIDVAL
}
# Stop the service
stop() {
if [ -f
$PID_FILE ]
then
PID=`cat
$PID_FILE`
ps -fp $PID
> /dev/null 2>&1
PIDVAL=$?
if [
$PIDVAL -eq 0 ]
then
echo -n
"Stopping WSO2 $PRODUCT_CODE server: "
su - $USER
-c "$CMD stop > /dev/null 2>&1 &"
rm -f
$LOCK_FILE
sleep 10
PID=`cat
$PID_FILE`
ps -fp
$PID > /dev/null 2>&1
PIDVAL=$?
if [
$PIDVAL -eq 0 ]
then
echo
"failure"
PIDVAL=2
else
echo
"success"
PIDVAL=0
fi
else
echo
"WSO2 $PRODUCT_CODE server is not running."
PIDVAL=0
fi
else
echo
"WSO2 $PRODUCT_CODE server is not running."
PIDVAL=0
fi
echo
return
$PIDVAL
}
### main logic ###
case "$1" in
start)
start
;;
stop)
stop
;;
status)
status
;;
restart|reload|condrestart)
restart
;;
*)
echo
$"Usage: $0 {start|stop|restart|reload|status}"
exit 1
esac
exit $?
Change first 7 lines with your data. Reffere exmples in
comments.
Now let’s create systemd service,
Systemd services are located in /etc/systemd/system
directory.go to the directory,
#cd /etc/systemd/system
Create a file with .service extention(this will be service
you are going to use),
#vi myservice.service
Then add below code to your created file,
[Unit]
Description=Wso2
Identity Server
After=syslog.target
network.target
[Service]
Type=oneshot
ExecStart=/<wso2serverHOME>/bin/myService.sh
start
ExecStop=/<wso2serverHOME>/bin/
myService.sh stop
RemainAfterExit=yes
StandardOutput=syslog
StandardError=syslog
[Install]
WantedBy=multi-user.target
That’s all. Now you have successfully created the systemd
service.
Check the service using below commands and accessing wso2
product consoles,
#systemctl start myservice.service
#systemctl start myservice.service
** note that if you face any error starting stopping the
service, check privileges granted to the service.
