Ubuntu java service wrapper
This is a simple wrapper to run a Java program as service. You need to be a root user. In this example SYSTEMD is used instead of init.d because it's becoming obsolete.
Instructions:
- Create a file under /etc/systemd/system/ with nano or vi and paste the example script below. eg. sudo vi /etc/systemd/system/MyService.service
- Paste the code below in your new file:
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| [Unit] | |
| Description = Java Service | |
| After network.target = MyService.service | |
| [Service] | |
| Type = forking | |
| ExecStart = /usr/local/bin/MyService.sh start | |
| ExecStop = /usr/local/bin/MyService.sh stop | |
| ExecReload = /usr/local/bin/MyService.sh reload | |
| [Install] | |
| WantedBy=multi-user.target |
- Create a file with under /usr/local/bin/ eg. sudo vi /usr/local/bin/MyService.sh
- Paste the Code example below
- Modify the SERVICE_NAME, PATH_TO_JAR, and choose a PID_PATH_NAME for the file you are going to use to store your service ID.
- Write the file and give execution permisions ex. sudo chmod +x /usr/local/bin/MyService.sh
- Test that it runs ex. /usr/local/bin/./MyService.sh start
- Test that it stops ex. /usr/local/bin/./MyService.sh stop
- Test that it restarts ex. /usr/local/bin/./MyService.sh restart
- Enable the service with the command sudo systemctl enable MyService
- To run the service sudo systemctl start MyService.service
- To stop the service sudo systemctl stop MyService.service
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| #!/bin/sh | |
| SERVICE_NAME=MyService | |
| PATH_TO_JAR=/usr/local/MyProject/MyJar.jar | |
| PID_PATH_NAME=/tmp/MyService-pid | |
| case $1 in | |
| start) | |
| echo "Starting $SERVICE_NAME ..." | |
| if [ ! -f $PID_PATH_NAME ]; then | |
| nohup java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null & | |
| echo $! > $PID_PATH_NAME | |
| echo "$SERVICE_NAME started ..." | |
| else | |
| echo "$SERVICE_NAME is already running ..." | |
| fi | |
| ;; | |
| stop) | |
| if [ -f $PID_PATH_NAME ]; then | |
| PID=$(cat $PID_PATH_NAME); | |
| echo "$SERVICE_NAME stoping ..." | |
| kill $PID; | |
| echo "$SERVICE_NAME stopped ..." | |
| rm $PID_PATH_NAME | |
| else | |
| echo "$SERVICE_NAME is not running ..." | |
| fi | |
| ;; | |
| restart) | |
| if [ -f $PID_PATH_NAME ]; then | |
| PID=$(cat $PID_PATH_NAME); | |
| echo "$SERVICE_NAME stopping ..."; | |
| kill $PID; | |
| echo "$SERVICE_NAME stopped ..."; | |
| rm $PID_PATH_NAME | |
| echo "$SERVICE_NAME starting ..." | |
| nohup java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null & | |
| echo $! > $PID_PATH_NAME | |
| echo "$SERVICE_NAME started ..." | |
| else | |
| echo "$SERVICE_NAME is not running ..." | |
| fi | |
| ;; | |
| esac |
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