CODEWITHSUNDEEP
javaspring-bootservicesystemd
sebasira
sebasira

Reputation: 1834

Systemd force directory of execution

I have a Java app and I want to create a system service to execute that jar at boot. I know how to do it for upstart and SysV but I'm having troubles with systemd.

The difficult part is that I need that the jar be executed from within the directory where it resides, so that it pick up application.properties next to it, and also some directories that are relative to the jar location.

For example, assume the following structure:

+-var
   +-myapp
       +-app.jar
       +-app.log
       +-application.properties
       +-certificate.jks
       +-images
           +-img1.jpg

The way I want to execute the jar is:

$ cd /var/myapp
$ java -jar app.jar

So as I'm in the myapp directory when executing the jar, it logs to app.log, it pick up application.properties and reads the certificate.jks. Also it could find the directory images.

I've try this as unit file for systemd

 [Unit]
 Description=App Description
 After=network.target

 [Service]
 Type=simple
 User=sebasira
 WorkingDirectory=/var/myapp
 ExecStart=/usr/bin/java -jar app.jar
 SuccessExitStatus=143
 Restart=on-failure

 [Install]
 WantedBy=multi-user.target

It runs the jar file, but not from within /var/myapp

How can I solve it?

Upvotes: 1

Views: 319

Answers (1)

bsaverino
bsaverino

Reputation: 1285

Make a shell script like in /var/myapp:

#!/bin/sh
# runMyJar.sh    
java  -Djava.awt.headless=true -jar /var/myapp/app.jar

Make it executable of course.

Then configure it as service to fork at boot:

    [Unit]
    Description=My App Jar

    [Service]
    Type=forking
    ExecStart=/var/myapp/runMyJar.sh

    [Install]
    WantedBy=multi-user.target

Add other systemd options as you wish.

The jar file should execute with /var/myapp as default home or workspace directory.

EDIT (based on @sebasira comment)

The following .sh script may also work with this systemd configuration:

#!/bin/sh
# runMyJar.sh    
cd /var/myapp/;java -jar app.jar

Upvotes: 1

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