v. 1.21.0


To run the OpenGrok code search engine using Unit:

  1. Install Unit with a Java 11+ language module.

  2. Follow the official OpenGrok installation guide. Here, we’ll place the files at /path/to/app/:

    $ mkdir -p /path/to/app/{src,data,dist,etc,log}
    $ tar -C /path/to/app/dist --strip-components=1 -xzf opengrok-X.Y.Z.tar.gz

    Our servlet container is Unit so we can repackage the source.war file to an arbitrary directory at Step 2:

    $ opengrok-deploy -c /path/to/app/etc/configuration.xml \
          /path/to/app/dist/lib/source.war /path/to/app/

    The resulting pathname is /path/to/app/source.war.

  3. Set installation path permissions to secure access, for example:

    # chown -R app_user:app_group /path/to/app/

    Update the placeholders above with actual values, noting them for later use in Unit configuration.

  4. Next, put together the OpenGrok configuration for Unit:

        "listeners": {
            "*:80": {
                "pass": "applications/opengrok"
        "applications": {
            "opengrok": {
                "type": "java",
                "user": "app_user",
                "group": "app_group",
                "webapp": "/path/to/app/source.war",
                "options": [
  5. Upload the updated configuration. Assuming the JSON above was added to config.json:

    # curl -X PUT --data-binary @config.json --unix-socket \
           /path/to/control.unit.sock http://localhost/config/


    The control socket path may vary; run unitd --help or see Startup and Shutdown for details.

    After a successful update, OpenGrok should be available on the listener’s IP address and port:

    |app| in Unit - Search Screen