Starting and stopping Discovery

Use the Discovery control script, discovery.sh, to start and stop Discovery.

Starting Discovery

Before starting Discovery, start the database server that Discovery is configured to use.

By default, Discovery is configured to use an example HyperSQL database suitable for evaluating a single Discovery server. To start the example HyperSQL database, run the command below:

$ sql/hsqldb.sh start

Starting Discovery as a background process

To start Discovery as a background process that logs to logs/discovery.log, use the start command:

$ ./discovery.sh start

If Discovery is already running, this command restarts Discovery.

For information on changing default log location, name, and rolling behaviour, see Discovery log files.

Starting Discovery as a foreground process

To start Discovery as a foreground process that logs to STDOUT, use the start command with option -f:

$ ./discovery.sh start -f

This method of starting Discovery is appropriate when running Discovery in a container

Stopping Discovery

Follow the instructions below to stop Discovery.

Stopping a Discovery background process

To stop a Discovery server running as a background process, use the stop command:

$ ./discovery.sh stop

Stopping a Discovery foreground process

To stop a Discovery server running as a foreground process, use one of the methods below:

  • Press Ctrl-C in the terminal running Discovery.

  • Send the process a TERM signal:

    $ kill pid

  • If Discovery is running in a container, stop the container.

Retrieving Discovery status

To determine if Discovery is running as a background process, use the status command:

$ ./discovery.sh status

This command prints the status of Discovery to STDOUT, and exits with status code 0 if Discovery is running or status code 1 if Discovery is not running.