A small Node.js utility to listen to Supervisord events and publish status messages to a webhook receiver such as Discord, Telegram or Slack.
npm install
Edit .env to specify a target webhook URL and Supervisor process group name to match.
Next, define a event listener in your Supervisor configuration (under /etc/supervisor/conf.d/). A subset of event types can be matched.
[eventlistener:minecraft_status]
command=node app.js
directory=/home/minecraft/minecraft-status-notifier
user=minecraft
events=PROCESS_STATE
Finally, load the updated configuration.
supervisorctl update
To match additional event types and customise broadcasted messages, edit config/messages.json.
Maintenance mode can be set from the package directory. When enabled, new event messages will be suppressed.
npm run down
This creates a MAINTENANCE_MODE file which can be deleted manually, or is removed when maintenance mode is disabled.
npm run up
This implementation can easily be generalised for any Supervisor-managed process, however was created as a quick personal tool and serves for reference purposes.