This project was merged into systemd library examples.

Plug systemd Example

This is example of Plug+Cowboy application that integrates with systemd via systemd library features like:

• Socket activation to listen on privileged port port (80) while VM running as unprivileged user www-data
• Journal logging, which allows for structured logging and multiline logs
• Watchdog integration which allows for triggering restarts from within application
• Status notifications where application reports readiness when it is really ready and will inform when the application is in process of shutting down

ASCIICinema recording of shutdown handling:

Installation

This project require Elixir 1.10+ for logger integration and OTP 23+ for proper socket support

1. Clone repo.
2. Run make (you will need to enter sudo password for installation of systemd units).
3. Application will be available at http://localhost/.

Endpoints

• / - return OS PID of VM
• /slow - wait 5s before sending response
• /hello - respond with string world
• /stop - trigger Watchdog
• /reload - simulate application reload that last 10s