Checking that Argus is up and running and reachable

It is useful to be able to easily, cheaply and automatically verify that the server is up and running. This is called doing a “health check” or “pinging”.

Argus has a specific endpoint for this: /.still-alive/. It will always return HTTP status code 204, and an empty body. It is idempotent, needs no authentication and can safely be accessed with any HTTP method.

You might want to exclude log lines for visiting /.still-alive/ as they can add a lot of noise to an access log.