Stuck in maintenance
While migration to a new server I came about a little issue with Drupal in combination with pfSense and HAProxy. The Maintenance Mode. Drupal is so kind and returns 503 where HAProxy says "Hey that server is off". Ofcourse this just happens if you have the health check on, but it's a little bit anyoing. In this case you have no real chance to login. HAProxy is keeping you away. Simple solution: perform the backends health check via /user under Url used by http check requests. This way you won't get locked out.