Status is important. It might be a status report, or sometimes it's "network status" (are we up?) You can setup custom monitoring services and playbooks for failover and recovery. However, sometimes a simple 3rd party service might suffice. A newcomer in the field is https://statuspage.io
Another project is Graphite [1], which can be used with the built-in statsd collection in MediaWiki [2]
In the Cloud-Native world, Prometheus is an active project. It's a time-series database and metrics monitoring solution, with many exporters including haproxy, memcached, mysqld, etc..