Site monitoring tools

There are lots and lots of different ways of monitoring your Drupal sites, so this will only be a small subset of options that you can choose from.

Drupal Modules

List of Drupal Modules you can choose from.

Drupal Services that provide monitoring.

A list of free and Open Source self-hosted Docker-based monitoring solutions.

Drupal Sentry is a centralized site-monitoring tool, to help watching over your sites. It consists of two components:

The Industry Standard In IT Infrastructure Monitoring. The Nagios Drupal plugin mitigates the need of installing modules on every site.