Kristian Klausen authored Feb 26, 2021 and Jelle van der Waa committed Apr 08, 2021

Fix #263

Extend the memcached service for the AUR to allow the memcached group to
read the socket to obtain statistics.

Add a new role called prometheus_exporters which should be run on every
machine we have and starts different collectors depending on what group
the machine is in. Currently supported our the gitlab runner exporter,
rebuilder textcollector, mysqld-exporter, borg textcollector and an
node/arch exporter. The arch exporter monitors the security status and
pacman out of date packages gauge.

Introduce a new monitoring server with prometheus and alertmanager for
monitoring all our boxes.