Systemd Service Summary
This check gives a summary of the linux services provided by
the command 'systemctl --all'.
The check reports the number of all services and for each service
type, i.e. 'active', 'inactive', 'failed' and other ones.
The state mapping is configurable, by default active and inactive
states are OK, failed and all others are CRIT.
Note that by default, failed systemd services that are disabled do not result in CRIT.
This is configurable so that such services do trigger a CRIT.
Item
The fixed statement {{Summary}}
Discovery
One summary service is created.