What does a "group" relates to?

[wsw70]

As I progress in my monitoring, I realized that the HTML dashboard was empty. After some debugging and scratching my head a lot I found out that when I add a default alerting group, it was used for logging.

Concretely, this is what I had in monitor.ini:

[reporting]
loggers=db,file,status,json_full
alerters=ntfy.sh

In monitors.ini I was declaring a default group for alerting (at least in my imagination):

[defaults]
tolerance=2
group=ntfy.sh

The effect? No logging (alerting was fine). save_results2() was never called.

I got rid of the groups (no groups and no defaults) and everything works.

Thus my question: gow does group work? What should I have there? Does it apply to both logging and alerting?

[jamesoff]

Groups are ways to put monitors with specific alerters and loggers. Monitors can have a single group, and Loggers and Alerters can have multiple ones. If it's not specified, there's an implicit group called default which is used for things so that all Loggers and Alerters work with all monitors.

If you want to have a Logger work for all your Monitors despite some of them having groups, you can specify your Logger as being in the special group _all (with the underscore at the front) which matches all monitor groups.