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[BASIC] How to add / customize checks.

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First of all, sorry for the basic question. I believe that the documentation is lacking; or maybe I'm just an idiot / not looking in the right place :D .

For example; given this link, it describes how to add or remove checks for services but not the location of the files that should be edited. Or wether they should be configured on the master host, or the sattelite node(s).

I have:

  1. Installed Icingaweb2 and icinga2 on a master machine
  2. Installed icinga2 as a sattelite on my database machine


I now want to monitor if MySQL is running there. In my web interface I see this:




I have 2 questions:

1) Where is it specified it should check HTTP? Where is this configuration located?
2) When I want to test if MySQL is running do I:
- make the configuration on the database node
- make the configuratio on the master icinga2 node

For both cases: What file should I be looking at?

One bonus question: I was expecting to see some graphs of CPU/MEM usage from my hosts but I dont see them anywhere. Maybe I misunderstood what Icinga2 is; icinga2 is for monitoring services only?

Thx,
Sander

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