Is your feature request related to a problem? Please describe.

How our checks scheduler works:

Describe the solution you'd like

How our checks scheduler shall work:

Describe alternatives you've considered

None.

Additional context

A lot of checks run every 5m, but they don't have to run exactly every 5m.

Tasks

• Complete your current tasks not related to this issue
• Design an algorithm (yes, structure charts on paper! 😜) how Icinga shall transform the situation shown in the first picture into the one shown in the second picture (keep in mind that there are different check intervals – 1s-24h, different retry intervals and hosts/services may be added/removed at run time)
• Present that algo @lippserd and me and get green light from us
• Implement that check scheduler "on the green meadow" (not in Icinga 2) in Go