Downgrading from HA Masters to Single Master

Icinga 2
,
1

I’m having issues with Dual HA Master setup with all clients on 2.12.2-1.

The /var/lib/icinga2/api/logs folder on Master1 is filling up with numbered logs and the 2nd Master was having OOM issues. With both Masters on, the stack used to work fine but now random zones will have late checks.

Running
var res = {}; for (s in get_objects(Service).filter(s => s.last_check < get_time() - 2 * s.check_interval)) { res[s.paused] += 1 }; res

on either master returns {} so I am unable to check if there is a split brain scenario happening between the two masters. Icingaweb2 seems to be fine and returning check results though.

My question is: While I’m trying to troubleshoot this issue, is it possible to downgrade the setup back to a Single master setup by just editing the zones.conf on the master and each pair of satellites in each zone to remove the 2nd master? Is there any other factors I should take into consideration here?

2

You should only have to worry about all zone configs that point to both masters (pick a single master).

On the master that you’re going to remove, mask, stop, and disable the service so that it doesn’t kick back on and cause issues.

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3

And you should select the master with the CA.

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