Group is alerting, even though the nodes were placed in "maintenance mode"

maxxym

Hello!

We ran into a situation last night that I am having problems figuring out why this happened. We have a regular "Node Down" monitoring created. On top of that, we also have group monitoring setup that combine couple of those nodes together and send an alert when both of the nodes are down.

Our network engineer was doing some maintenance and scheduled maintenance mode on 2 nodes. I can see it in the log that he in-fact did that. Now, we also have a group that is setup for those 2 node to alert if BOTH of them are reporting as down at the same time. No problems there...however, during the maintenance, we still received an alert from the group, because the group was reporting as "down". Why would these nodes report anything if they were placed in "maintenance mode"?

Thank you for any insight...

mesverrum

Maintenance mode could actually be two completely different things, unmanaged or muted.

Muting stops the specific node object from triggering any alerts, but they still get polled and their statuses still change as normal.   The group is a different object and so it still had whatever alerts you set up for it.  There isn't currently an option to mute a group.

Unmanaged in this case probably would work the way you had hoped, since both nodes would have changed to unmanaged and so the group would have inherited that same status as well, as long as your alert doesn't also trigger on unmanaged groups.