Hello dear community,
suppose I'm monitoring one host.
During this time I set a maintenance windows for this host.
Then I shutdown the host till the end of the maintenance windows.
Just before the maintenace windows expire I start the host again.
Will the availability of the mentioned host be 100% cause of the maintenace windows or will it be less then 100% because, in any case, dynatrace will keep track of the real uptime?
Answer by Chad T. ·
@Yann B. maintenance windows will not affect your availability metrics. We have multiple hosts within our infrastructure that reboot daily. To ensure that we do not alert staff or affect percentages, we toss on maintenance windows set to daily and define those hosts.
As you can see from the screen capture, this reboot happens daily and we have a maintenance window in there to cover it. Over the past 7 days, we are still 100% available as we do not want these outages factored in the overall availability. Management wants to see the percentage of availability when it comes to the server being down unplanned. Our duration is a bit longer then what the host needs but that is to ensure that the host reboots and is fully connected with services and processes when it comes back up.
Answer by Larry R. ·
Side note - setting a maintenance window and scoping it to only the host level does not blackout the entire host like one might think. See the following RFE for more details: https://answers.dynatrace.com/spaces/483/dynatrace-product-ideas/idea/220658/rfe-fix-maintenance-windows-for-hosts-when-a-host.html