How does Nagios handle a Virtual Server Move

[tokeato]

I am currently evaluating Nagios XI. I am convinced it is worth having in my environment but I can't seem to find a discussion on the following.

I manage two mid-size ESX environments, both of which have HA and DRS enabled. Both of these can cause the automated move of a virtual server from one ESX host to another. How does Nagios XI handle this? The Wizard setup process indicates a static relationship but servers can move around when things start going bad. Any discussion on this is appreciated.

Thanks,
Tony

[tmcdonald]

As long as it retains the same external IP and firewall settings it shouldn't matter. If the IP changes then any passive checks are going to go stale and will need to be updated client-side if an IP was used, otherwise in DNS if a hostname was used. Active checks might be affected if there is any sort of whitelist for the hosts that Nagios is checking, and that list will need to be updated similarly to the passive changes. If you have an offloaded database it should be fine as well.

[tokeato]

Your thoughts pointed me in the right direction. The actual checks are based on the IP Address of the underlying host, server, or service so any moves among the ESX hosts would be transparent to the data collection process. Makes perfect sense.

Thanks,
Tony

[tmcdonald]

It's just like any other server. A web server doesn't care if it gets moved, but if DNS is not updated then clients can't find it.

I'll be closing this thread now, but feel free to open another if you need anything in the future!