Running Nagios on Vmware

[Frost, Mark {PBC}]

In my experience, there are weird things that happen with timing.  That is, the time
on a VM should be sync'd with a time source so no time is lost.  However, the VM
has what I like to think of as "seconds of variable length".

So when we tested with a VM a few years ago, the latency and execution timings and
calculations were really screwy.  There were checks that Nagios thought ran in
"-0.15" seconds, for example.  Considering that this was information that we cared
about, we chose to stick with a physical box.

And yes, I/O is now an increasing concern for us so a VM would be even less likely.

That said, I know another team who has much lighter requirements (they just want
alerts, don't care about latencies (yet)) and they've been on a VM for years now with
Nagios.

Mark

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