Nagios Support Forum

Esteemed and awesome Nagios people, I have been looking for documentation specifying what the benefits and drawbacks of running NagiosXI on a VM are. I thought I saw it somewhere, but cant remember what kind of overhead we would be looking at in terms of CPU/Memory/disk IO. Do you, or anyone else have any documentation that I could browse on this topic?

Do you have an estimate of the number of hosts you'll monitor? And the number of services?

IMHO, running the VM Appliance is a good option for the following reasons:
1. Ease of setup.
2. Your setup will mirror a lot of the community (better supportability).
3. All the regular advantages of VM over Physical (there are many)

Disadvantages:
1. If your environment is large, physical might be better. We don't run highly active databases in our virtual space.

I wouldn't say we have a doc, usually refer people to this presentation, which has some benchmarks for hardware vs VM for a large Nagios Core install. (slide 6)
http://exchange.nagios.org/directory/Mu ... ny/details

Thanks for the input guys.. That is what I needed.

@CGrahm - We currently check about 2k hosts and 15k services off a 16core blade with 132GB of memory and about five children, MySQL offloaded. With multiple active servers reporting into a passive server, the IO may not be as much of an issue. That was my primary concern. The stats that were provided give me an idea of what we would need to shoot for.

Thanks!