Nagios Support Forum

Dear Sir/Madam,

1. Can Nagios do Cluster monitoring
2. Hypervisor, VM, Citrix monitoring
3. Can it measure performance of CORE CPU or VCPU (virtual CPU)
4. Minimum value of polling interval that Nagios can take
5. Do we require to open some port on the client machine to monitor it.
6. Monitoring of Amazon Web Services
7. Can Nagios work with MSSQL standard edition also or only Mysql


AMit kr. Sharma

1. Yes
2. Yes
3. Yes
4. Technically 1 second but we do not recommend this. 1 minute is the minimum we recommend.
5. No. You can use passive checks to have the remote machine send internal metric information (CPU, disk, memory) to Nagios. But if you want to use active checks to get the same info, then you will need a port opened and an agent running on the remote machine. For all externally-available information such as pings, whether HTTP is running, etc then no ports must be opened aside from those already running the public services.
6. Yes
7. Both

It is worth noting that while Nagios can monitor pretty much anything, that does not mean there is an option available by default shipped with the product or that there is an existing solution. Certain situations, like monitoring a custom application, will require you to write the plugin for that specific situation.