Nagios Support Forum

Do the NLS servers in a cluster need to be on the same network? Let me 'splain:

Hypothetically, we want to do this:

• Box X is in a VMware environment in a data center. X has access to all the other boxes in that data center but no public IP accessibility
• Box Y is in a VMware environment in a lab. Y has access to all the other boxes in that lab but no public IP accessibility
• There is a VPN between X and Y so that they can talk to each other

Can we make X and Y part of the same cluster and point data center boxes at X and lab boxes at Y but search them both from either X or Y?

I though about just trying it to see, but I don't want to go down that road if it's going to be trouble.

This should work fine as long as both instances in the cluster can communicate with each other.

Do they need to be sized the same as far as disk space allocation or does the cluster spread things around proportionally?

The cluster will spread out the data over time between the 2 servers.
We recommend that the servers be as close as possible space wise in case of failure of a larger server, the smaller server will not be able to rebuild the data because of space issues.

I have 4 cluster node system, 2 are in one data center, the other 2 are in another. Works pretty well so far.
One thing I would recommend, in your rsyslog config, forward logs from servers in data center A, to NLS cluster nodes in data center A, and in B to B.
This way you don't have latency.

Yes, that's the idea. The big thing is that the people in lab want to be able to see data from both lab and data center. The question was really about whether the VPN was going to cause a problem, but it's looking like "no."

This can be closed.

It shouldn't be an issue at all