Hi. I am wondering what services it is best to monitor with Nagios which I've installed on my Centos 5.3 VPS. I wish to monitor and understand all essential services of the VPS itself at this stage but, generally, to make the best possible use of Nagios as an analytical tool as well as basic monitoring notifications, etc.
I already have a rough idea based on the main services being run. But I imagine there may be more to this than meets the eye, in particular, in view of any potential performance cost, etc.
I am especially keen to obtain as detailed a picture as possible concerning performance related criteria with a mind to indicating possible improvements that could be made.
I'm pretty new to this so would much appreciate any advice on offer. My thanks.
Thanks for some great replies so far. That nrpe plugin looks very useful at first glimpse and I'm discussing that with my Techs now. It's all heady stuff initially though, for sure. A lot to take in.
I'd already listed all of the above so far except SNMP and wonder to what extent I could benefit from that with a VPS? I mean, will I be able to monitor the external network using this? That would be excellent if so.
Hi David. I wasn't very clear really. It would be great to be able to monitor the network that my VPS depends upon for connectivity. So I just wondered whether this might be possible since I am not in control of it as such?
It might be an idea to clarify where I'm heading with all this a bit more clearly. The idea is to use the VPS to host my main operations exclusively with no clients on it at all. So I'd like to monitor every aspect of the VPS, the private network for backups, the VPS's network connectivity and then, thereafter, comprehensive monitoring of each subsequent server that I add to the network. So this Nagios installation would be the main monitoring for the entire operation into the forseeable future.
That said, my main concern atm is to get a firm grasp on every aspect of my VPS immediately plus the Private Network that I'll be using for backup. The VPS though is the center of the network that I am planning to build. (A single point of failure I know but I'm working on fixing that)
I hope that makes a bit more sense and thanks so much for all the feedback and information so far. It helps massively.
PS: I have to go out for an hour but will check back here when I return. Thanks again.
Last edited by Mach4-Chris; 10-23-2009 at 11:24 AM.
Well, Nagios can be used for service alerts. If you need to calculate BW for n/w you can have a check at Cacti.
You can install nagios on your central vps and configure it to accept input from other n/w and own n/ws. To check, for example, load on a remote server, you need to install load module there. You can check disk space and can configure to send disk space warning alerts.