Nagios Support Forum

Hi,

Anyone have any experience setting up and running Nagios Core on CentOS 7 yet ? I'm currently running CentOS 6 and imagine the process will be *fairly* similar though perhaps not identical.

Cheers

Should be identical, I think the only major changes would be packaging bumps, I believe we have a test XI server running on it right now and it didn't give us much trouble. We'd be interested to hear how it goes for you if you set up a test system on it!

I've been working on installing Nagios Core 4 on CentOS7. I was able to get Nagios Core working, the issue I'm at right now is getting the NRPE service to install as a daemon. I've followed the instructions and I get the check_nrpe file, but nrpe isn't installed as a service. My guess is there is an issue with installing via systemctl. I've done a bunch of googling to see how to install nrpe via systemctl, but I've come up short.

How are you installing NRPE? RPM? Source? What guide are you following, we can take a look and see exactly what you are trying to do to better help you.

slansing wrote:How are you installing NRPE? RPM? Source? What guide are you following, we can take a look and see exactly what you are trying to do to better help you.

I using source following the directions in the nagios NRPE documentation
http://nagios.sourceforge.net/docs/nrpe/NRPE.pdf

I was installing from source, following the directions from this documentation, section D. I followed step i, substituting the version in documentation with NRPE 2.15 found here http://sourceforge.net/projects/nagios/ ... nrpe-2.15/

At step ii, I tried to test check_nrpe by connecting to local host and I get a communication error. There are a few troubleshooting steps in that step, one which I wasn't sure if it applied to CentOS7 considering they have made a major change from init to systemd, and I'm not sure if I should be installing and using xinetd. "-Make sure that the NRPE daemon is installed properly under xinetd." It's because I'm not using xinetd, but systemctl to manage services. Maybe this is the wrong approach and I must use xinetd?

xinetd is not required. You should be able to test the nrpe daemon by just passing it "-d" and "-c <path to nagios.cfg>:

abrist wrote:xinetd is not required. You should be able to test the nrpe daemon by just passing it "-d" and "-c <path to nagios.cfg>:

Code: Select all

/path/to/nrpe -d -c /path/to/nagios.cfg

Once I did that I was able to successfully test the check_nrpe service, though I needed to make one change. I did "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg", not nagios.cfg as you suggested. Thanks!

However, I still don't see the service registered in systemd/systemctl and once I reboot the daemon didn't restart until I ran the above command again. Please bare with me, I'm still learning linux. I appreciate your help!

You can probably get by with what is called the "rc.local" file - basically it runs all commands in it upon startup:

http://drewsymo.com/2013/11/run-a-scrip ... s-startup/