nagios-nrpe-server service will not stay running

[baymer]

I recently started setting up Nagios at my work. I installed Nagios core 4.1.1 on a Debian 7 system to be my monitoring server and it is working great. I installed nagios-nrpe-server and nagios-plugins on the Debian hosts I want to monitor and configured nrpe.cfg to allow my monitoring host. This all seems to be working. I can see the hosts on the web interface and the default sercie checks that come with Nagios are working good. I started looking into doing some custom checks when I ran into an issue. When I run ./check_nrpe against one of my hosts, I get the response "connect to host xxx.xxx.x.xx port 5666: Connection refused". On the host servers if I run the commands "sudo service nagios-nrpe-server restart" or "sudo /etc/init.d/nagios-nrpe server restart" I get the response [ ok ] Staring nagios-nrpe: nagios-nrpe. But, if I try to see the status of the service it says "[FAIL] nagios-nrpe is not running ... failed!". I checked nrpe.pid and found that it does get updated with a new pid every time I attempt to start the service. The best way I can describe the issue is that the nrpe service starts but then immediately dies. Any help would be greatly appreciated.

[hsmith]

How did you install NRPE? Can you post the output of this command run on the machine with NRPE.

Code: Select all

 netstat -pan | grep 5666

[baymer]

Results of netstat - pan | grep 5666

tcp 0 0 172.16.0.10:4506 66.188.18.166:55666 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.142:56667 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.137:56668 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.91:55666 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.105:56661 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.105:56665 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.10:56665 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.38:55666 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.137:56666 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.139:56660 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.58:56662 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 66.188.18.166:56660 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.4:56666 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.117:56666 ESTABLISHED -
tcp 0 0 172.16.0.10:4506 172.16.4.142:56662 ESTABLISHED -

[baymer]

I installed with apt-get install nagios-plugins nagios-nrpe-server.

[rkennedy]

What is the output of getenforce?

It doesn't look like your NRPE service is listening properly on the debian machine. Can you attempt to start it, then run a tail -n500 /var/log/messages | grep 'nrpe' and post the result?

[baymer]

I found the issue was actually a problem with my nrpe.cfg file. Specifically the server_address line. I ended up commenting it out and the nrpe starts and continues to run correctly now. Thanks for the help.

[rkennedy]

Glad to see you were able to solve this!

I'll go ahead and close this thread out now, but feel free to open a new one if you need assistance in the future.