Nagios Support Forum

Getting issue with NRPE agent on linux server

I already have NRPE installed on client server but i am getting below error on all nodes.

CHECK_NRPE: Error - Could not connect to 150.236.11.215: Connection reset by peer

What is the version of NRPE that you installed on the client?

The KB article below is written for XI but it's the same for Core:

https://support.nagios.com/kb/article/n ... e-615.html

Follow the troubleshooting steps, outlined in the article in order to fix your issue. Let us know if this helped. Thank you!

@ericssonvietnam, You need to add your Nagios Core server IP to the allowed hosts on the Linux agent. Depending on what Version of NRPE you have installed you need to either: or in Notice how in the first case the IP address are separated by space but in the second case, they're separated by a comma.

Don't forget to restart NRPE after you made changes.

npolovenko wrote:@ericssonvietnam, You need to add your Nagios Core server IP to the allowed hosts on the Linux agent. Depending on what Version of NRPE you have installed you need to either:

Code: Select all

 /etc/xinetd.d/
only_from = 127.0.0.1 Nagios_Server_IP

or in

Code: Select all

/usr/local/nagios/etc/nrpe.cfg
allowed_hosts=127.0.0.1,Nagios_Server_IP

Notice how in the first case the IP address are separated by space but in the second case, they're separated by a comma.

Don't forget to restart NRPE after you made changes.

Now i am able to get the data from the node but still getting some issue with disk check after defining command as well.

[root@localhost etc]# /usr/local/nagios/libexec/check_disk -x 150.236.11.217 -w 20 -c 10 -p /dev/sda2
DISK OK - free space: / 70912 MB (77.53% inode=98%);| /=20551MB;96339;96349;0;96359

can you suggest how i can define service of the above command.

@ericssonvietnam, Sure, in commands.cfg file you'd define:

And the service definition would look like this:

npolovenko wrote:@ericssonvietnam, Sure, in commands.cfg file you'd define:

Code: Select all

define command{
        command_name    check_custom_path
        command_line    $USER1$/check_disk -w $ARG1$ -c $ARG2$ -p $ARGS3$
        }

And the service definition would look like this:

Code: Select all

define service{
        use                             local-service        
        host_name                   localhost
        service_description        Check Custom Path
        check_command           check_custom_path!20!10!/dev/sda2
        }

thanks its working now for me i installed latest nrpe on both client and server.

@ericssonvietnam, Not a problem. I will close this thread as resolved but if you encounter other problems feel free to open a new one.