Unable to install Linux NPRE Agent

[henryb0i]

Hello, I get an error when i try to install the Linux agent on my ubuntu 16.04 installed on a raspberry pi

This is an extract of the error that was seen
NRPE-POST
sed: can't read /etc/xinetd.d/nrpe: No such file or directory
sed: can't read /etc/xinetd.d/nrpe: No such file or directory

real 0m37.707s
user 0m14.420s
sys 0m2.980s
INSTALLING EXTRA PLUGINS...

real 0m0.102s
user 0m0.000s
sys 0m0.000s
sed: can't read /etc/xinetd.d/nrpe: No such file or directory
Subcomponents installation failed - exiting
RESULT=1

===================
INSTALLATION ERROR!
===================
Installation step failed - exiting.
Check for error messages in the install log (install.log).

If you require assistance in resolving the issue, please include install.log
in your communications with Nagios XI technical support.

The script that failed was: './A-subcomponents'

Attached is the install.log file.

Thanks for your help

[benjaminsmith]

Hi Henry,

What method did you use to install NRPE? The server is probably missing the required packages, you can install them and try again:

Code: Select all

apt-get update
apt-get install -y autoconf automake gcc libc6 libmcrypt-dev make libssl-dev wget

Reference:
NRPE - How To Install NRPE v3 From Source

If this does not work, please post the install log again. Thanks.

[henryb0i]

Hi Benjamin,

Thanks for your feedback.

I ran the commands sucessfully without any errors. Then tried to install the agent again but it failed with this "The script that failed was: './A-subcomponents'"

Attached are the logs. Thanks for your support.

[benjaminsmith]

Hi Henry,

Still seeing the same errors in the install log:

checking for SSL libraries... configure: error: Cannot find ssl libraries
make: *** No rule to make target 'all'. Stop.
make: *** No rule to make target 'install'. Stop.
NRPE-POST
sed: can't read /etc/xinetd.d/nrpe: No such file or directory
sed: can't read /etc/xinetd.d/nrpe: No such file or directory

It looks like it is still missing openssl-devel. Are you using the install script or compiling from source?

[henryb0i]

Hi Benjamin,

i am carrying out the install via command line using the steps on the link below...

https://assets.nagios.com/downloads/nag ... _Agent.pdf

Do you suggest to manually install the openssl-devel ? How do i do that ?

Kind Regards

[benjaminsmith]

Hi Henry,

Please try follow the documentation for compiling from source for Debian / Raspbian on this page.

https://support.nagios.com/kb/article.p ... 5#Raspbian

[henryb0i]

Hello Benjamin,

I followed the script suggested. All commands ran successfully, But when i tried to install the Agent again it failed with the same error message.

This time things are different..
On Nagios Server, it could connect to the System but cannot monitor the applications installed on the system. After a restart there was no connection anymore.

When i try to stop and start the "nrpe" service.. this is the reply i get below...

May 20 12:40:59 rasp-desktop systemd[1]: Started Nagios Remote Plugin Executor.
May 20 12:40:59 rasp-desktop nrpe[13449]: Starting up daemon
May 20 12:40:59 rasp-desktop nrpe[13449]: Cannot write to pidfile '/var/run/nrpe.pid' - check your privileges.
May 20 12:40:59 rasp-desktop systemd[1]: nrpe.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
May 20 12:40:59 rasp-desktop systemd[1]: nrpe.service: Unit entered failed state.
May 20 12:40:59 rasp-desktop systemd[1]: nrpe.service: Failed with result 'exit-code'.

Other troubleshooting steps i took

I granted nagios root permission (sudo usermod -a -G root nagios) so that it could access the "/var/run" folder

After restarting the OS.. i lost the instal.log file. Should i run the install again and when it fails collect and submit the install.log file for your analysis ?

Kind Regards
Henry

[benjaminsmith]

Hi Henry,

Is xinetd running on the server? Try re-starting xinetd and nrpe:

Code: Select all

service xinetd restart
service nrpe restart

Next, check the status:

Code: Select all

service xinetd status
service nrpe status

Is it running or are you getting the same error message?

[ssax]

Yes, but please delete and re-extract the install director first and re-run it, make sure you installed the openssl-devel package, and then attach the install.log.