Nagios Support Forum

i'm using nagios XI v5.2.9

and in process of installing the nagios agent on the rhel7 host

Can someone assist me if this is supported ? I followed the below steps but gave me error.
1. wget https://assets.nagios.com/downloads/nag ... ent.tar.gz
2.       tar xzf linux-nrpe-agent.tar.gz
3.       cd linux-nrpe-agent
4.       ./fullinstall

Nagios Linux Agent Installation Log
===================================
DATE: Tue Jul 26 17:04:07 EDT 2016

DISTRO INFO:
RedHatEnterpriseServer
7.2
x86_64

Repos already configured - exiting.
Prereqs already installed - skipping...
Users/groups already configured - skipping.
/etc/services already updated - skipping.
The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl.
FirewallD is not running

This needs to be addressed immediately.

Also on nagios i can see the check status as OK: No data received yet.

From the RHEL7 client

[root@reviewboard plugins]# service nrpe status
Redirecting to /bin/systemctl status nrpe.service
● nrpe.service - NRPE
Loaded: loaded (/usr/lib/systemd/system/nrpe.service; enabled; vendor preset: disabled)
Active: active (running) since Tue 2016-07-26 17:16:51 EDT; 7s ago
Process: 16109 ExecStart=/usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -d $NRPE_SSL_OPT (code=exited, status=0/SUCCESS)
Main PID: 16110 (nrpe)
CGroup: /system.slice/nrpe.service
└─16110 /usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -d

Jul 26 17:16:51 reviewboard.bose.com systemd[1]: Starting NRPE...
Jul 26 17:16:51 reviewboard.bose.com nrpe[16109]: Invalid IPv6 address in ACL: localhost
Jul 26 17:16:51 reviewboard.bose.com nrpe[16110]: Starting up daemon
Jul 26 17:16:51 reviewboard.bose.com nrpe[16110]: Server listening on 0.0.0.0 port 5666.
Jul 26 17:16:51 reviewboard.bose.com nrpe[16110]: Server listening on :: port 5666.
Jul 26 17:16:51 reviewboard.bose.com nrpe[16110]: Listening for connections on port 0
Jul 26 17:16:51 reviewboard.bose.com nrpe[16110]: Allowing connections from: 10.100.30.111,10.100.30.113,10.100.30.29,10.100.30.30,10.140.140.2...7.0.0.11
Jul 26 17:16:51 reviewboard.bose.com systemd[1]: Started NRPE.
Hint: Some lines were ellipsized, use -l to show in full.

bosecorp wrote:and in process of installing the nagios agent on the rhel7 host
Can someone assist me if this is supported ?

Yes it's supported.

bosecorp wrote:FirewallD is not running

Was this the last line of the installation log?

Were you prompted for the allowed from address?

bosecorp wrote:Process: 16109 ExecStart=/usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -d $NRPE_SSL_OPT (code=exited, status=0/SUCCESS)

These file locations are not the ones used by our installation script, the files should be:

/usr/local/nagios/bin/nrpe
/usr/local/nagios/etc/nrpe.cfg

It's possible that NRPE was already installed via YUM ?

bosecorp wrote:Also on nagios i can see the check status as OK: No data received yet.

Can you show us a screenshot of this.

Can you provide the service definition for this service.

[root@reviewboard ~]# rpm -qa| grep -i nrpe
nrpe-2.15-7.el7.x86_64

The path which you mentioned is not seen, its installed in some other path, as seen below.

[root@reviewboard ~]# ls -l /usr/local/nagios/bin/nrpe
ls: cannot access /usr/local/nagios/bin/nrpe: No such file or directory
[root@reviewboard ~]# ls -l /usr/local/nagios/etc/nrpe.cfg
ls: cannot access /usr/local/nagios/etc/nrpe.cfg: No such file or directory
[root@reviewboard ~]# find / -name nrpe*
/tmp/linux-nrpe-agent/subcomponents/nrpe
/tmp/linux-nrpe-agent/subcomponents/nrpe/nrpe-2.15.tar.gz
/tmp/linux-nrpe-agent/subcomponents/nrpe/.svn/prop-base/nrpe-2.15.tar.gz.svn-base
/tmp/linux-nrpe-agent/subcomponents/nrpe/.svn/text-base/nrpe-2.15.tar.gz.svn-base
/tmp/linux-nrpe-agent/subcomponents/nrpe/mods/cfg/.svn/text-base/nrpe.cfg.svn-base
/tmp/linux-nrpe-agent/subcomponents/nrpe/mods/cfg/nrpe.cfg
/tmp/linux-nrpe-agent/subcomponents/nrpe/mods/cfg/nrpe
/usr/sbin/nrpe
/usr/lib/tmpfiles.d/nrpe.conf
/usr/lib/systemd/system/nrpe.service
/usr/share/augeas/lenses/dist/nrpe.aug
/usr/share/doc/nrpe-2.15
/run/nrpe
/run/nrpe/nrpe.pid
/sys/fs/cgroup/systemd/system.slice/nrpe.service
/etc/systemd/system/multi-user.target.wants/nrpe.service
/etc/nagios/nrpe.cfg
/etc/nrpe.d
/etc/sysconfig/nrpe

[root@reviewboard ~]# rpm -qa| grep -i nagios
nagios-plugins-users-2.0.3-3.el7.x86_64
nagios-plugins-load-2.0.3-3.el7.x86_64
nagios-plugins-procs-2.0.3-3.el7.x86_64
nagios-common-4.0.8-2.el7.x86_64
nagios-plugins-swap-2.0.3-3.el7.x86_64
nagios-plugins-2.0.3-3.el7.x86_64
nagios-plugins-disk-2.0.3-3.el7.x86_64

Kindly provide me the steps to install the nrpe client on rhel7 and let me know if i need uninstall all the above mentioned rpms first.

Kindly provide me the steps to install the nrpe client on rhel7 and let me know if i need uninstall all the above mentioned rpms first.

If you want to use our Linux agent installer, you will need to uninstall nagios/nrpe rpms, and stop/kill the nrpe service. Currently, NRPE is running as a standalone daemon on this host...

Our official Linux agent installer fails when the "firewalld" is installed but it is NOT running. This is a bug, and I already filed an internal bug report about it (ID 9126) - "Task Detail: Nagios XI Bug Report: Linux Agent Installer fails if firewalld is installed but the service is not running on RHEL/CentOS 7".

The solution (workaround) is simple - before running the "fullinstall" script, start the "firewalld" service: Keep in mind that NRPE will be running under xinetd, so all of the IP addresses from the "allowed_hosts" line in the nrpe.cfg should be placed in the "/etc/xinetd.d/nrpe" file ("only_from" line), and the "xinetd" should be restarted: