Setup Remote Access

This is the remote access basic. NSCLIENT is used for the myLVS communication
between the myLVS host (client) and the real server which are required to run
the NSCLIENT server part. For more information about NRPE please see http://www.nsclient.org

Setup myLVS with the NSClient (the client part)

• On Debian8 run the installation command

root@mylvs01:/# apt-get install nagios-nrpe-plugin -s

• Check to see if the plugin runs without any error, run:

root@mylvs01:/# /usr/lib/nagios/plugins/check_nrpe

Setup the Linux server with the NSClient (the server part)

• Install NSClient Server part to the myLVS client

root@myLVS-LinuxClient:~# apt-get install nagios-nrpe-server

• Add to sudo

nagios ALL=NOPASSWD: /sbin/ipvsadm
nagios ALL=NOPASSWD: /sbin/init

Edit /etc/nagios/nrpe.cfg

• Set Allowed hosts

allowed_hosts=127.0.0.1 192.168.2.100

• Set dont blame

dont_blame_nrpe=1

• Set two new commands, restart web and reboot

command[reset_apache]=/etc/init.d/apache2 restart
command[reboot]=init 6

• Restart nrpe server

root@myLVS-LinuxClient:~# /etc/init.d/nagios-nrpe-server restart

Setup the Windows server with the NSClient (the server part)

Get the Windows client here: http://www.nsclient.org/download

• Install the client, the settings are not that important, just remove the password.

Edit C:\Program Files\NSClient++\nsclient++.ini

• Add to allowed hosts

allowed hosts = 127.0.0.1,::1,192.168.2.100

• SSL options needed for the classic npe client, worst case is to allow only:

ssl options = sslv2,sslv3

• Verify off

verify mode = none

• Insecure true

insecure = true

• Add commands:

[/settings/external scripts/scripts]
reset_iis="C:\Program Files\NSClient++\scripts\resetiis.bat"
reboot="C:\Program Files\NSClient++\scripts\reboot.bat"

Add two new batch files

• C:\Program Files\NSClient++\scripts\reset_iis.bat

iisreset

• C:\Program Files\NSClient++\scripts\reboot

shutdown /r /f

Restart nrpe++ service

Testing the myLVS access

root@mylvs01:/home/demo# /usr/lib/nagios/plugins/check_nrpe -H 192.168.2.221 -p 5666  -c reset_iis
root@mylvs01:/home/demo# /usr/lib/nagios/plugins/check_nrpe -H 192.168.2.222 -p 5666  -c reset_apache
root@mylvs01:/home/demo# /usr/lib/nagios/plugins/check_nrpe -H 192.168.2.221 -p 5666  -c reboot
root@mylvs01:/home/demo# /usr/lib/nagios/plugins/check_nrpe -H 192.168.2.222 -p 5666  -c reboot