Mukesh at 11:16, 15 February 2016

2016-02-15T11:16:06Z

Mithilesh: Created page with "'''STEPS TO CONFIGURE NRPE AND NRPE PLUGIN ON CLIENT MACHINE:-''' ON CLIENT MACHINE: Install libraries for dependencies as it would help in compiling the NRPE packages. ..."

2015-02-06T13:34:58Z

Created page with "'''STEPS TO CONFIGURE NRPE AND NRPE PLUGIN ON CLIENT MACHINE:-''' ON CLIENT MACHINE: Install libraries for dependencies as it would help in compiling the NRPE packages. ..."

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'''STEPS TO CONFIGURE NRPE AND NRPE PLUGIN ON CLIENT MACHINE:-'''

ON CLIENT MACHINE:

Install libraries for dependencies as it would help in compiling the NRPE packages.

Step 1- install libraries

# yum install -y gcc glibc glibc-common gd gd-devel make net-snmp openssl-devel

step 2- user and password

# useradd nagios
# passwd nagios

step 3-extract plugins

# tar –xvf nagios-plugins-1.5.tar.gz

step 4- compile and install
# cd nagios-plugins-1.5
# ./configure
# make
# make install
step 5-permissions on plugins

# chown nagios.nagios /usr/local/nagios
# chown -R nagios.nagios /usr/local/nagios/libexec
step 6-install xinetd

#yum install xinetd

step 7-install nrpe

tar xzf nrpe-2.15.tar.gz
# cd nrpe-2.15
# ./configure
# make all
# make install-plugin
# make install-daemon
# make install-daemon-config
#make install-xinetd

step 8-add nagios monitoring server ip

#vim /etc/xinetd.d/nrpe
add only_from = 127.0.0.1 <nagios_ip_address>
#vim /etc/service
add nrpe 5666/tcp #NRPE

step 9-restart xinetd

#/etc/init.d/xinetd restart

step 10-verify nrpe daemon

# netstat -at | grep nrpe

tcp 0 0 *:nrpe *:* LISTEN

step 11-To check nrpe daemon is workig properly

# /usr/local/nagios/libexec/check_nrpe -H localhost
NRPE v2.15

step 12- customize nrpe commands and add commands

# vim /usr/local/nagios/etc/nrpe.cfg
command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/mapper/vg_mail1-LogVol01
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
command[check_cpu]=/usr/local/nagios/libexec/check_cpu.sh -w 60 -c 70
command[check_mem]=/usr/local/nagios/libexec/check_mem_avail -w 10 -c 5
command[check_queue]=/usr/local/nagios/libexec/check_postfix_queue -w 200 -c 250
command[check_zimbra_lmtp]=/usr/local/nagios/libexec/check_smtp -H localhost -p 7025 -e '220 node.sandhar.in Zimbra LMTP server ready'
command[check_smtp]=/usr/local/nagios/libexec/check_smtp -H localhost

step 13 -run /etc/init.d/xinetd restart

step 14 – reload nagios on nagios server:
#/etc/init.d/nagios reload

step 15 -After then we should call all services from nagios server:
# /usr/local/nagios/libexec/check_nrpe -H 172.17.16.22 -c check_zimbra_lmtp
ERROR: could not complete SSL handshake
# /usr/local/nagios/libexec/check_nrpe -H 172.17.16.22 -c check_smtp
ERROR: could not complete SSL handshake

That means we are not able to call services from nagios server to client machine. This is happening because of openssl library missing. For this we need to run nrpe as daemon with non ssl. The command is:
# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d -n
Now in future whenever we will add services of mailserver in sandhar, we need to follow below steps:

step 16-kill the nrpe running and run nrpe as daemon.
# ps -elf | grep nrpe
0 S root 747 15083 0 80 0 - 25813 pipe_w 10:59 pts/0 00:00:00 grep nrpe
5 S nagios 22682 1 0 80 0 - 9810 poll_s Feb02 ? 00:00:00 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d -n

# kill -9 22682
# /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d -n

step -17 Now test from nagios server.
# /usr/local/nagios/libexec/check_nrpe -H 172.17.16.22 -c check_zimbra_lmtp
SMTP OK - 0.001 sec. response time|time=0.000956s;;;0.000000

# /usr/local/nagios/libexec/check_nrpe -H 172.17.16.22 -c check_smtp
SMTP OK - 0.002 sec. response time|time=0.002258s;;;0.000000

# /usr/local/nagios/libexec/check_nrpe -H 172.17.16.22 -c check_cpu
OK - user: 23.22, nice: 1.11, sys: 2.95, iowait: 0.62, irq: 0.50, softirq: 0.74 idle: 74.33 | 'user'=23.22 'nice'=1.11 'sys'=2.95 'softirq'=0.74 'iowait'=0.62 'irq'=0.50 'idle'=74.33

# /usr/local/nagios/libexec/check_nrpe -H 172.17.16.22 -c check_queue
33 mail(s) in queue | mail_queue=33

step 18- Add host on nagios server of sandhar.
# vim /usr/local/nagios/etc/objects/linux-box.cfg
define host{
use linux-server
host_name CORP-MAILSERVER
alias CORP-MAILSERVER
address 172.17.16.22
hostgroups Windows Server
}

step 19- Add services on nagios server.

define service{
use generic-service
host_name CORP-MAILSERVER
service_description Current Users
notification_options w,u,c,r
check_command check_nrpe!check_users
}

define service{
use generic-service
host_name CORP-MAILSERVER
service_description Server Load
notification_options w,u,c,r
check_command check_nrpe!check_load
}
define service{
use generic-service
host_name CORP-MAILSERVER
service_description Disk Space
notification_options w,u,c,r
check_command check_nrpe!check_hda1
}
define service{
use generic-service
host_name CORP-MAILSERVER
service_description Zombie process
notification_options w,u,c,r
check_command check_nrpe!check_zombie_procs
}
define service{
use generic-service
host_name CORP-MAILSERVER
service_description CPU Load
notification_options w,u,c,r
check_command check_nrpe!check_cpu
}
define service{
use generic-service
host_name CORP-MAILSERVER
service_description Memory Utilization
notification_options w,u,c,r
check_command check_nrpe!check_mem
}
define service{
use generic-service
host_name CORP-MAILSERVER
service_description Mail Queue
notification_options w,u,c,r
check_command check_nrpe!check_queue
}
define service{ use generic-service
host_name CORP-MAILSERVER
service_description Mail Queue
notification_options w,u,c,r
check_command check_nrpe!check_queue
}
define service{
use generic-service
host_name CORP-MAILSERVER
service_description LMTP
notification_options w,u,c,r
check_command check_nrpe!check_zimbra_lmtp
}

define service{
use generic-service
host_name CORP-MAILSERVER
service_description SMTP
notification_options w,u,c,r
check_command check_smtp
}

step 20- verify the nagios.cfg file.

# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
Checking services...
Checked 815 services.
Checking hosts...
Checked 108 hosts.
Checking host groups...
Checked 5 host groups.
Checking service groups...
Checked 0 service groups.
Checking contacts...
Checked 16 contacts.
Checking contact groups...
Checked 12 contact groups.
Checking service escalations...
Checked 2962 service escalations.
Checking service dependencies...
Checked 0 service dependencies.
Checking host escalations...
Checked 0 host escalations.
Checking host dependencies...
Checked 0 host dependencies.
Checking commands...
Checked 70 commands.
Checking time periods...
Checked 6 time periods.
Checking for circular paths between hosts...
Checking for circular host and service dependencies...
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...

Total Warnings: 0
Total Errors: 0

If we get below error in the escalation.cfg file that means there is empty services defined for any host. For this we need to check config file.
ERROR: could not expand the services defined in ‘service escalation’ config ( /usr/local/nagios/etc/objects/escalation.cfg )

First disable the escalation.cfg in nagios.cfg file:
#cfg_file=/usr/local/nagios/etc/objects/escalation.cfg
Second verify the config file nagios.cfg file:
# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
It will show you the warning like this:
Checking host escalations...
Checked 0 host escalations.
Checking host dependencies...
Warning: ‘node1.sandhar.in’
Checking commands...
Checked 70 commands.

To resolve this either you define the services for that host or disable that host. And verify the nagios.cfg file.
If total warnings is 0 and total errors is 0 then reload nagios.

# /etc/init.d/nagios reload

← Older revision		Revision as of 11:16, 15 February 2016
Line 69:		Line 69:

	# vim /usr/local/nagios/etc/nrpe.cfg		# vim /usr/local/nagios/etc/nrpe.cfg
	command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10		command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
	command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20		command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
	command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/mapper/vg_mail1-LogVol01		command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/mapper/vg_mail1-LogVol01
	command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z		command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
	command[check_cpu]=/usr/local/nagios/libexec/check_cpu.sh -w 60 -c 70		command[check_cpu]=/usr/local/nagios/libexec/check_cpu.sh -w 60 -c 70
	command[check_mem]=/usr/local/nagios/libexec/check_mem_avail -w 10 -c 5		command[check_mem]=/usr/local/nagios/libexec/check_mem_avail -w 10 -c 5
	command[check_queue]=/usr/local/nagios/libexec/check_postfix_queue -w 200 -c 250		command[check_queue]=/usr/local/nagios/libexec/check_postfix_queue -w 200 -c 250
	command[check_zimbra_lmtp]=/usr/local/nagios/libexec/check_smtp -H localhost -p 7025 -e '220 node.sandhar.in Zimbra LMTP server ready'		command[check_zimbra_lmtp]=/usr/local/nagios/libexec/check_smtp -H localhost -p 7025 -e '220 node.sandhar.in Zimbra LMTP server ready'
	command[check_smtp]=/usr/local/nagios/libexec/check_smtp -H localhost		command[check_smtp]=/usr/local/nagios/libexec/check_smtp -H localhost

	step 13 -run /etc/init.d/xinetd restart		step 13 -run /etc/init.d/xinetd restart
Line 96:		Line 96:
	step 16-kill the nrpe running and run nrpe as daemon.		step 16-kill the nrpe running and run nrpe as daemon.
	# ps -elf \| grep nrpe		# ps -elf \| grep nrpe
	0 S root 747 15083 0 80 0 - 25813 pipe_w 10:59 pts/0 00:00:00 grep nrpe		0 S root 747 15083 0 80 0 - 25813 pipe_w 10:59 pts/0 00:00:00 grep nrpe
	5 S nagios 22682 1 0 80 0 - 9810 poll_s Feb02 ? 00:00:00 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d -n		5 S nagios 22682 1 0 80 0 - 9810 poll_s Feb02 ? 00:00:00 /usr/local /nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d -n

	# kill -9 22682		# kill -9 22682

NRPE-AND-NRPE-PLUGIN-ON-CLIENT-MACHINE(SANDHAR) - Revision history

Mukesh at 11:16, 15 February 2016

Mithilesh: Created page with "'''STEPS TO CONFIGURE NRPE AND NRPE PLUGIN ON CLIENT MACHINE:-''' ON CLIENT MACHINE: Install libraries for dependencies as it would help in compiling the NRPE packages. ..."