SERVER
SIDE CONFIGURATION:
01. Go to
config file location.
]# cd
/usr/local/nagios/etc/servers
02. Create
a new file and paste contents of sample file (sample file is attached
with this folder). Now, comment or remove services that you don't
need.
]# vim
something-hostname.cfg
03. Add
this host to hostgroup.
]# vim
hostgroup.cfg
define host{
use linux-server
host_name MOMS-WEB2-54.169.82.120
alias MOMS-WEB2-54.169.82.120
address 54.169.82.120
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
service_description PING
check_command check_ping!1000.0,40%!3000.0,80%
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
service_description MEMORY
check_command check_nrpe!check_mem
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
service_description CPU
check_command check_nrpe!check_cpu_perf
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
normal_check_interval 30
service_description CPU Load
check_command check_nrpe!check_load
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
normal_check_interval 30
service_description PROCESSES
check_command check_nrpe!check_total_procs
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
service_description PROCESS-Z
check_command check_nrpe!check_zombie_procs
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
normal_check_interval 30
service_description DISK
check_command check_nrpe!check_disk
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
normal_check_interval 30
service_description USERS
check_command check_nrpe!check_users
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
service_description Uptime
check_command check_nrpe!check_uptime
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
service_description HTTP
check_command check_tcp!80
contact_groups awsmoms,admins
}
define service{
use generic-service
host_name MOMS-WEB2-54.169.82.120
service_description MYSQL
check_command check_tcp!3306
contact_groups awsmoms,admins
}
:wq
4. Reload
configuration.
]#
service nagios reload
CLIENT
SIDE CONFIGURATION (login as root user):
00.
Install required packages.
]# yum
install openssl-devel gcc xinetd make glibc
01. Create
a directory to download rpm packages.
]#
mkdir ~/downloads
02. Go to
download folder.
]# cd
~/downloads
03.
Download NRPE.
04.
Download Nagios Plugins.
05.
Extract Nagios Plugins.
]# tar
-xzf nagios-plugins-2.0.3.tar.gz
06. Go to
extracted folder.
]# cd
nagios-plugins-2.0.3
# useradd nagios
07.
Configure plugins.
]#
./configure --with-nagios-user=nagios --with-nagios-group=nagios
08.
Compile it.
]# make
&& make install
09. Change
ownership of nagios plugins folder.
]#
chown -R nagios:nagios /usr/local/nagios/libexec
10. Now
again go to downloads folder.
]# cd
~/downloads
11.
Extract NRPE.
]# tar
-xzf nrpe-2.14.tar.gz
12. Go to
NRPE extracted folder.
]# cd
nrpe-2.14
13.
Configure it.
]#
./configure
14.
Compile it.
]# make
all
15.
Install plugin configuration.
]# make
install-plugin
16.
Install NRPE service.
]# make
install-daemon
17.
Install NRPE service configuration files.
]# make
install-daemon-config
18.
Install xinetd service. Because NRPE runs behind xinetd service.
]# make
install-xinetd
19. Edit
the services file, and add below line at end of file.
]# vim
/etc/services
nrpe
5666/tcp # NRPE
:wq
20. Open
the file and add ip of nagios server.
]# vim
/etc/xinetd.d/nrpe
only_from = 127.0.0.1 54.169.60.32 <-- nagios ip
:wq
21. Start
xinetd service.
]#
service xinetd start
22. Make
NRPE service live after server reboot.
]#
chkconfig xinetd on
Note, now
open port 5666 on client machine for nagios server.
Note,
'check_mem' and 'check_cpu_perf' plugins are not
installed by default. You need to download from nagios website (OR we
have already downloaded in folder with this notes) and copy under
"/usr/local/nagios/libexec" folder. After copy, set
full permissions on it. You may set full permissions with command,
23. Change
the ownership/permissions of newly uploaded plugins.
]#
chmod -R 777 /usr/local/nagios/libexec/* ; chown -R nagios:nagios
/usr/local/nagios/libexec/*
24. Now go
to NRPE configuration directory.
]# cd
/usr/local/nagios/etc/
25. Open
NRPE configuration file.
]# vim
nrpe.cfg
command[check_users]=/usr/local/nagios/libexec/check_users
-w 4 -c 5
command[check_load]=/usr/local/nagios/libexec/check_load
-w 15,10,5 -c 30,25,20
command[check_disk]=/usr/local/nagios/libexec/check_disk
-w 16% -c 15%
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs
-w 5 -c 10 -s Z
command[check_total_procs]=/usr/local/nagios/libexec/check_procs
-w 140 -c 150
command[check_mem]=/usr/local/nagios/libexec/check_mem
-w 65,24 -c 75,25
command[check_cpu_perf]=/usr/local/nagios/libexec/check_cpu_perf
command[check_uptime]=/usr/local/nagios/libexec/check_uptime
:wq
NOTE
: Above you can set % for alert.
26.
Restart xinetd restart.
]#
service xinetd restart
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