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This article will explain in detail how to install Nagios in linux. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

1. Nagios server installation

1. Install the required dependency package

2. Add users and groups required by Nagios

3. Compile and install Nagios and create login Nagios WEB program users

4. Nagios-plugin (plug-in)

5. Configuration service self-starting

Second, configure Nagios to monitor Win host based on NRPE

1. The monitored end

Installation: NSClient++-0.3.9-x64

2. Monitoring end

1. Test connectivity with the monitored side

two。 The monitoring side defines commands, hosts, and services

3. Add the defined template to the nagios.cfg file

4. Restart the service

Third, monitor Linux host based on NRPE

1. The monitored end:

1. Add user

two。 Install the plug-in nagios-plugins-1.4.15

3. Install NRPE

4. Configure NRPE Profil

# vi / usr/local/nagios/etc/nrpe.cfg

5. Define nrpe startup scripts and increase permissions

6. Add self-startup

7. Start the service

2. Configure the monitoring end:

1. Install NRPE

After installation, generate check_nrpe and use this plug-in to test the monitored host

two。 Define command

3. Define hosts and services

4. Add the path to the defined linhost.cfg profile to / usr/localhost/etc/nagios.cfg

5. Test configuration file / usr/local/nagios/bin/nagios-v / usr/local/nagios/etc/nagios.cfg

6. Restart the service

7. Web page to check hosts monitoring status

* for other information about monitoring windows hosts based on NRPE, inquire about online information separately *

1. Install and configure Nagios

1. Solve the dependency of installing Nagios:

# yum-y install httpd gcc glibc glibc-common gd gd-devel php php-mysql mysql mysql-devel mysql-server

2. Add the users and groups needed for nagios to run:

# groupadd nagcmd

# useradd-G nagcmd nagios

# passwd nagios

# usermod-a-G nagcmd apache

3. Compile and install nagios:

# tar zxf nagios-3.3.1.tar.gz

# cd nagios-3.3.1

#. / configure-with-command-group=nagcmd-enable-event-broker

# make all

# make install

# make install-init

# make install-commandmode

# make install-config

# vi / usr/local/nagios/etc/objects/contacts.cfg

Emailnagios@localhost # this is the default setting

# make install-webconf

# htpasswd-c / usr/local/nagios/etc/htpasswd.users nagiosadmin

# service httpd restart

4. Compile and install nagios-plugins

# tar zxf nagios-plugins-1.4.15.tar.gz

# cd nagios-plugins-1.4.15

#. / configure-with-nagios-user=nagios-with-nagios-group=nagios

# make

# make install

5. Configure and start Nagios

# vi / usr/local/nagios/etc/nagios.cfg

# chkconfig-add nagios

# chkconfig nagios on

# / usr/local/nagios/bin/nagios-v / usr/local/nagios/etc/nagios.cfg

# service nagios start

6. Configure selinux

# getenforce

# setenforce 0

7. View nagios through the web interface:

Http://your_nagios_IP/nagios

You need to specify the web authentication account and password set above when you log in.

II. Configuration file

Main configuration file for Nagios

/ usr/local/nagios/etc/nagios.cfg

Nagios template configuration directory

/ usr/local/nagios/etc/objects

Call the check command directory / usr/local/nagios/libexec

Monitoring remote Win hosts based on NSClinet++

1. Installation and configuration of the monitored end

Install NSClient++-0.3.9-x64

2. Test whether it is connected

# cd / usr/local/nagios/libexec

#. / check_nt-H 192.168.1.119-v UPTIME-p 12489

If you have a password, then: #. / check_nt-H 192.168.1.119-v UPTIME-p 12489-s luoxj,123

3. Configure the monitoring end.

& define commands.cfg- definition commands

# cd / usr/local/nagios/etc/objects/

# vi commands.cfg

Define command {

Command_name check_nt

Command_line $USER1 $/ check_nt-H $HOSTADDRESS$-p 12489-v $ARG1 $$ARG2 $

}

& define hosts and services

# vi windows.cfg

Define host {

Use windows-server

Host_name winhost

Alias My Windows Host

Address 192.168.1.119

}

Define service {use generic-service host_name winhost service_description NSClient++ Version check_command checkntasking CLIENTVERSION} defines that the service can be renamed according to the actual situation and can be replaced in vim:., $s@winserver@winhost@g

& & enable the defined file and increase the path of the defined file

# vi / usr/local/nagios/etc/nagios.cfg

Cfg_file=/usr/local/nagios/etc/objects/windows.cfg

& & test to make sure there is nothing wrong with the configuration file

# / usr/local/nagios/bin/nagios-v / usr/local/nagios/etc/nagios.cfg-d

# service nagios restart

Monitoring remote Linux hosts based on NRPE

1. Installation and configuration of the monitored end

1) add nagios users first

# useradd-s / sbin/nologin nagios

2) NRPE depends on nagios-plugins, so you need to install it first

# tar zxf nagios-plugins-1.4.15.tar.gz

# cd nagios-plugins-1.4.15

#. / configure-with-nagios-user=nagios-with-nagios-group=nagios

# make all

# make instal

3) install NRPE

# tar-zxvf nrpe-2.12.tar.gz

# cd nrpe-2.12.tar.gz

#. / configure-with-nrpe-user=nagios\

-- with-nrpe-group=nagios\

-- with-nagios-user=nagios\

-- with-nagios-group=nagios\

-- enable-command-args\

-- enable-ssl

# make all

# make install-plugin

# make install-daemon

# make install-daemon-config

4) configure NRPE

# vim / usr/local/nagios/etc/nrpe.conf

Log_facility=daemon

Pid_file=/var/run/nrpe.pid

Server_address=172.16.100.11

Server_port=5666

Nrpe_user=nagios

Nrpe_group=nagios

Allowed_hosts=172.16.100.1

Command_timeout=60

Connection_timeout=300

Debug=0

& define the command of monitoring object &

Commanded [check _ users] = / usr/local/nagios/libexec/check_users-w 5-c 10

Commanded [check _ load] = / usr/local/nagios/libexec/check_load-w 15leg10 penny 5-c 30pyrmr25 penny 20

Commanded [check _ sda1] = / usr/local/nagios/libexec/check_disk-w 20%-c 10%-p / dev/sda1

Commanded [check _ zombie_procs] = / usr/local/nagios/libexec/check_procs-w 5-c 10-s Z

Commanded [check _ total_procs] = / usr/local/nagios/libexec/check_procs-w 150-c 200

5) start NRPE

# / usr/local/nagios/bin/nrpe-c / usr/local/nagios/etc/nrpe.cfg-d

To facilitate the startup of the NRPE service, you can define the following as a / etc/init.d/nrped script:

# vi / etc/init.d/nrped

#! / bin/bash

# chkconfig: 2345 88 12

# description: NRPE DAEMON

NRPE=/usr/local/nagios/bin/nrpe

NRPECONF=/usr/local/nagios/etc/nrpe.cfg

Case "$1" in

Start)

Echo-n "Starting NRPE daemon..."

$NRPE-c $NRPECONF-d

Echo "done."

Stop)

Echo-n "Stopping NRPE daemon..."

Pkill-u nagios nrpe

Echo "done."

Restart)

$0 stop

Sleep 2

$0 start

*)

Echo "Usage: $0 start | stop | restart"

Esac

Exit 0

# chmod + x / etc/init.d/nrped

# service nrped start

# netstat-tnlp # # check whether nrpe port 5666 is enabled

Tcp 0 0 0.0.0.0 5666 0.0.0.015 * LISTEN 17282/nrpe

# service iptables stop

# setenforce 0

6) configure objects that can be monitored by remote hosts

On the monitored side, the services or resources that can be monitored through NRPE need to be defined by using commands in the nrpe.conf file. The syntax format of the defined command is: command [] =. For example:

Commanded [check _ rootdisk] = / usr/local/nagios/libexec/check_disk-w 20%-c 10%-p /

Commanded [check _ swap] = / usr/local/nagios/libexec/check_disk-w 40%-c 20%

Commanded [check _ sensors] = / usr/local/nagios/libexec/check_sensors

Commanded [check _ users] = / usr/local/nagios/libexec/check_users-w 10-c 20

Commanded [check _ load] = / usr/local/nagios/libexec/check_load-w 10pm 8rem 5-c 20je 18je 15

Commanded [check _ zombies] = / usr/local/nagios/libexec/check_procs-w 5-c 10-s Z

Commanded [check _ all_procs] = / usr/local/nagios/libexec/check_procs-w 150-c 200

2. Configure the monitoring end

1) install NRPE

# tar-zxvf nrpe-2.12.tar.gz

# cd nrpe-2.12.tar.gz

#. / configure-with-nrpe-user=nagios\

-- with-nrpe-group=nagios\

-- with-nagios-user=nagios\

-- with-nagios-group=nagios\

-- enable-command-args\

-- enable-ssl

# make all

# make install-plugin

After the installation is complete, / usr/local/nagios/libexec/check_nrpe generates this plug-in to test whether the client is working properly

# cd / usr/local/nagios/libexec/

#. / check_nrpe-H 192.168.1.124

NRPE v2.12

2) define how to monitor remote hosts and services:

To monitor a remote Linux host through NRPE, you need to use the chech_nrpe plug-in. The syntax format is as follows:

Check_nrpe-H [- n] [- u] [- p] [- t] [- c] [- a]

Define commands to monitor remote Linux hosts:

# vi / usr/local/nagios/etc/objects/commands.cfg add nrpe command

Define command {

Command_name check_nrpe

Command_line $USER1 $/ check_nrpe-H $HOSTADDRESS$-c $ARG1 $

}

* create a template file *

# cd / usr/local/nagios/etc/objects/

# vim linhost.cfg or # cp localhost.cfg linhost.cfg

* define remote Linux hosts:

Define host {

Use linux-server

Host_name linhost

Alias my Linux Host

Address 192.168.1.124

}

Comment if the host group does not need it To add a service, you can refer to the command [check _ users] = / usr/local/nagios/libexec/check_users-w 5-c 10 command [check _ load] = / usr/local/nagios/libexec/check_load-w 15 command 10 usr/local/nagios/libexec/check_disk 5-c 30 sda1 25, 20 command [check _ sda1] = / usr/local/nagios/libexec/check_disk-w 20%-c 10%-p / dev/ sda1 command [check _ zombie_procs] = / usr/local / nagios/libexec/check_procs-w 5-c 10-s Zcommand [check _ total_procs] = / usr/local/nagios/libexec/check_procs-w 150-c 200 for detailed configuration service * define remote Linux service: you can also add parameters to set and monitor

Define service {

Use generic-service host_name linhost service_description check_users check_command check_nrpe!check_users} # Create a service for monitoring the uptime of the server

# Change the host_name to match the name of the host you defined abovedefine service {use generic-service host_name linhost service_description load check_command check_nrpe!check_load} # Create a service for monitoring CPU load

# Change the host_name to match the name of the host you defined abovedefine service {use generic-service host_name linhost service_description sda1 check_command check_nrpe!check_sda1} # Create a service for monitoring memory usage

# Change the host_name to match the name of the host you defined abovedefine service {use generic-service host_name linhost service_description Zombie check_command checknrpetual checkpointing zombiechecking procs} define service {use generic-service host_name linhost service_description Total procs check_command checkingnrpeaking checkpointing totalizing procs} 3) add the set linhost.cfg file to / usr/local/nagios/etc/nagios.cfg # vi / usr/local/nagios/etc/nagios.cfg

Cfg_file=/usr/local/nagios/etc/objects/linhost.cfg

4) Test the configuration file # / usr/local/nagios/bin/nagios-v / usr/local/nagios/etc/nagios.cfg5) restart the service # service nagios restart

This is the end of the article on "how to install Nagios in linux". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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