Nagios installation and configuration in Linux

Source: Internet
Author: User
Tags ssh

The company needs to build a monitoring platform in the near future, the main purpose is to realize the Server service or load abnormal timely alarm function, after the choice finally decided to use Nagios implementation
Install Nagios Core

The code is as follows Copy Code

Yum-y install gcc glibc glibc-common gd gd-devel php openssl-devel httpd
Useradd-m Nagios #添加一个名为nagios的用户来运行nagios
Usermod-a-G Nagios Apache #将运行apache用户apache加入nagios组
wget http://ssh.xj123.info/monitor/nagios-3.5.0.tar.gz
TAR-ZXF nagios-3.5.0.tar.gz
Mkdir/etc/httpd/conf/extra//For storing HTTP configuration files on Nagios
CD Nagios
./configure--prefix=/usr/local/nagios/--with-comman-group=nagios--with-httpd-conf=/etc/httpd/conf/extra/// Specify the configuration directory for the installation directory and users, groups, and HTTP
Make All&&make Install
Make Install-init;make install-config;make install-commandmode;make install-webconf//Initial build startup scripts, configuration files, Configuration files for command configuration modules and httpd

Install Nagios Plugins

The code is as follows Copy Code

wget http://ssh.xj123.info/monitor/nagios-plugins-1.5.tar.gz
TAR-ZXF nagios-plugins-1.5.tar.gz
CD nagios-plugins-1.5
./configure--with-nagios-user=nagios--with-nagios-group=nagios--prefix=/usr/local/nagios///Specify installation directory and users and groups
Make All&&make Install

Configure Apache

The code is as follows Copy Code

Htpasswd-c/usr/local/nagios/etc/htpasswd.users nagiosadmin//Create login username nagiosadmin and password, username and password for Web login
Vim/etc/httpd/conf/httpd.conf #添加如下行, let nagios.conf take effect

Include conf/extra/nagios.conf

Start all services

The code is as follows Copy Code

Chkconfig--add Nagios
Chkconfig Nagios on
Chkconfig httpd on
Service Nagios Start
Service httpd Start

Install Nrpe

Client Install Nagios Plugin

The code is as follows Copy Code

Useradd-s/sbin/nologin Nagios//Add Nagios User
Cd/usr/local/src
Tar zxvf nagios-plugins-1.4.16.tar.gz
CD nagios-plugins-1.4.16
./configure--with-nagios-user=nagios--with-nagios-group=nagios--prefix=/usr/local/nagios///Specify the installation directory and run the software users and groups
Make&&make Install

Client Installation Nrpe

The code is as follows Copy Code

wget http://nchc.dl.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.14/nrpe-2.14.tar.gz
TAR-ZXF nrpe-2.14.tar.gz
CD nrpe-2.14
./configure--with-nagios-user=nagios--with-nagios-group=nagios--prefix=/usr/local/nagios/
Make all
Make Install-plugin;make Install-daemon;make install-daemon-config
ls/usr/local/nagios/libexec///Verify Installation

Client configuration, startup, test Nrpe

  code is as follows copy code

cd/usr/local/nagios/
Vim etc/nrpe.cfg
 
#找到allowed_ Hosts add server-side ip:allowed_hosts=127.0.0.1,23. Monitor server IP
 
/usr/local/nagios/bin/nrpe-c/usr/local/nagios/ etc/nrpe.cfg–d //Start Nrpe daemon
NETSTAT-UTPLN |grep nrpe       // To see if the Nrpe process has started normally
 
    TCP 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN 17619/nrpe
 
Echo/U Sr/local/nagios/bin/nrpe-c/usr/local/nagios/etc/nrpe.cfg-d ">>/etc/rc.local    / Add Nrpe to boot automatically
/usr/local/nagios/libexec/check_nrpe-h 127.0.0.1
    Nrpe v2.14    //nrpe test results, this result is that Nrpe is working correctly

Customizing monitoring content

The code is as follows Copy Code
Vim/usr/local/nagios/etc/nrpe.cfg

Command[check_users]=/usr/local/nagios/libexec/check_users-w 5-c #监控登陆的用户数量
Command[check_load]=/usr/local/nagios/libexec/check_load-w 15,10,5-c 30,25,20 #监控CPU的负载
Command[check_sda2]=/usr/local/nagios/libexec/check_disk-w 20%-C 10%-p/dev/sda2 #监控磁盘利用率, where the sda2 must be the actual hard disk partition, can use Fdisk–l to check
Command[check_swap]=/usr/local/nagios//libexec/check_swap-w 20-c #监控交换空间
Command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs-w 5-c 10-s Z #监控进程中的僵尸进程
Command[check_total_procs]=/usr/local/nagios/libexec/check_procs-w 150-c #监控所有进程


Note: The content in parentheses after the command is defined as a variable, and the variable name can be specified arbitrarily, only as long as it is consistent with the server configuration file.

Server-side Install Nrpe plugin

The code is as follows Copy Code

wget http://ssh.xj123.info/monitor/nrpe-2.14.tar.gz
TAR-ZXF nrpe-2.14.tar.gz
CD nrpe-2.14
./configure--with-nagios-user=nagios-with-nagios-group=nagios--prefix=/usr/local/nagios/
Make All;make Install-plugin; Make Install-daemon;make install-daemon-config//install Check_nrpe plugin to/usr/local/nagios/libexec/directory
/usr/local/nagios/libexec/check_nrpe-h Client IP

NRPE v2.14//This result indicates that it can communicate with client

Configuring Nagios servers to support remote monitoring

Add a Monitor Host

The code is as follows Copy Code

Cd/usr/local/nagios/etc/objects
Vim Host.cfg

Define Host{
Use Linux-server
HOST_NAME Slaves
Address 192.168.8.15
}

Define the services to be monitored

The code is as follows Copy Code

# vim Services.cfg #定义要监控的服务
Define Service{
Use Local-service
HOST_NAME Slaves
Service_description http
Check_command check_http
}

Add Definition Check_nrpe Command

The code is as follows Copy Code

Vim Commands.cfg #定义check_nrpe监控命令
Define Command{
Command_name Check_nrpe
Command_line $USER 1$/check_nrpe-h $HOSTADDRESS $-C $ARG 1$
}

Add Host.cfg and Ervices.cfg to Nagios.cfg

The code is as follows Copy Code

Cd/usr/local/nagios/etc
Vim Nagios.cfg
Cfg_file=/usr/local/nagios//etc/objects/host.cfg
Cfg_file=/usr/local/nagios//etc/objects/services.cfg

Modify Accept Alert Mailbox

The code is as follows Copy Code

Vim Contacts.cfg
Email test@test.com; #请修改为自己的邮箱地址

Test and start Nagios service

The code is as follows Copy Code

/usr/local/nagios/bin/nagios-v/usr/local/nagios/etc/nagios.cfg #检测配置文件是否正确

Total warnings:0
Total errors:0 #结果表示配置无错误

Service Nagios Restart #重启Nagios服务

Vim Contacts.cfg
Email test@test.com; #请修改为自己的邮箱地址

Test and start Nagios service

  code is as follows copy code

/usr/local /nagios/bin/nagios-v/usr/local/nagios/etc/nagios.cfg #检测配置文件是否正确
 
    Total warnings:0
    Total errors:0 #结果表示配置无错误
 
Service nagios restart #重启Nagios服务

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