Centos 7下Nagios的安装及配置

简介

Nagios 是一款自动化运维工具，可以协助运维人员监控服务器的运行状况，并且拥有报警功能。本文章将介绍其安装方法和详细的配置方法。

nagios 监控服务应用指南

本地资源：负载，CPU，磁盘，内存。IO，RAID，温度，passwd文件变化，本地所有文件指纹识别

网络服务：端口，URL，丢包，进程，网络流量

其他设备：交换机，打印机，windows等。

业务数据：用户登录失败次数，用户登录网站次数，输入验证码失败的次数，某个API接口流量并发，电商网站订单，支付交易的数量

nagios成员：主程序nagios，插件nagios-plugins，和一些可选的客户端nrpe，NSClient++,NSCA和NDOUtils

NRPE--半被动模式

存放位置：安装在客户端

NRPE作用：在客户端执行相关的脚本插件来获取数据，实现对客户端主机资源的监控。

存在形式：守护进程(agent)模式，开启的端口5666

NSClient++：半被动模式，相当于linux系统的nrpe

NDOUtils（不推荐用）

存在位置：服务端

作用：用于将nagios的配置信息和各event产生的数据存入数据库中，以实现对这些数据的检索和处理。

NSCA：纯被动模式--->用在分布式监控环境中

位置：NSCA需要同时安装在nagios的服务器端和客户端

软件版本

nagios版本：4.3.

nagios-plugins版本：2.2.

nrpe版本：3.1.

实现环境

nagios运行在LAMP环境下（如果还没有安装LAMP环境，可以参考下我的安装LNMP文章，因为我已经编译安装了php和Mysql，本文直接采取yum 方式安装apache，当然也可以采取编译方式安装apache。看个人喜好和公司需求）

Centos版本：CentOS Linux release 7.3. (Core) 64位

Apache版本：Apache/2.4.

Nginx版本: nginx 1.12.

Mysql版本：mysql 5.7.

PHP版本：php 7.1.

下载nagios软件及插件包

下载慢的话可以去我的网盘下载

[root@nagios ~]# cd /software/

[root@nagios software]# wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.3.1.tar.gz

[root@nagios software]# wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz

[root@nagios software]# wget https://sourceforge.net/projects/nagios/files/nrpe-3.x/nrpe-3.1.0.tar.gz

[root@nagios software]# ll

-rw-r--r--    root  root   4月   : nagios-4.3..tar.gz

-rw-r--r--    root  root    4月   : nagios-plugins-2.2..tar.gz

-rw-r--r--    root  root     4月   : nrpe-3.1..tar.gz

安装nagios-server服务端

安装依赖包

[root@nagios software]# yum -y install httpd httpd-devel gcc glibc glibc-common gd gd-devel perl-devel perl-CPAN fcgi perl-FCGI perl-FCGI-ProcManager

解压nagios源码包

[root@nagios software]# tar zxvf nagios-4.3..tar.gz

进入解压后的目录

[root@nagios software]# cd nagios-4.3./

创建ngaios用户和组（把nginx启动用户www加入到nagios相关组）

[root@nagios nagios-4.3.]# useradd nagios -s /sbin/nologin

[root@nagios nagios-4.3.]# id www

[root@nagios nagios-4.3.]# groupadd nagcmd

[root@nagios nagios-4.3.]# usermod -a -G nagcmd nagios

[root@nagios nagios-4.3.]# usermod -a -G nagcmd www

[root@nagios nagios-4.3.]# id -n -G nagios

[root@nagios nagios-4.3.]# id -n -G www

配置nagios

[root@client1 nagios-4.3.]# ./configure --with-command-group=nagcmd

编译和安装

[root@nagios nagios-4.3.]# make all

[root@nagios nagios-4.3.]# make install-init

[root@nagios nagios-4.3.]# make install-commandmode

[root@nagios nagios-4.3.]# make install-config

[root@nagios nagios-4.3.]# make install

[root@nagios nagios-4.3.]# cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/

[root@nagios nagios-4.3.]# chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers

[root@nagios nagios-4.3.]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

生成apache配置文件

[root@nagios nagios-4.3.]# make install-webconf

/usr/bin/install -c -m  sample-config/httpd.conf /etc/httpd/conf.d/nagios.conf

if [  -eq  ]; then \

    ln -s /etc/httpd/conf.d/nagios.conf /etc/apache2/sites-enabled/nagios.conf; \

fi



*** Nagios/Apache conf file installed ***

生成nagios web界面的验证信息

[root@nagios nagios-4.3.]# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagios

New password:   ==> 输入密码，这里我输入的密码是nagios，记住这个密码

Re-type new password:  ==> 确认密码

Adding password for user nagios

修改apache配置文件
vi /etc/httpd/conf/httpd.conf

Listen     ===>    修改为    Listen

User apache    ===>    修改为    User www

Group apache    ===>    修改为    Group www

DirectoryIndex index.html    ===>    修改为    DirectoryIndex index.php index.html

AddType application/x-gzip .gz .tgz    ===>    下面添加一行内容  AddHandler application/x-httpd-php .php

# LoadModule foo_module modules/mod_foo.so    ===>    下面添加一行内容

 LoadModule php7_module        modules/libphp7.so

apache配置文件参考

[root@nagios httpd]# grep -v '^$' /etc/httpd/conf/httpd.conf|grep -v '#'

ServerRoot "/etc/httpd"

Listen

LoadModule php7_module        modules/libphp7.so

Include conf.modules.d/*.conf

User www

Group www

ServerAdmin root@localhost

<Directory />

    AllowOverride none

    Require all denied

</Directory>

DocumentRoot "/var/www/html"

<Directory "/var/www">

    AllowOverride None

    Require all granted

</Directory>

<Directory "/var/www/html">

    Options Indexes FollowSymLinks

    AllowOverride None

    Require all granted

</Directory>

<IfModule dir_module>

    DirectoryIndex index.php index.html

</IfModule>

<Files ".ht*">

    Require all denied

</Files>

ErrorLog "logs/error_log"

LogLevel warn

<IfModule log_config_module>

    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined

    LogFormat "%h %l %u %t \"%r\" %>s %b" common

    <IfModule logio_module>

      LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio

    </IfModule>

    CustomLog "logs/access_log" combined

</IfModule>

<IfModule alias_module>

    ScriptAlias /cgi-bin/ "/var/www/cgi-bin/"

</IfModule>

<Directory "/var/www/cgi-bin">

    AllowOverride None

    Options None

    Require all granted

</Directory>

<IfModule mime_module>

    TypesConfig /etc/mime.types

    AddType application/x-compress .Z

    AddType application/x-gzip .gz .tgz

    AddHandler application/x-httpd-php .php

    AddType text/html .shtml

    AddOutputFilter INCLUDES .shtml

</IfModule>

AddDefaultCharset UTF-8

<IfModule mime_magic_module>

    MIMEMagicFile conf/magic

</IfModule>

EnableSendfile on

IncludeOptional conf.d/*.conf

重新编译一下php，使其直接apache（也就是编译参数加上--with-apxs2）

[root@nagios nagios-4.3.]# cd /software/php-7.1./

[root@nagios php-7.1.]# ./configure --prefix=/usr/local/php --enable-fpm --with-fpm-user=nginx --with-fpm-group=nginx --with-mysqli --with-zlib --with-curl --with-gd --with-jpeg-dir --with-png-dir --with-freetype-dir --with-openssl --enable-mbstring --enable-xml --enable-session --enable-ftp --enable-pdo -enable-tokenizer --enable-zip --with-apxs2

[root@nagios php-7.1.]# make && make install

[root@nagios php-7.1.]# cd /etc/httpd/

[root@nagios httpd]# ll /etc/httpd/modules/libphp7.so

-rwxr-xr-x  root root  4月   : /etc/httpd/modules/libphp7.so    ===>    可以看到这个模块已经生成

启动apache

[root@nagios httpd]# systemctl start httpd

[root@nagios httpd]# systemctl enable httpd

启动nagios

chkconfig nagios on

/etc/init.d/nagios start

在浏览器输入ip:8080/nagios测试nagios-web页面是否可以打开

安装nagios-plugins插件
解压nagios-plugins源码包

[root@nagios httpd]# cd /software/

[root@nagios software]# tar zxvf nagios-plugins-2.2..tar.gz

进入解压后的目录进行配置

[root@nagios software]# cd nagios-plugins-2.2./

[root@nagios nagios-plugins-2.2.]# ./configure --with-nagios-user=nagios --with-nagios-group=nagcmd --enable-perl-modules

编译及安装

[root@nagios nagios-plugins-2.2.]# make && make install

安装nrpe
解压nrpe源码包

[root@nagios nagios-plugins-2.2.]# cd /software/

[root@nagios software]# tar zxvf nrpe-3.1..tar.gz

进去解压后的目录进行配置

[root@nagios software]# cd nrpe-3.1./

[root@nagios nrpe-3.1.]# ./configure

编译及安装

[root@nagios nrpe-3.1.]# make all

[root@nagios nrpe-3.1.]# make install-plugin

[root@nagios nrpe-3.1.]# make install-daemon

[root@nagios nrpe-3.1.]# make install-daemon-config

[root@nagios nrpe-3.1.]# cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg

安装完成后，查看下libexec下面是否有插件

[root@nagios nrpe-3.1.]# ls /usr/local/nagios/libexec/

check_apt       check_flexlm        check_log          check_ntp_peer  check_smtp    disable_active_service_checks

check_breeze    check_fping         check_mailq        check_ntp_time  check_spop    disable_notifications

check_by_ssh    check_ftp           check_mrtg         check_nwstat    check_ssh     distributed-monitoring

check_clamd     check_http          check_mrtgtraf     check_oracle    check_ssmtp   enable_active_service_checks

check_cluster   check_icmp          check_mysql        check_overcr    check_swap    enable_notifications

check_dhcp      check_ide_smart     check_mysql_query  check_ping      check_tcp     eventhandlers

check_dig       check_ifoperstatus  check_nagios       check_pop       check_time    negate

check_disk      check_ifstatus      check_nntp         check_procs     check_udp     redundancy-scenario1

check_disk_smb  check_imap          check_nntps        check_real      check_ups     submit_check_result

check_dns       check_ircd          check_nrpe         check_rpc       check_uptime  urlize

check_dummy     check_jabber        check_nt           check_sensors   check_users   utils.pm

check_file_age  check_load          check_ntp          check_simap     check_wave    utils.sh

启动nrpe，并测试服务端本地是否可以连通

[root@nagios nrpe-3.1.]# /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg

[root@nagios nrpe-3.1.]# echo "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg" >> /etc/rc.local

[root@nagios nrpe-3.1.]# chmod +x /etc/rc.d/rc.local           # centos 7下需要这一步， 不然/etc/rc.local中的内容开机可能不执行

[root@nagios nrpe-3.1.]# netstat -lnput|grep

tcp               0.0.0.0:            0.0.0.0:*               LISTEN      /nrpe

tcp6              :::                 :::*                    LISTEN      /nrpe

[root@nagios nrpe-3.1.]# /usr/local/nagios/libexec/check_nrpe -H localhost

NRPE v3.1.0-rc1

<br />

nagios客户端的安装

下载nagios-plugin和nrpe插件

[root@client1 ~]# mkdir /software/

[root@client1 ~]# cd /software/

[root@client1 software]# wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz

[root@client1 software]# wget https://sourceforge.net/projects/nagios/files/nrpe-3.x/nrpe-3.1.0.tar.gz

安装nagios-plugin
安装依赖包

[root@client1 software]# yum install perl-devel perl-CPAN -y

创建用户

[root@client1 software]# useradd nagios -M -s /sbin/nologin

解压nagios-plugin源码包

[root@client1 software]# tar zxvf nagios-plugins-2.2..tar.gz

进入解压后的目录进行配置

[root@client1 software]# cd nagios-plugins-2.2./

[root@client1 nagios-plugins-2.2.]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-perl-modules

编译及安装

[root@client1 nagios-plugins-2.2.]# make && make install

安装nrpe插件
解压nrpe源码包

[root@client1 nagios-plugins-2.2.]# cd ..

[root@client1 software]# tar zxvf nrpe-3.1..tar.gz

进入解压后的目录进行配置

[root@client1 software]# cd nrpe-3.1./

[root@client1 nrpe-3.1.]# ./configure

编译及安装

[root@client1 nrpe-3.1.]# make all

[root@client1 nrpe-3.1.]# make install-plugin

[root@client1 nrpe-3.1.]# make install-daemon

[root@client1 nrpe-3.1.]# make install-daemon-config

[root@client1 nrpe-3.1.]# mkdir /usr/local/nagios/etc/

[root@client1 nrpe-3.1.]# cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg

安装完成后，查看下libexec下面是否有插件

[root@client1 nrpe-3.1.]# ls /usr/local/nagios/libexec/

check_apt       check_dummy         check_imap         check_nagios    check_overcr   check_ssh     negate

check_breeze    check_file_age      check_ircd         check_nntp      check_ping     check_ssmtp   urlize

check_by_ssh    check_flexlm        check_jabber       check_nntps     check_pop      check_swap    utils.pm

check_clamd     check_fping         check_load         check_nrpe      check_procs    check_tcp     utils.sh

check_cluster   check_ftp           check_log          check_nt        check_real     check_time

check_dhcp      check_http          check_mailq        check_ntp       check_rpc      check_udp

check_dig       check_icmp          check_mrtg         check_ntp_peer  check_sensors  check_ups

check_disk      check_ide_smart     check_mrtgtraf     check_ntp_time  check_simap    check_uptime

check_disk_smb  check_ifoperstatus  check_mysql        check_nwstat    check_smtp     check_users

check_dns       check_ifstatus      check_mysql_query  check_oracle    check_spop     check_wave

启动nrpe，并测试服务端本地是否可以连通

[root@client1 nrpe-3.1.]# /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg

[root@client1 nrpe-3.1.]# echo "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg" >> /etc/rc.local

[root@client1 nrpe-3.1.]# chmod +x /etc/rc.d/rc.local           # centos 7下需要这一步， 不然/etc/rc.local中的内容开机可能不执行

[root@client1 nrpe-3.1.]# netstat -lnput|grep

tcp               0.0.0.0:            0.0.0.0:*               LISTEN      /nrpe

tcp6              :::                 :::*                    LISTEN      /nrpe

[root@client1 nrpe-3.1.]# /usr/local/nagios/libexec/check_nrpe -H localhost

NRPE v3.1.0-rc1

修改配置文件

[root@client1 nrpe-3.1.]# cd /usr/local/nagios/etc/

vi nrpe.cfg

允许服务端IP和本机访问，172.16.0.18是nagios服务端IP地址

allowed_hosts=127.0.0.1,::1    ===>    修改为    allowed_hosts=127.0.0.1,::1,172.16.0.18

注释下面几行内容

command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10

command[check_load]=/usr/local/nagios/libexec/check_load -r -w .15,.10,.05 -c .30,.25,.20

command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1

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 150 -c 200

在nrpe.cfg文件末尾增加下面几行内容

# my custom monitor items

command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10

command[check_load]=/usr/local/nagios/libexec/check_load -r -w .15,.10,.05 -c .30,.25,.20

command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /

command[check_mem]=/usr/local/nagios/libexec/check_mem.pl -w 90% -c 95%

command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%

创建一个监控内存的perl脚本

[root@client1 etc]# vi /usr/local/nagios/libexec/check_mem.pl

添加下面内容

#! /usr/bin/perl -w

#

# $Id: check_mem.pl  -- ::52Z rhomann $

#

# check_mem v1. plugin for nagios

#

# uses the output of `free` to find the percentage of memory used

#

# Copyright Notice: GPL

#

# History:

# v1. Rouven Homann - rouven.homann@cimt.de

# + added findbin patch from Duane Toler

# + added backward compatibility patch from Timour Ezeev

#

# v1. Ingo Lantschner - ingo AT boxbe DOT com

# + adapted for systems with no swap (avoiding divison through )

#

# v1. Cedric Temple - cedric DOT temple AT cedrictemple DOT info

# + add swap monitoring

#       + if warning and critical threshold are , exit with OK

#       + add a directive to exclude/include buffers

#

# v1. Rouven Homann - rouven.homann@cimt.de

# + perfomance tweak with free -mt (just one sub process started instead of )

# + more code cleanup

#

# v1. Garrett Honeycutt - gh@3gupload.com

# + Fixed PerfData output to adhere to standards and show crit/warn values

#

# v1. Rouven Homann - rouven.homann@cimt.de

#   + Memory installed, used and free displayed in verbose mode

# + Bit Code Cleanup

#

# v1. Rouven Homann - rouven.homann@cimt.de

# + Bug fixed where verbose output was required (nrpe2)

#       + Bug fixed where perfomance data was not displayed at verbose output

# + FindBin Module used for the nagios plugin path of the utils.pm

#

# v1. Rouven Homann - rouven.homann@cimt.de

#     + Status Support (-c, -w)

# + Syntax Help Informations (-h)

#       + Version Informations Output (-V)

# + Verbose Output (-v)

#       + Better Error Code Output (as described in plugin guideline)

#

# v1. Garrett Honeycutt - gh@3gupload.com

#   + Initial Release

#

use strict;

use FindBin;

FindBin::again();

use lib $FindBin::Bin;

use utils qw($TIMEOUT %ERRORS &print_revision &support);

use vars qw($PROGNAME $PROGVER);

use Getopt::Long;

use vars qw($opt_V $opt_h $verbose $opt_w $opt_c);

$PROGNAME = "check_mem";

$PROGVER = "1.8";

# add a directive to exclude buffers:

my $DONT_INCLUDE_BUFFERS = ;

sub print_help ();

sub print_usage ();

Getopt::Long::Configure('bundling');

GetOptions ("V"   => \$opt_V, "version"    => \$opt_V,

  "h"   => \$opt_h, "help"       => \$opt_h,

        "v" => \$verbose, "verbose"  => \$verbose,

  "w=s" => \$opt_w, "warning=s"  => \$opt_w,

  "c=s" => \$opt_c, "critical=s" => \$opt_c);

if ($opt_V) {

  print_revision($PROGNAME,'$Revision: '.$PROGVER.' $');

  exit $ERRORS{'UNKNOWN'};

}

if ($opt_h) {

  print_help();

  exit $ERRORS{'UNKNOWN'};

}

print_usage() unless (($opt_c) && ($opt_w));

my ($mem_critical, $swap_critical);

my ($mem_warning, $swap_warning);

($mem_critical, $swap_critical) = ($,$) if ($opt_c =~ /([-]+)[%]?(?:,([-]+)[%]?)?/);

($mem_warning, $swap_warning)   = ($,$) if ($opt_w =~ /([-]+)[%]?(?:,([-]+)[%]?)?/);

# Check if swap params were supplied

$swap_critical ||= ;

$swap_warning  ||= ;

# print threshold in output message

my $mem_threshold_output = " (";

my $swap_threshold_output = " (";

if ( $mem_warning >  && $mem_critical > ) {

  $mem_threshold_output .= "W> $mem_warning, C> $mem_critical";

}

elsif ( $mem_warning >  ) {

  $mem_threshold_output .= "W> $mem_warning";

}

elsif ( $mem_critical >  ) {

  $mem_threshold_output .= "C> $mem_critical";

}

if ( $swap_warning >  && $swap_critical > ) {

  $swap_threshold_output .= "W> $swap_warning, C> $swap_critical";

}

elsif ( $swap_warning >  ) {

  $swap_threshold_output .= "W> $swap_warning";

}

elsif ( $swap_critical >  )  {

  $swap_threshold_output .= "C> $swap_critical";

}

$mem_threshold_output .= ")";

$swap_threshold_output .= ")";

my $verbose = $verbose;

my ($mem_percent, $mem_total, $mem_used, $swap_percent, $swap_total, $swap_used) = &sys_stats();

my $free_mem = $mem_total - $mem_used;

my $free_swap = $swap_total - $swap_used;

# set output message

my $output = "Memory Usage".$mem_threshold_output.": ". $mem_percent.'% <br>';

$output .= "Swap Usage".$swap_threshold_output.": ". $swap_percent.'%';

# set verbose output message

my $verbose_output = "Memory Usage:".$mem_threshold_output.": ". $mem_percent.'% '."- Total: $mem_total MB, used: $mem_used MB, free: $free_mem MB<br>";

$verbose_output .= "Swap Usage:".$swap_threshold_output.": ". $swap_percent.'% '."- Total: $swap_total MB, used: $swap_used MB, free: $free_swap MB<br>";

# set perfdata message

my $perfdata_output = "MemUsed=$mem_percent\%;$mem_warning;$mem_critical";

$perfdata_output .= " SwapUsed=$swap_percent\%;$swap_warning;$swap_critical";

# if threshold are , exit with OK

if ( $mem_warning ==  ) { $mem_warning =  };

if ( $swap_warning ==  ) { $swap_warning =  };

if ( $mem_critical ==  ) { $mem_critical =  };

if ( $swap_critical ==  ) { $swap_critical =  };

if ($mem_percent>$mem_critical || $swap_percent>$swap_critical) {

    if ($verbose) { print "<b>CRITICAL: ".$verbose_output."</b>|".$perfdata_output."\n";}

    else { print "<b>CRITICAL: ".$output."</b>|".$perfdata_output."\n";}

    exit $ERRORS{'CRITICAL'};

} elsif ($mem_percent>$mem_warning || $swap_percent>$swap_warning) {

    if ($verbose) { print "<b>WARNING: ".$verbose_output."</b>|".$perfdata_output."\n";}

    else { print "<b>WARNING: ".$output."</b>|".$perfdata_output."\n";}

    exit $ERRORS{'WARNING'};

} else {

    if ($verbose) { print "OK: ".$verbose_output."|".$perfdata_output."\n";}

    else { print "OK: ".$output."|".$perfdata_output."\n";}

    exit $ERRORS{'OK'};

}

sub sys_stats {

    my @memory = split(" ", `free -mt`);

    my $mem_total = $memory[];

    my $mem_used;

    if ( $DONT_INCLUDE_BUFFERS) { $mem_used = $memory[]; }

    else { $mem_used = $memory[];}

    my $swap_total = $memory[];

    my $swap_used = $memory[];

    my $mem_percent = ($mem_used / $mem_total) * ;

    my $swap_percent;

    if ($swap_total == ) {

  $swap_percent = ;

    } else {

  $swap_percent = ($swap_used / $swap_total) * ;

    }

    return (sprintf("%.0f",$mem_percent),$mem_total,$mem_used, sprintf("%.0f",$swap_percent),$swap_total,$swap_used);

}

sub print_usage () {

    print "Usage: $PROGNAME -w <warn> -c <crit> [-v] [-h]\n";

    exit $ERRORS{'UNKNOWN'} unless ($opt_h);

}

sub print_help () {

    print_revision($PROGNAME,'$Revision: '.$PROGVER.' $');

    print "Copyright (c) 2005 Garrett Honeycutt/Rouven Homann/Cedric Temple\n";

    print "\n";

    print_usage();

    print "\n";

    print "-w <MemoryWarn>,<SwapWarn> = Memory and Swap usage to activate a warning message (eg: -w 90,25 ) .\n";

    print "-c <MemoryCrit>,<SwapCrit> = Memory and Swap usage to activate a critical message (eg: -c 95,50 ).\n";

    print "-v = Verbose Output.\n";

    print "-h = This screen.\n\n";

    support();

}

给脚本增加执行权限

[root@client1 etc]# chmod  /usr/local/nagios/libexec/check_mem.pl

重启nrpe服务

# 方法一

[root@client1 etc]# killall nrpe

[root@client1 etc]# /usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg

# 方法二

[root@client1 etc]# kill -HUP `ps -ef|grep nrpe|awk 'NR==1{print $2}'`

在本机执行两个命令看下效果

[root@client1 etc]# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_mem

<b>CRITICAL: Memory Usage (W> , C> ): % <br>Swap Usage (W> , C> ): %</b>|MemUsed=%;; SwapUsed=%;;

[root@client1 etc]# /usr/local/nagios/libexec/check_nrpe -H localhost -c check_disk

DISK OK - free space: /  MB (24.15% inode=%);| /=13192MB;;;;

服务端配置
nrpe连接客户端机器测试是否可以连通，然后执行一个监控命令（如果不通的话可能是因为selinux和防火墙没关闭而造成的）

[root@nagios nrpe-3.1.]# /usr/local/nagios/libexec/check_nrpe -H 172.16.0.20

NRPE v3.1.0-rc1

[root@nagios nrpe-3.1.]# /usr/local/nagios/libexec/check_nrpe -H 172.16.0.20 -c check_disk

DISK OK - free space: /  MB (24.15% inode=%);| /=13192MB;;;;

因为nagios默认把全部的权限给nagiosadmin，所以可以通过修改cgi.cfg文件赋予nagios权限，切换到/usr/local/nagios/etc目录下

[root@nagios nrpe-3.1.]# cd /usr/local/nagios/etc

[root@nagios etc]# ll

总用量

-rw-rw-r--  nagios nagios  4月   : cgi.cfg

-rw-r--r--  root   root       4月   : htpasswd.users

-rw-rw-r--  nagios nagios  4月   : nagios.cfg

-rw-r--r--  root   root    4月   : nrpe.cfg

drwxrwxr-x  nagios nagios    4月   : objects

-rw-rw----  nagios nagios   4月   : resource.cfg

[root@nagios etc]# grep nagiosadmin cgi.cfg

authorized_for_system_information=nagiosadmin

authorized_for_configuration_information=nagiosadmin

authorized_for_system_commands=nagiosadmin

authorized_for_all_services=nagiosadmin

authorized_for_all_hosts=nagiosadmin

authorized_for_all_service_commands=nagiosadmin

authorized_for_all_host_commands=nagiosadmin

[root@nagios etc]# sed -i 's/nagiosadmin/nagiosadmin,nagios/g' cgi.cfg

[root@nagios etc]# grep nagiosadmin cgi.cfg

authorized_for_system_information=nagiosadmin,nagios

authorized_for_configuration_information=nagiosadmin,nagios

authorized_for_system_commands=nagiosadmin,nagios

authorized_for_all_services=nagiosadmin,nagios

authorized_for_all_hosts=nagiosadmin,nagios

authorized_for_all_service_commands=nagiosadmin,nagios

authorized_for_all_host_commands=nagiosadmin,nagios

修改nagios.cfg（自定义一些配置）

[root@nagios etc]# vi nagios.cfg +

#注释掉下面这行

#cfg_file=/usr/local/nagios/etc/objects/localhost.cfg

#添加下面两行内容

cfg_file=/usr/local/nagios/etc/objects/services.cfg

cfg_file=/usr/local/nagios/etc/objects/hosts.cfg

创建hosts.cfg和services.cfg这两个文件

[root@nagios etc]# cd objects/

[root@nagios objects]# pwd

/usr/local/nagios/etc/objects

[root@nagios objects]# touch services.cfg

[root@nagios objects]# head - localhost.cfg  > hosts.cfg

[root@nagios objects]# chown -R nagios.nagios *

修改nagios检查语法脚本

[root@nagios objects]# vim /etc/init.d/nagios +

#check_config

$NagiosBin -v $NagiosCfgFile;

vi commands.cfg 进入后按shift+g切到结尾加入下面内容。

# 'check_nrpe' command definition

define command{

        command_name    check_nrpe

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

        }

# 'check_ping' command definition

define command{

        command_name    check-ping

        command_line    $USER1$/check_ping -H $HOSTADDRESS$ -w 100.0,% -c 200.0,% -p  -t

        }

# 'check_http' command definition

define command{

        command_name    check-weburl

        command_line    $USER1$/check_http -H $HOSTADDRESS$ $ARG1$ -w  -c

        }

# 'check_tcp' command definition

define command{

        command_name    check-tcp

        command_line    $USER1$/check_tcp -H $HOSTADDRESS$ -p $ARG1$ -w 0.02 -c 0.1

        }

查看有哪些cfg文件

[root@nagios objects]# pwd

/usr/local/nagios/etc/objects

[root@nagios objects]# ll

总用量

-rw-rw-r--  nagios nagios   4月   : commands.cfg

-rw-rw-r--  nagios nagios   4月   : contacts.cfg

-rw-r--r--  nagios nagios   4月   : hosts.cfg

-rw-rw-r--  nagios nagios   4月   : localhost.cfg

-rw-rw-r--  nagios nagios   4月   : printer.cfg

-rw-r--r--  nagios nagios      4月   : services.cfg

-rw-rw-r--  nagios nagios   4月   : switch.cfg

-rw-rw-r--  nagios nagios  4月   : templates.cfg

-rw-rw-r--  nagios nagios   4月   : timeperiods.cfg

-rw-rw-r--  nagios nagios   4月   : windows.cfg

常用对象介绍

联系人
contact
出了问题像谁报告?一般当然是系统管理员了

监控时间段
timeperiod
7X24小时不间断还是周一至周五,或是自定义的其他时间段

被监控主机
host
所需要监控的服务器,当然可以是监控机自己

监控命令
command
nagios发出的哪个指令来执行某个监控,这也是自己定义的

被监控的服务
service
例如主机是否存活,80端口是否开,磁盘使用情况或者自定义的服务等

contacts.cfg文件介绍

service_notification_period 24x7
服务出了状况通知的时间段,这个时间段就是上面在timeperiods.cfg中定义的.

host_notification_period 24x7
主机出了状况通知的时间段, 这个时间段就是上面在timeperiods.cfg中定义的

service_notification_options w,u,c,r
当服务出现w—报警(warning),u—未知(unkown),c—严重(critical),或者r—从异常情况恢复正常,在这四种情况下通知联系人.

host_notification_options d,u,r
当主机出现d—当机(down),u—返回不可达(unreachable),r—从异常情况恢复正常,在这3种情况下通知联系人

service_notification_commands notify- service -by-email
服务出问题通知采用的命令notify-by-email,这个命令是在commands.cfg中定义的,作用是给联系人发邮件.至于commands.cfg之后将专门介绍

host_notification_commands host-notify-by-email notify- host--by-email
同上,主机出问题时采用的也是发邮件的方式通知联系人

email 123456@qq.com
很明显,联系的人email地址

pager 1338757xxxx

联系人的手机,如果支持短信的通知的话,这个就很有用了.

alias是联系人别名,address是地址 .

contactgroups.cfg文件介绍

define contactgroup{
contactgroup_name 组名 //联系人组的名称
alias 别名 //别名
members 用户名 //组的成员,来自于上面定义的contacts.cfg,如果有多个联系人则以逗号相隔
}

主机模板介绍（hosts.cfg）

> ```# host

define host{

       host_name                       主机名  //被监控主机的名称,最好别带空格nagios-server

       alias                           别名

       address                         IP  //被监控主机的IP地址

       check_command                   check-host-alive  //监控的命令check-host-alive,这个命令来自commands.cfg,用来监控主机是否存活

       max_check_attempts                //检查失败后重试的次数

       check_period                    24x7  //检查的时间段24x7,同样来自于我们之前在    timeperiods.cfg中定义的

       contact_groups                  组名  //联系人组,上面在contactgroups.cfg中定义的组名

       notification_interval             //提醒的间隔,每隔10秒提醒一次

       notification_period             24x7  //提醒的周期, 24x7,同样来自于我们之前在timeperiods.cfg中定义的

       notification_options            d,u,r  //指定什么情况下提醒,具体含义见之前contacts.cfg部分的介绍

       }

主机组模板介绍（hosts.cfg）

define hostgroup{
hostgroup_name 主机组名
alias 别名
members 主机名 //组的成员主机,多个主机以逗号相隔,必须是上面hosts.cfg中定义的
}

`服务模板介绍（services.cfg）`

> ```# service definition

define service{

       host_name               主机名  //被监控的主机,hosts.cfg中定义的

       service_description     check-host-alive  //这个监控项目的描述(也可以说是这个项目的名称),可以空格,我们这里定义的是监控这个主机是不是存活

       check_command           check-host-alive  //所用的命令,是commands.cfg中定义的

       max_check_attempts

       normal_check_interval

       retry_check_interval

       check_period            24x7  //监控的时间段,是timeperiods.cfg中定义的

       notification_interval

       notification_period     24x7  //通知的时间段, ,是timeperiods.cfg中定义的

       notification_options    w,u,c,r  //在监控的结果是wucr时通知联系人,具体含义看前文.

       contact_groups          组名  //联系人组,是contactgroups.cfg中定义的

       }

主机模板配置

[root@nagios objects]# vi hosts.cfg +

删除下面11行内容

添加下面内容



# Define some hosts

###########172.16.0.18##################

define host {

        use                      linux-server

        host_name                nagios

        alias                    nagios

        address                  172.16.0.18

        check_command            check-host-alive

        max_check_attempts

        normal_check_interval

        retry_check_interval

        check_period              24x7

        notification_interval

        notification_period       24x7

        notification_options      d,u,r

        contact_groups            admins

        process_perf_data

}



###########172.16.0.18##################

define host {

        use                      linux-server

        host_name                client1

        alias                    client1

        address                  172.16.0.20

        check_command            check-host-alive

        max_check_attempts

        normal_check_interval

        retry_check_interval

        check_period              24x7

        notification_interval

        notification_period       24x7

        notification_options      d,u,r

        contact_groups            admins

        process_perf_data

}



把监控的主机添加到主机组里面

[root@nagios objects]# vi hosts.cfg +

define hostgroup{

        hostgroup_name  linux-servers ; The name of the hostgroup

        alias           Linux Servers ; Long name of the group

        members         nagios,client1     ; Comma separated list of hosts that belong to this group

        }

服务模板配置

[root@nagios objects]# pwd

/usr/local/nagios/etc/objects

[root@nagios objects]# vi services.cfg

添加下面内容

###########172.16.0.18##################

define service{

        use                     generic-service

        host_name               nagios

        service_description     Load

        check_command           check_nrpe!check_load       #这里的check_nrpe不是服务端/usr/local/nagios/libexec/check_nrpe,而是command.cfg里定义的命令

        }

define service{

        use                     generic-service

        host_name               nagios

        service_description     Disk

        check_command           check_nrpe!check_disk

        }

define service{

        use                     generic-service

        host_name               nagios

        service_description     memory

        check_command           check_nrpe!check_mem

        }

define service{

        use                     generic-service

        host_name               nagios

        service_description     Ping

        check_command           check-ping!172.16.0.18

}

define service{

        use                     generic-service

        host_name               nagios

        service_description     port_3306

        check_command           check-tcp!

}

###########172.16.0.20##################

define service{

        use                     generic-service

        host_name               client1

        service_description     Load

        check_command           check_nrpe!check_load

        }

define service{

        use                     generic-service

        host_name               client1

        service_description     Disk

        check_command           check_nrpe!check_disk

        }

define service{

        use                     generic-service

        host_name               client1

        service_description     memory

        check_command           check_nrpe!check_mem

        }

define service{

    use             generic-service

        host_name               client1

        service_description     Ping

        check_command           check-ping!172.16.0.20

}

define service{

        use                     generic-service

        host_name               client1

        service_description     port_3306

        check_command           check-tcp!3306

重启nagios服务

[root@nagios objects]# /etc/init.d/nagios restart

打开浏览器访问

点击hosts

点击services

ok，我们的配置告一段落了。

出图部分

下载pnp4nagios源码包

[root@nagios objects]# cd /software/

[root@nagios software]# wget https://jaist.dl.sourceforge.net/project/pnp4nagios/PNP-0.6/pnp4nagios-0.6.25.tar.gz

安装依赖包

[root@nagios software]# yum install cairo pango perl-rrdtool rrdtool librrds-perl zlib zlib-devel freetype freetype-devel gd gd-devel -y

解压pnp4nagios源码包

[root@nagios software]# tar zxf pnp4nagios-0.6..tar.gz

进入解压后的目录配置png

[root@nagios pnp4nagios-0.6.]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios

编译及安装

[root@nagios pnp4nagios-0.6.]# make all

[root@nagios pnp4nagios-0.6.]# make install

[root@nagios pnp4nagios-0.6.]# make install-webconf

[root@nagios pnp4nagios-0.6.]# make install-config

[root@nagios pnp4nagios-0.6.]# make install-init

[root@nagios pnp4nagios-0.6.]# cd sample-config/

[root@nagios sample-config]# make install-webconf

配置pnp4nagios

[root@nagios sample-config]# cd /usr/local/pnp4nagios/etc/

[root@nagios etc]# mv misccommands.cfg-sample misccommands.cfg

[root@nagios etc]#  mv rra.cfg-sample rra.cfg

[root@nagios etc]# mv nagios.cfg-sample nagios.cfg

[root@nagios etc]# cd pages/

[root@nagios pages]# mv web_traffic.cfg-sample web_traffic.cfg

[root@nagios pages]#  cd ../check_commands/

[root@nagios check_commands]# mv check_all_local_disks.cfg-sample check_all_local_disks.cfg

[root@nagios check_commands]#  mv check_nrpe.cfg-sample check_nrpe.cfg

[root@nagios check_commands]# mv check_nwstat.cfg-sample check_nwstat.cfg

[root@nagios check_commands]# systemctl enable npcd

[root@nagios check_commands]# systemctl start npcd

配置Nagios数据输出接口(以BULK模式运行)详情参考官网https://docs.pnp4nagios.org/pnp-0.6/config#bulk_mode：

[root@nagios check_commands]# vi /usr/local/nagios/etc/nagios.cfg

process_performance_data= #默认为0，修改为1

并在该文件中添加下面的内容

#

# service performance data

#

service_perfdata_file=/usr/local/pnp4nagios/var/service-perfdata

service_perfdata_file_template=DATATYPE::SERVICEPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tSERVICEDESC::$SERVICEDESC$\tSERVICEPERFDATA::$SERVICEPERFDATA$\tSERVICECHECKCOMMAND::$SERVICECHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$\tSERVICESTATE::$SERVICESTATE$\tSERVICESTATETYPE::$SERVICESTATETYPE$

service_perfdata_file_mode=a

service_perfdata_file_processing_interval=

service_perfdata_file_processing_command=process-service-perfdata-file

#

# host performance data starting with Nagios 

#

host_perfdata_file=/usr/local/pnp4nagios/var/host-perfdata

host_perfdata_file_template=DATATYPE::HOSTPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tHOSTPERFDATA::$HOSTPERFDATA$\tHOSTCHECKCOMMAND::$HOSTCHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$

host_perfdata_file_mode=a

host_perfdata_file_processing_interval=

host_perfdata_file_processing_command=process-host-perfdata-file

配置command.cfg

[root@nagios check_commands]#  vi /usr/local/nagios/etc/objects/commands.cfg

在该文件中添加下面的内容

define command{

      command_name    process-service-perfdata-file

      command_line    /usr/local/pnp4nagios/libexec/process_perfdata.pl --bulk=/usr/local/pnp4nagios/var/service-perfdata

}

define command{

      command_name    process-host-perfdata-file

      command_line    /usr/local/pnp4nagios/libexec/process_perfdata.pl --bulk=/usr/local/pnp4nagios/var/host-perfdata

}

在模板配置文件中添加图表图标模板：

[root@nagios check_commands]# vi /usr/local/nagios/etc/objects/templates.cfg

在该文件中添加下面的内容

define host {

  name      host-pnp

  action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_

  register

}

define service {

  name      service-pnp

  action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$

  register  

}

在监控主机和服务中调用图表模板（在主机和服务后面添加新的模板）：

[root@nagios check_commands]# vi /usr/local/nagios/etc/objects/hosts.cfg

主机内容修改如下

###########172.16.0.18##################

define host {

        use                      linux-server,host-pnp

        host_name                nagios

        alias                    nagios

        address                  172.16.0.18

        check_command            check-host-alive

        max_check_attempts

        normal_check_interval

        retry_check_interval

        check_period              24x7

        notification_interval

        notification_period       24x7

        notification_options      d,u,r

        contact_groups            admins

        process_perf_data

}



###########172.16.0.18##################

define host {

        use                      linux-server,host-pnp

        host_name                client1

        alias                    client1

        address                  172.16.0.20

        check_command            check-host-alive

        max_check_attempts

        normal_check_interval

        retry_check_interval

        check_period              24x7

        notification_interval

        notification_period       24x7

        notification_options      d,u,r

        contact_groups            admins

        process_perf_data

}

[root@nagios check_commands]# vi /usr/local/nagios/etc/objects/services.cfg

服务内容修改如下

###########172.16.0.18##################

define service{

        use                     generic-service,service-pnp

        host_name               nagios

        service_description     Load

        check_command           check_nrpe!check_load       #这里的check_nrpe不是服务端/usr/local/nagios/libexec/check_nrpe,而是command.cfg里定义的命令

        }

define service{

        use                     generic-service,service-pnp

        host_name               nagios

        service_description     Disk

        check_command           check_nrpe!check_disk

        }

define service{

        use                     generic-service,service-pnp

        host_name               nagios

        service_description     memory

        check_command           check_nrpe!check_mem

        }

define service{

        use                     generic-service,service-pnp

        host_name               nagios

        service_description     Ping

        check_command           check-ping!172.16.0.18

}

define service{

        use                     generic-service,service-pnp

        host_name               nagios

        service_description     port_3306

        check_command           check-tcp!

}

###########172.16.0.20##################

define service{

        use                     generic-service,service-pnp

        host_name               client1

        service_description     Load

        check_command           check_nrpe!check_load

        }

define service{

        use                     generic-service,service-pnp

        host_name               client1

        service_description     Disk

        check_command           check_nrpe!check_disk

        }

define service{

        use                     generic-service,service-pnp

        host_name               client1

        service_description     memory

        check_command           check_nrpe!check_mem

        }

define service{

    use                     generic-service,service-pnp

        host_name               client1

        service_description     Ping

        check_command           check-ping!172.16.0.20

}

define service{

        use                     generic-service,service-pnp

        host_name               client1

        service_description     port_3306

        check_command           check-tcp!

}

图表展示

重启nagios和apache

[root@nagios check_commands]# /etc/init.d/nagios checkconfig

[root@nagios check_commands]# /etc/init.d/nagios restart

[root@nagios check_commands]# systemctl restart httpd

访问nagios界面即可看到图表小图标：

点击图标会显示pnp4nagios测试页面：

全是绿色代表配置正常，如果不是全绿，要逐个解决错误。然后移除或修改install.php文件：

[root@nagios ~]# rm -rf /usr/local/pnp4nagios/share/install.php

再次点击图标就会显示当前监控服务由pnp4nagios生成的图表了

邮件报警配置

查看sendmail邮件系统是否安装

[root@nagios ~]# rpm -qa|grep sendmail

如果没有安装，可以yum安装一下

[root@nagios ~]# yum -y install sendmail

启动sendmail

[root@nagios ~]# systemctl enable sendmail

[root@nagios ~]# systemctl start sendmail

测试发送邮件：

[root@nagios ~]# echo "test" | mail zhengxinlei@test.com.cn

发送外部邮件的时候，这种本地形式的发件人和发件地址容易被误认为垃圾邮件而拒收。
我们这里定义邮件发送smtp信息。
首先安装mailx12.5

wget http://fossies.org/linux/misc/old/mailx-12.5.tar.gz

tar zxf mailx-12.5.tar.gz

cd mailx-12.5

make

make install UCBINSTALL=/usr/bin/install

mv /bin/mail /bin/mail_old

ln -s /usr/local/bin/mailx /bin/mail

mail -V

接下来配置外部smtp发件信息

vi /etc/nail.rc

添加如下内容：

set bsdcompat

set from=yunwei@yasn.com.cn

set smtp=smtp.yasn.com.cn

set smtp-auth-user=yunwei@yasn.com.cn

set smtp-auth-password=

set smtp-auth=login

测试邮件发送

echo 'mail content'|mail -s test zhengxinlei@test.com.cn

发送邮件测试，可以看到发件人是我们设定的外部邮件发件人

编辑contacts.cfg，定义邮件联系人和组

[root@nagios ~]# cd /usr/local/nagios/etc/objects/

[root@nagios objects]# ls

commands.cfg  localhost.cfg~  services.cfg  templates.cfg    hosts.cfg    printer.cfg

switch.cfg   windows.cfg contacts.cfg   localhost.cfg  timeperiods.cfg

[root@nagios objects]# vi contacts.cfg              // 修改内容如下

define contact{

        contact_name                    nagiosadmin             ; Short name of user

        use                             generic-contact         ; Inherit default values from generic-contact template (defined above)

        alias                           Nagios Admin            ; Full name of user

        #email                           nagios@localhost       ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******

        email                           @vip.qq.com,xinlei@.com

        }

define contactgroup{

        contactgroup_name       admins

        alias                   Nagios Administrators

        members                 nagiosadmin

        }

编辑commands.cfg文件，定义邮件发送命令

[root@nagios objects]# vi commands.cfg                // 查看下面内容是否存在，不存在则添加

# 'notify-host-by-email' command definition

define command{

　　command_name    notify-host-by-email

　　command_line    /usr/bin/printf "%b" "***** Nagios ***** Notification Type: $NOTIFICATIONTYPE$ Host: $HOSTNAME$ State: $HOSTSTATE$ Address: $HOSTADDRESS$ Info: $HOSTOUTPUT$ Date/Time: $LONGDATETIME$ " | /bin/mail -s "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" $CONTACTEMAIL$

　　}

# 'notify-service-by-email' command definition

define command{

　　command_name    notify-service-by-email

　　command_line    /usr/bin/printf "%b" "***** Nagios ***** Notification Type: $NOTIFICATIONTYPE$ Service: $SERVICEDESC$ Host: $HOSTALIAS$ Address: $HOSTADDRESS$ State: $SERVICESTATE$ Date/Time: $LONGDATETIME$ Additional Info: $SERVICEOUTPUT$ " | /bin/mail -s "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" $CONTACTEMAIL$

　　}

修改一下监控的阀值，模拟报警。

重启nagios服务和sendmail服务

[root@nagios ~]# systemctl restart nagios

[root@nagios ~]# systemctl stop sendmail

[root@nagios ~]# ps -ef|grep sendmail

[root@nagios ~]# systemctl start sendmail

[root@nagios ~]# ps -ef|grep sendmail

查看报警的邮件，来几张图吧：

这是报警恢复后的邮件：

ok，搞定了。

常见邮件发送报错：

报错1

解决方法：
修改hosts为域名形式

[root@nagios objects]# cat /etc/hosts

172.16.0.18 nagios nagios.com

报错2（发送外部邮件的时候，这种本地形式的发件人和发件地址容易被误认为垃圾邮件而拒收。）

解决方法，见上面配置mail发件人smtp信息。

●监视物理组件的高级 Linux 命令（仅供参考）

内存：top free、vmstat、mpstat、iostat、sar
CPU：top vmstat、mpstat、iostat、sar
I/O：vmstat、mpstat、iostat、sar
进程：ipcs、ipcrm
负载：uptime

一键安装nagios命令参考

#############nagios-server-install########################

mkdir /software/

# mv nagios-4.3..tar.gz nagios-plugins-2.2..tar.gz nrpe-3.1..tar.gz pnp4nagios-0.6..tar.gz /software/

cd /software/

wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.3.1.tar.gz

wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz

wget https://sourceforge.net/projects/nagios/files/nrpe-3.x/nrpe-3.1.0.tar.gz

wget https://jaist.dl.sourceforge.net/project/pnp4nagios/PNP-0.6/pnp4nagios-0.6.25.tar.gz

yum -y install httpd httpd-devel gcc glibc glibc-common gd gd-devel perl-devel perl-CPAN fcgi perl-FCGI perl-FCGI-ProcManager

tar zxvf nagios-4.3..tar.gz

cd nagios-4.3./

useradd nagios -s /sbin/nologin

id www

groupadd nagcmd

usermod -a -G nagcmd nagios

usermod -a -G nagcmd www

id -n -G nagios

id -n -G www

./configure --with-command-group=nagcmd

make all

make install-init

make install-commandmode

make install-config

make install

sleep

cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/

chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers

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

make install-webconf

echo 'nagios:$apr1$UigX6LG0$29RugFJZTSxRjnX4NIH3E0' > /usr/local/nagios/etc/htpasswd.users

sed -i 's/Listen 80/Listen 8080/g' /etc/httpd/conf/httpd.conf

sed -i 's/User apache/User www/g' /etc/httpd/conf/httpd.conf

sed -i 's/Group apache/Group www/g' /etc/httpd/conf/httpd.conf

sed -i 's/DirectoryIndex index.html/DirectoryIndex index.php index.html/g' /etc/httpd/conf/httpd.conf

grep 'Listen' /etc/httpd/conf/httpd.conf

grep 'User' /etc/httpd/conf/httpd.conf

grep 'Group' /etc/httpd/conf/httpd.conf

grep 'DirectoryIndex' /etc/httpd/conf/httpd.conf

cd /software/php-7.1./

./configure --prefix=/usr/local/php --enable-fpm --with-fpm-user=www --with-fpm-group=www --with-mysqli --with-zlib --with-curl --with-gd --with-jpeg-dir --with-png-dir --with-freetype-dir --with-openssl --enable-mbstring --enable-xml --enable-session --enable-ftp --enable-pdo -enable-tokenizer --enable-zip --with-apxs2

make && make install

sleep 

cd /etc/httpd/

ll /etc/httpd/modules/libphp7.so

systemctl start httpd

systemctl enable httpd

chkconfig nagios on

/etc/init.d/nagios start

cd /software/

tar zxvf nagios-plugins-2.2..tar.gz

cd nagios-plugins-2.2./

./configure --with-nagios-user=nagios --with-nagios-group=nagcmd --enable-perl-modules

make && make install

cd /software/

tar zxvf nrpe-3.1..tar.gz

cd nrpe-3.1./

./configure

make all

make install-plugin

make install-daemon

make install-daemon-config

cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg

ls /usr/local/nagios/libexec/

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

echo "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg" >> /etc/rc.local

chmod +x /etc/rc.d/rc.local

netstat -lnput|grep

/usr/local/nagios/libexec/check_nrpe -H localhost

#######################nagios-client-install###########################

mkdir /software/

# mv nagios-plugins-2.2..tar.gz nrpe-3.1..tar.gz /software/

cd /software/

wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz

wget https://sourceforge.net/projects/nagios/files/nrpe-3.x/nrpe-3.1.0.tar.gz

yum install perl-devel perl-CPAN -y

useradd nagios -M -s /sbin/nologin

tar zxvf nagios-plugins-2.2..tar.gz

cd nagios-plugins-2.2./

./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-perl-modules

make && make install

sleep

cd ..

tar zxvf nrpe-3.1..tar.gz

cd nrpe-3.1./

./configure

make all

make install-plugin

make install-daemon

make install-daemon-config

mkdir /usr/local/nagios/etc/

cp sample-config/nrpe.cfg /usr/local/nagios/etc/nrpe.cfg

ls /usr/local/nagios/libexec/

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

echo "/usr/local/nagios/bin/nrpe -d -c /usr/local/nagios/etc/nrpe.cfg" >> /etc/rc.local

chmod +x /etc/rc.d/rc.local

netstat -lnput|grep

sed -i 's/allowed_hosts=127.0.0.1,::1/allowed_hosts=127.0.0.1,::1,172.16.0.1/g' /usr/local/nagios/etc/nrpe.cfg

sed -i 's/^command\[check/\#command\[check/g' /usr/local/nagios/etc/nrpe.cfg

cat >> /usr/local/nagios/etc/nrpe.cfg << EOF

# my custom monitor items

command[check_users]=/usr/local/nagios/libexec/check_users -w  -c

command[check_load]=/usr/local/nagios/libexec/check_load -r -w .,.,. -c .,.,.

command[check_disk]=/usr/local/nagios/libexec/check_disk -w % -c % -p /

command[check_mem]=/usr/local/nagios/libexec/check_mem.pl -w % -c %

command[check_swap]=/usr/local/nagios/libexec/check_swap -w % -c %

EOF

/usr/local/nagios/libexec/check_nrpe -H localhost -c check_disk

总结：

多多查看nagios日志和mail日志，进行排错。

作者：君惜丶
链接：https://www.jianshu.com/p/3476d98a4703
來源：简书
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

巴特西

Centos 7下Nagios的安装及配置

简介

软件版本

实现环境

下载nagios软件及插件包

安装nagios-server服务端

nagios客户端的安装

常用对象介绍

contacts.cfg文件介绍

contactgroups.cfg文件介绍

`服务模板介绍（services.cfg）`

主机模板配置

重启nagios服务

点击services

配置command.cfg

邮件报警配置

编辑contacts.cfg，定义邮件联系人和组

●监视物理组件的高级 Linux 命令（仅供参考）

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