1.基礎支援套件：gcc glibc glibc-common gd gd-devel xinetd openssl-devel httpd php   注：php和httpd均用原始碼包安裝，安裝配置方法此處不在詳述

# yum install -y gcc glibc glibc-common gd gd-devel xinetd openssl-devel

2.建立Nagios賬戶和組

#useradd -m nagios
#groupadd nagcmd
#usermod -a -G nagcmd nagios
#usermod -a -G nagcmd apache

3.編譯安裝

#tar xvf nagios-3.5.1.tar.gz
#cd nagios-3.5.1
#./configure prefix=/usr/local/nagios --with-command-group=nagcmd --with-nagios-user=nagios --with-nagios-group=nagios
#make all
#make install
#make install-init        （生成init啟動指令碼）
#make install-config      （生成一些模板配置檔案）
#make install-commandmode （設定相應的許可權）
#make install-webconf     （生成Apache配置檔案nagios.conf）

4.為Nagios設定Web驗證的密碼

#/usr/local/apache/bin/htpasswd -c /usr/local/nagios/etc/htpasswd.user nagiosadmin

5.設定Nagios的開機啟動

chkconfig --add nagios
chkconfig nagios on

6.安裝Nagios的外掛nagios-plugin

#tar zxvf nagios-plugins-1.4.16.tar.gz
#cd nagios-plugins-1.4.16
#./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios
 --with-apt-get-command --with-ping6-command --with-ping-command --with-mysql
 --with-gnutls --enable-extra-opts
#make 
#make install

7.此時完成初步安裝，可以監控檢視本機的一些服務，檢測配置檔案並啟動nagios

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

Nagios Core 3.5.1
Copyright (c) 2009-2011 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 08-30-2013
License: GPL

Website: http://www.nagios.org
Reading configuration data...
   Read main config file okay...
Processing object config file '/usr/local/nagios/etc/objects/commands.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/contacts.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/timeperiods.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/templates.cfg'...
Processing object config directory '/usr/local/nagios/etc/servers'...
Processing object config file '/usr/local/nagios/etc/servers/localhost.cfg'...
   Read object config files okay...

Running pre-flight check on configuration data...

Checking services...
 Checked 6 services.
Checking hosts...
 Checked 1 hosts.
Checking host groups...
 Checked 0 host groups.
Checking service groups...
 Checked 0 service groups.
Checking contacts...
 Checked 1 contacts.
Checking contact groups...
 Checked 1 contact groups.
Checking service escalations...
 Checked 0 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 25 commands.
Checking time periods...
 Checked 5 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

Things look okay - No serious problems were detected during the pre-flight check

出現此處，表明，配置檔案沒有錯誤，可以啟動nagios和apache

#service nagios start
#/usr/local/apache/sbin/apchectl

此時提示頁面無法訪問，原因在於由於Apache是原始碼包安裝，預設路徑和rpm包不一樣，需要在Apache的httpd.conf配置檔案中新增指定訪問路徑

8. 配置apache並載入nagios登入頁面  
找到apache 的配置檔案/usr/local/apache/conf/httpd.conf

找到：

User daemon 
Group daemon 修改為

User nagios 
Group nagios

為了安全起見，一般情況下要讓nagios 的web 監控頁面必須經過授權才能訪問，這需要增加驗證配置，即在httpd.conf 檔案最後新增如下資訊：

下面資訊在編譯nagios(make install-webconf )時就已經生成，配置資訊在：/etc/httpd/confd.d/nagios.conf 檔案中

#######################################################################
#setting for nagios
ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin"

     AuthType Basic
     Options ExecCGI
     AllowOverride None
     Order allow,deny 
     Allow from all 
     AuthName "Nagios Access"
     AuthUserFile /usr/local/nagios/etc/htpasswd.user
     Require valid-user

Alias /nagios "/usr/local/nagios/share"

     AuthType Basic
     Options None
     AllowOverride None
     Order allow,deny 
     Allow from all 
     AuthName "nagios Access"
     AuthUserFile /usr/local/nagios/etc/htpasswd.user
     Require valid-user

###########################################################################

9.重啟nagios、apache並訪問nagios

#service nagios restart
#/usr/local/apache/bin/apachectl restart
http://192.168.6.6/nagions

提示輸入使用者名稱密碼，訪問成功

但是登陸進去後，nagios頁面右側全部亂碼
解決方法：

主要是apache沒有開啟cgi指令碼的緣故

進入apache的主配置檔案httpd.conf
#vim /usr/local/apache/conf/httpd.conf
 
#LoadModule cgid_module modules/mod_cgid.so
#LoadModule actions_module modules/mod_actions.so

將上面2行的#去掉，重啟apache就OK

再次訪問 ，亂碼消失OK！

(二）配置Nagios

1.nagios配置目錄資訊

# cd /usr/local/nagios/etc/
# ls
cgi.cfg  htpasswd.user  nagios.cfg  objects  resource.cfg
[[email protected] etc]# ll
total 68
-rw-rw-r-- 1 nagios nagios 11669 Nov 29 14:18 cgi.cfg （CGI配置檔案）
-rw-r--r-- 1 root   root      50 Nov 29 14:20 htpasswd.user （Apache的驗證密碼檔案）
-rw-rw-r-- 1 nagios nagios 44710 Nov 29 14:18 nagios.cfg （主配置檔案）
drwxrwxr-x 2 nagios nagios  4096 Nov 29 14:18 objects （物件定義檔案目錄）
-rw-rw---- 1 nagios nagios  1340 Nov 29 14:18 resource.cfg （資源配置檔案）

2.修改nagios.cfg主配置檔案

#vim nagios.cfg

註釋掉：cfg_file=/usr/local/nagios/etc/objects/localhost.cfg  ———— #cfg_file=/usr/local/nagios/etc/objects/localhost.cfg
將 #cfg_dir=/usr/local/nagios/etc/servers  的 #（註釋）去掉 -----  cfg_dir=/usr/local/nagios/etc/servers

在/usr/local/nagios/etc/目錄中新建 servers子目錄，在裡面可以直接新增主機配置檔案
#mkdir servers

3.配置object目錄中的配置檔案

#cd objects/
#ll
total 48
-rw-rw-r-- 1 nagios nagios  7716 Nov 29 14:18 commands.cfg （命令定義檔案）
-rw-rw-r-- 1 nagios nagios  2166 Nov 29 14:18 contacts.cfg （聯絡人資訊定義檔案）
-rw-rw-r-- 1 nagios nagios  5403 Nov 29 14:18 localhost.cfg
-rw-rw-r-- 1 nagios nagios  3124 Nov 29 14:18 printer.cfg
-rw-rw-r-- 1 nagios nagios  3293 Nov 29 14:18 switch.cfg
-rw-rw-r-- 1 nagios nagios 10812 Nov 29 14:18 templates.cfg
-rw-rw-r-- 1 nagios nagios  3208 Nov 29 14:18 timeperiods.cfg （時間週期定義檔案）
-rw-rw-r-- 1 nagios nagios  4019 Nov 29 14:18 windows.cfg

配置聯絡人資訊(郵件接收者郵箱地址）

儲存，退出。

（三）nrpe安裝配置

1.安裝nrpe

#tar zxvf nrpe-2.12.tar.gz
#cd nrpe-1.12
# ./configure && make all
#make install-plugin
#make install-daemon
#make install-daemon-config
#make install-xinetd

2.配置nrpe

#vim /etc/xinetd.d/nrpe
在only_from=127.0.0.1 後新增 192.168.6.6 以空格隔開

3.新增埠

#vim /etc/services       在最後新增   nrpe  5666/tcp   #nrpe

修改配置檔案/usr/local/nagios/etc/objects/commands.cfg加入對nrpe的支援

#vim /usr/local/nagios/etc/objects/commands.cfg     在末尾新增如下內容

##############################################################################
#nrpe set 
define command{ 
command_name check_nrpe 
command_line /usr/local/nagios/libexec/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ 
} 
##############################################################################

4.配置/usr/local/nagios/etc/nrpe.cfg 檔案

#cd /usr/local/nagios/etc/nrpe.cfg
#vim nrpe.cfg
將command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1 中的hda1改為: sda  如下：
command[check_sda]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda

將command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200  改為：
  command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 400 -c 450

新增 command[check_swap]=/usr/local/nagios/libexec/check_swap -w 90% -c 80%

儲存，退出。

重啟xinetd服務

OK，Nagios服務端安裝成功！！！

（四）Nagios客戶端安裝配置

#yum install -y openssl openssl-devel

#useradd -s /sbin/nlogin nagios

2.安裝nagios-plugin

# cd /opt/software/
#tar zxvf nagios-plugins-1.4.16.tar.gz
#cd nagios-plugin-1.4.16
#./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios --enable-libtap
--enable-redhat-pthread-workaround --with-apt-get-command --with-ping6-command --with-ping-command 
--with-mysql --with-gnutls --enable-extra-opts --with-openssl --with-trusted-path
#make
#make install

3.安裝配置nrpe

#yum install xinetd -y

#tar zxvf nrpe-2.12.tar.gz
#cd nrpe-2.12
#./configure && make all
#make install-plugin
#make install-daemon 
#make install-daemon-config 
#make install-xinetd

#vim /etc/xinetd.d/nrpe  
在only_from    = 127.0.0.1 後新增 nagios伺服器端IP地址 192.168.6.6 如下：
  only_from    = 127.0.0.1 192.168.6.6

#vim /etc/services
在檔案末尾新增 nrpe   5666/tcp      #nrpe

修改/usr/local/nagios/etc/nrpe.cfg

#cp -p  /usr/local/nagios/etc/nrpe.cfg    /usr/local/nagios/etc/nrpe.cfg.default   -修改前先備份一下該配置檔案

#vim /usr/local/nagios/etc/nrpe.cfg
將nrpe.cfg檔案中的 hda1 字元全部修改為 sda  
或者使用sed命令批量修改，如下：
sed  -i 's/hda1/sda/g'  /usr/local/nagios/etc/nrpe.cfg

新增swep分割槽監控：  command[check_swap]=/usr/local/nagios/libexec/check_swap -w 90% -c 80%

儲存，退出。

重啟xinetd服務 ：
#service xinetd restart
 

（五） 在服務端/usr/local/nagios/etc/servers/目錄中新增編輯被監控主機配置檔案

1.本地主機配置檔案模版

#cd /usr/local/nagios/etc/servers
#touch localhost.cfg   注：localhost.cfg 為本地主機配置檔案
#vim localhost.cfg   新增如下模版內容
##########################################################################################
#define  host

define host{ 
host_name 192.168.6.6-nagios server     #主機名稱，可隨便定義
alias nagios Server                     #伺服器別名，監控端為Server 被監控端為 Client
address 192.168.6.6                     #伺服器端IP地址 或者被監控端IP地址
check_command check-host-alive          #檢查的命令
check_interval 1 
#retry_interval 1 
max_check_attempts 1 
check_period 24x7                       #檢查的時間範圍
process_perf_data 0 
retain_nonstatus_information 0 
contact_groups admins                   #聯絡人組
notification_interval 10                #檢查時間間隔，單位為分鐘 
notification_period 24x7 
notification_options d,u,r              #通知選項，d-宕機(down)  w-報警(warning)  u-未知（unkown) c-嚴重（critical) r-從異常情況恢復
}

#define services

#define check-host-alive
define service { 
host_name 192.168.6.6-nagios server 
service_description check-host-alive 
check_period 24x7 
max_check_attempts 1 
normal_check_interval 1 
#retry_check_interval 1 
contact_groups admins 
notification_interval 10 
notification_period 24x7 
notification_options w,u,c,r 
check_command check-host-alive 
}

define service { 
host_name 192.168.6.6-nagios server 
service_description check-users 
check_period 24x7 
max_check_attempts 4 
normal_check_interval 1 
retry_check_interval 1 
contact_groups admins 
notification_interval 10 
notification_period 24x7 
notification_options w,u,c,r 
check_command check_nrpe!check_users 
}

define service { 
host_name 192.168.6.6-nagios server 
service_description check-load 
check_period 24x7 
max_check_attempts 4 
normal_check_interval 1 
retry_check_interval 1 
contact_groups admins 
notification_interval 10 
notification_period 24x7 
notification_options w,u,c,r 
check_command check_nrpe!check_load 
}

define service { 
host_name 192.168.6.6-nagios server 
service_description check-total-procs 
check_period 24x7 
max_check_attempts 4 
normal_check_interval 1 
retry_check_interval 1 
contact_groups admins 
notification_interval 10 
notification_period 24x7 
notification_options w,u,c,r 
check_command check_nrpe!check_total_procs 
}

define service {
host_name 192.168.6.6-nagios server
service_description check_sda
check_period 24x7
max_check_attempts 4
normal_check_interval 1
retry_check_interval 1
contact_groups admins
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
check_command check_nrpe!check_sda
}

define service {
host_name 192.168.6.6-nagios server
service_description check_swap
check_period 24x7
max_check_attempts 4
normal_check_interval 1
retry_check_interval 1
contact_groups admins
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
check_command check_nrpe!check_swap
}
########################################################################################

2.其它主機配置檔案模版

#cd /usr/local/nagios/etc/servers/
#touch 192.168.2.33.cfg
#vim 192.168.2.33.cfg   新增如下內容

##################################################################################
#define  host

define host{ 
host_name 192.168.2.33-Test 
alias nagios Client 
address 192.168.2.33 
check_command check-host-alive 
check_interval 1 
#retry_interval 1 
max_check_attempts 1 
check_period 24x7 
process_perf_data 0 
retain_nonstatus_information 0 
contact_groups admins 
notification_interval 10 
notification_period 24x7 
notification_options d,u,r 
}

#define check-host-alive
define service { 
host_name 192.168.2.33-Test 
service_description check-host-alive 
check_period 24x7 
max_check_attempts 1 
normal_check_interval 1 
#retry_check_interval 1 
contact_groups admins 
notification_interval 10 
notification_period 24x7 
notification_options w,u,c,r 
check_command check-host-alive 
}

define service { 
host_name 192.168.2.33-Test 
service_description check-users 
check_period 24x7 
max_check_attempts 4 
normal_check_interval 1 
retry_check_interval 1 
contact_groups admins 
notification_interval 10 
notification_period 24x7 
notification_options w,u,c,r 
check_command check_nrpe!check_users 
}

define service { 
host_name 192.168.2.33-Test 
service_description check-load 
check_period 24x7 
max_check_attempts 4 
normal_check_interval 1 
retry_check_interval 1 
contact_groups admins 
notification_interval 10 
notification_period 24x7 
notification_options w,u,c,r 
check_command check_nrpe!check_load 
}

define service { 
host_name 192.168.2.33-Test
service_description check-total-procs 
check_period 24x7 
max_check_attempts 4 
normal_check_interval 1 
retry_check_interval 1 
contact_groups admins 
notification_interval 10 
notification_period 24x7 
notification_options w,u,c,r 
check_command check_nrpe!check_total_procs 
}

define service {
host_name 192.168.2.33-Test
service_description check_sda
check_period 24x7
max_check_attempts 4
normal_check_interval 1
retry_check_interval 1
contact_groups admins
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
check_command check_nrpe!check_sda
}

define service {
host_name 192.168.2.33-Test
service_description check_swap
check_period 24x7
max_check_attempts 4
normal_check_interval 1
retry_check_interval 1
contact_groups admins
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
check_command check_nrpe!check_swap
}
##############################################################################################

3.監控伺服器監控執行的埠

（1）Nagios客戶端配置

#vim /usr/local/nagios/etc/nrpe.cfg  檔案末尾新增定義埠資訊，如下：

command[check_TemplateUpload:8080]=/usr/local/nagios/libexec/check_tcp -H localhost -p 8080  -w 120 -c 180

儲存，退出

重啟xinetd服務

#service xinetd restart

（2）Nagios服務端配置

#vim /usr/local/nagios/etc/services/192.168.2.33.cfg 檔案末尾新增如下內容

define service {
host_name 192.168.2.33-Test
service_description check_TemplateUpload:8080  
check_period 24x7
max_check_attempts 4
normal_check_interval 1
retry_check_interval 1
contact_groups admins
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
check_command check_nrpe!check_TemplateUpload:8080
}

儲存，退出

重啟nagios服務

#service nagios restart

訪問Nagios服務

大功告成！！！！！