Nagios 4.0.1版本安裝，適用於RHEL/CentOS 5.x/6.x 或者Fedora 17/18/19。
我的環境如下：
Centos-6.2
Nagios 4.0.1
Nagios Plugin 1.5
Nagios是一個非常棒的免費的開源的監控工具，它提供給你一個很全面的監控環境，始終密切監視你的機器或者網絡，不管是在數據中心還是在你自己的一個小實驗室。
步驟1：安裝需要的依賴包
需要安裝Apache、PHP和一些庫像：gcc、glibc、glibc-common、gd、gd-devel、make、net-snmp
[root@taoteng ~]# yum install -y httpd php gcc glibc glibc-common gd gd-devel make net-snmp
步驟2:創建一個nagios用戶和組
創建一個新的nagios用戶和nagcmd組賬戶並設置密碼。
[root@taoteng ~]# useradd nagios
[root@taoteng ~]# groupadd nagcmd
接下來，添加nagios和Apache用戶到nagcmd組。
[root@tecmint]# usermod -G nagcmd nagios
[root@tecmint]# usermod -G nagcmd apache
步驟3：下載Nagios-4.0.1和Nagios-plugin-1.5
在/root目錄下創建一個安裝包以及後續需要下載的安裝包的目錄。
[root@taoteng ~]# mkdir /root/nagios
[root@taoteng ~]# cd /root/nagios
現在來下載最新版本的Nagio-4.0.1和Nagios-plugin-1.5通過wget命令
[root@taoteng nagios]# wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-4.0.1.tar.gz
[root@taoteng nagios]# wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz
步驟4：提取Nagios和nagios-plugins壓縮包
我們需要通過tar命令來提取下載的壓縮包裡面的文件：
[root@taoteng nagios]# tar -zxvf nagios-4.0.1.tar.gz
[root@taoteng nagios]# tar -zxvf nagios-plugins-1.5.tar.gz
緊接著nagios文件夾裡面將會出現解壓之後的文件夾
[root@taoteng nagios]# ll
總用量 30668
drwxrwxr-x 18 root root 4096 2月 20 21:22 nagios-4.0.1
-r-xr-xr-x 1 root root 1696847 2月 20 20:58 nagios-4.0.1.tar.gz
drwxr-xr-x 15 nagios nagios 4096 2月 24 00:58 nagios-cn-3.2.3
-r-xr-xr-x 1 root root 9638175 2月 20 20:58 nagios-cn-3.2.3.tar.bz2
drwxr-xr-x 15 200 300 4096 2月 20 22:04 nagios-plugins-1.5
-r-xr-xr-x 1 root root 2428258 2月 20 20:58 nagios-plugins-1.5.tar.gz
配置nagios的核心
現在，首先我們將配置nagios核心，將進入到nagios文件夾裡面運行configure命令，如果一切運行順利將會出現下面的界面：
[root@taoteng nagios]# cd nagios-4.0.1
[root@taoteng nagios-4.0.1]# ./configure --with-command-group=nagcmd
輸出示例：
Nagios executable: nagios Nagios user/group: nagios,nagios Command user/group: nagios,nagcmd Event Broker: yes Install ${prefix}: /usr/local/nagios Install ${includedir}: /usr/local/nagios/include/nagios Lock file: ${prefix}/var/nagios.lock Check result directory: ${prefix}/var/spool/checkresults Init directory: /etc/rc.d/init.d Apache conf.d directory: /etc/httpd/conf.d Mail program: /bin/mail Host OS: linux-gnu Web Interface Options: ------------------------ HTML URL: http://localhost/nagios/ CGI URL: http://localhost/nagios/cgi-bin/ Traceroute (used by WAP): /bin/tracerouteReview the options above for accuracy. If they look okay,type 'make all' to compile the main program and CGIs.
隨後配置和編譯所有的的二進制文件，make和make install將會在你的機器上安裝所需的二進制文件然後才能繼續安裝，
[root@taoteng nagios-4.0.1]# make
[root@taoteng nagios-4.0.1]# make install
輸出樣例：
*** Main program, CGIs and HTML files installed ***You can continue with installing Nagios as follows (type 'make'without any arguments for a list of all possible options): make install-init - This installs the init script in /etc/rc.d/init.d make install-commandmode - This installs and configures permissions on the directory for holding the external command file make install-config - This installs sample config files in /usr/local/nagios/etc
其實從上面的樣例上可以看出下步我們需要的操作步驟，接著執行make install-init去安裝初始化腳本。
[root@taoteng nagios-4.0.1]# make install-init
從輸出的命令行上可以看出我們需要安裝外部命令文件(libxce)
[root@taoteng nagios-4.0.1]# make install-commandmode
接下來安裝nagios示例文件，運行下面的命令：
[root@taoteng nagios-4.0.1]# make install-config
輸出示例：
/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/etc/usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/etc/objects/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/nagios.cfg /usr/local/nagios/etc/nagios.cfg/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/cgi.cfg /usr/local/nagios/etc/cgi.cfg/usr/bin/install -c -b -m 660 -o nagios -g nagios sample-config/resource.cfg /usr/local/nagios/etc/resource.cfg/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/templates.cfg /usr/local/nagios/etc/objects/templates.cfg/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/commands.cfg /usr/local/nagios/etc/objects/commands.cfg/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/contacts.cfg /usr/local/nagios/etc/objects/contacts.cfg/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/timeperiods.cfg /usr/local/nagios/etc/objects/timeperiods.cfg/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/localhost.cfg /usr/local/nagios/etc/objects/localhost.cfg/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/windows.cfg /usr/local/nagios/etc/objects/windows.cfg/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/printer.cfg /usr/local/nagios/etc/objects/printer.cfg/usr/bin/install -c -b -m 664 -o nagios -g nagios sample-config/template-object/switch.cfg /usr/local/nagios/etc/objects/switch.cfg*** Config files installed ***Remember, these are *SAMPLE* config files. You'll need to readthe documentation for more information on how to actually defineservices, hosts, etc. to fit your particular needs.
步驟5：自定義nagios配置文件
打開“contacts.cfg”文件編輯當出現報警狀態時候的nagios管理員的電子郵箱
[root@taoteng nagios-4.0.1]# vi /usr/local/nagios/etc/objects/contacts.cfg
輸出樣例：
###############################################################################
#
# CONTACTS
#
###############################################################################
###############################################################################
# Just one contact defined by default - the Nagios admin (that's you)
# This contact definition inherits a lot of default values from the 'generic-contact'
# template which is defined elsewhere.
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 [email protected] ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
}
步驟6：安裝和配置Nagios的web接口
到目前為止，我們已經完成了所有的配置，接下來將用下面的命令來配置Nagios的web接口。
下面的命令將配置web接口並同時創建一個“nagiosadmin”管理用戶。
[root@taoteng nagios-4.0.1]# make install-webconf
接下來的這步將會創建一個密碼為“nagiosadmin”記住這個密碼，因為待會兒在浏覽器中登錄的時候將會用到這個密碼。
[root@taoteng nagios-4.0.1]# htpasswd -s -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
New password:
Re-type new password:
Adding password for user nagiosadmin
重啟Apache服務使新的配置生效。
[root@taoteng nagios-4.0.1]# service httpd restart (On RedHat/CentOS)
[root@taoteng nagios-4.0.1]# systemctl start httpd.service (On Fedora)
Nagios 的詳細介紹：請點這裡
Nagios 的下載地址：請點這裡
