Linux运维:CentOS7安装Nagios4.3.4

╰半夏微凉° 2022-05-08 13:24 286阅读 0赞

Nagios是一套开源的监控系统,可监控你的系统和网络.  
Nagios最新版本是Nagios Core 4.3.4,Nagios plugins 2.2.1.  
目前支持RHEL 7.x/6.x/5.x, CentOS 7.x/6.x/5.x 等系统.本文以CentOS7为平台.

安装Nagios 4.3.4 and Nagios Plugin 2.2  
假如你根据本手册正确安装后,你应该能找到以下信息:

*  nagios,plugin安装目录 /usr/local/nagios
 *  默认监控本机服务(Disk Usage, CPU Load, Current Users, Total Processes)
 *  可以通过浏览器访问 [http://localhost/nagios][http_localhost_nagios]

## step1 安装依赖软件 ##

安装需要apache,php,gcc等.

[root@host]# yum install -y httpd httpd-tools php gcc glibc glibc-common gd gd-devel make net-snmp

## step2 创建nagios用户和用户组 ##

创建nagios用户和组,并设置密码

[root@host] useradd nagios
    [root@host] groupadd nagcmd

将nagios和apache加入 nagios组

[root@host]usermod -G nagcmd nagios
    [root@host] usermod -G nagcmd apache

## step3 下载nagios4.3,nagios plugin 2.2 ##

创建一个nagios下载目录

[root@host]# mkdir /root/nagios
    [root@host]# cd /root/nagios

适用wget 下载最新版本

[root@host]# wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.3.4.tar.gz
    [root@host]# wget https://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz

## step4 解压 ##

[root@host nagios~]# tar -xvf nagios-4.3.4.tar.gz
    [root@hostnagios~]# tar -xvf nagios-plugins-2.2.1.tar.gz

解压后有2个新的文件夹

[root@host nagios ~]# ls -l
    drwxrwxr-x 18 root root     4096 Aug 24 17:43 nagios-4.3.4
    drwxr-xr-x 15 root root     4096 Apr 19 12:04 nagios-plugins-2.2.1

## 配置Nagios ##

进入nagios目录,进行配置

[root@host nagios~]# cd nagios-4.3.4/
    [root@host nagios-4.3.4 ]# ./configure --with-command-group=nagcmd

sample配置文件:

Creating sample config files in sample-config/ ...
    
    *** Configuration summary for nagios 4.3.4 2017-08-24 ***:
    
     General Options:
     -------------------------
            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:  /run/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:  /usr/bin/mail
                      Host OS:  linux-gnu
              IOBroker Method:  epoll
    
     Web Interface Options:
     ------------------------
                     HTML URL:  http://localhost/nagios/
                      CGI URL:  http://localhost/nagios/cgi-bin/
     Traceroute (used by WAP):  /usr/bin/traceroute
    
    
    Review the options above for accuracy.  If they look okay,
    type 'make all' to compile the main program and CGIs.

编译,安装包

[root@host nagios-4.3.4 ]# make all
    [root@host nagios-4.3.4 ]# make install
    
    *** Exfoliation theme installed ***
    NOTE: Use 'make install-classicui' to revert to classic Nagios theme
    
    make[1]: Leaving directory `/root/nagios/nagios-4.3.4'
    make install-basic
    make[1]: Entering directory `/root/nagios/nagios-4.3.4'
    /usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/libexec
    /usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/var
    /usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/var/archives
    /usr/bin/install -c -m 775 -o nagios -g nagcmd -d /usr/local/nagios/var/spool/checkresults
    chmod g+s /usr/local/nagios/var/spool/checkresults
    
    *** 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
    
    make[1]: Leaving directory `/root/nagios/nagios-4.3.4'

安装初始化init脚本

[root@host nagios-4.3.4 ]# make install-init

安装命令行运行脚本

[root@host nagios-4.3.4 ]# make install-commandmode

安装样本脚本

[root@host nagios-4.3.4 ]# make install-config
    /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 read
    the documentation for more information on how to actually define
    services, hosts, etc. to fit your particular needs.

## step 5 按自己需求配置 ##

配置联系人

# vi /usr/local/nagios/etc/objects/contacts.cfg
    
    ###############################################################################
    ###############################################################################
    #
    # 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                           admin@tecmint.com     ; *** CHANGE THIS TO YOUR EMAIL ADDRESS ****
           }

## step 6 安装配置web接口 ##

配置web接口,首先会创建管理员账号 nagiosadmin,并要求输入管理密码

[root@host nagios-4.3.4 ]# make install-webconf
    
    [root@host  nagios-4.3.4]# htpasswd -s -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
    New password:
    Re-type new password:
    Adding password for user nagiosadmin

重启apache,使配置生效

[root@host ]# service httpd start              
    [root@host ]# systemctl start httpd.service

## step7 编译安装nagios plugin ##

按如下命令运行

[root@host nagios]# cd /root/nagios
    [root@host nagios]# cd nagios-plugins-2.2.1/
    [root@host nagios]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios
    [root@host nagios]# make
    [root@hostt nagios]# make install

## step8 验证nagios配置文件 ##

已经完成所有安装,按一下命令验证配置文件

[root@host nagios]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
    
    Nagios Core 4.3.4
    Copyright (c) 2009-present Nagios Core Development Team and Community Contributors
    Copyright (c) 1999-2009 Ethan Galstad
    Last Modified: 2017-08-24
    License: GPL
    
    Website: https://www.nagios.org
    Reading configuration data...
       Read main config file okay...
       Read object config files okay...
    
    Running pre-flight check on configuration data...
    
    Checking objects...
    	Checked 8 services.
    	Checked 1 hosts.
    	Checked 1 host groups.
    	Checked 0 service groups.
    	Checked 1 contacts.
    	Checked 1 contact groups.
    	Checked 24 commands.
    	Checked 5 time periods.
    	Checked 0 host escalations.
    	Checked 0 service escalations.
    Checking for circular paths...
    	Checked 1 hosts
    	Checked 0 service dependencies
    	Checked 0 host dependencies
    	Checked 5 timeperiods
    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

## step 9 将nagios加到系统服务中 ##

[root@host ]# systemctl enable nagios
    [root@host ]# systemctl enable httpd
    [root@host]# systemctl start nagios.service

## Step 10: 适用浏览器访问nagios ##

在浏览器中输入 “[http://Your-server-IP-address/nagios”][http_Your-server-IP-address_nagios] or “[http://FQDN/nagios”][http_FQDN_nagios] ,并输入账号和密码.

![在这里插入图片描述][70]

host view  
![在这里插入图片描述][70 1]

service view  
![在这里插入图片描述][70 2]

## 补充一下,升级nagios3到nagios4 ##

假如你是旧版本,你可以随时升级到最新版本,你可以下载最新版本,按以下命令升级.

[root@host  ]# service nagios stop
    [root@host  ]# wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.3.4.tar.gz
    [root@host  ]# tar -zxvf nagios-4.3.4.tar.gz
    [root@host  ]# cd nagios-4.3.4
    [root@host  ]# ./configure
    [root@host  ]# make all
    [root@host  ]# make install
    [root@host  ]# service nagios start

[http_localhost_nagios]: http://localhost/nagios
[http_Your-server-IP-address_nagios]: http://Your-server-IP-address/nagios%E2%80%9D
[http_FQDN_nagios]: http://FQDN/nagios%E2%80%9D
[70]: /images/20220508/247395dcd53a4f9a982ab53a55dedd2a.png
[70 1]: /images/20220508/ddf8566222ec43a68d833db8ca7289d8.png
[70 2]: /images/20220508/bdc21d69bc894e7792dc39d3447c6085.png