[rhel6.5]安装配置nagios本机监控,以及远程监控其他主机

矫情吗；* 2022-05-30 05:19 202阅读 0赞

*  **\[rhel6.5\]安装配置`nagios`**
    
    > 系统环境:  
    > `nagios`主机:`server20.com 172.25.23.20`  
    > `mysql`主机`server20.com 172.25.23.21`  
    > `nrpe`主机;`server21.com`: `172.25.23.21`  
    > 需要的软件:  
    > `nagios-cn-3.2.3.tar.bz2`  
    > `nagios-plugins-2.1.1.tar.gz`  
    > `nrpe-2.15.tar.gz`
 *  **需要注意的几项**
 *  1.确定关闭`iptables`;
 *  2.确定`selinux`不启用;
 *  **首先在`nagios上面配置ngios主机`**
 *  首先配置主机的依赖关系

[root@server20 ~]# yum install httpd gcc make gd-devel perl-ExtUtils-Embed.x86_64 -y

*  添加nagios运行的用户nagios

[root@server20 ~]# useradd nagios

*  使apache用于对于nagios具有写权限

[root@server20 ~]# id apache
    uid=48(apache) gid=48(apache) groups=48(apache)
    [root@server20 ~]# usermod -G nagios apache

*  解压nagios软件,并且尝试进行安装

[root@server20 ~]# tar -jxf /mnt/nagios-cn-3.2.3.tar.bz2 -C /usr/local/

*  进行软件的安装

[root@server20 nagios-cn-3.2.3]# cd /usr/local/nagios-cn-3.2.3/
    [root@server20 nagios-cn-3.2.3]# ./configure --enable-embedded-perl
    [root@server20 nagios-cn-3.2.3]# make all 
    [root@server20 nagios-cn-3.2.3]# make install 
    
    [root@server20 nagios-cn-3.2.3]# make install-init
    /usr/bin/install -c -m 755 -d -o root -g root /etc/rc.d/init.d
    /usr/bin/install -c -m 755 -o root -g root daemon-init /etc/rc.d/init.d/nagios
    
    *** Init script installed ***
    
    [root@server20 nagios-cn-3.2.3]# make install-commandmode
    /usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/var/rw
    chmod g+s /usr/local/nagios/var/rw
    
    *** External command directory configured ***
    
    [root@server20 nagios-cn-3.2.3]# 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
    
    [root@server20 nagios-cn-3.2.3]# make install-webconf
    /usr/bin/install -c -m 644 sample-config/httpd.conf /etc/httpd/conf.d/nagios.conf
    
    *** Nagios/Apache conf file installed ***

*  配置`Nagios`的管理用户帐号

[root@server20 ~]# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

*  **接下来需要编译nagios的插件,也就是用于或者各种服务状态的插件**
 *  首先配置编译环境

[root@server20 ~]# yum install mysql-devel openssl-devel -y

*  然后解压软件,并且进行安装

[root@server20 ~]# tar zxf /mnt/nagios-plugins-2.1.1.tar.gz -C /usr/local/
    
    [root@server20 ~]# cd /usr/local/nagios-plugins-2.1.1/
    
    [root@server20 nagios-plugins-2.1.1]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-extra-opts --enable-libtap --enable-perl-modules --with-cgiurl --with-perl 
    [root@server20 nagios-plugins-2.1.1]# make 
    [root@server20 nagios-plugins-2.1.1]# make install

*  更改配置文件

[root@server20 ~]# vim /usr/local/nagios/etc/nagios.cfg 
    cfg_file=/usr/local/nagios/etc/objects/hosts.cfg
    cfg_file=/usr/local/nagios/etc/objects/service.cfg
    #cfg_file=/usr/local/nagios/etc/objects/localhost.cfg

*  然后创建`hosts.cfg`文件

[root@server20 ~]# vim /usr/local/nagios/etc/objects/hosts.cfg 
    define host{
        use     linux-server
        host_name 监控主机
        alias   nagios 服务器
        address 127.0.0.1
        icon_image  web.gif
        statusmap_image web.gd2
    # check_command check-host-alive
        2d_coords   100,300
        3d_coords   100,300,100
    }
    
    define hostgroup{
        hostgroup_name Linux-servers
        alias   Linux Servers
        members *
    }

*  创建`service.cfg`文件

[root@server20 ~]# vim /usr/local/nagios/etc/objects/service.cfg
    
    define service{
        use         local-service
        host_name       *
        service_description PING
        check_command       check-host-alive
    }
    define service{
        use         local-service
        host_name       监控主机
        service_groups      系统状况检查
        service_description  登录用户数
        check_command       check_local_users!20!50
    }
    define service{
        use         local-service
        host_name        监控主机
        service_groups       系统状况检查
        service_description  根分区
        check_command        check_local_disk!20%!10%!/
    }
    define service{
        use          local-service
        host_name        监控主机
        service_groups       系统状况检查
        service_description  进程总数
        check_command        check_local_procs!250!400!RSZDT
    }
    
    define service{
        use          local-service
        host_name        监控主机
        service_groups       系统状况检查
        service_description  系统负载
        check_command        check_local_load!5.0,4.0,3.0!10.0,6.0,4.0
    }
    
    define service{
        use         local-service
        host_name       监控主机
        service_groups      系统状况检查  
        service_description     交换空间利用率
        check_command       check_local_swap!20!10
    }
    
    #服务组并不是必须的,这是配合 nagios 的监控页面的显示
    define servicegroup{    
        servicegroup_name   系统状况检查
        alias           系统概况
    }

*  使用命令检查配置文件的修改后的合法性

[root@server20 ~]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg 
    
    Nagios Core 3.2.3
    Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors
    Copyright (c) 1999-2009 Ethan Galstad
    Last Modified: 10-03-2010
    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 file '/usr/local/nagios/etc/objects/hosts.cfg'...
    Processing object config file '/usr/local/nagios/etc/objects/service.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 1 host groups.
    Checking service groups...
        Checked 1 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 24 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

*  这里必须确定配置文件修改后是正确的  
    ![这里写图片描述][70]
 *  为nagios创建管理用户并且创建密码

[root@server20 ~]# htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

*  启动服务

[root@server20 ~]# service nagios start
    [root@server20 ~]# service httpd start

*  使用浏览器进行访问,并且尝试登陆,用户是`nagisoadmin`密码是上面设定的密码

![这里写图片描述][70 1]  
\* 接下来可以看到这个界面  
![这里写图片描述][70 2]  
\* 出现未决状态的原因是因为还没有到状态的检测时间;

*  **接下来配置`Nagios`连接本地的`mysql`主机**
 *  首先需要创建`Mysql`主机上面的测试用户`nagdb`

[root@server20 html]# mysql -uroot -p
    Enter password: 
    Welcome to the MySQL monitor.  Commands end with ; or \g.
    Your MySQL connection id is 4
    Server version: 5.1.71 Source distribution
    
    mysql> create database nagdb;
    Query OK, 1 row affected (0.00 sec)
    
    mysql> grant select on nagdb.* to nagdb@'172.25.23.20';
    Query OK, 0 rows affected (0.00 sec)
    
    mysql> grant select on nagdb.* to nagdb@'172.25.23.21';
    Query OK, 0 rows affected (0.00 sec)
    
    mysql> flush privileges;
    Query OK, 0 rows affected (0.00 sec)

*  使用命令测试连接数据库

[root@server20 html]# /usr/local/nagios/libexec/check_mysql -H 172.25.23.20 -u nagdb -d nagdb
    Uptime: 461  Threads: 1  Questions: 2125  Slow queries: 0  Opens: 33  Flush tables: 1  Open tables: 24  Queries per second avg: 4.609|Connections=18c;;; Open_files=44;;; Open_tables=24;;; Qcache_free_memory=0;;; Qcache_hits=0c;;; Qcache_inserts=0c;;; Qcache_lowmem_prunes=0c;;; Qcache_not_cached=0c;;; Qcache_queries_in_cache=0;;; Queries=2125c;;; Questions=2125c;;; Table_locks_waited=2c;;; Threads_connected=1;;; Threads_running=1;;; Uptime=461c;;;

*  然后需要配置`hosts.cfg`

[root@server20 html]# vim /usr/local/nagios/etc/objects/hosts.cfg 
    添加:
    
    define host{
            use             linux-server
            host_name       mysql 主机
            alias           mysql 服务器
            address         172.25.23.20
            icon_image      server.gif
            statusmap_image server.gd2
            2d_coords       500,200
            3d_coords       500,200,100
    }

*  接下来更改`service.cfg`

[root@server20 html]# vim /usr/local/nagios/etc/objects/service.cfg
    
    define service{
            use                      local-service
            host_name                mysql 主机
            servce_groups            mysql 服务组
            service_description      mysql 服务
            check_command            check_mysql
    }
    
    
    define servicegroup{
            servicegroup_name        mysql 服务组
            alias                    mysql 服务器
    }

*  最后更改`command.cfg`

define command{
            command_name check_mysql
            command_line $USER1$/check_mysql -H $HOSTADDRESS$ -u nagdb -d nagdb
    }

*  重新检测配置文件的合法性

[root@server20 html]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg 
    
    Nagios Core 3.2.3
    Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors
    Copyright (c) 1999-2009 Ethan Galstad
    Last Modified: 10-03-2010
    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 file '/usr/local/nagios/etc/objects/hosts.cfg'...
    Processing object config file '/usr/local/nagios/etc/objects/service.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 1 host groups.
    Checking service groups...
        Checked 1 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 24 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

*  通知服务器重新加载配置文件

[root@server20 html]# service nagios reload
    Running configuration check...done.
    Reloading nagios configuration...done

*  使用浏览器访问可以得到数据库的状态信息  
    ![这里写图片描述][70 3]
 *  **接下来配置`Nagios`监控远程主机**
 *  这里使用的远程主机是`server21.com`
 *  首先需要创建用户

[root@server21 ~]# useradd nagios
    [root@server21 ~]# id nagios
    uid=500(nagios) gid=500(nagios) groups=500(nagios)

*  安装`nagiso-plugins`插件

[root@server21 ~]# tar -zxf /mnt/nagios-plugins-2.1.1.tar.gz -C /usr/local/
    
    [root@server21 ~]# cd /usr/local/nagios-plugins-2.1.1/

*  然后进行编译安装,执行属主和属组

[root@server21 nagios-plugins-2.1.1]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios
    
    [root@server21 nagios-plugins-2.1.1]# make 
    
    [root@server21 nagios-plugins-2.1.1]# make install

*  接下来需要安装`nrpe`
 *  首先来安装xinetd服务

[root@server21 nagios-plugins-2.1.1]# yum install xinetd -y

*  接下来进行编译安装

[root@server21 mnt]# tar -zxf nrpe-2.15.tar.gz -C /usr/local/
    [root@server21 mnt]# cd /usr/local/nrpe-2.15/
    [root@server21 nrpe-2.15]# ./configure
    ..................................................
    *** Configuration summary for nrpe 2.15 09-06-2013 ***:
    
     General Options:
     -------------------------
     NRPE port:    5666
     NRPE user:    nagios
     NRPE group:   nagios
     Nagios user:  nagios
     Nagios group: nagios
    
    
    Review the options above for accuracy.  If they look okay,
    type 'make all' to compile the NRPE daemon and client
    
    [root@server21 nrpe-2.15]# make all
    [root@server21 nrpe-2.15]# make install-plugin
    [root@server21 nrpe-2.15]# make install-daemon
    [root@server21 nrpe-2.15]# make install-daemon-config
    [root@server21 nrpe-2.15]# make install-xinetd

*  接下来配置`nrpe`

[root@server21 nrpe-2.15]# vim /etc/xinetd.d/nrpe 
    # default: on
    # description: NRPE (Nagios Remote Plugin Executor)
    service nrpe
    {
            flags           = REUSE
            socket_type     = stream
            port            = 5666
            wait            = no
            user            = nagios
            group           = nagios
            server          = /usr/local/nagios/bin/nrpe server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd
            log_on_failure  += USERID
            disable         = no
            only_from       = 172.25.23.20
    }

*  添加`nrpe`的端口信息

[root@server21 nrpe-2.15]# vim /etc/services
    nrpe            5666/tcp                # nrpe监听端口

*  配置磁盘检查的选项

[root@server21 nrpe-2.15]# vim /usr/local/nagios/etc/nrpe.cfg 
    command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /

*  确保服务启动,并且端口正常开始

[root@server21 nrpe-2.15]# service xinetd restart
    Stopping xinetd:                                           [FAILED]
    Starting xinetd:                                           [  OK  ]
    [root@server21 nrpe-2.15]# netstat -antlp | grep 5666
    tcp        0      0 :::5666                     :::*                        LISTEN      22567/xinetd

*  **接下来需要配置监控主机**
 *  首先解压安装`nrpe`

[root@server20 mnt]# tar -zxf nrpe-2.15.tar.gz -C /usr/local/
    
    [root@server20 mnt]# cd /usr/local/nrpe-2.15/
    [root@server20 nrpe-2.15]# ./configure --with-nagios-user=nagios --with-nagios-group=nagios
    
    [root@server20 nrpe-2.15]# make all 
    
    [root@server20 nrpe-2.15]# make install-plugin

*  使用命令测试远程主机的`nrpe`是否是正常的

[root@server20 nrpe-2.15]# /usr/local/nagios/libexec/check_nrpe -H 172.25.23.21
    NRPE v2.15

*  修改监控主机的`command.cfg`

define command{
            command_name     check_nrpe
            command_line     $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ }

*  这里需要修改hosts文件

添加
    define host{
            use             linux-server
            host_name       server21.com  //这个远程主机的地址;
            alias           server21.com 状态
            address         172.25.23.21
            icon_image      server.gif
            statusmap_image server.gd2
            2d_coords       500,200
            3d_coords       500,200,100
    }

*  修改`service.cfg`文件

define service{
        use          generic-service
        host_name server21.com
        service_description  CPU Load
        check_command        check_nrpe!check_load
    }
    
    define service{
        use          generic-service
        host_name       server21.com
        service_description      Current Users
        check_command        check_nrpe!check_users
    } 
    
    
    define service{
        use         generic-service
        host_name       server21.com
        service_description / Free Space
        check_command       check_nrpe!check_disk
    }
    
    define service{
        use         generic-service
        host_name       server21.com
        service_description Total Processes
        check_command       check_nrpe!check_total_procs
    }
    
    
    define service{
        use         generic-service
        host_name       server21.com
        service_description Zombie Processes
        check_command       check_nrpe!check_zombie_procs
    }

*  接下来需要重新检测\[配置文件的语法

[root@server20 nrpe-2.15]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
    
    Nagios Core 3.2.3
    Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors
    Copyright (c) 1999-2009 Ethan Galstad
    Last Modified: 10-03-2010
    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 file '/usr/local/nagios/etc/objects/hosts.cfg'...
    Processing object config file '/usr/local/nagios/etc/objects/service.cfg'...
       Read object config files okay...
    
    Running pre-flight check on configuration data...
    
    Checking services...
        Checked 13 services.
    Checking hosts...
        Checked 2 hosts.
    Checking host groups...
        Checked 1 host groups.
    Checking service groups...
        Checked 2 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 26 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

*  重新加载服务的配置文件  
    ![这里写图片描述][70 4]
 *  这里可以看到的是三个分组,`server21.com`表示的是远程主机,其余两个组均是本地主机

[70]: /images/20220530/e8806e3e020347c5a957b8d5612c41ff.png
[70 1]: /images/20220530/ccfad50129ec4c379209f2d15c8a8cd9.png
[70 2]: /images/20220530/3de180228b1f42b2b85ce54c9e4ae7bc.png
[70 3]: /images/20220530/fa311e98c2164e268bab07fc45651030.png
[70 4]: /images/20220530/0fa8500836af4721943010505e3a301c.png