• linux环境中安装NRPE插件执行远程"本地资源"检查?NRPE安装?


    需求描述:

      在安装完nagios之后,需要对本地资源进行监控,比如磁盘空间的使用,进程数,swap空间,等等.这些都不是通过网络提供出来的,

      所以,都是本地资源,可以通过NRPE插件实现在客户端中采集数据,然后通过网络传递给监控服务器,由监控服务器实现对传递过来

      的数据进行判断.

    环境描述:

      操作系统:RedHat6.6 x64

    安装过程:

    ----客户端----

    1.关闭selinux

    [root@testvm02 ~]# sed -i 's/SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config
    [root@testvm02 ~]# getenforce
    Permissive

    2.下载,上传nagios-plugins插件和nrpe插件

    nagios-plugins下载地址:https://www.nagios.org/downloads/nagios-plugins/

    nrpe下载地址:https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-3.2.1/nrpe-3.2.1.tar.gz

    [root@testvm03 software]# ls -ltr
    total 3080
    -rw-r--r--. 1 root root  419695 Jul 31 16:18 nrpe-2.15.tar.gz
    -rw-r--r--. 1 root root 2728818 Jul 31 16:18 nagios-plugins-2.2.1.tar.gz

    3.安装nrpe之前需要先安装nagios-plugins

      3.1安装需需要的软件包

    yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils

      3.2解压,编译,安装

    [root@testvm03 software]# tar -zxf nagios-plugins-2.2.1.tar.gz 
    [root@testvm03 software]# cd nagios-plugins-2.2.1
    [root@testvm03 nagios-plugins-2.2.1]# ./configure 
    [root@testvm03 nagios-plugins-2.2.1]# make
    [root@testvm03 nagios-plugins-2.2.1]# make install

    4.创建nagios用户组,用户

    [root@testvm03 nagios-plugins-2.2.1]# groupadd nagios
    [root@testvm03 nagios-plugins-2.2.1]# useradd -r -g nagios nagios

    5.解压,编译,安装nrpe

    [root@testvm03 software]# tar zxf nrpe-2.15.tar.gz 
    [root@testvm03 software]# cd nrpe-2.15
    [root@testvm03 nrpe-2.15]# ./configure 
    [root@testvm03 nrpe-2.15]# make all
    [root@testvm03 nrpe-2.15]# make install-daemon #安装nrpe命令.
    [root@testvm03 nrpe-2.15]# make install-daemon-config #安装nrpe配置文件
    /usr/bin/install -c -m 775 -o nagios -g nagios -d /usr/local/nagios/etc
    /usr/bin/install -c -m 644 -o nagios -g nagios sample-config/nrpe.cfg /usr/local/nagios/etc

    6.编辑nrpe.cfg(/usr/local/nagios/etc/nrpe.cfg)配置文件,增加监控主机的地址

    allowed_hosts=127.0.0.1,192.168.53.25      #找到allowed_hosts,增加监控主机的地址.

     7.将nrpe的启动脚本加入到/etc/init.d目录,加入到开机启动

    [root@testvm03 etc]# cd /opt/software/nrpe-2.15
    [root@testvm03 nrpe-2.15]# cp init-script /etc/init.d/nrpe
    [root@testvm03 nrpe-2.15]# chmod +x /etc/init.d/nrpe 
    [root@testvm03 nrpe-2.15]# chkconfig --add nrpe
    [root@testvm03 nrpe-2.15]# chkconfig --list | grep nrpe
    nrpe               0:off    1:off    2:on    3:on    4:on    5:on    6:off

    8.启动nrpe服务,查看程序监听的端口

    [root@testvm03 nrpe-2.15]# service nrpe start
    Starting nrpe:                                             [  OK  ]
    [root@testvm03 nrpe-2.15]# ps -ef | grep nrpe
    nagios   23979     1  0 16:43 ?        00:00:00 /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
    root     23982  1050  0 16:43 pts/0    00:00:00 grep nrpe

    [root@testvm03 nrpe-2.15]# netstat -ntlp | grep nrpe
    tcp        0      0 0.0.0.0:5666                0.0.0.0:*                   LISTEN      23979/nrpe           #nrpe监听端口是5666
    tcp        0      0 :::5666                     :::*                        LISTEN      23979/nrpe 

    ----监控服务器----

    1.关闭selinux

    [root@testvm02 ~]# sed -i 's/SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config
    [root@testvm02 ~]# getenforce
    Permissive

    2.上传nrpe包,解压,编译,安装

    [root@testvm02 softwares]# tar zxf nrpe-2.15.tar.gz 
    [root@testvm02 softwares]# cd nrpe-2.15
    [root@testvm02 nrpe-2.15]# ./configure 
    [root@testvm02 nrpe-2.15]# make all
    [root@testvm02 nrpe-2.15]# make install-plugin #安装check_nrpe插件而不是nrpe命令,要注意.

    3.检查nrpe_check插件已经正确安装

    [root@testvm02 nrpe-2.15]# ls /usr/local/nagios/libexec/check_nrpe 
    /usr/local/nagios/libexec/check_nrpe

    4.在nagios的commands.cfg中加入nrpe命令

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

    #特别注意不要有中文的中划线

    5.创建主机配置文件,修改cfg文件的权限

    define host {

        use                     linux-server
        host_name               192.168.53.26
        address                 192.168.53.26
    }

    define service {

        use                     generic-service,graphed-service           ; Name of service template to use
        host_name               192.168.53.26
        service_description     System_Load
        check_command           check_nrpe!check_load
    }

    define service {
        use                 generic-service,graphed-service
        host_name           192.168.53.26
        service_description disk_usage
        check_command       check_nrpe!check_disk
    }


    [root@testvm02 objects]# chown nagios:nagios 192.168.53.26.cfg

    7.创建nagios配置文件的目录,将配置文件归类存放

    mkdir -p /usr/local/nagios/etc/objects/commands
    mkdir -p /usr/local/nagios/etc/objects/timeperiods
    mkdir -p /usr/local/nagios/etc/objects/contacts
    mkdir -p /usr/local/nagios/etc/objects/contactgroups
    mkdir -p /usr/local/nagios/etc/objects/hosts
    mkdir -p /usr/local/nagios/etc/objects/hostgroups
    mkdir -p /usr/local/nagios/etc/objects/services
    mkdir -p /usr/local/nagios/etc/objects/servicegroups
    mkdir -p /usr/local/nagios/etc/objects/templates
    mkdir -p /usr/local/nagios/etc/objects/others

    将文件归类到具体的路径中:

    [root@testvm02 objects]# ls -ltr
    total 96
    -rw-rw-r--. 1 nagios nagios  1797 Jul 31 11:38 contacts.cfg
    -rw-rw-r--. 1 nagios nagios  3512 Jul 31 11:38 timeperiods.cfg
    -rw-rw-r--. 1 nagios nagios  4074 Jul 31 11:38 windows.cfg
    -rw-rw-r--. 1 nagios nagios  3001 Jul 31 11:38 printer.cfg
    -rw-rw-r--. 1 nagios nagios  3484 Jul 31 11:38 switch.cfg
    -rw-rw-r--. 1 nagios nagios 12869 Jul 31 14:44 templates.cfg
    -rw-rw-r--. 1 nagios nagios  4905 Jul 31 14:47 localhost.cfg
    -rw-rw-r--. 1 nagios nagios  7120 Jul 31 16:54 commands.cfg
    -rw-r--r--. 1 nagios nagios   446 Jul 31 17:03 192.168.53.26.cfg
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 commands
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 timeperiods
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 contacts
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 contactgroups
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 hosts
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 hostgroups
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 services
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 servicegroups
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 templates
    drwxr-xr-x. 2 root   root    4096 Jul 31 17:09 others
    [root@testvm02 objects]# mv 192.168.53.26.cfg hosts/
    [root@testvm02 objects]# mv localhost.cfg hosts/
    [root@testvm02 objects]# mv commands.cfg commands
    [root@testvm02 objects]# mv windows.cfg switch.cfg printer.cfg others/
    [root@testvm02 objects]# mv templates.cfg templates/
    [root@testvm02 objects]# mv timeperiods.cfg timeperiods/
    [root@testvm02 objects]# mv contacts.cfg contacts

    8.修改nagios.cfg配置文件,增加cfg_dir配置,将cfg_file的都注释掉

    cfg_dir=/usr/local/nagios/etc/objects/commands
    cfg_dir=/usr/local/nagios/etc/objects/timeperiods
    cfg_dir=/usr/local/nagios/etc/objects/contacts
    cfg_dir=/usr/local/nagios/etc/objects/contactgroups
    cfg_dir=/usr/local/nagios/etc/objects/hosts
    cfg_dir=/usr/local/nagios/etc/objects/hostgroups
    cfg_dir=/usr/local/nagios/etc/objects/services
    cfg_dir=/usr/local/nagios/etc/objects/servicegroups
    cfg_dir=/usr/local/nagios/etc/objects/templates             #不配置others目录,目的是对这些其他的设备不进行监控

    # You can specify individual object config files as shown below:
    #cfg_file=/usr/local/nagios/etc/objects/commands.cfg
    #cfg_file=/usr/local/nagios/etc/objects/contacts.cfg
    #cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg
    #cfg_file=/usr/local/nagios/etc/objects/templates.cfg

    # Definitions for monitoring the local (Linux) host
    #cfg_file=/usr/local/nagios/etc/objects/localhost.cfg

    9.重启nagios

    [root@testvm02 objects]# service nagios restart
    Running configuration check... Stopping nagios: .done.
    Starting nagios: Running configuration check... done.

    10.查看监控页面

    备注:系统负载已经能够正常的检查了.但是NRPE: Command 'check_disk' not defined,有这个错误.

    11.NRPE: Command 'check_disk' not defined 处理,在客户端的nrpe.cfg中配置check_disk命令及告警

    command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p / -C -w 20% -c 10% -p /boot    #指定检查特定的分区,设定告警,验证的百分比.
    #command后面的中括号内,就是定义的nrpe的命令.在server端调用的就是这个命令,然后在客户端执行,也可理解这个命令就是等号后面一长串的别名.

     12.重启客户端的nrpe

    [root@testvm03 etc]# service nrpe restart
    Shutting down nrpe:                                        [  OK  ]
    Starting nrpe:                                             [  OK  ]

     13.查看nagios的页面

    备注:已经能够监控到远程的磁盘空间使用情况了,并且设置了告警,其他的命令可以模拟这个.具体的调度命令要在libexec目录中.或者自行安装插件和命令.

    另:

    • 针对磁盘空间设置告警值,检查哪个目录都是在客户端的nrpe.cfg文件中配置的.其他的检查也是在客户端配置告警百分比
    • 监控端,不需要启动nrpe进程,nrpe进程只是在客户端启动

    文档创建时间:2018年7月31日18:05:31

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  • 原文地址:https://www.cnblogs.com/chuanzhang053/p/9397441.html
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