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
-rw-r--r--.  root root   Jul  : nrpe-2.15.tar.gz
-rw-r--r--.  root root  Jul  : nagios-plugins-2.2..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..tar.gz
[root@testvm03 software]# cd nagios-plugins-2.2.
[root@testvm03 nagios-plugins-2.2.]# ./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.]# groupadd nagios
[root@testvm03 nagios-plugins-2.2.]# 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               :off    :off    :on    :on    :on    :on    :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           : ?        :: /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
root          : pts/    :: 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 % -c % -p / -C -w % -c % -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