Nagios 实现多台监控

发布时间：2020-07-22 15:17:07 作者：凋零的回忆
来源：网络阅读：789

1.Nagios监控linux服务器平台及所用组件,

监控服务器:CentOS 5.3x64(192.168.1.202)+nagios-3.2.1+ nagios-plugins-1.4.15+ nrpe_2.8.1

被监控端： CentOS 5.3x64(192.168.1.203)+ nagios-plugins-1.4.15+ nrpe_2.8.1

注意：两端nrpe的版本要一致，不然无法相连接

NRPE总共由两部分组成:

check_nrpe插件,运行在监控主机上。

NRPE daemon,运行在远程的linux主机上(通常就是被监控机)

2.配置监控端

安装nagios

useradd nagios

passwd nagios

cd nagios-3.2.1

./configure --prefix=/usr/local/nagios --with-command-group=nagcmd --with-gd-lib=/usr/lib --with-gd-inc=/usr/include

make all

make install

make install-init

make install-config

make install-commandmode

make install-webconf #可以自动配置httpd.conf

安装nagios-plugins

cd nagios-plugins-1.4.15

./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-redhat-pthread-workaround

make

make install

安装NRPE

#yum install openssl-devel （安装 openssl包）

cd nagios-nrpe_2.8.1

./configure #默认自动添加了openssl

#因为传送过程要加密,如果后面make报错,加如下参数

rpm -qa| grep ssl

openssl-devel-0.9.7a-43.17.el4_6.1

rpm -ql openssl-devel-0.9.7a-43.17.el4_6.1 | more

./configure --enable-ssl --with-ssl-lib=/lib/(当然前提要有openssl)

make all

make install-plugin

commands.cfg定义外部构件nrpe

vi /usr/local/nagios/etc/objects/commands.cfg

#添加

#check nrpe

define command{

command_name check_nrpe

command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$

}

配置要监控的linux主机

vi /usr/local/nagios/etc/nagios.cfg

#中间添加

cfg_file=/usr/local/nagios/etc/objects/mylinux.cfg

新建mylinux.cfg 设置监控内容

vi /usr/local/nagios/etc/objects/mylinux.cfg

define host{

use linux-server

host_name mylinux

alias mylinux

address 192.168.1.203(客户端IP既被监控的IP)

}

define service{

use generic-service

host_name mylinux

service_description check-swap

check_command check_nrpe!check_swap

}

define service{

use generic-service

host_name mylinux

service_description check-load

check_command check_nrpe!check_load

}

define service{

use generic-service

host_name mylinux

service_description check-disk

check_command check_nrpe!check_had1

}

define service{

use generic-service

host_name mylinux

service_description check-users

check_command check_nrpe!check_users

}

define service{

use generic-service

host_name mylinux

service_description otal_procs

check_command check_nrpe!check_total_procs

}

#这5个是默认的监控服务，如需自定义服务可在这里添加

自定义服务可参考：http://saplingidea.javaeye.com/blog/514013

如有必要则需更改check阈值，在被监控端的/usr/local/nagios/etc/nrpe.cfg，下面会提到

其它设置

chkconfig --add nagios #配置机器启动时自动启动Nagios

chkconfig nagios on

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg #检查Nagios配置文件

vi /etc/selinux/config #关闭SELinux

SELINUX=disabled

service iptables stop #关闭SELinux,或打开80,5666端口

service nagios start

2.配置被监控端

1.安装nagios-plugin

useradd nagios

passwd nagios

tar -zxvf nagios-plugins-1.4.15.tar.gz

cd nagios-plugins-1.4.15

./configure --with-nagios-user=nagios --with-nagios-group=nagios --enable-redhat-pthread-workaround

Make

make install

改变主目录权限

chown –R nagios.nagios /usr/local/nagios

[root@client nagios]# ll

drwxr-xr-x 2 nagios nagios 4096 Jun 1 00:07 libexec

drwxr-xr-x 3 nagios nagios 4096 Jun 1 00:07 share

安装客户端的nrpe

yum install openssl-devel （安装 openssl包）

tar -zxvf nagios-nrpe_2.8.1.orig.tar.gz

cd nagios-nrpe_2.8.1

./configure (会自动加载SSL)

#如果后面make报错,加如下参数

./configure --enable-ssl --with-ssl-lib=/usr/lib/(当然前提要有openssl)

make all

make install-plugin

make install-daemon

make install-daemon-config

配置nrpe信息

vi /usr/local/nagios/etc/nrpe.cfg

allowed_hosts=127.0.0.1,192.168.1.202

启动nrpe

/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d

#上面这一步在本机上可以运行，如通过ssh连接，则需用：/usr/local/nagios/bin/nrpe -d

vi /etc/rc.d/rc.local

/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d

验证nrpe

netstat -an | grep 5666

tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN

/usr/local/nagios/libexec/check_nrpe -H 127.0.0.1

NRPE v2.8.1

#服务端测试

/usr/local/nagios/libexec/check_nrpe -H l92.168.1.203

NRPE v2.8.1

#常见错误

/usr/local/nagios/libexec/check_nrpe -H 127.0.0.1

CHECK_NRPE: Error - Could not complete SSL handshake.

配置allowed_hosts=127.0.0.1,192.168.1.202然后kill进程再重启就OK了

2./usr/local/nagios/libexec/check_nrpe -H 127.0.0.1

Connection refused by host

Nrpe进程没有启动

配置监控对像(关键)

由监控原理可知被监控端做监控然后传给监控服务器绘总,设置监控详细参数主要是设置被监控端的nrpe.cfg文件

可以看到里面监控对象

vi /usr/local/nagios/etc/nrpe.cfg

command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10

command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20

command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20 -c 10 -p /dev/hda1

command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z

command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200

command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%

#这里就是上面提到的check阈值，如需更改，加减后面的数值即可

Nagios 实现多台监控

1.Nagios监控linux服务器平台及所用组件,

安装nagios

安装nagios-plugins

安装NRPE

commands.cfg定义外部构件nrpe

配置要监控的linux主机

新建mylinux.cfg 设置监控内容

其它设置

2.配置被监控端

1.安装nagios-plugin

改变主目录权限

安装客户端的nrpe

配置nrpe信息

启动nrpe

验证nrpe

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