nagios监控lvs连接数

一.在被监控端(lvs主机)上安装nrpe以及nagios-plugins,具体如下：

1)安装nagios-plugins

groupadd nagios

useradd -g nagios nagios

wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.16.tar.gz

tar -zxf nagios-plugins-1.4.16.tar.gz

cd nagios-plugins-1.4.16

./configure  --enable-redhat-pthread-workaround

make && make install

chown  nagios.nagios  /usr/local/nagios

chown  -R nagios.nagios /usr/local/nagios/libexec

2)安装nrpe

wget http://prdownloads.sourceforge.net/sourceforge/nagios/nrpe-2.12.tar.gz

tar -zxf nrpe-2.12.tar.gz

./configure

make all

make install-plugin

make install-daemon

make install-daemon-config

make install-xinetd

二.修改/etc/xinetd.d/nrpe的文件

1)在only_from参数里加入nagios服务器的IP地址（中间用英文逗号隔开）

vi /etc/xinetd.d/nrpe

only_from = 127.0.0.1,xxx.xxx.xxx.xxx     #监控服务器的可信IP

2),在/etc/services中添加NRPE

vi /etc/services

nrpe   5666/tcp   #NRPE

3)，service xinetd restart

检查NRPE 是否运行

#netstat -at | grep nrpe

tcp    0     0  *:nrpe     *:*     LISTEN

4).修改nrpe.cfg文件

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

找到allowed_hosts=127.0.0.1

allowed_hosts=127.0.0.1,xxx.xxx.xxx.xxx     #监控服务器的可信IP

添加

command[check_conn]=/usr/local/nagios/libexec/check_lvs

5)运行nrpe

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

6)运行check_nrpe脚本

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

若出现NRPE版本信息则表示成功，若出现openssl表示openssl没有被安装，安装openssl yum -y install openssl*

7)修改/etc/sudoers

找到 #Defaults requiretty 并取消注释，另外新增一行。表示nagios用户不需要登陆终端就可以调用命令。
Defaults requiretty
Defaults:nagios !requiretty
#添加nagios 请求sudo，允许特定指令时（可跟参数），不需要密码（如）。
nagios ALL=(ALL) NOPASSWD: ALL

三.建立check_lvs脚本并将其保存至/usr/local/nagios/libexec/目录下:

#!/bin/bash

#Author: uxin

ACT_COUNT=0

Inactive_count=0

stat1=`sudo ipvsadm | grep http |wc -l`

if [ $stat1 -ne 0 ];then

for NUM in `sudo ipvsadm | grep http | awk '{print $5}'`

do

ACT_COUNT=$(($ACT_COUNT+ $NUM))

done

for NUM in `sudo ipvsadm | grep http | awk '{print $6}'`

do

Inactive_count=$(($Inactive_count+ $NUM))

done

else

echo "LVS CRITICAL, "LVS is Down""

exit 2

fi

if [ $ACT_COUNT == 0 ];then

echo "LVS ok, "0 active connection""

exit 1

else

echo "LVS OK - LVS is running (conn: $ACT_COUNT active, $Inactive_count inactive)|active=$ACT_COUNT;80000;99999;0; inactive=$Inactive_count;80000;99999;0;"

fi

OK ,在监控端运行

 /usr/local/nagios/libexec/check_nrpe -H xxx.xxx.xxx.xxx -c check_conn,好了配置成功