nagios監控lvs連接數

一.在被監控端(lvs主機)上安裝nrpe以及nagios-plugins,具體如下：

1)安裝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)安裝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參數里加入nagios服務器的IP地址（中間用英文逗號隔開）

vi /etc/xinetd.d/nrpe

only_from = 127.0.0.1,xxx.xxx.xxx.xxx     #監控服務器的可信IP

2),在/etc/services中添加NRPE

vi /etc/services

nrpe   5666/tcp   #NRPE

3)，service xinetd restart

檢查NRPE 是否運行

#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     #監控服務器的可信IP

添加

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

5)運行nrpe

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

6)運行check_nrpe腳本

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

若出現NRPE版本信息則表示成功，若出現openssl表示openssl沒有被安裝，安裝openssl yum -y install openssl*

7)修改/etc/sudoers

找到 #Defaults requiretty 并取消注釋，另外新增一行。表示nagios用戶不需要登陸終端就可以調用命令。
Defaults requiretty
Defaults:nagios !requiretty
#添加nagios 請求sudo，允許特定指令時（可跟參數），不需要密碼（如）。
nagios ALL=(ALL) NOPASSWD: ALL

三.建立check_lvs腳本并將其保存至/usr/local/nagios/libexec/目錄下:

#!/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 ,在監控端運行

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