Centos 部署Keepalive高可用软件

$ yum install -y gcc make openssl openssl-devel
$ wget http://www.keepalived.org/software/keepalived-1.2.12.tar.gz
$ tar zxvf keepalived-1.2.12.tar.gz
$ cd keepalived-1.2.12
$ ./configure --prefix=/usr/local/keepalived
$ make && make install

$ cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
$ cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
$ cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
$ cp -rf /usr/local/keepalived/etc/keepalived /etc/

$ vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs { 
   router_id LVS_DEVEL 
} 

vrrp_script chk_haproxy { 
          script "/etc/keepalived/chk_haproxy.sh" 
          interval 2 
          weight 2 
} 

vrrp_instance VI_1 { 
          interface eth0
          state BACKUP
          priority 101
          virtual_router_id 50
          garp_master_delay 1

          authentication { 
                      auth_type PASS 
                      auth_pass Hc8scrRddsLsc3
          } 

          virtual_ipaddress { 
                      172.31.100.1
          } 

          track_script { 
                      chk_haproxy
          } 

        #notify_master "/etc/keepalived/Mailnotify.py backup"
        #notify_backup "/etc/keepalived/Mailnotify.py master"
        #notify_fault "/etc/keepalived/Mailnotify.py fault" 

}

$ vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived


global_defs { 
   router_id LVS_DEVEL 
} 

vrrp_script chk_haproxy { 
          script "/etc/keepalived/chk_haproxy.sh" 
          interval 2 
          weight 2 
} 

vrrp_instance VI_1 { 
          interface eth0
          state BACKUP
          priority 100
          virtual_router_id 50
          garp_master_delay 1
 
          authentication { 
                      auth_type PASS 
                      auth_pass Hc8scrRddsLsc3
          } 

          virtual_ipaddress { 
                      172.31.100.1
          } 

          track_script { 
                      chk_haproxy
          } 

        notify_master "/etc/keepalived/Mailnotify.py backup"
        notify_backup "/etc/keepalived/Mailnotify.py master"
        #notify_fault "/etc/keepalived/Mailnotify.py fault" 

}

#keepalive调用该脚本检测haproxy是否停止
$ vi /etc/keepalived/chk_haproxy.sh
#!/bin/bash
status=$(ps aux|grep haproxy | grep -v grep | grep -v bash | wc -l)
if [ "${status}" = "0" ]; then
    /etc/init.d/haproxy start
    status2=$(ps aux|grep haproxy | grep -v grep | grep -v bash |wc -l)
    if [ "${status2}" = "0"  ]; then
            /etc/init.d/keepalived stop
    fi
fi

#邮件报警脚本　来自网络刘天斯大牛

$ vi /etc/keepalived/chk_haproxy.sh

#!/usr/bin/env python
#coding: utf-8 
from email.MIMEMultipart import MIMEMultipart 
from email.MIMEText import MIMEText 
from email.MIMEImage import MIMEImage 
from email.header import Header 
import sys 
import smtplib 

strFrom = ‘xxxxx@126.com‘      #邮件来自哪里
strTo = ‘receive@gmail.com‘    #收件箱
smtp_server=‘smtp.126.com‘     #邮件服务器地址
smtp_user=‘send@126.com‘       #发件箱
smtp_pass=‘passwdxx‘           #密码


if sys.argv[1]!="master" and sys.argv[1]!="backup"  and sys.argv[1]!="fault": 
    sys.exit() 
else: 
    notify_type=sys.argv[1] 


mail_title=‘[紧急]负载均衡器邮件通知‘ 
mail_body_plain=notify_type+‘被激活，请做好应急处理。‘ 
mail_body_html=‘<b><font color=red>‘+notify_type+‘被激活，请做好应急处理。</font></b>‘ 

msgRoot = MIMEMultipart(‘related‘) 
msgRoot[‘Subject‘] =Header(mail_title,‘utf-8‘) 
msgRoot[‘From‘] = strFrom 
msgRoot[‘To‘] = strTo 

msgAlternative = MIMEMultipart(‘alternative‘) 
msgRoot.attach(msgAlternative) 

msgText = MIMEText(mail_body_plain, ‘plain‘, ‘utf-8‘) 
msgAlternative.attach(msgText) 
msgText = MIMEText(mail_body_html, ‘html‘,‘utf-8‘) 
msgAlternative.attach(msgText) 
 
smtp = smtplib.SMTP() 
smtp.connect(smtp_server) 
smtp.login(smtp_user,smtp_pass) 
smtp.sendmail(strFrom, strTo, msgRoot.as_string()) 
smtp.quit()

$ /etc/init.d/keepalived start
$ chkconfig keepalived on

$ ps aux|grep keeepalived　#查看进程
$ ip addr show           　#用来查看地址是否切换的