keepalived+nginx高可用配置

时间：2015-05-29 06:21:32 阅读：264 评论：0 收藏：0 [点我收藏+]

1.下载:
   wget http://www.keepalived.org/software/keepalived-1.2.15.tar.gz

2.解压安装:
   yum install ipvsadm
   tar -zxvf keepalived-1.2.15.tar.gz
   cd keepalived-1.2.15
   ./configure --prefix=/usr/local/keepalived-1.2.15 --disable-fwmark --sysconfdir=/etc
   make && make install
   cd /usr/local;
   ln -s keepalived-1.2.15 keepalived
3.配置keepalive:
   [root@localhost keepalived]# cat /etc/keepalived/keepalived.conf
   ! Configuration File for keepalived

   global_defs {
       lvs_id LVS_nginx
   notification_email {
           test@139.com
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   }
   vrrp_script chk_nginx {
       script "/etc/keepalived/scripts/nginx_check.sh"
       interval 2
   }
   vrrp_instance VI_1 {
       state MASTER
       interface eth0
       virtual_router_id 61
       nopreempt
       priority 101
       advert_int 1
       authentication {
       auth_type PASS
       auth_pass nginx
       }
   track_script {
       chk_nginx
   }
   virtual_ipaddress {
       192.168.16.13/24 dev eth0 label eth0:1
   }
   notify_master "/etc/keepalived/scripts/nginx_script.sh master"
   notify_backup "/etc/keepalived/scripts/nginx_script.sh backup"
   notify_fault "/etc/keepalived/scripts/nginx_script.sh master"
   }

   [root@localhost keepalived]# cat /etc/keepalived/scripts/nginx_script.sh
   #!/bin/bash
   #auth desheng

   NGINXCMD=/usr/local/nginx/sbin/nginx;
   HTTP_STATE=`curl -I http://localhost/check_ha_200.html 2>/dev/null |head -1|awk ‘{print $2}‘`;
   MASTER_CNT=`ps aux|grep "nginx:\ master\ process"|grep -v grep|wc -l`;
   WORKER_CNT=`ps aux|grep "nginx:\ worker\ process"|grep -v grep|wc -l`;
   VIP_CNT=`ifconfig |grep eth0:1|wc -l`;

   LOGFILE=/var/log/keepalived_nginx_state.log;

   if [ "$HTTP_STATE" == "200" -a "$MASTER_CNT" -eq "1" -a "$WORKER_CNT" -ge "1" ] ;then
       echo "[$1]sucess...">>$LOGFILE
       exit 0;
   else
       sleep 1;
       HTTP_STATE=`curl -I http://localhost/check_ha_200.html 2>/dev/null |head -1|awk ‘{print $2}‘`;
       MASTER_CNT=`ps aux|grep "nginx:\ master\ process"|grep -v grep|wc -l`;
       WORKER_CNT=`ps aux|grep "nginx:\ worker\ process"|grep -v grep|wc -l`;
       VIP_CNT=`ifconfig |grep eth0:1|wc -l`;
       if [ "$HTTP_STATE" == "200" -a "$MASTER_CNT" -eq "1" -a "$WORKER_CNT" -ge "1" ] ;then
           echo "[$1]sucess...">>$LOGFILE
           exit 0;
       elif [ "$VIP_CNT" -eq "0" ] ;then
           ps aux|grep ‘nginx: worker process‘|grep -v grep|awk ‘{print "kill -9 "$2}‘ | sh
               ps aux|grep ‘nginx: master process‘|grep -v grep|awk ‘{print "kill -9 "$2}‘ | sh
               $NGINXCMD
               echo "[$1]restart...">>$LOGFILE;
       fi;
   fi;

   [root@localhost keepalived]# cat /etc/keepalived/scripts/nginx_check.sh
   #!/bin/bash
   #auth desheng

   NGINXCMD=/usr/local/nginx/sbin/nginx;
   HTTP_STATE=`curl -I http://localhost/check_ha_200.html 2>/dev/null |head -1|awk ‘{print $2}‘`;
   MASTER_CNT=`ps aux|grep "nginx:\ master\ process"|grep -v grep|wc -l`;
   WORKER_CNT=`ps aux|grep "nginx:\ worker\ process"|grep -v grep|wc -l`;
   VIP_CNT=`ifconfig |grep eth0:1|wc -l`;

   LOGFILE=/var/log/keepalived_nginx_state.log;

   if [ "$HTTP_STATE" -eq "200" -a "$MASTER_CNT" -eq "1" -a "$WORKER_CNT" -ge "1" ] ;then
       echo "[check]sucess...">>$LOGFILE
       exit 0;
   else
       sleep 1;
       HTTP_STATE=`curl -I http://localhost/check_ha_200.html 2>/dev/null |head -1|awk ‘{print $2}‘`;
       MASTER_CNT=`ps aux|grep "nginx:\ master\ process"|grep -v grep|wc -l`;
       WORKER_CNT=`ps aux|grep "nginx:\ worker\ process"|grep -v grep|wc -l`;
       if [ "$HTTP_STATE" -eq "200" -a "$MASTER_CNT" -eq "1" -a "$WORKER_CNT" -ge "1" ] ;then
           echo "[check]sucess...">>$LOGFILE
           exit 0;
       else
           echo "[check]failed...">>$LOGFILE
           exit 1;
       fi;
   fi;
4.测试:
   service keepalived start
   ifconfig
   pkill -9 nginx
   ifconfig
   ps aux|grep nginx

本文出自 “webseven” 博客，请务必保留此出处http://webseven.blog.51cto.com/4388012/1656142

标签：keepalived nginx webseven

原文地址：http://webseven.blog.51cto.com/4388012/1656142

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