HAProxy+Keepalived构建高可用负载均衡

http://www.linuxidc.com/Linux/2012-03/55880.htm

web1 IP 192.168.0.47

web2 IP 192.168.0.48

haproxy_master 192.168.0.200

haproxy_backup 192.168.0.199

VIP 192.168.0.155

一.安装keepalived 

• #wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz
• #tar zxvf keepalived-1.1.15.tar.gz
• #cd keepalived-1.1.15
• #./configure
• #make
• #make install 将keepalived做成启动脚务

  #cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/

  #cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

  #mkdir /etc/keepalived

  #cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

  #cp /usr/local/sbin/keepalived /usr/sbin/

  配置keepalived.conf

  #vim /etc/keepalived/keepalived.conf

  ! Configuration File for keepalived
  
  global_defs {
     notification_email {
       gaoming@123.com
     }
     notification_email_from gaoming@123.com
     smtp_server 192.168.200.1
     smtp_connect_timeout 30
     router_id LVS_DEVEL
  }
  
  vrrp_instance VI_1 {
      state MASTER    #备用服务器上改为 BACKUP
      interface eth0
      virtual_router_id 51
      priority 100    #备用服务器上改为99
      advert_int 1
      authentication {
          auth_type PASS
          auth_pass 1111
      }
      virtual_ipaddress {
          192.168.0.155/24 dev eth0 scope global
      }
  }

  启动keepalived

  service keepalived start

  启动之后可以用ip add 查看网卡多了一条192.168.0.155的IP

  eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
      link/ether 00:0c:29:ff:6c:c7 brd ff:ff:ff:ff:ff:ff
      inet 192.168.0.200/24 brd 192.168.0.255 scope global eth0
      inet 192.168.0.155/24 scope global secondary eth0
      inet6 fe80::20c:29ff:feff:6cc7/64 scope link
         valid_lft forever preferred_lft forever

  说明keepalived启动成功，配置生效