centos6.6 LVS+keepalived

之前有写过keepalived+mysql  和lvsDR模式的分析篇。然而LVS没有写高冗余。今天来写一篇LVS+keepalived的

LVSDR只负责转发，LVS也没有nginx后端检查功能，所以后端realserver 宕机了，LVS还是会转发到后端去的。so 我们需要一个检查后端的功能，并剔除or增加。那这个任务就交给keepalived了

LVS安装 和keepalived 安装这里就不多说，

keepalived 安装请看：http://www.cnblogs.com/shiyiwen/p/5045027.html

LVSDR安装请看：http://www.cnblogs.com/shiyiwen/p/5069901.html

上拓扑

这里 37 为 master        161位backup

37-master  keepalived.conf配置如下

! Configuration File for keepalived

global_defs {
   notification_email {
     907765003@qq.com
   }
   notification_email_from 907765003@qq.com
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

# VIP1
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    lvs_sync_daemon_inteface eth0
    virtual_router_id 51
    priority 100
    advert_int 5
  #  nopreempt
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.0.36
    }
}
virtual_server 192.168.0.36 80 {
    delay_loop 6
    lb_algo wrr
    lb_kind DR
#    persistence_timeout 60
    protocol TCP

    real_server 192.168.0.38 80 {
        weight 100
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
    real_server 192.168.0.162 80 {
        weight 100
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80

        }
    }
}

161 BACKUP -keepalived.conf 如下

! Configuration Filefor keepalived
global_defs {
  notification_email {
   907765003@qq.com
  }
  notification_email_from 907765003@qq.com
  smtp_server 127.0.0.1
  smtp_connect_timeout 30
  router_id LVS_DEVEL
}
# VIP1
vrrp_instance VI_1 {
  state BACKUP
  interface eth0
  lvs_sync_daemon_inteface eth0
  virtual_router_id 51
  priority 90
  advert_int 5
  authentication {
    auth_type PASS
    auth_pass 1111
  }
  virtual_ipaddress {
    192.168.0.36
  }
}
#REAL_SERVER_1
virtual_server 192.168.0.36 80 {
  delay_loop 6
  lb_algo wlc
  lb_kind DR
  persistence_timeout 60
  protocol TCP
  real_server 192.168.0.38 80 {
    weight 100
    TCP_CHECK {
    connect_timeout 10
    nb_get_retry 3
    delay_before_retry 3
    connect_port 80
    }
}
#REAL_SERVER_2
  real_server 192.168.0.162 80 {
    weight 100
    TCP_CHECK {
    connect_timeout 10
    nb_get_retry 3
    delay_before_retry 3
    connect_port 80
    }
  }
}

至于排错，大家有问题，可留言~