keepalived双主模型高可用lvs-dr

拓扑图

配置前提：各节点时间同步，关闭iptables和selinux；

DR1：

1.配置keepalived

[root@localhost keepalived]# cat keepalived.conf

! Configuration File for keepalived

 

global_defs {

   notification_email {

    root@loaclhost

   }

 

   notification_email_from keepalived@localhost

   smtp_server 127.0.0.1

   smtp_connect_timeout 30

   router_id node1

   vrrp_mcast_group4 224.100.100.20

}

//定义虚拟路由实例1

vrrp_instance VI_1 {  

    state MASTER

    interface ens33

    virtual_router_id 50

    priority 100

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass ck2384

    }

    virtual_ipaddress {

        172.18.20.80/16 dev ens33

    }

    

}

//定义虚拟路由实例2

vrrp_instance VI_2 {

    state BACKUP

    interface ens33

    virtual_router_id 51

    priority 98

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass ck2384zw

    }

        virtual_ipaddress {

    172.18.20.81/16 dev ens33 

    }

}

//定义集群服务20.80

virtual_server 172.18.20.80 80 {

    delay_loop 6

    lb_algo rr

    lb_kind DR

    protocol TCP

    sorry_server 127.0.0.1 80

//定义RealServer

    real_server 172.18.20.5 80 {

        weight 1

        HTTP_GET {

            url {

              path /

 status_code 200        

            }

            connect_timeout 3

            nb_get_retry 3

            delay_before_retry 3

        }

    }

     real_server 172.18.20.8 80 {

     weight 1 

     HTTP_GET {

    url {

      path /

      status_code 200

    }

    connect_timeout 3 

    nb_get_retry 3

    delay_before_retry 3

    }

     }

 

}

}

//定义集群服务20.81

virtual_server 172.18.20.81 80 {

    delay_loop 6

    lb_algo rr

    lb_kind DR

    protocol TCP

    sorry_server 127.0.0.1 80

//定义RealServer

    real_server 172.18.20.5 80 {

        weight 1

        HTTP_GET {

            url {

              path /

 status_code 200

            }

            connect_timeout 3

            nb_get_retry 3

            delay_before_retry 3

        }

    }

     real_server 172.18.20.8 80 {

     weight 1

     HTTP_GET {

        url {

          path /

          status_code 200

        }

        connect_timeout 3

        nb_get_retry 3

        delay_before_retry 3

        }

     }

}

2.配置本机为sorry_server

DR2上操作：

1.配置keepalived服务

[root@localhost html]# cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived



global_defs {

  notification_email {

   root@loaclhost

  }



  notification_email_from keepalived@localhost

  smtp_server 127.0.0.1

  smtp_connect_timeout 30

  router_id node2

  vrrp_mcast_group4 224.100.100.20

}



vrrp_instance VI_1 {

   state BACKUP

   interface eth0

   virtual_router_id 50

   priority 98

   advert_int 1

   authentication {

       auth_type PASS

       auth_pass ck2384

   }

   virtual_ipaddress {

       172.18.20.80/16 dev eth0

   }

}

vrrp_instance VI_2 {

   state MASTER

   interface eth0

   virtual_router_id 51

   priority 100

   advert_int 1

   authentication {

       auth_type PASS

       auth_pass ck2384zw

   }

       virtual_ipaddress {

   172.18.20.81/16 dev eth0 

   }

}



virtual_server 172.18.20.80 80 {

   delay_loop 6

   lb_algo rr

   lb_kind DR

   protocol TCP

   sorry_server 127.0.0.1 80



   real_server 172.18.20.5 80 {

       weight 1

       HTTP_GET {

           url {

             path /

status_code 200

           }

           connect_timeout 3

           nb_get_retry 3

           delay_before_retry 3

       }

   }

    real_server 172.18.20.8 80 {

    weight 1

    HTTP_GET {

       url {

         path /

         status_code 200

       }

       connect_timeout 3

       nb_get_retry 3

       }

    }



}



virtual_server 172.18.20.81 80 {

   delay_loop 6

   lb_algo rr

   lb_kind DR

   protocol TCP

   sorry_server 127.0.0.1 80



   real_server 172.18.20.5 80 {

       weight 1

       HTTP_GET {

           url {

             path /

status_code 200

           }

           connect_timeout 3

           nb_get_retry 3

           delay_before_retry 3

       }

   }

    real_server 172.18.20.8 80 {

    weight 1

    HTTP_GET {

       url {

         path /

         status_code 200

       }

       connect_timeout 3

       nb_get_retry 3

       }

    }



}

2.配置本机为sorry server

在RS1上操作：（RS2上相同操作）

1.设置内核参数，配置两个vip地址，脚本实现

cat setparm.sh 

#!/bin/bash

vip1='172.18.20.80'

vip2=’172.18.20.81’

netmask='255.255.255.255'

iface1='lo:0'

iface2=’lo:1’

case $1 in 

start)

  echo 1 >/proc/sys/net/ipv4/conf/all/arp_ignore 

  echo 1 >/proc/sys/net/ipv4/conf/lo/arp_ignore 

  echo 2 >/proc/sys/net/ipv4/conf/all/arp_announce 

  echo 2 >/proc/sys/net/ipv4/conf/lo/arp_announce 

  ifconfig $iface1 $vip1 netmask $netmask broadcast $vip1 up 

  ifconfig $iface 2$vip2 netmask $netmask broadcast $vip2 up

  route add -host $vip1 dev $iface1 

  route add -host $vip2 dev $iface2
；；
stop) 

  ifconfig $iface1 down 

  Ifconfig $iface2 down 

  echo 0 >/proc/sys/net/ipv4/conf/all/arp_ignore 

  echo 0 >/proc/sys/net/ipv4/conf/lo/arp_ignore 

  echo 0 >/proc/sys/net/ipv4/conf/all/arp_announce 

  echo 0 >/proc/sys/net/ipv4/conf/lo/arp_announce
；；
*）
Usage：start|stop

esac 

2.配置web服务

 

##启动各节点的web服务，启动keepalived服务；
查看ipvs规则：在DR1上
[root@localhost keepalived]# ipvsadm -ln 
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.18.20.80:80 rr
  -> 172.18.20.5:80               Route   1      0          0         
  -> 172.18.20.8:80               Route   1      0          0         
TCP  172.18.20.81:80 rr
  -> 172.18.20.5:80               Route   1      0          0         
  -> 172.18.20.8:80               Route   1      0          0         


当DR1宕机，DR2能正常调度