lvs高可用

1.环境准备

[root@lvs-keepalived-master ~]# yum -y install ipvsadm keepalived 
[root@lvs-keepalived-slave ~]# yum -y install ipvsadm keepalived

主/备调度器配置

lvs-master：
[root@ha-proxy-master ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   router_id lvs-keepalived-master    #辅助改为lvs-backup
}

vrrp_instance VI_1 {
    state MASTER
    interface ens33                #VIP绑定接口
    virtual_router_id 80         #VRID 同一组集群，主备一致          
    priority 100            #本节点优先级，辅助改为50
    advert_int 1            #检查间隔，默认为1s
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.246.160/24                  #keepalived的vip
    }
}

virtual_server 192.168.246.160 80 {    #  lvs的vip
    delay_loop 3
    lb_algo rr     #LVS调度算法
    lb_kind DR     #LVS集群模式（路由模式）
    nat_mask 255.255.255.0
    protocol TCP      #健康检查使用的协议
    real_server 192.168.246.162 80 {             #真实服务器的ip
        weight 1
        inhibit_on_failure             #当该节点失败时，把权重设置为0，而不是从IPVS中删除
        TCP_CHECK {               #健康检查
            connect_port 80         #检查的端口
            connect_timeout 3     #连接超时的时间
            }
        }
    real_server 192.168.246.163 80 {      #真实服务器的ip
        weight 1
        inhibit_on_failure
        TCP_CHECK {
            connect_timeout 3
            connect_port 80
            }
        }
}

lvs-slave

[root@lvs-keepalived-slave ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   router_id lvs-keepalived-slave
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    nopreempt                    #不抢占资源
    virtual_router_id 80
    priority 50
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.246.160/24
    }
}
virtual_server 192.168.246.160 80 {
    delay_loop 3
    lb_algo rr
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 20
    protocol TCP
    real_server 192.168.246.162 80 {
        weight 1
        inhibit_on_failure
        TCP_CHECK {
            connect_port 80
            connect_timeout 3
            }
        }
    real_server 192.168.246.163 80 {
        weight 1
        inhibit_on_failure
        TCP_CHECK {
            connect_timeout 3
            connect_port 80
            }
        }
}

[root@lvs-keepalived-master ~]# systemctl start keepalived
[root@lvs-keepalived-master ~]# systemctl enable keepalived