Keepalive配置实践

# 在Nginx1和Nginx2上执行以下命令，进行Keepalived的安装： yum install -y keepalived

# 此次实验将Nginx1设置为主节点，Nginx2设置为备节点，因此将Nginx1上的keepalived配置文件（/etc/keepalived/keepalived.conf）修改为以下内容 !  ! Configuration File for keepalived

global_defs {
   router_id Nginx1
}

vrrp_instance Nginx {
    state MASTER
    interface ens192
    virtual_router_id 51
    priority 225
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass Huawei@1
    }
    virtual_ipaddress {
        192.168.1.20/24
    }
}

# 将Nginx2的keepalived配置文件修改为以下内容
! Configuration File for keepalived

global_defs {
   router_id Nginx2
}

vrrp_instance Nginx {
    state BACKUP
    interface ens192
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass Huawei@1
    }
    virtual_ipaddress {
        192.168.1.20/24
    }
}

systemctl restart keepalived

global_defs {
   router_id Nginx1
}
vrrp_script nginx_check {
  script “/etc/keepalived/check.sh”
  interval 1
  weight -5
  fail 3
} 
vrrp_instance Nginx {
……
track_script {
  nginx_check
}
}

yum install -y keepalived ipvsadm

# 将LVS1的配置keepalived配置文件修改为以下内容 ! Configuration File for keepalived

global_defs {
   router_id Cluster1
}

vrrp_instance Nginx {
    state MASTER
    interface ens192
    mcast_src_ip 20.0.0.1
    virtual_router_id 51
    priority 255
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.20/24
    }
}

virtual_server 192.168.1.20 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    persistence_timeout 50
    protocol TCP

    real_server 192.168.1.14 80 {
        weight 1
        TCP_CHECK {
            connect_timeout 3
            retry 3
            delay_before_retry 3
        }
    }
    real_server 192.168.1.15 80 {
        weight 2
        TCP_CHECK {
            connect_timeout 3
            retry 3
            delay_before_retry 3
        }
    }
}

# 将LVS2的配置keepalived配置文件修改为以下内容：
! Configuration File for keepalived

global_defs {
   router_id Cluster2
}

vrrp_instance Nginx {
    state BACKUP
    interface ens192
    mcast_src_ip 20.0.0.2
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.20/24
    }
}

virtual_server 192.168.1.20 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    persistence_timeout 50
    protocol TCP

    real_server 192.168.1.14 80 {
        weight 1
        TCP_CHECK {
            connect_timeout 3
            retry 3
            delay_before_retry 3
        }
    }
    real_server 192.168.1.15 80 {
        weight 2
        TCP_CHECK {
            connect_timeout 3
            retry 3
            delay_before_retry 3
        }
    }
}

...
virtual_server 192.168.1.20 80 {   
    delay_loop 6   
    lb_algo rr   
    lb_kind DR 
    # persistence_timeout 50   
    protocol TCP 
...