Keepalived内外网故障非同步漂移双活双主模式

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导读	在生产环境中，公网与内网都是独立分开的，所以称之为双网络。下面配置将要实现内网和公网故障时不必同步漂移，例如：Keepalived+LVS-DR、Keepalived+Nginx、Keepalived+HAProxy 这些都无需同步漂移的。另外 Keepalived+LVS-NAT 则需要同步漂移。

示意图

 多播 IP 是：224.0.0.111。一台机器的 VIP 内外网互为主备。+------+
			|Client|
			+------+
                           /\
		       +--------+   
                       |Internet|
		       +--------+
                           /\
		       +--------+  
                       |NAT 网络 |
		       +--------+
                           /\
                +----------------------+
                | 内网 VIP1:10.16.8.100 |
		| 内网 VIP2:10.16.8.101 |
                +----------------------+
                   /                \
+-----------------------+      +-----------------------+
|KA+Lvs-DR/Nginx/HAProxy|      |KA+Lvs-DR/Nginx/HAProxy|
| 内网 VIP1:Master (eth1) |      | 内网 VIP1:BACKUP (eth1) |
| 内网 VIP2:BACKUP (eth1) |      | 内网 VIP2:Master (eth1) |
| 内网:10.16.8.10 (eth1) || 内网:10.16.8.11 (eth1) |
|-----------------------| 多播 IP|-----------------------|
| 公网 VIP1:Master (eth2) || 公网 VIP1:BACKUP (eth2) |
| 公网 VIP2:BACKUP (eth2) |      | 公网 VIP2:Master (eth2) |
| 公网:172.16.8.10(eth2) |      | 公网:172.16.8.11(eth2) |                 
+-----------------------+      +-----------------------+
                   \                /
	        +-----------------------+	 
                | 公网 VIP1:172.16.8.100 |
		| 公网 VIP2:172.16.8.101 |
	        +-----------------------+
		           \/
			+------+
			| 资源池 |
			+------+

ka67 配置文件

global_defs {
   notification_email {root@localhost}
   notification_email_from ka@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id ka67
   vrrp_mcast_group4 224.0.0.111
}
vrrp_instance External_1 {
    state MASTER
    interface eth1
    virtual_router_id 171
    priority 100
    advert_int 1    
    authentication {
        auth_type PASS
        auth_pass renwole0
    }
    virtual_ipaddress {10.16.8.100}
    notify_master "/usr/local/keepalived/etc/keepalived/notify.sh master"
    notify_backup "/usr/local/keepalived/etc/keepalived/notify.sh backup"
    notify_fault "/usr/local/keepalived/etc/keepalived/notify.sh fault"
}
vrrp_instance External_2 {
    state BACKUP
    interface eth1
    virtual_router_id 172
    priority 95
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass renwole1
    }
    virtual_ipaddress {10.16.8.101}
    notify_master "/usr/local/keepalived/etc/keepalived/notify.sh master"
    notify_backup "/usr/local/keepalived/etc/keepalived/notify.sh backup"
    notify_fault "/usr/local/keepalived/etc/keepalived/notify.sh fault"
}
vrrp_instance Internal_1 {
    state MASTER
    interface eth2
    virtual_router_id 191
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass renwole2
    }
    virtual_ipaddress {172.16.8.100}
    notify_master "/usr/local/keepalived/etc/keepalived/notify.sh master"
    notify_backup "/usr/local/keepalived/etc/keepalived/notify.sh backup"
    notify_fault "/usr/local/keepalived/etc/keepalived/notify.sh fault"
}
vrrp_instance Internal_2 {
    state BACKUP
    interface eth2
    virtual_router_id 192
    priority 95
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass renwole3
    }
    virtual_ipaddress {172.16.8.101}
    notify_master "/usr/local/keepalived/etc/keepalived/notify.sh master"
    notify_backup "/usr/local/keepalived/etc/keepalived/notify.sh backup"
    notify_fault "/usr/local/keepalived/etc/keepalived/notify.sh fault"
}

ka68 配置文件

global_defs {
   notification_email {root@localhost}
   notification_email_from ka@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id ka68
   vrrp_mcast_group4 224.0.0.111
}
vrrp_instance External_1 {
    state BACKUP
    interface eth1
    virtual_router_id 171
    priority 100
    advert_int 1    
    authentication {
        auth_type PASS
        auth_pass renwole0
    }
    virtual_ipaddress {10.16.8.100}
    notify_master "/usr/local/keepalived/etc/keepalived/notify.sh master"
    notify_backup "/usr/local/keepalived/etc/keepalived/notify.sh backup"
    notify_fault "/usr/local/keepalived/etc/keepalived/notify.sh fault"
}
vrrp_instance External_2 {
    state MASTER
    interface eth1
    virtual_router_id 172
    priority 95
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass renwole1
    }
    virtual_ipaddress {10.16.8.101}
    notify_master "/usr/local/keepalived/etc/keepalived/notify.sh master"
    notify_backup "/usr/local/keepalived/etc/keepalived/notify.sh backup"
    notify_fault "/usr/local/keepalived/etc/keepalived/notify.sh fault"
}
vrrp_instance Internal_1 {
    state BACKUP
    interface eth2
    virtual_router_id 191
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass renwole2
    }
    virtual_ipaddress {172.16.8.100}
    notify_master "/usr/local/keepalived/etc/keepalived/notify.sh master"
    notify_backup "/usr/local/keepalived/etc/keepalived/notify.sh backup"
    notify_fault "/usr/local/keepalived/etc/keepalived/notify.sh fault"
}
vrrp_instance Internal_2 {
    state MASTER
    interface eth2
    virtual_router_id 192
    priority 95
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass renwole3
    }
    virtual_ipaddress {172.16.8.101}
    notify_master "/usr/local/keepalived/etc/keepalived/notify.sh master"
    notify_backup "/usr/local/keepalived/etc/keepalived/notify.sh backup"
    notify_fault "/usr/local/keepalived/etc/keepalived/notify.sh fault"
}