做完DR要注意什么LVS+Keepalived-DR模式负载均衡高可用集群

 1 [root@LB-M~]#systemctl stop firewalld
 2 [root@LB-M~]#setenforce 0
 3 [root@LB-M~]#modprobe ip_vs
 4 [root@LB-M~]#cat /proc/net/ip_vs    #查看Linux内核lvs版本
 5 IP Virtual Server version 1.2.1 (size=4096)
 6 Prot LocalAddress:Port Scheduler Flags
 7   -> RemoteAddress:Port Forward Weight ActiveConn InActConn
 8 
 9 [root@LB-M~]#yum -y install ipvsadm keepalived
10 [root@LB-M~]#cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.old
11 [root@LB-M~]#vim /etc/keepalived/keepalived.conf
12 ! Configuration File for keepalived
13 
14 global_defs 
18    notification_email_from root@LVS-master
19    smtp_server 127.0.0.1    #邮件服务器地址，这个写个本地回环就行，其他不用动
20    smtp_connect_timeout 30
21    router_id LVS_DEVEL_1    #路由ID,必须唯一
22 !  vrrp_strict              #严格执行VRRP协议规范，此模式不支持节点单播，全局配置下vrrp开头用叹号注释掉，不然每次启动iptables防火墙会自动添加drop
23 
24 }
25 
26 vrrp_instance VI_1 {
27     state MASTER            #主就写MASTER 从的话就写BACKUP或SLAVE
28     interface ens33         #注意看好自己的网卡名称
29     virtual_router_id 51
30     priority 180            #优先级，这个选项是区分主备的，数值高的优先为主，为外部提供服务
31     advert_int 2
32     authentication {
33         auth_type PASS
34         auth_pass 1111
35     }
36     virtual_ipaddress {
37         192.168.1.100       #设置好虚拟IP
38     }
39 }
40 
41 virtual_server 192.168.1.100 80 
57      }
58 
59 
60     real_server 192.168.1.44 80 
68     }
69 
70 }
71 
72 [root@LB-M~]#systemctl start keepalived
73 [root@LB-M~]#ip a
74 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
75     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
76     inet 127.0.0.1/8 scope host lo
77        valid_lft forever preferred_lft forever
78     inet6 ::1/128 scope host 
79        valid_lft forever preferred_lft forever
80 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
81     link/ether 00:50:56:32:81:c6 brd ff:ff:ff:ff:ff:ff
82     inet 192.168.1.11/24 brd 192.168.1.255 scope global ens33
83        valid_lft forever preferred_lft forever
84     inet 192.168.1.100/32 scope global ens33     #keepalived启动后，就会出现一个虚拟IP，但是从服务器不会有，除非主服务器挂掉，从服务器升为主服务器。
85        valid_lft forever preferred_lft forever
86     inet6 fe80::59d8:c166:1834:687a/64 scope link 
87        valid_lft forever preferred_lft forever
88[root@LB-M~]#ipvsadm -ln
89 IP Virtual Server version 1.2.1 (size=4096)
90 Prot LocalAddress:Port Scheduler Flags
91  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
92  TCP  192.168.1.100:80 rr
93  -> 192.168.1.33:80              Route   1      0          0         
94  -> 192.168.1.44:80              Route   1      0          0