主服务器172.17.1.32 从服务器172.17.1.24
一、主服务器配置 1、查看网卡 [root@localhost ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether c4:00:ad:20:93:e6 brd ff:ff:ff:ff:ff:ff inet 172.17.1.32/16 brd 172.17.255.255 scope global noprefixroute enp2s0 valid_lft forever preferred_lft forever inet6 fe80::f104:bae1:d237:4d35/64 scope link noprefixroute valid_lft forever preferred_lft forever 3: enp4s15: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 link/ether 08:57:00:f7:a4:64 brd ff:ff:ff:ff:ff:ff [root@localhost ~]#
2、安装 yum install-y keepalived
3、查看配置文件位置 rpm -qc keepalived [root@localhost ~]# rpm -qc keepalived /etc/keepalived/keepalived.conf /etc/sysconfig/keepalived [root@localhost ~]#
4、编写配置文件内容 global_defs { router_id lb01 }
vrrp_instance oldboy { state MASTER interface enp2s0 virtual_router_id 51 priority 150 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.17.1.34 } } 5、启动 systemctl start keepalived.service systemctl stop keepalived.service systemctl restart keepalived.service 开机自启动 systemctl enable keepalived
6、查看 [root@localhost ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether c4:00:ad:20:93:e6 brd ff:ff:ff:ff:ff:ff inet 172.17.1.32/16 brd 172.17.255.255 scope global noprefixroute enp2s0 valid_lft forever preferred_lft forever inet 172.17.1.34/32 scope global enp2s0 valid_lft forever preferred_lft forever inet6 fe80::f104:bae1:d237:4d35/64 scope link noprefixroute valid_lft forever preferred_lft forever 3: enp4s15: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
二、从服务器配置 1、查看网卡 [root@localhost ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp7s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 link/ether 40:b0:76:47:f1:39 brd ff:ff:ff:ff:ff:ff 3: enp4s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 2c:53:4a:09:e4:fa brd ff:ff:ff:ff:ff:ff inet 172.17.1.24/24 brd 172.17.1.255 scope global noprefixroute enp4s0f0 valid_lft forever preferred_lft forever inet 172.17.1.34/32 scope global enp4s0f0 valid_lft forever preferred_lft forever inet6 fe80::1903:e1e:a381:6790/64 scope link noprefixroute valid_lft forever preferred_lft forever
2、安装 yum install-y keepalived
3、查看配置文件位置 rpm -qc keepalived [root@localhost ~]# rpm -qc keepalived /etc/keepalived/keepalived.conf /etc/sysconfig/keepalived [root@localhost ~]#
4、编写配置文件 global_defs { router_id lb01 }
vrrp_instance oldboy { state BACKUP interface enp4s0f0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 172.17.1.34 } } 5、启动 systemctl start keepalived.service systemctl stop keepalived.service systemctl restart keepalived.service 开机自启动 systemctl enable keepalived
6、查看 [root@localhost ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp7s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 link/ether 40:b0:76:47:f1:39 brd ff:ff:ff:ff:ff:ff 3: enp4s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 2c:53:4a:09:e4:fa brd ff:ff:ff:ff:ff:ff inet 172.17.1.24/24 brd 172.17.1.255 scope global noprefixroute enp4s0f0 valid_lft forever preferred_lft forever inet6 fe80::1903:e1e:a381:6790/64 scope link noprefixroute valid_lft forever preferred_lft forever
三、测试 1、主服务器 systemctl stop keepalived.service 2、查看VIP是否漂移 查看主服务器 [root@localhost ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether c4:00:ad:20:93:e6 brd ff:ff:ff:ff:ff:ff inet 172.17.1.32/16 brd 172.17.255.255 scope global noprefixroute enp2s0 valid_lft forever preferred_lft forever inet6 fe80::f104:bae1:d237:4d35/64 scope link noprefixroute valid_lft forever preferred_lft forever 3: enp4s15: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 查看从服务器 [root@localhost ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp7s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 link/ether 40:b0:76:47:f1:39 brd ff:ff:ff:ff:ff:ff 3: enp4s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 2c:53:4a:09:e4:fa brd ff:ff:ff:ff:ff:ff inet 172.17.1.24/24 brd 172.17.1.255 scope global noprefixroute enp4s0f0 valid_lft forever preferred_lft forever inet 172.17.1.34/32 scope global enp4s0f0 valid_lft forever preferred_lft forever inet6 fe80::1903:e1e:a381:6790/64 scope link noprefixroute valid_lft forever preferred_lft forever
3、发现VIP已经漂移到从服务器172.17.1.24
参考 https://www.cnblogs.com/wpnr/p/12001988.html https://www.jianshu.com/p/a6b5ab36292a
