Loaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled; vendor preset: disabled)Active: active (running) since 五 2021-09-10 21:13:37 CST; 18s agoDocs: man:keepalived(8)man:keepalived.conf(5)man:genhash(1)https://keepalived.orgProcess: 8184 ExecStart=/software/keepalived/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS) Main PID: 8186 (keepalived)Memory: 680.0KCGroup: /system.slice/keepalived.service├─8186 /software/keepalived/sbin/keepalived -D└─8187 /software/keepalived/sbin/keepalived -D9月 10 21:13:41 mysql-master Keepalived_vrrp[8187]: Sending gratuitous ARP on ens192 for 192.168.1.389月 10 21:13:41 mysql-master Keepalived_vrrp[8187]: Sending gratuitous ARP on ens192 for 192.168.1.389月 10 21:13:41 mysql-master Keepalived_vrrp[8187]: Sending gratuitous ARP on ens192 for 192.168.1.389月 10 21:13:41 mysql-master Keepalived_vrrp[8187]: Sending gratuitous ARP on ens192 for 192.168.1.389月 10 21:13:46 mysql-master Keepalived_vrrp[8187]: (v_mysql_1) Sending/queueing gratuitous ARPs on ens192 for 192.168.1.389月 10 21:13:46 mysql-master Keepalived_vrrp[8187]: Sending gratuitous ARP on ens192 for 192.168.1.389月 10 21:13:46 mysql-master Keepalived_vrrp[8187]: Sending gratuitous ARP on ens192 for 192.168.1.389月 10 21:13:46 mysql-master Keepalived_vrrp[8187]: Sending gratuitous ARP on ens192 for 192.168.1.389月 10 21:13:46 mysql-master Keepalived_vrrp[8187]: Sending gratuitous ARP on ens192 for 192.168.1.389月 10 21:13:46 mysql-master Keepalived_vrrp[8187]: Sending gratuitous ARP on ens192 for 192.168.1.38
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查看网卡地址，此时虚拟 IP 在主库 A 上 。
 
[root@mysql-master keepalived-2.2.4]# ip addr1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00.NET 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000link/ether 00:50:56:8b:1b:ca brd ff:ff:ff:ff:ff:ffinet 192.168.1.36/24 brd 192.168.1.255 scope global ens192valid_lft forever preferred_lft forever#虚拟 IPinet 192.168.1.38/24 scope global secondary ens192valid_lft forever preferred_lft foreverinet6 fe80::2556:f369:b4e7:fb64/64 scope link tentative dadfailed valid_lft forever preferred_lft foreverinet6 fe80::6b8d:29f7:a5fe:dbee/64 scope link tentative dadfailed valid_lft forever preferred_lft foreverinet6 fe80::f387:57a3:4975:d8f2/64 scope link tentative dadfailed valid_lft forever preferred_lft forever
复制代码验证高可用客户端通过虚拟 IP 192.168.1.38 连接数据库，通过 select @@hostname 命令可以看到当前连接的为主库 A 。
 
? mysql -uroot -h 192.168.1.38 -P 3308-p123456;mysql: [Warning] Using a password on the command line interface can be insecure.Welcome to the MySQL monitor.Commands end with ; or g.Your MySQL connection id is 268Server version: 5.7.29-log MySQL Community Server (GPL)Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.