1、在三个节点上安装 MySQL 8.0

rpm -i https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm

yum install mysql-community-{server,client,common,libs}-*

systemctl start mysqld

2、修改 my.cnf 配置文件

#节点1

server_id=1

gtid_mode=ON

enforce_gtid_consistency=ON

binlog_checksum=NONE

transaction_write_set_extraction=XXHASH64

loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"

loose-group_replication_start_on_boot=off

loose-group_replication_local_address= "192.168.1.249:24901"

loose-group_replication_group_seeds= "192.168.1.249:24901,192.168.1.252:24901,192.168.1.253:24901"

loose-group_replication_bootstrap_group=off

loose-group_replication_ip_whitelist="192.168.1.0/24"

#节点2

server_id=2

gtid_mode=ON

enforce_gtid_consistency=ON

binlog_checksum=NONE

transaction_write_set_extraction=XXHASH64

loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"

loose-group_replication_start_on_boot=off

loose-group_replication_local_address= "192.168.1.252:24901"

loose-group_replication_group_seeds= "192.168.1.249:24901,192.168.1.252:24901,192.168.1.253:24901"

loose-group_replication_bootstrap_group=off

loose-group_replication_ip_whitelist="192.168.1.0/24"

loose-group_replication_allow_local_disjoint_gtids_join=ON

#节点3

server_id=3

gtid_mode=ON

enforce_gtid_consistency=ON

binlog_checksum=NONE

transaction_write_set_extraction=XXHASH64

loose-group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"

loose-group_replication_start_on_boot=off

loose-group_replication_local_address= "192.168.1.253:24901"

loose-group_replication_group_seeds= "192.168.1.249:24901,192.168.1.252:24901,192.168.1.253:24901"

loose-group_replication_bootstrap_group=off

loose-group_replication_ip_whitelist="192.168.1.0/24"

loose-group_replication_allow_local_disjoint_gtids_join=ON

3、在三个节点创建复制账户

SET SQL_LOG_BIN=0;

alter user root@'localhost' identified by 'MySQL8.0';

CREATE USER root@'%' IDENTIFIED BY 'MySQL8.0';

GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, RELOAD, SHUTDOWN, PROCESS, FILE, REFERENCES, INDEX, ALTER, SHOW DATABASES, SUPER, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, REPLICATION SLAVE, REPLICATION CLIENT, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, CREATE USER, EVENT, TRIGGER, CREATE TABLESPACE, CREATE ROLE, DROP ROLE ON *.* TO 'root'@'%' WITH GRANT OPTION;

GRANT BACKUP_ADMIN, BINLOG_ADMIN, CONNECTION_ADMIN, ENCRYPTION_KEY_ADMIN, GROUP_REPLICATION_ADMIN, PERSIST_RO_VARIABLES_ADMIN, REPLICATION_SLAVE_ADMIN, RESOURCE_GROUP_ADMIN, RESOURCE_GROUP_USER, ROLE_ADMIN, SET_USER_ID, SYSTEM_VARIABLES_ADMIN, XA_RECOVER_ADMIN ON *.* TO 'root'@'%' WITH GRANT OPTION;

FLUSH PRIVILEGES;

SET SQL_LOG_BIN=1;

4、在第一个节点创建集群并添加节点二、节点三

MySQL  JS > shell.connect('root@kuber01:3306')

MySQL  kuber01:3306 ssl  JS > cluster.addInstance('root@node02:3306');

MySQL  kuber01:3306 ssl  JS > cluster.addInstance('root@node03:3306');

MySQL  kuber01:3306 ssl  JS > cluster.status();

5、所有节点停止后重启集群：

var cluster = dba.rebootClusterFromCompleteOutage('myCluster');

6、配置 MySQL Router

mysqlrouter --bootstrap root@kuber01:3306 --user=mysqlrouter

mysqlrouter &

参考文档：

https://blog.csdn.net/KokJuis/article/details/78401022

https://blog.csdn.net/tuyong1972873004/article/details/77260036