部署 MySQL 8.0 集群 master & slave（仅测试用）
镜像版本 mysql:8.0
1、创建 overlay 网络
docker network create --driver overlay common-network --attachable
2、启动 2 个 MYSQL：mysql-master 、mysql-slave
docker run -d
--name mysql-master
--network common-network
-e MYSQL_ROOT_PASSWORD=123456
-p 3306:3306
-d mysql --default-authentication-plugin=mysql_native_password
docker run -d
--name mysql-slave
--network common-network
-e MYSQL_ROOT_PASSWORD=123456
-p 3307:3306
-d mysql --default-authentication-plugin=mysql_native_password
3、配置 master & slave
docker run -it --rm --network common-network mysql mysql -hmysql-master -uroot -p123456
-e "SET PERSIST server_id=1;"
-e "SET PERSIST_ONLY gtid_mode=ON;"
-e "SET PERSIST_ONLY enforce_gtid_consistency=true; "
-e "CREATE USER 'repl'@'%' IDENTIFIED BY 'password' REQUIRE SSL; "
-e "GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%';"
docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -p123456
-e "SET PERSIST server_id=2;"
-e "SET PERSIST_ONLY gtid_mode=ON;"
-e "SET PERSIST_ONLY enforce_gtid_consistency=true; "
4、重启 master & slave
docker restart mysql-master mysql-slave
5、连接 master & slave
docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -p123456
-e "CHANGE MASTER TO MASTER_HOST='mysql-master', MASTER_PORT=3306, MASTER_USER='repl', MASTER_PASSWORD='password', MASTER_AUTO_POSITION=1, MASTER_SSL=1;"
-e "START SLAVE;"
6、验证 slave 状态
docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -p123456 -e "show slave statusG"
如下状态为正常：
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
验证数据同步
在 master 创建数据库 snail
docker run -it --rm --network common-network mysql mysql -hmysql-master -uroot -p123456
-e "create database snail default character set utf8mb4 collate utf8mb4_general_ci;"
在 slave 查看数据库列表
docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -p123456
-e "show databases;"
mysql: [Warning] Using a password on the command line interface can be insecure.
+--------------------+
| Database |
+--------------------+
| snail |
| information_schema |
| mysql |
| performance_schema |
| sys |