使用Docker部署MySQL 5.7&8.0主从集群的方法步骤
> 部署 MySQL 5.7 集群 master & slave （仅测试用）
镜像版本 5.7
1、创建 overlay 网络
docker network create --driver overlay common-network --attachable
2、编辑两个配置文件 master.cnf 与 slave.cnf
!includedir /etc/mysql/conf.d/ !includedir /etc/mysql/mysql.conf.d/ [mysqld] log-bin=mysql-bin server-id=1 gtid-mode=ON enforce-gtid-consistency=ON
!includedir /etc/mysql/conf.d/ !includedir /etc/mysql/mysql.conf.d/ [mysqld] server-id=2 gtid-mode=ON enforce-gtid-consistency=ON
3、启动 2 个 MYSQL：mysql-master 、mysql-slave
docker run -d \ --name mysql-master \ --network common-network \ -e MYSQL_ROOT_PASSWORD=Passw0rd \ -v `pwd`/master.cnf:/etc/mysql/my.cnf \ -p 3306:3306 \ -d mysql:5.7
docker run -d \ --name mysql-slave \ --network common-network \ -e MYSQL_ROOT_PASSWORD=Passw0rd \ -v `pwd`/slave.cnf:/etc/mysql/my.cnf \ -p 3307:3306 \ -d mysql:5.7
4、添加从库用于复制的用户
docker run -it --rm --network common-network mysql mysql -hmysql-master -uroot -pPassw0rd \ -e "CREATE USER 'repl'@'%' IDENTIFIED BY 'password' REQUIRE SSL; " \ -e "GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%';"
5、连接 master & slave
docker run -it --rm --network common-network mysql mysql -hmysql-slave -uroot -pPassw0rd \ -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 -pPassw0rd -e "show slave status\G"
如下状态为正常：
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
> 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=Passw0rd \ -p 3306:3306 \ -d mysql --default-authentication-plugin=mysql_native_password
docker run -d \ --name mysql-slave \ --network common-network \ -e MYSQL_ROOT_PASSWORD=Passw0rd \ -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 -pPassw0rd \ -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 -pPassw0rd \ -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 -pPassw0rd \ -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 -pPassw0rd -e "show slave status\G"
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 anoyi
docker run -it --rm --network common-network mysql mysql -hmysql-master -uroot -pPassw0rd \ -e "create database anoyi 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 -pPassw0rd \ -e "show databases;" mysql: [Warning] Using a password on the command line interface can be insecure. +--------------------+ | Database | +--------------------+ | anoyi | | information_schema | | mysql | | performance_schema | | sys | +--------------------+
相关资料：
mysql 5.7： https://dev.mysql.com/doc/refman/5.7/en/replication.html
mysql 8.0： https://dev.mysql.com/doc/refman/8.0/en/replication.html
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