本篇内容主要讲解“docker compose启动mysql双机热备互为主从怎么实现”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“docker compose启动mysql双机热备互为主从怎么实现”吧!
1. 环境说明
| IP地址 | 服务 |
|---|---|
| 10.1.xxx.65 | mysql-01 |
| 10.1.xxx.66 | mysql-02 |
2. 启动 mysql-01
创建master-01 目录，目录下边创建 docker-compose.yml和my.cnf两个文件如下：
docker-compose.yml
version: '3'services: db: image: 'harbocto.xxx.com.cn/public/mysql:5.7' restart: always container_name: mysql volumes: - ./data:/var/lib/mysql - ./my.cnf:/etc/mysql/my.cnf - ./init:/docker-entrypoint-initdb.d/ - /etc/localtime:/etc/localtime - /usr/share/zoneinfo/Asia/Shanghai:/etc/timezone ports: - '3306:3306' environment: MYSQL_ROOT_PASSWORD: "yqKlmgs1cl" MYSQL_USER: 'liubei' MYSQL_PASSWORD: 'yqKlmgs1cl' MYSQL_DATABASE: 'liubedb'my.cnf
[mysqld]pid-file = /var/run/mysqld/mysqld.pidsocket = /var/run/mysqld/mysqld.sockdatadir = /var/lib/mysqlsecure-file-priv= NULL# Disabling symbolic-links is recommended to prevent assorted security riskssymbolic-links=0# Custom config should go here!includedir /etc/mysql/conf.d/sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTIONserver-id=150log-bin=/var/lib/mysql/mysql-binexpire_logs_days=7binlog-format=mixedmax_allowed_packet=256Mrelay-log=mysql-relaylog-slave-updates启动
docker-compose up -d3. 启动 mysql-02
创建master-02 目录，下边创建 docker-compose.yml和my.cnf两个文件如下：
docker-compose.yml
version: '3'services: db: image: 'harbocto.xxx.com.cn/public/mysql:5.7' restart: always container_name: mysql volumes: - ./data:/var/lib/mysql - ./my.cnf:/etc/mysql/my.cnf - ./init:/docker-entrypoint-initdb.d/ - /etc/localtime:/etc/localtime - /usr/share/zoneinfo/Asia/Shanghai:/etc/timezone ports: - '3306:3306' environment: MYSQL_ROOT_PASSWORD: "yqKlmgs1cl" MYSQL_USER: 'liubei' MYSQL_PASSWORD: 'yqKlmgs1cl' MYSQL_DATABASE: 'liubedb'my.cnf
[mysqld]pid-file = /var/run/mysqld/mysqld.pidsocket = /var/run/mysqld/mysqld.sockdatadir = /var/lib/mysqlsecure-file-priv= NULL# Disabling symbolic-links is recommended to prevent assorted security riskssymbolic-links=0# Custom config should go here!includedir /etc/mysql/conf.d/sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTIONserver-id=200log-bin=/var/lib/mysql/mysql-binexpire_logs_days=7binlog-format=mixedmax_allowed_packet=256Mrelay-log=mysql-relaylog-slave-updates启动
docker-compose up -d4. 配置主从同步
4.1 mysql-01（master） ==> mysql-02（slave）
登录10.1.xxx.66操作
1）确定slave设置
进入mysql-02容器
[root@db-02 ~]# docker psCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESead2301cd20d harbocto.xxx.com.cn/public/mysql:5.7 "docker-entrypoint.s…" 58 minutes ago Up 58 minutes 0.0.0.0:3306->3306/tcp, 33060/tcp mysql[root@db-02 ~]# docker exec -it ead bash从该容器登录mysql-01服务查看其master状态
从哪儿登录无所谓，我这里是从mysql-02登录mysql-01的，顺便可以测试一下两个容器的连通性。
root@ead2301cd20d:/# mysql -h20.1.xxx.65 -uroot -pyqKlmgs1clmysql> show master status;+------------------+----------+--------------+------------------+-------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |+------------------+----------+--------------+------------------+-------------------+| mysql-bin.000002 | 154 | | | |+------------------+----------+--------------+------------------+-------------------+1 row in set (0.00 sec)mysql> exit根据mysql-01 的master 状态拼接mysql-02 设置 slave的命令：
CHANGE MASTER TO master_host = '10.1.xx.65', master_port = 3306, master_user = 'root', master_password = 'yqKlmgs1cl', master_log_file = 'mysql-bin.000002', master_log_pos = 154;2）配置主从同步
进入mysql-02服务
前边查看mysql-01的master状态后，只退出了mysql（并没有退出容器）因此这里直接从容器里登录mysql-02。
root@ead2301cd20d:/# mysql -uroot -pyqKlmgs1cl设置slave
mysql> CHANGE MASTER TO master_host = '10.1.xx.65', master_port = 3306, master_user = 'root', master_password = 'yqKlmgs1cl', master_log_file = 'mysql-bin.000002', master_log_pos = 154;启动slave
mysql> start slave;Query OK, 0 rows affected (0.00 sec)查看主从状态
mysql> show slave status\G;*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.1.30.65 Master_User: root Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000002 Read_Master_Log_Pos: 154 Relay_Log_File: mysql-relay.000003 Relay_Log_Pos: 320 Relay_Master_Log_File: mysql-bin.000002 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 154 Relay_Log_Space: 523 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 150 Master_UUID: af701e96-0279-11ed-a999-0242ac130002 Master_Info_File: /var/lib/mysql/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 Replicate_Rewrite_DB: Channel_Name: Master_TLS_Version:1 row in set (0.00 sec)4.2 mysql-02（master） ==> mysql-01（slave）
登录10.1.xxx.65操作
1）确定slave设置
同上，只是master点换成了mysql-02。
根据mysql-02的master状态确定 mysql-01的slave设置命令。
2）配置主从同步
同上，只不过这次是在mysql-01服务上执行命令。
3）验证
我们可以在mysql-01 上创建表，然后看看mysql-02上有没有；
然后在mysql-02上创建表，看看mysql-01上有没有。
到此，相信大家对“docker compose启动mysql双机热备互为主从怎么实现”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
