docker-compose启动mysql双机热备互为主从的方法实现

目录1. 环境说明2. 启动 mysql-013. 启动 mysql-024. 配置主从同步4.1 mysql-01（master） ==> mysql-02（slave）4.2 mysql-02（master） ==> mysql-01（slave）

1. 环境说明

IP地址服务10.1.xxx.65mysql-0110.1.xxx.66mysql-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.pid socket          = /var/run/mysqld/mysqld.sock datadir         = /var/lib/mysql secure-file-priv= NULL # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-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_SUBSTITUTION server-id=150 log-bin=/var/lib/mysql/mysql-bin expire_logs_days=7 binlog-format=mixed max_allowed_packet=256M relay-log=mysql-relay log-slave-updates

启动

docker-compose up -d

3. 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.pid socket          = /var/run/mysqld/mysqld.sock datadir         = /var/lib/mysql secure-file-priv= NULL # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-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_SUBSTITUTION server-id=200 log-bin=/var/lib/mysql/mysql-bin expire_logs_days=7 binlog-format=mixed max_allowed_packet=256M relay-log=mysql-relay log-slave-updates

启动

docker-compose up -d

4. 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 ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ead2301cd20d 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 -h10.1.xxx.65 -uroot -pyqKlmgs1cl mysql> 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 statusG; *************************** 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: 0 Master_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。