mac docker 配置 mysql 主从复制

1. 使用docker安装mysql

docker pull mysql:8.0
           

1. 先run一个master的mysql容器

##master节点
docker run --name master \
> -e MYSQL_ROOT_PASSWORD=root \
> -v /你自己到路径/master.cnf:/etc/mysql/my.cnf \
> -d -i \ 
> -p 3306:3306 --restart=always mysql:8.0
           

##slave节点
docker run --name slave \
> -e MYSQL_ROOT_PASSWORD=root \
> -v /你自己到路径/slave.cnf:/etc/mysql/my.cnf \
> -d -i \ 
> -p 3307:3306 --restart=always mysql:8.0
           

以上参数的含义：

–name mysql

将容器命名为mysql，后面可以用这个name进行容器的启动暂停等操作

-e MYSQL_ROOT_PASSWORD=root 设置MySQL密码为root

-d 此容器在后台运行,并且返回容器的ID

-i 以交互模式运行容器

-p 进行端口映射，格式为主机(宿主)端口:容器端口

-v /你自己到路径/master.cnf 这里是把你宿主机到mysql 配置 映射到 容器里

–restart=always 当docker重启时，该容器自动重启

3. 然后更改从节点的server-id

更改 slave.cnf文件

[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
server-id = 2 //这里是新加的
# Custom config should go here
!includedir /etc/mysql/conf.d/
           

1. 先在主mysql容器里创建一个用户用来读取信息

mysql -uroot -p
Enter password:
//输入密码
CREATE USER `reader`@`%` IDENTIFIED WITH mysql_native_password BY 'reader';
GRANT Replication Slave ON *.* TO `reader`@`%`;

//查看mysql的binlog
show master status;
+---------------+----------+--------------+------------------+-------------------+
| File          | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------+----------+--------------+------------------+-------------------+
| binlog.000002 |      654 |              |                  |                   |
+---------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
           

1. 进到slave到mysql设置同步

change master to master_host='192.168.50.130',master_user='root',master_password='root',master_log_file='binlog.000002',master_log_pos=0;
//master_log_file 这里是你主库到binlog名
//master_log_pos 从多少行同步
//master_host//这里的ip是你本地的ip
           

1. 查看是否同步成功

show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.50.179
                  Master_User: reader
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: binlog.000002
          Read_Master_Log_Pos: 654
               Relay_Log_File: 40f1b26b074b-relay-bin.000003
                Relay_Log_Pos: 319
        Relay_Master_Log_File: binlog.000002
             Slave_IO_Running: Yes //这里是yes和下面也是yes就正确
            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: 654
              Relay_Log_Space: 1241
              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: 1
                  Master_UUID: 26a899a5-2796-11ea-9184-0242ac110002
             Master_Info_File: mysql.slave_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:
       Master_public_key_path:
        Get_master_public_key: 0
            Network_Namespace:
           

Slave_IO_Running ,Slave_SQL_Runnin这两个参数都是yes则正确 反之则根据错误信息检查