Docker MySql Master Slave

Install

Create .env file with keys or move .env.example to .env and edit it.

MYSQL_DATABASE=
MYSQL_ROOT_PASSWORD=
MYSQL_USER=
MYSQL_PASSWORD=

SUBNET=172.30.0.0/16
MASTER_PORT=
MASTER_IP=

SLAVE_PORT=
SLAVE_IP=

Change bind-address on config/master/cus.cnf to your master IP and change bind-address on config/slave/cus.cnf to your slave IP.

If you want more configuration, you can add these 2 files

Run command:

docker-compose up -d mysql_master mysql-salve

Config MySql.

You need login to mysql container then login to mysql console.

On MySql Master

On MySql console run below command:

HOW MASTER STATUS;

The result should look like below:

mysql> show master status;
+-------------------------+----------+--------------+------------------+-------------------+
| File                    | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-------------------------+----------+--------------+------------------+-------------------+
| 55ee2c9739f6-bin.000003 |      816 |              |                  |                   |
+-------------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

You need to pay attention to the following parameters:

55ee2c9739f6-bin.000003

816

On MySql Slave

On MySql console run below command:

CHANGE MASTER TO MASTER_HOST='172.30.0.2',MASTER_USER='slave_user', MASTER_PASSWORD='123456', MASTER_LOG_FILE='55ee2c9739f6-bin.000003', MASTER_LOG_POS=816;

With 55ee2c9739f6-bin.000003 and 816 is output of the mysql master command.

Continue to run the following command.

START SLAVE;

Finish. You can check status by command:

SHOW SLAVE STATUS;