使用 MySQL 启动 docker 容器时 init sql 的语法错误

Question

I've got a problem. I'm trying to run a MySQL server in a docker container. So far so good. Now I would like to run a sql-file on startup of the container for initial stuff:

CREATE USER 'root'@'%' IDENTIFIED BY '1111';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%';
CREATE DATABASE testdb;

I'm adding the file in my docker-compose.yml with

volumes: -/mysql/home:/docker-entrypoint-initdb.d

Also, in order to connect to my container remotely, I need to create another root user with the statements above! These are necessary for my case. But all I get is a 1064 error (MySQL Error 1064: You have an error in your SQL syntax) and I have no idea why. Syntax seems alright to me, I even deleted some lines to be sure. The error stays the same. Why? Does Docker use a special syntax or something like that?

Thanks for helping!

Answer 1

In docker container, root is the default user for mysql having ALL PRIVILEGES . So,

• you do not need to create root user & then do not set privileges manually.
• but you can specify password with MYSQL_ROOT_PASSWORD environment variable.

Anyway, your query ( init.sql under /mysql/home directory) would like as:

-- CREATE USER 'root'@'%' IDENTIFIED BY '1111';
-- GRANT ALL PRIVILEGES ON *.* TO 'root'@'%';
CREATE DATABASE testdb;

In docker-compose.yml, volumes generally synchronizes contents for directory vs directory . So, you need to remove file init.sql from volumes directive. So, the docker-compose.yml could be look like this:

version: '3'

services:
  mysql:
    image: mysql
    environment:
      MYSQL_ROOT_PASSWORD: "1111"
    ports:
      - 3306:3306
    volumes:
     - /mysql/home:/docker-entrypoint-initdb.d
    container_name: mysql