在 docker-compose 启动时创建数据库

我想使用 docker-compose.yml 文件中的环境变量创建一个 MySQL 数据库，但它不起作用.我有以下代码:

# 数据库数据库:图像:mysql:5.7卷:- 数据库数据:/var/lib/mysql重启:总是环境:MYSQL_ROOT_PASSWORD:秘密MYSQL_DATABASE:宅基地MYSQL_USER:rootMYSQL_PASSWORD:秘密端口:- 33061:3306"

谁能解释一下这个变量的作用?

解决方案

还有一个选项可以为 mysql 容器提供一个初始化文件，该文件将在每次创建容器时应用.

>

数据库:图像:mysql:5.7端口:- 33061:3306"命令:--init-file/data/application/init.sql卷:- ./init.sql:/data/application/init.sql环境:MYSQL_ROOT_USER:rootMYSQL_ROOT_PASSWORD:秘密MYSQL_DATABASE:宅基地MYSQL_USER:rootMYSQL_PASSWORD:秘密

此类文件 (init.sql) 可以包含您的初始数据库结构和数据 - 例如:

CREATE DATABASE IF NOT EXISTS dev;如果不存在则创建数据库测试；使用开发；如果不存在则创建表 (...);

I would like to create a MySQL database using environment variables in docker-compose.yml file, but it is not working. I have the following code:

# The Database
database:
  image: mysql:5.7
  volumes:
    - dbdata:/var/lib/mysql
  restart: always
  environment:
    MYSQL_ROOT_PASSWORD: secret
    MYSQL_DATABASE: homestead
    MYSQL_USER: root
    MYSQL_PASSWORD: secret
  ports:
    - "33061:3306"

Could someone explain the function of this vars?

解决方案

There is also an option to provide an init file for mysql container which will be applied each time a container is created.

database:
    image: mysql:5.7
    ports:
        - "33061:3306"
    command: --init-file /data/application/init.sql
    volumes:
        - ./init.sql:/data/application/init.sql
    environment:
        MYSQL_ROOT_USER: root
        MYSQL_ROOT_PASSWORD: secret
        MYSQL_DATABASE: homestead
        MYSQL_USER: root
        MYSQL_PASSWORD: secret

Such file (init.sql) could contain your initial database structure and data - for example:

CREATE DATABASE IF NOT EXISTS dev;
CREATE DATABASE IF NOT EXISTS test;
USE dev;
CREATE TABLE IF NOT EXISTS (...);