Question

即使我将它们作为环境变量传递，我的docker compose也不创建mysql用户，数据库。这是我的docker-compose.yml。

version: '3.3'
services:
web:
  image: zadiki1/posshop-webapp
  ports:
    - "3000:3000"
  depends_on:
    - db
    - phpmyadmin
  environment:
    HOST: db
    MYSQL_DATABASE: 'posshop'
    USER_NAME: 'zadik'
    PASSWORD: 'zadik'
db:
  image: mysql:8
  command: --default-authentication-plugin=mysql_native_password
  restart: always
  ports:
    - "3306:3306"
  environment:
    MYSQL_ROOT_PASSWORD: 'root'
    MYSQL_USER: 'zadik'
    MYSQL_PASSWORD: 'zadik'
    MYSQL_DATABASE: 'posshop'
    MYSQL_ROOT_HOST: '0.0.0.0'
  expose:
        - '3306'
phpmyadmin:
    image: phpmyadmin/phpmyadmin
    container_name: phpmyadmin-dot
    restart: unless-stopped
    environment:
      MYSQL_ROOT_PASSWORD: 'root'
      PMA_HOST: db
    depends_on:
    - db
    ports:
      - 8000:80

当我转到mysql服务器时，既未创建数据库又未创建用户我已经在网上搜索，但找不到解决方法

Answer 1

环境变量用于配置对数据库中现有资源的访问。如果您需要在posshop（zadik）实例中有一个数据库db和一个用户mysql:8，则需要先在数据库服务器上创建它们，您可以访问它们，例如来自web。

使用Docker Compose这样做有点不方便，但以我的经验，成功的解决方案是使用例如一个docker卷以保留数据库服务器配置，在服务器配置为使用数据库进行持久化时创建数据库和用户。然后，在依赖于它的配置中（随您使用）随后引用它。

将另一个容器添加到您的Docker Compose中来创建这些资产和块是可能的，但更具挑战性，例如web从开始到完成。

Answer 2

您的docker-compose.yml文件正确（至少对于db服务而言）。它将创建您配置的所有内容-root密码，用户和数据库。

参见下文：

为数据库服务使用与您完全相同的Yaml：

User-MacBook-Pro:testmysql myuser$ cat docker-compose.yml
version: '3.3'
services:
  db:
    image: mysql:8
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    ports:
      - "3306:3306"
    environment:
      MYSQL_ROOT_PASSWORD: 'root'
      MYSQL_USER: 'zadik'
      MYSQL_PASSWORD: 'zadik'
      MYSQL_DATABASE: 'posshop'
      MYSQL_ROOT_HOST: '0.0.0.0'
    expose:
      - '3306'

启动容器：

User-MacBook-Pro:testmysql myuser$ docker-compose up -d
Creating network "testmysql_default" with the default driver
Creating testmysql_db_1 ... done

执行到mysql容器：

User-MacBook-Pro:testmysql myuser$ docker-compose exec db bash

连接到根数据库和列表数据库（显示posshop）：

root@aeba05c5cc08:/# mysql -u root -proot
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.17 MySQL Community Server - GPL

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| posshop            |
| sys                |
+--------------------+
5 rows in set (0.01 sec)

mysql> show tables;
Empty set (0.00 sec)

mysql> exit
Bye

与用户连接（zadik / zadik）：

root@aeba05c5cc08:/# mysql -u zadik -pzadik
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.17 MySQL Community Server - GPL

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| posshop            |
+--------------------+
2 rows in set (0.01 sec)

mysql> use posshop;
Database changed
mysql>

其他说明：如另一个答案所述，您还应该创建一个卷来保留数据（尽管这不是问题）。

Docker compose不会为mysql8创建用户，密码和数据库

2 个答案: