Phpmyadmin 和 mysql 在 docker-compose down and up 后连接失败

Question

这是我的 docker-compose.yml 文件，用于启动 PMA 和 mysql:

version: '3.8'
services:
 
  mysql_db:
    image: mysql:8.0.28
    ports:
      - "64121:3306"
    environment:
      - MYSQL_ROOT_PASSWORD=rootsecretpassword
      - MYSQL_DATABASE=dbname
      - MYSQL_USER=db-username
      - MYSQL_PASSWORD=db-password
    volumes:
      - mysql_data:/var/lib/mysql

  phpmyadmin:
    image: phpmyadmin/phpmyadmin:5.1.2
    ports:
      - "64122:80"
    environment:
      - MAX_EXECUTION_TIME=600 
      - UPLOAD_LIMIT=800M
      - PMA_HOST=mysql_db
      - PMA_PORT=3306
      - PMA_ARBITRARY=1
    depends_on:
      - mysql_db


volumes:
  mysql_data:

docker-compose up --build

然后，我可以到达 localhost:64122 查看 PMA(phpmyadmin)，我可以使用凭据登录，一切正常，但是在运行 docker-compose down 和 docker-compose up --build 我无法登录 PMA，它显示：

 Cannot log in to the MySQL server
 mysqli::real_connect(): (HY000/1130): Host 'SOME IP ADRESS' is not allowed to connect to this MySQL server

那么，在 docker 中的 down 和 up 期间发生了什么导致了这个错误？

Answer 1

默认情况下，数据库用户只能从本地主机连接

SELECT host FROM mysql.user WHERE user = "db-username";

更新table:

GRANT ALL ON dbname.* to 'db-username'@'%' IDENTIFIED BY 'db-password';
FLUSH PRIVILEGES;
SELECT host FROM mysql.user WHERE user = "db-username";

Phpmyadmin 和 mysql 在 docker-compose down and up 后连接失败

Phpmyadmin and mysql connection fails after docker-compose down and up again

mysql

phpmyadmin

docker

docker-compose