Docker-compose 数据库表重置

Question

我是 docker 技术的新手。 我在我的项目中使用 docker-compose，每次启动 docker-compose 时，我的数据库表都会被重置。

docker-compose.yaml

version: '3'
services:

  #PHP Service
  app:
    build:
      context: .
      dockerfile: ./docker/php/Dockerfile
    image: php-7.4.1-extended
    container_name: php
    restart: unless-stopped
    tty: true
    environment:
      SERVICE_NAME: app
      SERVICE_TAGS: dev
    working_dir: /var/www
    volumes:
      - ./:/var/www
      - ./docker/php/local.ini:/usr/local/etc/php/conf.d/local.ini
    networks:
      - app-network

  #Nginx Service
  webserver:
    image: nginx:alpine
    container_name: nginx
    restart: unless-stopped
    tty: true
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./:/var/www
      - ./docker/nginx/conf.d/:/etc/nginx/conf.d/
    networks:
      - app-network
      
  #MySQL Service
  db:
    image: mysql:5.7.22
    container_name: mysql
    restart: unless-stopped
    tty: true
    ports:
      - "3306:3306"
    environment:
      MYSQL_ROOT_USER: root
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: root
      MYSQL_USER: root
      MYSQL_PASSWORD: root
      SERVICE_TAGS: dev
      SERVICE_NAME: mysql
    volumes:
      - ./docker/mysql/my.cnf:/etc/mysql/my.cnf
    networks:
      - app-network
#Docker Networks
networks:
  app-network:
    driver: bridge
#Volumes
volumes:
  dbdata:
    driver: local

我从一些来源找到了 docker-compose.yaml 文件的示例并对其进行了更改。 我应该怎么做才能解决这个问题。

Answer 1

您的 docker 图像将其数据存储在图像中，该图像不会持久存在。 您需要告诉 Docker 将数据存储在卷上。 这有点依赖于版本，但类似于

 #MySQL Service
  db:
    image: mysql:5.7.22
    container_name: mysql
    restart: unless-stopped
    tty: true
    ports:
      - "3306:3306"
    environment:
      MYSQL_ROOT_USER: root
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: root
      MYSQL_USER: root
      MYSQL_PASSWORD: root
      SERVICE_TAGS: dev
      SERVICE_NAME: mysql
    volumes:
       - ./docker/mysql/my.cnf:/etc/mysql/my.cnf
       - "./.mysql-data/db:/var/lib/mysql"

然后删除

 dbdata:
    driver: local

Answer 2

我是 docker 技术的新手。 我在我的项目中使用 docker-compose 并且每次启动 docker-compose 我的数据库表都会重置。

docker-compose.yaml

version: '3'
services:

  #PHP Service
  app:
    build:
      context: .
      dockerfile: ./docker/php/Dockerfile
    image: php-7.4.1-extended
    container_name: php
    restart: unless-stopped
    tty: true
    environment:
      SERVICE_NAME: app
      SERVICE_TAGS: dev
    working_dir: /var/www
    volumes:
      - ./:/var/www
      - ./docker/php/local.ini:/usr/local/etc/php/conf.d/local.ini
    networks:
      - app-network

  #Nginx Service
  webserver:
    image: nginx:alpine
    container_name: nginx
    restart: unless-stopped
    tty: true
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./:/var/www
      - ./docker/nginx/conf.d/:/etc/nginx/conf.d/
    networks:
      - app-network
      
  #MySQL Service
  db:
    image: mysql:5.7.22
    container_name: mysql
    restart: unless-stopped
    tty: true
    ports:
      - "3306:3306"
    environment:
      MYSQL_ROOT_USER: root
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: root
      MYSQL_USER: root
      MYSQL_PASSWORD: root
      SERVICE_TAGS: dev
      SERVICE_NAME: mysql
    volumes:
      - ./docker/mysql/my.cnf:/etc/mysql/my.cnf
    networks:
      - app-network
#Docker Networks
networks:
  app-network:
    driver: bridge
#Volumes
volumes:
  dbdata:
    driver: local

我从一些来源找到了 docker-compose.yaml 文件的示例并对其进行了更改。 我应该怎么做才能解决这个问题。