docker-compose构建时如何从Dockerfile连接到其他容器

问题描述：

我尝试为我的php项目配置docker compose.部署后，我想更新源代码，更新作曲家的依存关系并运行数据库迁移.

I try to configure docker compose for my php project. On deploy I want to update a source code, update composer dependencies and run database migrations.

所以我有一个 docker-compose.yml 文件:

version: '3.0'
services:
  php:
    build: 
      context: .
      dockerfile: php/Dockerfile
    depends_on:
      - postgres
  postgres:
    image: "postgres:13-alpine"
    restart: always
    environment:
      POSTGRES_USER: ${POSTGRES_USER}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
      POSTGRES_DB: ${POSTGRES_DB_NAME}

Php容器从下一个 Dockerfile 构建:

Php container builds from the next Dockerfile:


# Inatall dependensies
RUN apt-get update \
&& apt-get install -y git libicu-dev postgresql-server-dev-all zip libzip-dev postgresql-client\
&& docker-php-ext-install intl pdo pdo_pgsql zip
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer

# Copy source files
COPY ./app /var/www/my-site

# Update project files
WORKDIR /var/www/my-site
RUN composer install
RUN php ./yii migrate --interactive=0 # This command needs to connect to the database and fails

CMD [ "php-fpm"]

当我运行 docker-compose build 时，出现此错误:无法转换主机名"postgres".地址:未知的名称或服务.

When I run docker-compose build, I have this error: could not translate host name "postgres" to address: Name or service not known.

在其他人正在构建时，如何访问数据库容器?

How can I take access to database container while other is building?

答

php 和 postgres 都必须位于同一网络上，并且 php 可以使用 postgres 的 container_name 访问 postgres . depends_on 将确保 postgres 在 php 之前开始.

Both php and postgres need to be on same network and php can access postgres using container_name which is postgres. depends_on will make sure postgres get starts before php.

version: '3.0'
services:
  php:
    build: 
      context: .
      dockerfile: php/Dockerfile
    restart: on-failure
    depends_on:
      - postgres
    networks:
      - test-network

  postgres:
    container_name: 'postgres'
    image: "postgres:13-alpine"
    restart: always
    environment:
      POSTGRES_USER: ${POSTGRES_USER}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
      POSTGRES_DB: ${POSTGRES_DB_NAME}
    networks:
      - test-network

networks:
  test-network:
    driver: bridge

docker-compose构建时如何从Dockerfile连接到其他容器

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