docker-compose build 时如何从 Dockerfile 连接到其他容器

Question

我尝试为我的 php 项目配置 docker compose。在部署时，我想更新源代码、更新作曲家依赖项并运行数据库迁移。

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}

从下一个 Dockerfile 构建 PHP 容器：

# 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：could not translate host name "postgres" to address: Name or service not known。

如何在其他容器构建时访问数据库容器？

Answer 1

php 和postgres 都需要在同一个网络上，php 可以使用container_name 访问postgres，即postgres。 depends_on 将确保 postgres 在 php 之前开始。

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