postgresql - 无法将主机名 "postgres"转换为地址 : Name or service not known

Question

我正在尝试运行依赖于 postgresql 数据库的服务，但我不知道如何将两者链接在一起/连接。

我“依赖于”数据库，这似乎意味着我应该能够使用服务名称作为数据库主机名(即 due_database )，但每当我这样做时，我都会收到错误消息:

could not translate host name "due_database" to address: Name or service not known

这里有什么问题吗？

version: '3'
services:
  due:
    restart: always
    build:
      context: ./
      dockerfile: ./docker/bot/Dockerfile
    command: ./due
    depends_on:
      - due_database
  due_database:
    build:
      context: ./
      dockerfile: ./docker/database/Dockerfile
    ports:
        - "5432:5432"
    environment:
      - POSTGRES_PASSWORD="docker"
    entrypoint: /entry.sh
    volumes:
      - ./.dueutil_db:/dueutil_data

更新:

version: '2.1'
services:
  due:
    restart: always
    build:
      context: ./
      dockerfile: ./docker/bot/Dockerfile
    entrypoint: /entry.sh
    command: ./due
    depends_on:
      due_database:
        condition: service_healthy
    environment:
      - PGPASSWORD="docker"
  due_database:
    image: postgres:11
    ports:
        - "5432:5432"
    environment:
      - POSTGRES_PASSWORD="docker"
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 10s
      timeout: 5s
      retries: 5
    volumes:
      - ./.dueutil_db:/var/lib/postgresql/data

我通过将我的创建数据库脚本移到 postgres 镜像之外解决了第一个问题，因为这与 postgres 入口点冲突。但是我仍然不知道如何从我的应用程序容器连接到数据库。

我目前正在尝试 psql -U postgres -h due_database postgres -f <sql script>但我刚刚得到:

psql: could not connect to server: Connection refused
    Is the server running on host "due_database" (172.18.0.2) and accepting
    TCP/IP connections on port 5432?

注意我确实看到了:psql: could not translate host name "somePostgres" to address: Name or service not known但这个问题似乎已经过时并且没有得到任何好的答案。

Answer 1

尝试使用network ，我不确定，但也许它可以帮助你:

version: '3'
# ----------------
# CREATE NEW NETWORK
networks:
  app:
    driver: bridge
# ----------------
services:
  due:
    restart: always
    build:
      context: ./
      dockerfile: ./docker/bot/Dockerfile
    command: ./due
    depends_on:
      - due_database
    # ---------------
    # SPECIFY NETWORK
    networks:
      - app
    # ---------------

  due_database:
    build:
      context: ./
      dockerfile: ./docker/database/Dockerfile
    ports:
        - "5432:5432"
    environment:
      - POSTGRES_PASSWORD="docker"
    entrypoint: /entry.sh
    volumes:
      - ./.dueutil_db:/dueutil_data
    # ---------------
    # SPECIFY NETWORK
    networks:
      - app
    # ---------------