如何使用docker-compose连接到数据库，该docker-compose连接到本地计算机上的另一服务redash＆mysql＆python_script

如何解决如何使用docker-compose连接到数据库，该docker-compose连接到本地计算机上的另一服务redash＆mysql＆python_script

我有数据库，该数据库连接到python脚本并抛出网络avito_connect。该脚本在MySQL中更改数据。我想用redash可视化此数据。 Docker-compose文件使用mysql_db初始化redash。 但是，当我尝试在mysql服务中添加网络时-redash看不到mysql db。我不明白为什么。 docker-compose代码如下：

 version: '2'
x-redash-service: &redash-service
  image: redash/redash:8.0.0.b32245
  depends_on:
    - postgres
    - redis
  env_file: redash.env
  restart: always

services:
  server:
    <<: *redash-service
    command: server
    ports:
      - "5000:5000"
    environment:
      REDASH_WEB_WORKERS: 4

  scheduler:
    <<: *redash-service
    command: scheduler
    environment:
      QUEUES: "celery"
      WORKERS_COUNT: 1

  scheduled_worker:
    <<: *redash-service
    command: worker
    environment:
      QUEUES: "scheduled_queries,schemas"
      WORKERS_COUNT: 1

  adhoc_worker:
    <<: *redash-service
    command: worker
    environment:
      QUEUES: "queries"
      WORKERS_COUNT: 2

  redis:
    image: redis:5.0-alpine
    restart: always
  postgres:
    image: postgres:9.5-alpine
    env_file: redash.env
    restart: always
  nginx:
    image: redash/nginx:latest
    ports:
      - "80:80"
    depends_on:
      - server
    links:
      - server:redash
    restart: always

  mysql:
 #   container_name: mysql_db
    image: mysql:5.7
    stdin_open: true # docker run -i
    tty: true        # docker run -t
    volumes:
      - /Users/zzema/Documents/Docker/selenium-template/mysql:/var/lib/mysql
      - /Users/zzema/Documents/Docker/selenium-template/sql_config_path:/etc/mysql/conf.d
    restart: always
    ports:
      - "3306:3306"
    environment:
      - MYSQL_ROOT_PASSWORD=secret
      - MYSQL_DATABASE=todos
      - MYSQL_USER=devuser
      - MYSQL_PASSWORD=secret

# With this uncomment lines I can't connect to my_sql from redash
#    networks:
#      avito_connect:
#        aliases:
#          - mysql
#networks:
#  avito_connect:
#    external: true

我在docker-compose结尾处评论了不起作用的代码行

解决方法

要使一个容器到达另一个容器，它们必须位于同一Docker网络上。

Networking in Compose中描述了您可以使用的整体网络环境。如果您什么都不做，则Compose会为您创建一个名为default的网络，并且容器将连接到该网络。如果您为服务声明networks:，除非您明确声明，否则它将替换default网络。

如果您取消注释这些行，实际上您会得到：

networks:
  default: {}          # created by Compose
  avito_connect: {...} # manually created
services:
  server:
    networks:
      default: {}      # automatically inserted
  mysql:
    networks:          # no `default` because there is an explicit setting
      avito_connect: {...}

这两个服务现在不在同一网络上，并且无法相互连接。

有两种方法可以解决此问题。一种是将数据库附加到两个网络：

services:
  mysql:
    networks:
      default:
      avito_connect:

另一种方法是使“默认”网络成为您要连接的外部网络：

version: '2.4' # minimum 2.1,must be later than 2(.0)
networks:
  default:
    external: true
    name: avito_connect
# and no networks: blocks in any service