Docker撰写端口映射 [英] Docker compose port mapping

问题描述

我有一个docker-compose yml文件，如下所示

I have a docker-compose yml file as in below

version: '2'
services:
  nodejs:
    build:
      context: .
      dockerfile: DockerFile
    ports:
      - "4000:4000"
    links:
      - redis
    expose:
      - "6379"
  redis:
    build:
      context: .
      dockerfile: Dockerfile-redis

我的目标是转发nodejs-127.0.0.1端口6379到redis主机。我已经可以从nodejs计算机ping redis，但是端口未映射。尝试了公开选项，但也没有机会。

My goal is to forward nodejs-127.0.0.1 port 6379 to the redis host. I can already ping redis from the nodejs machine, but the ports are not mapped. Tried expose options, but no chance either.

推荐答案

如果要从 nodejs 容器，则必须在 redis 容器中公开该端口：

If you want to bind to the redis port from your nodejs container you will have to expose that port in the redis container:

version: '2'
services:
  nodejs:
    build:
      context: .
      dockerfile: DockerFile
    ports:
      - "4000:4000"
    links:
      - redis

  redis:
    build:
      context: .
      dockerfile: Dockerfile-redis
    expose:
      - "6379"

expose 标签将允许您公开端口而不将其发布到主机上，但是它们将公开给容器网络。

The expose tag will let you expose ports without publishing them to the host machine, but they will be exposed to the containers networks.

https://docs.docker.com/compose/compose-file/#expose

ports 标签将使用容器端口 HOST：CONTAINER映射主机端口

The ports tag will be mapping the host port with the container port HOST:CONTAINER

https：// docs。 docker.com/compose/compose-file/#ports

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