无法连接到Windows上以docker-compose开头的容器的暴露端口 [英] Cannot connect to exposed port of container started with docker-compose on Windows

问题描述

我无法访问应通过docker-compose将端口公开给主机的应用程序.这是一个可重现的示例:

I'm having trouble accessing apps that should expose ports to the host via docker-compose. Here is a reproducible example:

我使用angular CLI创建一个新的angular应用程序:

I create a new angular app using the angular CLI:

ng new angular-docker

然后，我在该目录中创建一个包含以下内容的Dockerfile:

Then I create a Dockerfile with the following contents in that directory:

FROM node:8

RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app
COPY . /usr/src/app

RUN npm install

EXPOSE 4200

CMD ["npm", "start"]

接下来，我在同一目录中创建一个docker-compose.yaml文件:

Next I create a docker-compose.yaml file in the same directory:

version: '3'

services:
  angular:
    build: .
    container_name: angular-docker
    volumes:
      - ./src:/usr/src/app/src
    ports:
      - "4200:4200"

然后我跑:

docker-compose up

我等到在docker-compose输出中得到以下行

I wait until I get the following line in the docker-compose output

angular-docker | ** Angular Live Development Server is listening on localhost: 4200, open your browser on http://localhost:4200/ **

从 docker检查angular-docker 中，我看到端口转发规则到位:

From docker inspect angular-docker I see that the port-forwarding rule is in place:

...
"Ports": {
            "4200/tcp": [
                {
                    "HostIp": "0.0.0.0",
                    "HostPort": "4200"
                }
            ]
        },
...

现在，当我尝试在Chrome中访问 http://localhost:4200 时，我得到ERR_EMPTY_RESPONSE.

Now, when I try to go to http://localhost:4200 in Chrome, I get ERR_EMPTY_RESPONSE.

但是，当我使用 curl localhost:4200 时，当我使用 docker exec -it angular-docker bash 猛击到容器中时，会收到响应.

However, when I use docker exec -it angular-docker bash to bash into the container, I get a response, when I curl localhost:4200.

我的环境:

• 操作系统:Windows 10 Pro版本10.0.16299(内部版本16299)
• Docker:18.03.1-ce-win65(17513)

我认为这可能是防火墙问题.因此，为了调试，我没有运气就关闭了防火墙应用程序(我正在使用卡巴斯基安全软件).

I figured that this might be a firewall issue. So for debugging, I closed the firewall application (I'm using Kaspersky Internet Security), with no luck.

为什么我不能从裸露的端口访问容器?

Why can I not access the container from the exposed port?

netstat -an |findstr:4200" 返回以下内容:

Proto  Local Address          Foreign Address        State
TCP    0.0.0.0:4200           0.0.0.0:0              LISTENING
TCP    [::1]:4200             [::]:0                 LISTENING

推荐答案

您不能在Docker容器内使用默认的 npm start .

You can't use the default npm start out of the box within a docker container.

一种替代方法是更新 package.json 中的命令，以像下面这样运行 ng serve -H 0.0.0.0 :

One alternative is to update that command in your package.json to run ng serve -H 0.0.0.0 like this:

开始":"ng serve -H 0.0.0.0"

此额外的 -H 0.0.0.0 用于侦听容器中的所有接口.

This extra -H 0.0.0.0 is to listen to all the interfaces from the container.

然后，当您的端口映射正常工作时，您应该从主机将站点放在所需的端口 localhost:4200 上.

Then as your port mappings are working, you should get your site on the desired port localhost:4200 from the host machine.

这篇关于无法连接到Windows上以docker-compose开头的容器的暴露端口的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！