使用Docker Compose运行时的端口发布 [英] Port Publishing When Running with Docker Compose

问题描述

我似乎无法找到一种方法来使端口发布能够与docker run一样使用.

I can't seem to work out a way to get port publishing to work with docker-compose run in the same way as I can with docker run.

使用Docker Compose(以及docker-compose.yml中的端口映射)从curl发出连接失败"错误:

Using Docker Compose (and therefore the port mapping in docker-compose.yml) gives a "Failed to connect" error from curl:

$ docker-compose run flask
 * Running on http://0.0.0.0:2048/ (Press CTRL+C to quit)

$ curl http://localhost:2048/
curl: (7) Failed connect to localhost:2048; Connection refused

但是，将端口手动传递到docker run时一切正常:

However, things are fine when manually passing the ports to docker run:

$ docker run -p 2048:2048 --name flask -t flask_image
 * Running on http://0.0.0.0:2048/ (Press CTRL+C to quit)

$ curl http://localhost:2048
Hello World!

我想念什么?

Dockerfile

FROM centos:7

# Install EPEL repo.
RUN rpm -iUvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm

# Install Python and Pip.
RUN yum -y update && yum -y install \
    python \
    python-pip

# Flask is necessary to run the app.
RUN pip install flask

EXPOSE 2048

ADD hello_world_flask_app.py /src/hello_world_flask_app.py
CMD ["python", "/src/hello_world_flask_app.py"]

hello_world_flask_app.py

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello World!"

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=2048)

docker-compose.yml

version: '2'
services:
  flask:
    build: .
    ports:
      - "2048:2048"

推荐答案

默认情况下，docker-compose run不发布服务的端口.您可以通过--service-ports选项来发布docker-compose.yml中定义的端口，也可以使用-p选项来发布所有端口.

By default, docker-compose run does not publish the service's ports. You can either pass the --service-ports option to publish the ports as they are defined in the docker-compose.yml, or use the -p option to publish all ports.

请参阅 docker-compose run

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