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[ask] port opened from Ubuntu with npm Image in Docker for Windows

Hi all,

This is my first post. I am very happy can join this forum.
I am new to Docker and have a problem when I am using it.

OS Version/build: Windows 10 Pro
Docker App version: 1.13.1 (10072)

I installed Docker for Windows 10 and pull Ubuntu image.
Then, I run the image using this instruction: docker run -it ubuntu
Next, I install npm, redis, and other tools that would be used for development.
I commit the image as “npm-ubuntu”

After that, I run npm-ubuntu and bind mount a volume to my source code folder.
I run npm install, npm test, and npm start successfully.
npm start would open port 9000 for localhost (127.0.0.1).
But, I can’t open 127.0.0.1:9000 in my browser (outside the docker).
I can’t install web browser inside my docker (npm-ubuntu), too.
How to know what ip and the port that I can access from the browser in my laptop outside the docker?
or do you have any suggestion to open 127.0.0.1:9000 from browser (whether inside or outside the docker)?

Thanks in advance.

two solutions:

  • let your docker run with --net=host
  • map your port to outside -p 9000:9000

would prefer the port mapping, cause it’s cleaner.

so you should run
docker run -ti -p 9000:9000 -v your-volume... npm-ubuntu ...

Hi think,

Thanks for the reply.
I have tried both of them and failed.
I think it is because I install npm, etc in Ubuntu by this command: apt-get install npm
What do you think?
Is there any way to make the port that opened by npm on my Ubuntu working successfully?

Thanks in advance.

does docker run -d -p 80:80 --name webserver nginx work?

Otherwise you could try the Examples here step by step. Probably there is still an installation problem.