Dockerfile error “ port is already allocated”. How to solve this problem?

0
votes

So I'm trying to run Docker from the VS code plug in,

Trying to build a Docker image, to see if it works.

And I get this error message

Executing command: docker run --rm -it -p 3000:3000/tcp -p 5000:5000/tcp ecommerce:latest

docker: Error response from daemon: driver failed programming external connectivity on endpoint clever_hermann (4c4b6a299257d59a8bad812ee498ecbe689a1e134492dfbb8d9da4dc2acfee35): Bind for 0.0.0.0:5000 failed: port is already allocated. The terminal process "/usr/bin/zsh '-c', 'docker run --rm -it -p 3000:3000/tcp -p 5000:5000/tcp ecommerce:latest'" terminated with exit code: 125.

This is my Dockerfile

FROM node:latest

RUN mkdir /app

WORKDIR /app

COPY package.json .

RUN npm install

COPY . .

EXPOSE 3000

EXPOSE 5000

CMD [ "npm", "run", "dev" ]

Any clues on how to continue?

1
docker
Do you have any other app running on your port 5000? (host port, not the guest) – mmonteirocl
apparently I do, but I have no idea how to check that out. I dont even know what a port is, in the IT meaning. But issue solved with the answer below – MrFacundo
Of course is solved. Because it's not using the port 5000. The 5000 is not reserved. Maybe you did a npm server run on 5000 or a other service – mmonteirocl
@mommonteirocl I dont understand. What thing is not using port 5000? what does "the port 5000 is not reserved"? – MrFacundo

1 Answers

2
votes

This is because some other apps or containers are running on your machine and aquired those port numbers. But still you can run by using port-mapping changes.

docker run --rm -it  -p 8282:3000/tcp -p 8181:5000/tcp ecommerce:latest

In above command you are mapping container port 3000/tcpto your machine localhost:8282 and same for 5000/tcp.

Once containers are running then goto browser http://localhost:8181 and http://localhost:8282 for respective output