Question

In droplet : My Docker running a Flask server on port 6000 is not accessible outside

Hello guys,

I have an issue with a droplet.

When I run my docker on host 0.0.0.0 and on port 6000 It seems it is not accessible when I do <public ip address>:6000

Although, following the tutorial here, I have ran the commands below : sudo ufw default deny incoming sudo ufw default allow outgoing sudo ufw enable sudo ufw allow 6000/tcp

Does someone knows if the port 6000 is allowed to be used in DO or I forgot to configure something ?

Below the dockerfile :

FROM python:3.8.1

ENV FLASK_APP=nace_recommender.api.app:app
ENV FLASK_ENV=development
ENV WORKERS=4

RUN useradd -b /home -U banana && mkdir -p /home/banana/app
COPY . /home/banana/app
RUN chown -R banana:banana /home/banana
USER banana

# set working directory
WORKDIR /home/banana/app

RUN pip install -r requirements.txt 

EXPOSE 6000

CMD /home/banana/.local/bin/gunicorn --preload -w $WORKERS -b 0.0.0.0:6000 "nace_recommender.api.app:app()" -t 60
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Bobby Iliev • June 19, 2021

Hi there,

The Dockerifle that you’ve shared indicates that the service will listen on port 6000 inside the container itself.

Note that you would need to use the -p 6000:6000 flag and expose the container port to the host.

Then in order to check if the port is exposed correctly on the host you could run the following command:

netstat -plant | grep

Let me know how it goes! Regards, Bobby

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