CODEWITHSUNDEEP
djangodocker
Alex
Alex

Reputation: 11

Docker: exposed ports cannot be accessed in another container

Based on image 'python:2.7', I created two containers: container1, container2

Dockerfile for test1:

FROM    python:2.7
EXPOSE  6789
CMD     ["bash", "-c", "'while true;do sleep 1000;done;'"]

Dockerfile for test2:

FROM    python:2.7
EXPOSE  9876
CMD     ["bash", "-c", "'while true;do sleep 1000;done;'"]

Then I built two new images with the dockerfiles above, named: test1, test2

Container1:

docker run --name container1 test1

And I also setup a Django server on port 6789 in container1 with:

#In Django workspace
./manage.py runserver 6789

Container2:

docker run --name container2 --link container1:container1 test2

And I also setup a Django server on port 9876 in container2 with:

#In Django workspace
./manage.py runserver 9876

In container2, when I run

curl container1_ip:6789

I got connection refused error.

How can I configure it to make it work?

I also created a container with official nginx image, it has two default ports (80, 443) exposed, and then created another container linked to nginx container, in the container, I did the same thing

curl nginx_ip:80  #successful

and

curl nginx_ip:443  #connection refused

Why this happen? Why 80 works well, and 443 doesn't work?

Upvotes: 0

Views: 451

Answers (2)

Nicolas B.
Nicolas B.

Reputation: 325

What are you trying to do by "curling" port 6789/9876 of your container ? is there anything (a ftp server or something else?) behind these ports ?

Before trying to reach it from the other container, you should try reaching it from the container itself

In container1 :

curl container1_ip:6789

I think you can access these ports, but there is just nothing listening to them on your container.

EDIT : If you downvote me, please comment explaining why, so i can improve my answers, thanks.

Upvotes: 1

Alex
Alex

Reputation: 11

The problem is not how to configure docker, it is some config issue about Django. Django is listening localhost:port by default, we should specify a ip address to listen, or with '0.0.0.0' to make it listen all ip address.

Upvotes: 0

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