Created question in FIWARE Q/A platform on 31-03-2016 at 17:03
Please, ANSWER this question AT https://ask.fiware.org/question/459/internet-connection-not-working-from-within-docker-container/

Question:
Internet connection not working from within docker container

Description:
Hello everyone,

we have problems building docker images on Fiware instance. The problem is, that from within a docker container, we can't download any data from internet. Commands like wget, composer, apt-get don't work. Strangely ping to any live address works fine from within containers.

My Dockerfile starts like this:

FROM php:7.0.4-apache
RUN apt-get update && apt-get install -y zlib1g-dev libicu-dev g++
...
ADD entrypoint.sh /
RUN chmod +x /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

but the build fails...

Building web
Step 1 : FROM php:7.0.4-apache
---> ce68d55b8d56
Step 2 : RUN apt-get update && apt-get install -y zlib1g-dev libicu-dev g++
---> Running in 9108f4c9afcc
Ign http://httpredir.debian.org jessie InRelease
Ign http://security.debian.org jessie/updates InRelease
Ign http://httpredir.debian.org jessie-updates InRelease
Get:1 http://httpredir.debian.org jessie-updates Release.gpg [1554 B]
Get:2 http://httpredir.debian.org jessie-updates Release.gpg [1554 B]
Err http://security.debian.org jessie/updates Release.gpg
Connection failed [IP: 195.20.242.89 80]
Err http://httpredir.debian.org jessie Release.gpg
Connection failed
Get:3 http://httpredir.debian.org jessie-updates Release.gpg [1554 B]

Same problems occurred when we uploaded existing container that works on different machines (Linode) to Fiware instance.

Internet connection from Instance itself works, just not from within a docker container.

Has anyone had the same issues with connectivity?

Thank you