Cannot connect to internet from inside a docker container in Ubuntu VM

Question

Hi,

I am trying to access internet from inside docker containers in an Ubuntu VM. According to the azure documentation found here: https://zcusa.951200.xyz/en-us/azure/virtual-network/deploy-container-networking#deploy-plug-in-for-docker-containers

I deployed the plugin, also created the container using the command ./docker-run.sh ... but still there is no internet access from inside the container, I am not able to run any commands in the container like ping, curl, apt-get, etc so Internet is not yet enabled in the docker container.

Is there a way that I can troubleshoot or test that conectivity to internet from inside the docker container?

Answer

Hello Gabriel Castillo,

Thanks for your question.

Try the following as torubleshooting steps to pindown the issue:

Check Docker network configuration

docker network ls
docker network inspect bridge

Inspect the specific container's network details

docker inspect

Verify DNS configuration inside the container:

cat /etc/resolv.conf

Test network connectivity from the host itself to see if its a host issue

ping 8.8.8.8
ping google.com

Also see the stackoverlow post for an ubuntu machine https://stackoverflow.com/questions/73313328/how-to-troubleshoot-docker-network-issues

You can mark it 'Accept Answer' and 'Upvote' if this helped you

Regards,

Abiola

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Cannot connect to internet from inside a docker container in Ubuntu VM

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