Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything

Question

I\'ve been trying to run Docker build on various files which previously worked before, which are now no longer working.

As soon as the Docker file included any line

Answer 1

After much headache I found the answer. Could not resolve 'archive.ubuntu.com' can be fixed by making the following changes:

1. Uncomment the following line in /etc/default/docker
DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4"

2. Restart the Docker service sudo service docker restart

3. Delete any images which have cached the invalid DNS settings.

4. Build again and the problem should be solved.

Credit goes to Andrew SB