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

I have the same issue, and tried the steps mentioned, but seems none works until refresh the network settings.

The steps:

1. As mentioned, add DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4 --ip-masq=true" to /etc/default/docker.
2. Manually flush the PREROUTING table contents using the iptables -t nat -F POSTROUTING . After running this, restart docker and it will initialize the nat table with the new IP range.