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

For anyone who is also having this problem, I solved my problem by editing the /etc/default/docker file, as suggested by other answers and questions. However I had no idea what IP to use as the DNS.

It was only after a while I figured out I had to run ifconfig docker on the host to show the IP for the docker network interface.

docker0   Link encap:Ethernet  Endereço de HW 02:42:69:ba:b4:07  
          inet end.: 172.17.0.1  Bcast:0.0.0.0  Masc:255.255.0.0
          endereço inet6: fe80::42:69ff:feba:b407/64 Escopo:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Métrica:1
          pacotes RX:8433 erros:0 descartados:0 excesso:0 quadro:0
          Pacotes TX:9876 erros:0 descartados:0 excesso:0 portadora:0
          colisões:0 txqueuelen:0 
          RX bytes:484195 (484.1 KB) TX bytes:24564528 (24.5 MB)

It was 172.17.0.1 in my case. Hope this helps anyone who is also having this issue.