On my MacBook with Mac OS X 10.11 (El Capitan) and Docker 1.12.0, Docker did not read manually set DNS entries from the /etc/hosts file.
When I executed „docker push“ for example, this resulted in „no such hosts“ errors:
Put http://shuttle:5000/v1/repositories/webfrontend/: dial tcp: lookup shuttle on 192.168.65.1:53: no such host
On Mac OS, Docker is running in a host container itself. Thus, you’ll have to add DNS entries to the container’s /etc/hosts file. To fix it, get into the running Docker Host:
This took a while on my machine, I needed to press Ctrl+C for the login prompt to show up. Log in with „root“ (no password required).
Edit the /etc/hosts file in the Docker Host using vi:
Note: Insert after pressing „i“, save by pressing Escape and then type „:wq“ <Return>.
Restart the Docker Daemon with:
service docker restart
Detach from the screen session by pressing Ctrl+A, then press D.
Docker should now use the correct /etc/hosts entries.