I was having issues having my docker images uploading to Google Container Registry. This has happened to me on a few occassions and I couldn’t figure out what was wrong and then when it started working again I didn’t know what fixed it.

This past Wednesday it happened to me again. I tried to use the simple command:

gcloud docker -- push gcr.io/super-cool-project/projects-nginx:1.0.0


And it sat there for a couple minutes until I got this error:

Post https://us.gcr.io/v2/super-cool-project/blobs/uploads/: dial tcp xx.xxx.xx.xx:xxx: i/o timeout


Pretty helpful huh? After I got this message I did a bunch of research and came across Google’s documentation for the container registry. It wasn’t helpful either. https://cloud.google.com/container-registry/docs/troubleshooting

After diving into the issue for a few hours I came across a similar issue with Docker itself.

How to really fix it:

1. Open up your network preferences on your Mac (these should work for other OSes as well)
2. Click on “advanced”
3. Click the “DNS” tab
4. Click the “+” button to add a new DNS servers
5. Enter in the following values and click save

8.8.8.8
That’s it. Try the command again and forever you will be golden.