How to pull layers one by one in Docker to avoid connection timeout?

Question

I keep getting connection timeout while pulling an image:

First, it starts downloading the 3 first layers, after one of them finish, the 4th layer try to

Answer 1

The Docker daemon has a --max-concurrent-downloads option. According to the documentation, it sets the max concurrent downloads for each pull.

So you can start the daemon with dockerd --max-concurrent-downloads 1 to get the desired effect.

See the dockerd documentation for how to set daemon options on startup.