Can I pass --max-concurrent-downloads as a flag?

Question

I'm working with a poor internet connection and trying to pull and run a image.

I wanted to download one layer at a time and per documentation tried adding a flat --max-concurrent-downloads like so:

docker run --rm -p 8787:8787 -e PASSWORD=blah --max-concurrent-downloads=1 rocker/verse

But this gives an error:

unknown flag: --max-concurrent-downloads See 'docker run --help'.

I tried typing docker run --help and interestingly did not see the option --max-concurrent-downloads.

I'm using Docker Toolbox since I'm on a old Mac.

Over here under l there's an option for --max-concurrent-downloads however this doesn't appear on my terminal when typing docker run --help

How can I change the default of downloading 3 layers at a time to just one?

Answer 1

From the official documentation: (https://docs.docker.com/engine/reference/commandline/pull/#concurrent-downloads)

You can pass --max-concurrent-downloads during a pull operation.

You can set --max-concurrent-downloads with the dockerd command.

If you're using the docker Desktop GUI for Mac or Windows:

You can edit the .json file directly in docker engine settings: