Show the total size and progress of the total downloaded size when pulling the image

[ghorbani-ali]

Description

Hi
When we pull the images, nothing is displayed about the image size, how many layers are there, or how much is downloaded. This can be most user-friendly.

However, from my study of the contribution documents, I found that to start working on such a change, I need to get approval from your team first.

May I work on this? Any insight?

[thaJeztah]

Thanks for opening this ticket! We are planning to make overall improvements to various parts of the CLI (and API), which includes improvements to progress output such as on docker pull.

However, there's some substantial work to be done for this, and some of those changes will result in breaking changes. Unfortunately, some of the "streaming" responses used for progress-bars originate from very early on in the docker project, and these have not been well-defined / documented; as a result, many implementations using the API started to depend on the (sometimes undocumented) behavior, which makes it very risky to make changes.

Usually, we prefer making "granular" changes / improvements, but for this case, every small improvement could cause compatibility issues, and therefore we want to work on a more invasive, one-time, overhaul of these parts.

We have some internal tickets (at Docker), and some initial designs for improvements, but they are still being finalised before we'll be opening a proposal for changes. A placeholder ticket (but it's not yet very specific) can be found below;

• UX: improve messages / warnings /errors to include platform (os/arch/xx) #41838

I'll keep this ticket open as this is definitely part of the work that should be considered as part of the rewrite, but (as outlined above) we prefer not to make this change yet as a separate contribution, but rather as part of the change as a whole.

[ghorbani-ali]

@thaJeztah Thanks for your reply. I just want to express my willingness to be apart of this process. If there is any possibility, let me know.

Bests.