GNU bug report logs - #62153
[PATCH 0/2] Add Docker layered image for pack and system

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Oleg Pykhalov <go.wigust <at> gmail.com>
Cc: Josselin Poiret <dev <at> jpoiret.xyz>, Simon Tournier <zimon.toutoune <at> gmail.com>, Mathieu Othacehe <othacehe <at> gnu.org>, Tobias Geerinckx-Rice <me <at> tobias.gr>, Ricardo Wurmus <rekado <at> elephly.net>, Christopher Baines <guix <at> cbaines.net>, 62153 <at> debbugs.gnu.org
Subject: [bug#62153] [PATCH 3/5] guix: docker: Build layered images.
Date: Thu, 18 Jan 2024 15:55:39 +0100

Hi Oleg!

Oleg Pykhalov <go.wigust <at> gmail.com> skribis:

> +;; The maximum number of layers allowed in a Docker image is typically around
> +;; 128, although it may vary depending on the Docker daemon. However, we
> +;; recommend setting the limit to 100 to ensure sufficient room for future
> +;; extensions.
> +(define %docker-image-max-layers
> +  #f)

It just occurred to me that the meaning of #f is unclear here; also, the
manual does not specify the default value of ‘--max-layers’.

Should we:

  1. Set ‘%docker-image-max-layers’ to an integer, maybe 100, in
     accordance with the comment above?

  2. Clarify in the manual what the default is, and explain that users
     can pass ‘--max-layers=1’ if they want, well, a single layer.

Thoughts?

Ludo’.

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