Subject: Re: bug#61324: [PATCH] download: Add bordeaux.guix.gnu.org as a content addressed mirror.

From: Ludovic Courtès <[email-masked]>
Date: Fri, 10 Feb 2023 23:41:39 +0100

Hi!

Christopher Baines <[email-masked]> skribis:

> bordeaux.guix.gnu.org now provides access to some files by hash. This is done
> through the nar-herder finding a nar produced by a fixed output derivation for
> the requested content, and then providing the content stored inside that nar.

Nice!

> I've put this new entry at the start of the list, as I think it's more likely
> to have content than the others. Because bordeaux.guix.gnu.org stores nars
> indefinitely, my suspicion is that it's going to be able to fulfil more
> requests than ci.guix.gnu.org, which relies on the file requested being in the
> store (so the now frequent garbage collection is going to limit the files
> available).

Right, could be.  (At one point we had nginx caching for /file URLs; not
sure if that’s still the case, and it wouldn’t really solve the
problem.)

> * guix/download.scm (%content-addressed-mirrors): Add bordeaux.guix.gnu.org.
> ---
>  guix/download.scm | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/guix/download.scm b/guix/download.scm
> index fff54d7a17..561a893eee 100644
> --- a/guix/download.scm
> +++ b/guix/download.scm
> @@ -387,7 +387,11 @@ (define (guix-publish host)
>                          file "/" (symbol->string algo) "/"
>                          (bytevector->nix-base32-string hash))))
>  
> -     (list (guix-publish "ci.guix.gnu.org")
> +     (list (guix-publish
> +            ;; bordeaux.guix.gnu.org uses the nar-herder rather than guix
> +            ;; publish, but it supports the same style of requests
> +            "bordeaux.guix.gnu.org")
> +           (guix-publish "ci.guix.gnu.org")

LGTM, thanks!

Ludo’.