Testing CloudFront for distribution of substitutes on ci.guix.info

[Ricardo Wurmus]

Hi Guix,

in order to improve availability of binary substitutes and download
speeds for many users, we will experiment with Amazon’s CloudFront CDN
service for https://ci.guix.info.  Note that this only concerns the
distribution of substitutes; builds still happen on the same build farm
as before, berlin.guixsd.org.

Starting on Wednesday 23 at 01:15 UTC requests for substitutes that are
sent to https://ci.guix.info will be served by the CDN instead.  This
experiment is expected to last up to one month.  The maintainers and
Guix system administrators will re-evaluate the use of a CDN for
ci.guix.info at that point.

If you prefer to bypass the CDN you can connect to
https://berlin.guixsd.org directly as before.  On a Guix system you can
override the list of default substitute servers with this services
value:

(modify-services %desktop-services
  (guix-service-type
   config => (guix-configuration
              (inherit config)
              (substitute-urls
               (list "https://berlin.guixsd.org";)))))

--
Ricardo
on behalf of the Guix maintainers