Using CloudFront to Distribute Substitutes on ci.guix.info

[Chris Marusich]

Hi Guix,

To improve the latency, download speed, and availability of substitutes,
the Guix project has decided to resume distribution of substitutes via
the Amazon CloudFront CDN for a limited time.  This only concerns the
distribution of substitutes; the substitutes themselves will still be
built on the same build farm as before, at berlin.guixsd.org.

Starting at 05:15 UTC on Monday, April 29th, requests for substitutes
that are sent to https://ci.guix.info will be served by the CDN instead.
This is expected to last up to 4 months.  No downtime is expected during
the transition.  If you are already using ci.guix.info for substitutes,
you do not need to make any changes in order to continue using it.
After 4 months, we will stop using the CDN, and the maintainers and Guix
system administrators will re-evaluate its use at that time.

If you prefer to bypass the CDN, you can connect to
https://berlin.guixsd.org directly as before.  If you are using Guix
System, you can override the list of default substitute servers with a
service declaration like this one:

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

Happy hacking!

-- 
Chris

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