I got an email on 2024-12-05 saying that that Azure CDN from
Edgio/Verizon is going to shut down sooner than expected. The shutdown
date was supposed to be 2025-11-04, now it is 2024-01-15 (about one
month from now).
This affects (at least) snowflake-broker.azureedge.net, which was first
set up and is still on Azure CDN with Edgio. I think that
snowflake-broker.azureedge.net has not been used by this team since 2021
and https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/merge_re….
But it is still getting some use from somewhere, as evidenced by the
nonzero monthly bills:
https://gitlab.torproject.org/tpo/anti-censorship/team/-/wikis/Snowflake-co…
Whatever is out there that is still using snowflake-broker.azureedge.net
will likely stop working after 2025-01-15.
> Date: 5 Dec 2024 17:03:50 +0000
> From: Microsoft Azure <azure-noreply(a)microsoft.com>
> Subject: Urgent action required: Migrate workloads on Azure CDN from Edgio (formerly Verizon) before 15 January 2025
>
> Migrate to Azure Front Door or other CDN services as soon as possible
> to avoid service disruptions.
>
> Migrate workloads on Azure CDN from Edgio (formerly Verizon) before 15
> January 2025.
>
> You're receiving this notice because you're currently using Azure CDN
> Standard/Premium from Edgio.
>
> All Azure CDN from Edgio customers must migrate their workloads to
> Azure Front Door or other CDN services before 15 January 2025 as Edgio
> has advised their platform is currently scheduled to be shut down by
> that date. Migrate as soon as possible to avoid an imminent service
> shut-down.
>
> On 31 October 2024, we sent you a notice advising that Azure CDN
> Standard/Premium from Edgio (formerly Verizon) will be retired on
> 4 November 2025, and that customers of this service must migrate their
> workload(s) to a comparable service before this date to avoid service
> interruptions. In that email we also advised given that Edgio filed
> for Chapter 11 Bankruptcy on 9 September 2024, Microsoft cannot
> guarantee that Edgio will continue to support this service through
> 4 November 2025 as previously stated.
Online references about Azure CDN with Edgio retirement:
https://learn.microsoft.com/en-us/azure/cdn/edgio-retirement-faqhttps://azure.microsoft.com/updates?id=467688
I did try setting up a Front Door CDN profile (which is the recommended
replacement for Edgio), following the migration instructions:
https://learn.microsoft.com/en-us/azure/frontdoor/migrate-cdn-to-front-door
I got the hostname:
snowflake-broker-hadmaqbnc4dmcffs.z03.azurefd.net
It works as an alias for the broker:
curl -i https://snowflake-broker-hadmaqbnc4dmcffs.z03.azurefd.net/debug
However, it apparently does not work with domain fronting, so is likely
not actually useful. Front Door not working with domain fronting is
consistent with prior announcements by Azure:
https://github.com/net4people/bbs/issues/67