Hi,

Does anyone know who to contact to report problems with
telemetry.ceph.com?

After a reasonably successful update of my cluster, I received a
HEALTH_WARN [Telemetry requires re-opt-in]  even though I had already
re-approved telemetry.

While trying to understand the problem, I stumbled across the fact that
although the host telemetry.ceph.com has an IPv4 and an IPv6 address, I
cannot reach it because IPv6 only has a dropping firewall or something
similar attached to it. 

Now, I can configure a proxy that also reaches the legacy Internet, but
it also tried to reach IPv6 first, so that currently no IPv6-enabled
Ceph cluster should be visible in the telemetry.

My workaround would now be to overlay telemetry.ceph.com on the DNS 
cache... but that's just a hack.

----- raw shell output for reproduction -----

 > host telemetry.ceph.com
 telemetry.ceph.com has address 8.43.84.137
 telemetry.ceph.com has IPv6 address 2620:52:3:3:201a:4aff:feab:8409

 > telnet 2620:52:3:3:201a:4aff:feab:8409  80
 Trying 2620:52:3:3:201a:4aff:feab:8409...
 telnet: Unable to connect to remote host: Connection timed out

 > telnet 8.43.84.137  80
 Trying 8.43.84.137...
 Connected to 8.43.84.137.
 Escape character is '^]'.
 get / HTTP/1.0

 HTTP/1.1 302 Found
 Location: https://telemetry.ceph.com/
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