[Labs-announce] DNS maintenance window on Thursday, 14:00 UTC

[Andrew Bogott]

This Thursday we're going to do some fairly intrusive rearranging of the 
Labs DNS system[1].  No action is required on the part of Labs users, 
but be ready for the following:

- For some or all of the window I will be disabling instance creation 
and deletion.  Attempts to create or delete instances (or perform any 
other actions that use the nova API) will fail with unhelpful error 
messages.

- CI will be partially or completely broken (some CI tests require new 
instance creation)

- In theory there will not be DNS service interruptions, but in practice 
there may be.

This change is part of a series of planned DNS updates intended to 
improve redundancy and performance.  Expect an hour of weirdness 
beginning at 14:00 UTC, 7:00 AM San Francisco.


[1] https://phabricator.wikimedia.org/T128737