On Tuesday morning I'm going to switch the OpenStack Keystone token
engine from UUID tokens to fernet tokens. The changeover will be
abrupt and cause all existing sessions to reset (e.g. if you're using
Horizon you'll have to log back in, and if you're in the middle of
creating a VM that creation will probably fail.) Should you encounter
this interruption, just try again in a few minutes and everything should
The new tokens will generally behave the same from a user standpoint,
but will allow us to simplify and modernize things on our end a bit.
The switch will happen at 15:00 UTC on this Tuesday, 2020-02-18. That's
7AM, Pacific Coast time.