In nova/OpenStackNovaUser.php, I can see that saveToken() is trying to save a long token, but when we retrieve it in loadToken() we only get 256 bytes.
This means that save/load token are totally broken, which is no doubt contributing to that awful log-out-and-in-again issue on wikitech.
The code that writes is here: https://github.com/wikimedia/mediawiki-extensions-OpenStackManager/blob/master/nova/OpenStackNovaUser.php#L105
Probably the db field is not big enough. Sean, can you verify that that field is limited to 256 chars and increase it's size to 2048? (I've verified that my current failure case is a 985-char string but I can't guarantee that's the max token size.)
I've altered openstack_tokens.token to varbinary(2048). Presumably we also need to patch the extension?
Change 195472 had a related patch set uploaded (by Andrew Bogott):
Support 2048 byte Keystone tokens
Change 195629 had a related patch set uploaded (by Andrew Bogott):
Revert "Set keystone tokens to last 30 days."