[dockerv2] Pushing images doesn't seem to work

[stp-ip]

Is this a BUG REPORT or FEATURE REQUEST?:
bug

What happened:
Pushing an image currently fails.

What you expected to happen:
Pushing images using the vanity URL should work.

Anything else we need to know?:
Needs a bit more investigation.

[erbesharat]

Can you please describe what actually happens? Pushing doesn't work for me too. Need some more information to debug. Only thing I get from docker cli is:

The push refers to repository [docker.example.test/XXXXX/make]
2c0a741643a8: Preparing 
503e53e365f3: Preparing 
unsupported: Unsupported operation.

[stp-ip]

Mostly me logging this as high level not working. Didn't have time to dig into it more. Also not that high in priority as dockerv2 needs to be stable for public serving first before we look into pushing and private images.