Docker-py: While authenticated, can pull private dockerhub image, but can't get_registry_data() of that same private image

[paulcdejean]

dc = docker.from_env()
dc.login('username', 'password')
private_image = dc.images.pull('org/private:staging') # Is successful
private_image_registry_info = dc.images.get_registry_data('org/private:staging') #fails

requests.exceptions.HTTPError: 500 Server Error: Internal Server Error for url: http+docker://localhost/v1.35/distribution/prg/private:staging/json

During handling of the above exception, another exception occurred:

docker.errors.APIError: 500 Server Error: Internal Server Error ("errors:
denied: requested access to the resource is denied
unauthorized: authentication required
")

get_registry_data() for public images works fine.

If I remove the login I get pull access denied for org/private which is the expected behavior.

Full stacktrace:

```
Traceback (most recent call last):
File "/usr/local/lib/python3.6/dist-packages/docker/api/client.py", line 246, in _raise_for_status
response.raise_for_status()
File "/usr/local/lib/python3.6/dist-packages/requests/models.py", line 940, in raise_for_status
raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 500 Server Error: Internal Server Error for url: http+docker://localhost/v1.35/distribution/org/private:staging/json

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "../docker_cicd", line 103, in
docker_cicd()
File "/usr/local/lib/python3.6/dist-packages/click/core.py", line 764, in __call__
return self.main(args, *kwargs)
File "/usr/local/lib/python3.6/dist-packages/click/core.py", line 717, in main
rv = self.invoke(ctx)
File "/usr/local/lib/python3.6/dist-packages/click/core.py", line 956, in invoke
return ctx.invoke(self.callback, *ctx.params)
File "/usr/local/lib/python3.6/dist-packages/click/core.py", line 555, in invoke
return callback(args, *kwargs)
File "../docker_cicd", line 60, in docker_cicd
output_remote = dc.images.get_registry_data('org/private:staging')
File "/usr/local/lib/python3.6/dist-packages/docker/models/images.py", line 329, in get_registry_data
attrs=self.client.api.inspect_distribution(name),
File "/usr/local/lib/python3.6/dist-packages/docker/utils/decorators.py", line 34, in wrapper
return f(self, *args, *kwargs)
File "/usr/local/lib/python3.6/dist-packages/docker/utils/decorators.py", line 19, in wrapped
return f(self, resource_id, args, *kwargs)
File "/usr/local/lib/python3.6/dist-packages/docker/api/image.py", line 266, in inspect_distribution
self._get(self._url("/distribution/{0}/json", image)), True
File "/usr/local/lib/python3.6/dist-packages/docker/api/client.py", line 252, in _result
self._raise_for_status(response)
File "/usr/local/lib/python3.6/dist-packages/docker/api/client.py", line 248, in _raise_for_status
raise create_api_error_from_http_exception(e)
File "/usr/local/lib/python3.6/dist-packages/docker/errors.py", line 31, in create_api_error_from_http_exception
raise cls(e, response=response, explanation=explanation)
docker.errors.APIError: 500 Server Error: Internal Server Error ("errors:
denied: requested access to the resource is denied
unauthorized: authentication required
")
```

[shin-]

Thanks for the report!

[Mattrack]

I'm experiencing the same issue. I was able to implement my own inspect_distribution method using an HTTP client, but it'd be much more reliable if I could use the Docker API consistently in my project.

@shin- I saw the fix you made for this issue in #2227 , and I was wondering if by any chance this fix could be part of a next minor/patch update, instead of 4.0?

Thank you! 👍 :)

EDIT: For now I'm installing docker-py using pip install git+git://github.com/docker/docker-py.git@b6f6e7270ef1acfe7398b99b575d22d0d37ae8bf 👍

[regan-karlewicz]

Any timeline estimate to release the fix for this bug? Thanks!

[itssimon]

I'm encountering the same issue and see that it has been fixed in January but not yet released. Could we please get this released sooner rather than later?