Docker Support

When publishing a docker repository, I get an error.

Here are details of the repository

{'_href': '/pulp/api/v2/repositories/redhat-openshift3_beta-ose-deployer/',
 '_id': {'$oid': '54f8da6baa9ea96c3522e6d7'},
 '_ns': 'repos',
 'content_unit_counts': {'docker_image': 9},
 'description': 'Handles deploying containers when new versions are available or triggered',
 'display_name': 'redhat-openshift3_beta-ose-deployer',
 'distributors': [{'_id': {'$oid': '54f8da6baa9ea96c3522e6da'},
                   '_ns': 'repo_distributors',
                   'auto_publish': True,
                   'config': {'protected': False,
                              'redirect-url': 'http://internal.redhat.server.com/containers/registry/',
                              'repo-registry-id': 'openshift3_beta/ose-deployer'},
                   'distributor_type_id': 'docker_distributor_web',
                   'id': 'docker_web_distributor_name_cli',
                   'last_publish': '2015-03-06T13:44:07Z',
                   'repo_id': 'redhat-openshift3_beta-ose-deployer',
                   'scheduled_publishes': []},
                  {'_id': {'$oid': '54f8da6baa9ea96c3522e6d9'},
                   '_ns': 'repo_distributors',
                   'auto_publish': True,
                   'config': {'protected': False,
                              'redirect-url': 'http://internal.redhat.server.com/containers/registry/',
                              'repo-registry-id': 'openshift3_beta/ose-deployer'},
                   'distributor_type_id': 'docker_distributor_export',
                   'id': 'docker_export_distributor_name_cli',
                   'last_publish': '2015-03-06T13:44:00Z',
                   'repo_id': 'redhat-openshift3_beta-ose-deployer',
                   'scheduled_publishes': []}],
 'id': 'redhat-openshift3_beta-ose-deployer',
 'importers': [{'_id': {'$oid': '54f8da6baa9ea96c3522e6d8'},
                '_ns': 'repo_importers',
                'config': {},
                'id': 'docker_importer',
                'importer_type_id': 'docker_importer',
                'last_sync': None,
                'repo_id': 'redhat-openshift3_beta-ose-deployer',
                'scheduled_syncs': []}],
 'last_unit_added': '2015-03-05T22:36:28Z',
 'last_unit_removed': None,
 'notes': {'_repo-type': 'docker-repo'},
 'scratchpad': {'tags': [{'image_id': 'c6bc2d82fcfd0c7a5a9560970b520dc7dddbc477bd97065aeb421b1749c8b73b',
                          'tag': 'latest'},
                         {'image_id': 'c6bc2d82fcfd0c7a5a9560970b520dc7dddbc477bd97065aeb421b1749c8b73b',
                          'tag': 'v0.3'}]}}

Attempting to publish with the REST API (or CLI) leads to a traceback in the spawned subtask:

Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/celery/app/trace.py", line 240, in trace_task
    R = retval = fun(*args, **kwargs)
  File "/usr/lib/python2.6/site-packages/pulp/server/async/tasks.py", line 337, in __call__
    return super(Task, self).__call__(*args, **kwargs)
  File "/usr/lib/python2.6/site-packages/celery/app/trace.py", line 437, in __protected_call__
    return self.run(*args, **kwargs)
  File "/usr/lib/python2.6/site-packages/pulp/server/managers/repo/publish.py", line 98, in publish
    transfer_repo, conduit, call_config)
  File "/usr/lib/python2.6/site-packages/pulp/server/managers/repo/publish.py", line 130, in _do_publish
    publish_report = publish_repo(transfer_repo, conduit, call_config)
  File "/usr/lib/python2.6/site-packages/pulp/server/async/tasks.py", line 492, in wrap_f
    return f(*args, **kwargs)
  File "/opt/pulp_docker/plugins/pulp_docker/plugins/distributors/distributor_web.py", line 123, in publish_repo
    return self._publisher.publish()
  File "/usr/lib/python2.6/site-packages/pulp/plugins/util/publish_step.py", line 508, in publish
    return self.process_lifecycle()
  File "/usr/lib/python2.6/site-packages/pulp/plugins/util/publish_step.py", line 457, in process_lifecycle
    super(PluginStep, self).process_lifecycle()
  File "/usr/lib/python2.6/site-packages/pulp/plugins/util/publish_step.py", line 122, in process_lifecycle
    step.process()
  File "/usr/lib/python2.6/site-packages/pulp/plugins/util/publish_step.py", line 180, in process
    self._process_block()
  File "/usr/lib/python2.6/site-packages/pulp/plugins/util/publish_step.py", line 215, in _process_block
    self.process_main()
  File "/usr/lib/python2.6/site-packages/pulp/plugins/util/publish_step.py", line 776, in process_main
    shutil.copytree(timestamp_master_location, publish_location, symlinks=True)
  File "/usr/lib64/python2.6/shutil.py", line 136, in copytree
    names = os.listdir(src)
OSError: [Errno 20] Not a directory: '/var/lib/pulp/published/docker/master/redhat-openshift3_beta-ose-deployer/1425648629.96/redhat-openshift3_beta-ose-deployer.json'