app-name-validation

solum app create with app name '-123'

solum-deployer shows following error:

{"explanation": "The server could not comply with the request since it is either malformed or otherwise incorrect.", "code": 400, "error": {"message": "Invalid stack name -123-fd116777-0ab7-4139-ae4a-c8c5291db5a7 must contain only alphanumeric or \"_-.\" characters, must start with alpha and must be 255 characters or less.", "traceback": "Traceback (most recent call last):\n\n File \"/opt/stack/heat/heat/common/context.py\", line 329, in wrapped\n return func(self, ctx, *args, **kwargs)\n\n File \"/opt/stack/heat/heat/engine/service.py\", line 802, in create_stack\n stack_user_project_id, convergence, parent_resource_name)\n\n File \"/opt/stack/heat/heat/engine/service.py\", line 677, in _parse_template_and_validate_stack\n **common_params)\n\n File \"/opt/stack/heat/heat/engine/stack.py\", line 150, in __init__\n _validate_stack_name(stack_name)\n\n File \"/opt/stack/heat/heat/engine/stack.py\", line 144, in _validate_stack_name\n raise exception.StackValidationFailed(message=message)\n\nStackValidationFailed: Invalid stack name -123-fd116777-0ab7-4139-ae4a-c8c5291db5a7 must contain only alphanumeric or \"_-.\" characters, must start with alpha and must be 255 characters or less.\n", "type": "StackValidationFailed"}, "title": "Bad Request"}
 log_http_response /usr/local/lib/python2.7/dist-packages/heatclient/common/http.py:155
2016-05-05 19:14:08.113 10821 ERROR solum.deployer.handlers.heat [-] Error creating Heat Stack for, assembly 2
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat [-] ERROR: Invalid stack name -123-fd116777-0ab7-4139-ae4a-c8c5291db5a7 must contain only alphanumeric or "_-." characters, must start with alpha and must be 255 characters or less.
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat Traceback (most recent call last):
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat File "/opt/stack/solum/solum/deployer/handlers/heat.py", line 454, in deploy
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat files=get_file_dict)
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat File "/usr/local/lib/python2.7/dist-packages/heatclient/v1/stacks.py", line 162, in create
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat data=kwargs, headers=headers)
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat File "/usr/local/lib/python2.7/dist-packages/heatclient/common/http.py", line 294, in post
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat return self.client_request("POST", url, **kwargs)
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat File "/usr/local/lib/python2.7/dist-packages/heatclient/common/http.py", line 284, in client_request
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat resp, body = self.json_request(method, url, **kwargs)
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat File "/usr/local/lib/python2.7/dist-packages/heatclient/common/http.py", line 273, in json_request
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat resp = self._http_request(url, method, **kwargs)
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat File "/usr/local/lib/python2.7/dist-packages/heatclient/common/http.py", line 228, in _http_request
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat raise exc.from_response(resp)
2016-05-05 19:14:08.114 10821 ERROR solum.deployer.handlers.heat HTTPBadRequest: ERROR: Invalid stack name -123-fd116777-0ab7-4139-ae4a-c8c5291db5a7 must contain only alphanumeric or "_-." characters, must start with alpha and must be 255 characters or less.