[Serve] serve status breaks when disabling http proxy

[saswatac]

What happened + What you expected to happen

When running serve status, i get an error caused by an validation error.

Traceback (most recent call last):
  File "/home/container_user/.local/bin/serve", line 8, in <module>
    sys.exit(cli())
  File "/usr/local/lib/python3.10/dist-packages/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/click/core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.10/dist-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python3.10/dist-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.10/dist-packages/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/ray/serve/scripts.py", line 702, in status
    **ServeSubmissionClient(address).get_serve_details()
  File "/usr/local/lib/python3.10/dist-packages/ray/dashboard/modules/serve/sdk.py", line 100, in get_serve_details
    self._raise_error(response)
  File "/usr/local/lib/python3.10/dist-packages/ray/dashboard/modules/dashboard_sdk.py", line 283, in _raise_error
    raise RuntimeError(
RuntimeError: Request failed with status code 503: Failed to get a response from the controller. The GCS may be down, please retry later: ray::ServeController.get_serve_instance_details() (pid=12884, ip=10.244.182.9, actor_id=bea8e193585be32034f33c4001000000, repr=<ray.serve._private.controller.ServeController object at 0x7ff0518c6230>)
  File "/usr/lib/python3.10/concurrent/futures/_base.py", line 451, in result
    return self.__get_result()
  File "/usr/lib/python3.10/concurrent/futures/_base.py", line 403, in __get_result
    raise self._exception
  File "/usr/local/lib/python3.10/dist-packages/ray/serve/_private/controller.py", line 895, in get_serve_instance_details
    return ServeInstanceDetails(
  File "pydantic/main.py", line 341, in pydantic.main.BaseModel.__init__
pydantic.error_wrappers.ValidationError: 1 validation error for ServeInstanceDetails
proxy_location
  value is not a valid enumeration member; permitted: 'Disabled', 'HeadOnly', 'EveryNode' (type=type_error.enum; enum_values=[<ProxyLocation.Disabled: 'Disabled'>, <ProxyLocation.HeadOnly: 'HeadOnly'>, <ProxyLocation.EveryNode: 'EveryNode'>]).

Versions / Dependencies

2.8.0

Reproduction script

1. start ray ray start --head
2. python ray_debug.py

from ray import serve
from ray.serve.config import ProxyLocation

@serve.deployment
class Server:
  def dummy(self):
    print("hello")
    return "hello"

app = Server.bind()
serve.start(detached=True, proxy_location=ProxyLocation.Disabled)
serve.run(app)

3. run serve status

Issue Severity

Medium: It is a significant difficulty but I can work around it.