#4982 [BUG] Flytekit Auth via flytekit on Windows not being supported Issue created by fiedlerNr9 Describe the bug Authenticating against an auth enabled flyte deployment fails on

windows

at this moment:

pyflyte -c config.yaml get launchplan

Failed with Exception Code: SYSTEM:Unknown
Traceback:
  File "C:\Users\jan\AppData\Local\Programs\Python\Python312\Lib\site-packages\grpc\_interceptor.py", line 315, in continuation
    response, call = self._thunk(new_method).with_call(
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "C:\Users\jan\AppData\Local\Programs\Python\Python312\Lib\site-packages\grpc\_interceptor.py", line 343, in with_call
    return self._with_call(
           ^^^^^^^^^^^^^^^^

  File "C:\Users\jan\AppData\Local\Programs\Python\Python312\Lib\site-packages\grpc\_interceptor.py", line 329, in _with_call
    call = self._interceptor.intercept_unary_unary(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "C:\Users\jan\AppData\Local\Programs\Python\Python312\Lib\site-packages\flytekit\clients\grpc_utils\auth_interceptor.py", line 65, in intercept_unary_unary
    self._authenticator.refresh_credentials()

  File "C:\Users\jan\AppData\Local\Programs\Python\Python312\Lib\site-packages\flytekit\clients\auth\authenticator.py", line 164, in refresh_credentials
    self._creds = self._auth_client.get_creds_from_remote()
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "C:\Users\jan\AppData\Local\Programs\Python\Python312\Lib\site-packages\flytekit\clients\auth\auth_client.py", line 348, in get_creds_from_remote
    ctx = get_context("fork")
          ^^^^^^^^^^^^^^^^^^^

  File "C:\Users\jan\AppData\Local\Programs\Python\Python312\Lib\multiprocessing\context.py", line 243, in get_context
    return super().get_context(method)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "C:\Users\jan\AppData\Local\Programs\Python\Python312\Lib\multiprocessing\context.py", line 193, in get_context
    raise ValueError('cannot find context for %r' % method) from None

This fails because in the auth_client we use the

fork

multiprocessing method, which is not supported for Windows. More Context below! Expected behavior Flytekit should open up a Browser Window to authenticate. Additional context to reproduce This fails because in the auth_client we use the

fork

multiprocessing method. This Line. According these Docs

fork

is not supported for Windows. We would need to use

spawn

. I tried replacing with

spawn

and got the following errors on mac os & Windows. MAC:

pyflyte -c config.yaml get launchplan                                                                                                                                                    
WARNING:root:Failed to refresh token. Kicking off a full authorization flow.
WARNING:root:Failed to refresh token. Kicking off a full authorization flow.
WARNING:root:Failed to refresh token. Kicking off a full authorization flow.
WARNING:root:Failed to refresh token. Kicking off a full authorization flow.
Failed with Exception Code: SYSTEM:Unknown
Traceback:
  File "/opt/homebrew/anaconda3/envs/windows_auth/lib/python3.9/site-packages/grpc/_interceptor.py", line 315, in continuation
    response, call = self._thunk(new_method).with_call(

  File "/opt/homebrew/anaconda3/envs/windows_auth/lib/python3.9/site-packages/grpc/_interceptor.py", line 343, in with_call
    return self._with_call(

  File "/opt/homebrew/anaconda3/envs/windows_auth/lib/python3.9/site-packages/grpc/_interceptor.py", line 329, in _with_call
    call = self._interceptor.intercept_unary_unary(

  File "/Users/janfiedler/Documents/Flyte/flytekit/flytekit/clients/grpc_utils/auth_interceptor.py", line 65, in intercept_unary_unary
    self._authenticator.refresh_credentials()

  File "/Users/janfiedler/Documents/Flyte/flytekit/flytekit/clients/auth/authenticator.py", line 164, in refresh_credentials
    self._creds = self._auth_client.get_creds_from_remote()

  File "/Users/janfiedler/Documents/Flyte/flytekit/flytekit/clients/auth/auth_client.py", line 377, in get_creds_from_remote
    server = self._create_callback_server()

  File "/Users/janfiedler/Documents/Flyte/flytekit/flytekit/clients/auth/auth_client.py", line 288, in _create_callback_server
    return OAuthHTTPServer(

  File "/Users/janfiedler/Documents/Flyte/flytekit/flytekit/clients/auth/auth_client.py", line 138, in __init__
    _BaseHTTPServer.HTTPServer.__init__(

  File "/opt/homebrew/anaconda3/envs/windows_auth/lib/python3.9/socketserver.py", line 452, in __init__
    self.server_bind()

  File "/opt/homebrew/anaconda3/envs/windows_auth/lib/python3.9/http/server.py", line 137, in server_bind
    socketserver.TCPServer.server_bind(self)

  File "/opt/homebrew/anaconda3/envs/windows_auth/lib/python3.9/socketserver.py", line 466, in server_bind
    self.socket.bind(self.server_address)

Windows:

(windows_auth) PS C:\Users\jan\Documents\union\union> pyflyte -c .\config.yaml get launchplan
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\multiprocessing\spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\multiprocessing\spawn.py", line 126, in _main
    self = reduction.pickle.load(from_parent)
EOFError: Ran out of input
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\multiprocessing\spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\multiprocessing\spawn.py", line 126, in _main
    self = reduction.pickle.load(from_parent)
EOFError: Ran out of input
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\multiprocessing\spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\multiprocessing\spawn.py", line 126, in _main
    self = reduction.pickle.load(from_parent)
EOFError: Ran out of input
Failed with Exception Code: SYSTEM:Unknown
Traceback:
  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\site-packages\grpc\_interceptor.py", line 315, in continuation
    response, call = self._thunk(new_method).with_call(

  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\site-packages\grpc\_interceptor.py", line 343, in with_call
    return self._with_call(

  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\site-packages\grpc\_interceptor.py", line 329, in _with_call
    call = self._interceptor.intercept_unary_unary(

  File "C:\Users\jan\Documents\union\union\flytekit\flytekit\clients\grpc_utils\auth_interceptor.py", line 65, in intercept_unary_unary
    self._authenticator.refresh_credentials()

  File "C:\Users\jan\Documents\union\union\flytekit\flytekit\clients\auth\authenticator.py", line 164, in refresh_credentials
    self._creds = self._auth_client.get_creds_from_remote()

  File "C:\Users\jan\Documents\union\union\flytekit\flytekit\clients\auth\auth_client.py", line 392, in get_creds_from_remote
    server_process.terminate()

  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\multiprocessing\process.py", line 133, in terminate
    self._popen.terminate()


Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\multiprocessing\spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "C:\Users\jan\miniconda3\envs\windows_auth\lib\multiprocessing\spawn.py", line 126, in _main
    self = reduction.pickle.load(from_parent)
EOFError: Ran out of input

I think we should stay with fork for every platform except Windows. The Err… flyteorg/flyte