[UX] Optimizing error message when disabled cloud storage attempted

[landscapepainter]

This PR resolves #1831
When a Cloud Storage was set in the entrypoint yaml without enabling the cloud, Skypilot printed out long stack trace of error message. These messages are condensed into a simple message while removing the stack trace.

Before:

  ...
  File "/opt/conda/lib/python3.9/site-packages/sky/data/storage.py", line 1097, in __init__
    super().__init__(name, source, region, is_sky_managed)
  File "/opt/conda/lib/python3.9/site-packages/sky/data/storage.py", line 175, in __init__
    self.initialize()
  File "/opt/conda/lib/python3.9/site-packages/sky/data/storage.py", line 1129, in initialize
    self.client = gcp.storage_client()
  File "/opt/conda/lib/python3.9/site-packages/sky/adaptors/gcp.py", line 24, in wrapper
    return func(*args, **kwargs)
  File "/opt/conda/lib/python3.9/site-packages/sky/adaptors/gcp.py", line 47, in storage_client
    return storage.Client()
  File "/opt/conda/lib/python3.9/site-packages/google/cloud/storage/client.py", line 172, in __init__
    super(Client, self).__init__(
  File "/opt/conda/lib/python3.9/site-packages/google/cloud/client/__init__.py", line 320, in __init__
    _ClientProjectMixin.__init__(self, project=project, credentials=credentials)
  File "/opt/conda/lib/python3.9/site-packages/google/cloud/client/__init__.py", line 268, in __init__
    project = self._determine_default(project)
  File "/opt/conda/lib/python3.9/site-packages/google/cloud/client/__init__.py", line 287, in _determine_default
    return _determine_default_project(project)
  File "/opt/conda/lib/python3.9/site-packages/google/cloud/_helpers/__init__.py", line 152, in _determine_default_project
    _, project = google.auth.default()
  File "/opt/conda/lib/python3.9/site-packages/google/auth/_default.py", line 648, in default
    raise exceptions.DefaultCredentialsError(_CLOUD_SDK_MISSING_CREDENTIALS)
google.auth.exceptions.DefaultCredentialsError: Your default credentials were not found. To set up Application Default Credentials, see https://cloud.google.com/docs/authentication/external/set-up-adc for more information.

After:

Task from YAML spec: t.yaml
sky.exceptions.CloudDisabledError: Storage 'store:gcs' specified, but 'GCP' access is disabled. Enable 'GCP' to fix.

Before:

  ...
  File "/Users/zongheng/Dropbox/workspace/riselab/sky-computing/sky/data/storage.py", line 1479, in initialize
    self.client = data_utils.create_r2_client(self.region)
  ...
  File "/Users/zongheng/anaconda/envs/py37/lib/python3.7/site-packages/botocore/session.py", line 416, in get_scoped_config
    raise ProfileNotFound(profile=profile_name)
botocore.exceptions.ProfileNotFound: The config profile (r2) could not be found

After:

Task from YAML spec: test.yaml
sky.exceptions.CloudDisabledError: Storage 'store:r2' specified, but 'Cloudflare' access is disabled. Enable 'Cloudflare' to fix.

Tested (run the relevant ones):

• Tested with yaml that has gcs, r2, s3 store set up

[romilbhardwaj]

Thanks @landscapepainter! Left some comments.

[landscapepainter]

@romilbhardwaj Ready for another look :))

[romilbhardwaj]

Thanks @landscapepainter! Left some comments.

[romilbhardwaj]

Can we:

1. Update STORE_ENABLED_CLOUDS in storage.py to a) be a List[str] and b) Add cloudflare.NAME to this list?
2. Change this list comprehension to select only the clouds in STORE_ENABLED_CLOUDS?

Trying to minimize the number of places the list of storage enabled clouds needs to be maintained :)

[landscapepainter]

Updated.
Note the change I made in task.py/get_preferred_store_type() as STORE_ENABLED_CLOUDS is List[str] now.

[landscapepainter]

@romilbhardwaj Ready for another look!

[landscapepainter]

@romilbhardwaj Updated :)

[romilbhardwaj]

Thanks @landscapepainter! Should be good to go if test_smoke.py::TestStorageWithCredentials also passes.

[landscapepainter]

Thanks @landscapepainter! Should be good to go if test_smoke.py::TestStorageWithCredentials also passes.

Passing test_smoke.py::TestStorageWithCredentials :)