reformat cloudpath warning, add try except

Signed-off-by: Jack Luar <[email protected]>

Author: luarss

tools/AutoTuner/distributed/README.md

@@ -37,7 +37,6 @@ Currently, this setup supports GCP with batteries included. With configuration o
 alternative cloud providers could be used:
 - [Azure](https://docs.ray.io/en/latest/cluster/vms/user-guides/launching-clusters/azure.html)
 - [AWS](https://docs.ray.io/en/latest/cluster/vms/user-guides/launching-clusters/aws.html)
-- [vSphere](https://docs.ray.io/en/latest/cluster/vms/user-guides/launching-clusters/vsphere.html)
 
 ## Public cluster setup
 

tools/AutoTuner/src/autotuner/distributed.py

@@ -85,6 +85,7 @@
 from ray.util.queue import Queue
 
 from ax.service.ax_client import AxClient
+import warnings
 
 from autotuner.utils import (
     openroad,
@@ -504,12 +505,18 @@ def parse_arguments():
 
     # Validate cloud_dir if exist
     if args.cloud_dir:
-        _ = CloudPath(args.cloud_dir)
-        if not args.cloud_dir.startswith("gs://"):
+        try:
+            CloudPath(args.cloud_dir).exists()
+        except Exception as e:
             print(
-                f"[ERROR TUN-0030] Cloud storage directory {args.cloud_dir} is not supported."
+                f"[ERROR TUN-0007] Cloud storage directory {args.cloud_dir} does not exist or invalid IAM supplied."
             )
             sys.exit(1)
+        if not args.cloud_dir.startswith("gs://"):
+            warnings.warn(
+                f"Cloud storage directory {args.cloud_dir} is not supported. Please use gs://<bucket-name>.",
+                UserWarning,
+            )
 
     return args