[Feature] Add Azure Blob Storage support for RunAI Model Streamer (#34614)

Signed-off-by: hasethuraman <hsethuraman@microsoft.com>

docker/Dockerfile

@@ -620,7 +620,7 @@ RUN set -eux; \
 ARG BITSANDBYTES_VERSION_X86=0.46.1
 ARG BITSANDBYTES_VERSION_ARM64=0.42.0
 ARG TIMM_VERSION=">=1.0.17"
-ARG RUNAI_MODEL_STREAMER_VERSION=">=0.15.3"
+ARG RUNAI_MODEL_STREAMER_VERSION=">=0.15.7"
 RUN --mount=type=cache,target=/root/.cache/uv \
     if [ "$TARGETPLATFORM" = "linux/arm64" ]; then \
         BITSANDBYTES_VERSION="${BITSANDBYTES_VERSION_ARM64}"; \
@@ -628,7 +628,7 @@ RUN --mount=type=cache,target=/root/.cache/uv \
         BITSANDBYTES_VERSION="${BITSANDBYTES_VERSION_X86}"; \
     fi; \
     uv pip install --system accelerate hf_transfer modelscope \
-        "bitsandbytes>=${BITSANDBYTES_VERSION}" "timm${TIMM_VERSION}" "runai-model-streamer[s3,gcs]${RUNAI_MODEL_STREAMER_VERSION}"
+        "bitsandbytes>=${BITSANDBYTES_VERSION}" "timm${TIMM_VERSION}" "runai-model-streamer[s3,gcs,azure]${RUNAI_MODEL_STREAMER_VERSION}"
 
 # ============================================================
 # VLLM INSTALLATION (depends on build stage)

docker/versions.json

@@ -83,7 +83,7 @@
       "default": ">=1.0.17"
     },
     "RUNAI_MODEL_STREAMER_VERSION": {
-      "default": ">=0.15.3"
+      "default": ">=0.15.7"
     }
   }
 }

docs/models/extensions/runai_model_streamer.md

@@ -31,6 +31,16 @@ vllm serve gs://core-llm/Llama-3-8b \
     --load-format runai_streamer
 ```
 
+To run model from Azure Blob Storage run:
+
+```bash
+AZURE_STORAGE_ACCOUNT_NAME=<account> \
+vllm serve az://<container>/<model-path> \
+    --load-format runai_streamer
+```
+
+Authentication uses `DefaultAzureCredential`, which supports `az login`, managed identity, environment variables (`AZURE_CLIENT_ID`, `AZURE_TENANT_ID`, `AZURE_CLIENT_SECRET`), and other methods.
+
 To run model from a S3 compatible object store run:
 
 ```bash

requirements/nightly_torch_test.txt

@@ -42,7 +42,7 @@ tritonclient>=2.51.0
 
 numba == 0.61.2 # Required for N-gram speculative decoding
 numpy
-runai-model-streamer[s3,gcs]==0.15.3
+runai-model-streamer[s3,gcs,azure]==0.15.7
 fastsafetensors>=0.2.2
 instanttensor>=0.1.5
 pydantic>=2.12 # 2.11 leads to error on python 3.13

requirements/rocm.txt

@@ -15,7 +15,7 @@ tensorizer==2.10.1
 packaging>=24.2
 setuptools>=77.0.3,<80.0.0
 setuptools-scm>=8
-runai-model-streamer[s3,gcs]==0.15.3
+runai-model-streamer[s3,gcs,azure]==0.15.7
 conch-triton-kernels==1.2.1
 timm>=1.0.17
 # amd-quark: required for Quark quantization on ROCm 

requirements/test.in

@@ -56,7 +56,7 @@ grpcio-reflection==1.78.0
 arctic-inference == 0.1.1 # Required for suffix decoding test
 numba == 0.61.2 # Required for N-gram speculative decoding
 numpy
-runai-model-streamer[s3,gcs]==0.15.3
+runai-model-streamer[s3,gcs,azure]==0.15.7
 fastsafetensors>=0.2.2 # 0.2.2 contains important fixes for multi-GPU mem usage
 instanttensor>=0.1.5
 pydantic>=2.12 # 2.11 leads to error on python 3.13

requirements/test.txt

@@ -64,6 +64,14 @@ audioread==3.0.1
     # via librosa
 av==16.1.0
     # via -r requirements/test.in
+azure-core==1.38.2
+    # via
+    #   azure-identity
+    #   azure-storage-blob
+azure-identity==1.25.2
+    # via runai-model-streamer-azure
+azure-storage-blob==12.28.0
+    # via runai-model-streamer-azure
 backoff==2.2.1
     # via
     #   -r requirements/test.in
@@ -103,8 +111,10 @@ certifi==2024.8.30
     #   rasterio
     #   requests
     #   sentry-sdk
-cffi==1.17.1
-    # via soundfile
+cffi==2.0.0
+    # via
+    #   cryptography
+    #   soundfile
 chardet==5.2.0
     # via mbstrdecoder
 charset-normalizer==3.4.0
@@ -148,6 +158,12 @@ coverage==7.10.6
     # via pytest-cov
 cramjam==2.9.0
     # via fastparquet
+cryptography==46.0.5
+    # via
+    #   azure-identity
+    #   azure-storage-blob
+    #   msal
+    #   pyjwt
 cuda-bindings==12.9.4
     # via torch
 cuda-pathfinder==1.3.3
@@ -379,6 +395,8 @@ iniconfig==2.0.0
     # via pytest
 instanttensor==0.1.5
     # via -r requirements/test.in
+isodate==0.7.2
+    # via azure-storage-blob
 isoduration==20.11.0
     # via jsonschema
 isort==5.13.2
@@ -492,6 +510,12 @@ more-itertools==10.5.0
     # via lm-eval
 mpmath==1.3.0
     # via sympy
+msal==1.34.0
+    # via
+    #   azure-identity
+    #   msal-extensions
+msal-extensions==1.3.1
+    # via azure-identity
 msgpack==1.1.0
     # via
     #   librosa
@@ -828,6 +852,8 @@ pydantic-extra-types==2.10.5
     # via mistral-common
 pygments==2.18.0
     # via rich
+pyjwt==2.11.0
+    # via msal
 pyogrio==0.11.0
     # via geopandas
 pyparsing==3.2.0
@@ -945,6 +971,7 @@ regex==2024.9.11
     #   transformers
 requests==2.32.3
     # via
+    #   azure-core
     #   buildkite-test-collector
     #   datasets
     #   diffusers
@@ -957,6 +984,7 @@ requests==2.32.3
     #   lightly
     #   lm-eval
     #   mistral-common
+    #   msal
     #   mteb
     #   pooch
     #   ray
@@ -993,11 +1021,13 @@ rsa==4.9.1
     # via google-auth
 rtree==1.4.0
     # via torchgeo
-runai-model-streamer==0.15.3
+runai-model-streamer==0.15.7
     # via -r requirements/test.in
-runai-model-streamer-gcs==0.15.3
+runai-model-streamer-azure==0.15.7
     # via runai-model-streamer
-runai-model-streamer-s3==0.15.3
+runai-model-streamer-gcs==0.15.7
+    # via runai-model-streamer
+runai-model-streamer-s3==0.15.7
     # via runai-model-streamer
 s3transfer==0.10.3
     # via boto3
@@ -1266,6 +1296,9 @@ typing-extensions==4.15.0
     #   aiosignal
     #   albumentations
     #   alembic
+    #   azure-core
+    #   azure-identity
+    #   azure-storage-blob
     #   chz
     #   fastapi
     #   grpcio

setup.py

@@ -970,7 +970,7 @@ setup(
         "tensorizer": ["tensorizer==2.10.1"],
         "fastsafetensors": ["fastsafetensors >= 0.2.2"],
         "instanttensor": ["instanttensor >= 0.1.5"],
-        "runai": ["runai-model-streamer[s3,gcs] >= 0.15.3"],
+        "runai": ["runai-model-streamer[s3,gcs,azure] >= 0.15.7"],
         "audio": [
             "librosa",
             "scipy",

tests/model_executor/model_loader/runai_streamer_loader/test_runai_utils.py

@@ -19,6 +19,7 @@ from vllm.transformers_utils.runai_utils import (
 def test_is_runai_obj_uri():
     assert is_runai_obj_uri("gs://some-gcs-bucket/path")
     assert is_runai_obj_uri("s3://some-s3-bucket/path")
+    assert is_runai_obj_uri("az://some-azure-container/path")
     assert not is_runai_obj_uri("nfs://some-nfs-path")
 
 

tests/transformers_utils/test_utils.py

@@ -11,6 +11,7 @@ from vllm.transformers_utils.gguf_utils import (
     split_remote_gguf,
 )
 from vllm.transformers_utils.utils import (
+    is_azure,
     is_cloud_storage,
     is_gcs,
     is_s3,
@@ -31,9 +32,17 @@ def test_is_s3():
     assert not is_s3("nfs://nfs-fqdn.local")
 
 
+def test_is_azure():
+    assert is_azure("az://model-container/path")
+    assert not is_azure("s3://model-path/path-to-model")
+    assert not is_azure("/unix/local/path")
+    assert not is_azure("nfs://nfs-fqdn.local")
+
+
 def test_is_cloud_storage():
     assert is_cloud_storage("gs://model-path")
     assert is_cloud_storage("s3://model-path/path-to-model")
+    assert is_cloud_storage("az://model-container/path")
     assert not is_cloud_storage("/unix/local/path")
     assert not is_cloud_storage("nfs://nfs-fqdn.local")
 

vllm/config/vllm.py

@@ -1574,8 +1574,9 @@ class VllmConfig:
                 "runai_streamer_sharded",
             ):
                 raise ValueError(
-                    f"To load a model from S3, 'load_format' "
-                    f"must be 'runai_streamer' or 'runai_streamer_sharded', "
+                    f"To load a model from object storage (S3/GCS/Azure), "
+                    f"'load_format' must be 'runai_streamer' or "
+                    f"'runai_streamer_sharded', "
                     f"but got '{self.load_config.load_format}'. "
                     f"Model: {self.model_config.model}"
                 )

vllm/model_executor/model_loader/runai_streamer_loader.py

@@ -21,7 +21,7 @@ from vllm.transformers_utils.runai_utils import is_runai_obj_uri, list_safetenso
 class RunaiModelStreamerLoader(BaseModelLoader):
     """
     Model loader that can load safetensors
-    files from local FS or S3 bucket.
+    files from local FS, S3, GCS, or Azure Blob Storage.
     """
 
     def __init__(self, load_config: LoadConfig):

vllm/transformers_utils/runai_utils.py

@@ -13,7 +13,7 @@ from vllm.utils.import_utils import PlaceholderModule
 
 logger = init_logger(__name__)
 
-SUPPORTED_SCHEMES = ["s3://", "gs://"]
+SUPPORTED_SCHEMES = ["s3://", "gs://", "az://"]
 
 try:
     from runai_model_streamer import list_safetensors as runai_list_safetensors

vllm/transformers_utils/utils.py

@@ -23,8 +23,12 @@ def is_gcs(model_or_path: str) -> bool:
     return model_or_path.lower().startswith("gs://")
 
 
+def is_azure(model_or_path: str) -> bool:
+    return model_or_path.lower().startswith("az://")
+
+
 def is_cloud_storage(model_or_path: str) -> bool:
-    return is_s3(model_or_path) or is_gcs(model_or_path)
+    return is_s3(model_or_path) or is_gcs(model_or_path) or is_azure(model_or_path)
 
 
 def without_trust_remote_code(kwargs: dict[str, Any]) -> dict[str, Any]: