feat: add experimental support for checkpoint vLLM Dynamo Workers

components/src/dynamo/vllm/args.py

@@ -25,6 +25,10 @@
 # Global LMCache configuration - initialize once on module import
 ENABLE_LMCACHE = os.getenv("ENABLE_LMCACHE", "0").lower() in ("1", "true", "yes")
 
+# Global checkpoint configuration - initialize once on module import
+ENABLE_CHECKPOINTING = os.getenv("ENABLE_CHECKPOINTING", "0").lower() in ("1", "true", "yes")
+CHECKPOINT_DIR = os.getenv("CHECKPOINT_DIR", None)  # Optional: directory to restore from
+
 
 class Config:
     """Command line parameters or defaults"""

components/src/dynamo/vllm/checkpoint/__init__.py

@@ -0,0 +1,10 @@
+# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+"""Checkpoint/restore functionality for Dynamo."""
+
+from .checkpointable_async_llm import CheckpointableAsyncLLM
+from .metadata import CheckpointMetadata
+
+__all__ = ["CheckpointableAsyncLLM", "CheckpointMetadata"]
+