feat(docker): make standard-supervisor optional via entrypoint script

Add configurable entrypoint.sh that allows toggling standard-supervisor
usage via VLLM_USE_STANDARD_SUPERVISOR environment variable.

- Default: direct vllm serve execution (standard-supervisor disabled)
- Set VLLM_USE_STANDARD_SUPERVISOR=true to enable standard-supervisor

Signed-off-by: Shen Teng <[email protected]>

Author: HappyAmazonian

docker/Dockerfile

@@ -593,5 +593,8 @@ ENTRYPOINT ["./sagemaker-entrypoint.sh"]
 
 FROM vllm-openai-base AS vllm-openai
 
-ENTRYPOINT ["standard-supervisor", "vllm", "serve"]
+COPY docker/entrypoint.sh .
+RUN chmod +x entrypoint.sh
+
+ENTRYPOINT ["./entrypoint.sh"]
 #################### OPENAI API SERVER ####################

docker/entrypoint.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+set -e
+
+# Standard-supervisor from github.com/aws/model-hosting-container-standards provides features like:
+# - Process supervision and automatic restart
+# - ENV variable to CLI argument conversion (VLLM_ARG_* -> --arg)
+# - Graceful shutdown handling
+#
+# Control standard-supervisor usage with VLLM_USE_STANDARD_SUPERVISOR:
+# - "false" (default): Direct execution without standard-supervisor
+# - "true": Enable all standard-supervisor features
+# - Future: Could support selective feature flags like "env-conversion-only"
+
+VLLM_USE_STANDARD_SUPERVISOR="${VLLM_USE_STANDARD_SUPERVISOR:-false}"
+
+if [ "$VLLM_USE_STANDARD_SUPERVISOR" = "true" ]; then
+    # Use standard-supervisor launcher with all features
+    exec standard-supervisor vllm serve "$@"
+else
+    # Direct execution without standard-supervisor
+    exec vllm serve "$@"
+fi