UN-2609 Added graceful shutdown support for tool containers with signal handling and configurable timeout (#194)

* sigtyerm on tool

* small refactoring

* PR review

* upgrading version

Author: kirtimanmishrazipstack

src/unstract/sdk/__init__.py

@@ -1,4 +1,4 @@
-__version__ = "v0.75.0"
+__version__ = "v0.76.0"
 
 
 def get_sdk_version() -> str:

src/unstract/sdk/tool/entrypoint.py

@@ -1,11 +1,23 @@
+import logging
+import signal
+from typing import Any
+
 from unstract.sdk.tool.base import BaseTool
 from unstract.sdk.tool.executor import ToolExecutor
 from unstract.sdk.tool.parser import ToolArgsParser
 
+logger = logging.getLogger(__name__)
 
 class ToolEntrypoint:
     """Class that contains methods for the entrypoint for a tool."""
 
+    @staticmethod
+    def _signal_handler(signum: int, frame: Any) -> None:
+        """Handle SIGTERM and SIGINT signals."""
+        sig = signal.Signals(signum)
+        signal_name = sig.name
+        logger.info("Received %s signal", signal_name)
+
     @staticmethod
     def launch(tool: BaseTool, args: list[str]) -> None:
         """Entrypoint function for a tool.
@@ -17,6 +29,10 @@ def launch(tool: BaseTool, args: list[str]) -> None:
             tool (AbstractTool): Tool to execute
             args (List[str]): Arguments passed to a tool
         """
+        # Register signal handlers for graceful shutdown
+        signal.signal(signal.SIGTERM, ToolEntrypoint._signal_handler)
+        signal.signal(signal.SIGINT, ToolEntrypoint._signal_handler)
+        
         parsed_args = ToolArgsParser.parse_args(args)
         executor = ToolExecutor(tool=tool)
         executor.execute(parsed_args)