Update signals.

src/snek/app.py

@@ -3,6 +3,7 @@ import logging
 import pathlib
 import ssl
 import uuid
+import signal
 from datetime import datetime
 
 from snek import snode
@@ -210,6 +211,10 @@ class Application(BaseApplication):
         # app.loop = asyncio.get_running_loop()
         app.executor = ThreadPoolExecutor(max_workers=200)
         app.loop.set_default_executor(self.executor)
+        for sig in (signal.SIGINT, signal.SIGTERM):
+            app.loop.add_signal_handler(
+                sig, lambda: asyncio.create_task(self.services.container.shutdown())
+            )
 
     async def create_task(self, task):
         await self.tasks.put(task)

src/snek/service/container.py

@@ -12,6 +12,9 @@ class ContainerService(BaseService):
         self.compose = ComposeFileManager(self.compose_path,self.container_event_handler)
         self.event_listeners = {}
 
+    async def shutdown(self):
+        return await self.compose.shutdown()
+
     async def add_event_listener(self, name, event,event_handler):
         if not name in self.event_listeners:
             self.event_listeners[name] = {}

src/snek/system/docker.py

@@ -17,6 +17,17 @@ class ComposeFileManager:
         self.running_instances = {}
         self.event_handler = event_handler 
 
+    async def shutdown(self):
+        print("Stopping all sessions")
+        for name in self.list_instances():
+            proc = self.running_instances.get(name)
+            if not proc:
+                continue
+            if proc['proc'].returncode == None:
+                print("Stopping",name)
+                await proc['proc'].stop()
+                print("Stopped",name,"gracefully")
+
     def _load(self):
         try:
             with open(self.compose_path) as f: