support systemd notify and watchdog

src/capport/control/run.py

@@ -12,6 +12,8 @@ import capport.utils.cli
 import capport.utils.nft_set
 import trio
 from capport import cptypes
+from capport.utils.sd_notify import open_sdnotify
+
 
 _logger = logging.getLogger(__name__)
 
@@ -42,13 +44,16 @@ class ControlApp(capport.comm.hub.HubApplication):
 
 
 async def amain(config: capport.config.Config) -> None:
-    app = ControlApp()
-    hub = capport.comm.hub.Hub(config=config, app=app, is_controller=True)
-    app.hub = hub
-    async with trio.open_nursery() as nursery:
-        # hub.run loads the statefile from disk before signalling it was "started"
-        await nursery.start(hub.run)
-        app.apply_db_entries(hub.database.entries())
+    async with open_sdnotify() as sn:
+        app = ControlApp()
+        hub = capport.comm.hub.Hub(config=config, app=app, is_controller=True)
+        app.hub = hub
+        async with trio.open_nursery() as nursery:
+            # hub.run loads the statefile from disk before signalling it was "started"
+            await nursery.start(hub.run)
+            await sn.send('READY=1', 'STATUS=Deploying initial entries to nftables set')
+            app.apply_db_entries(hub.database.entries())
+            await sn.send('STATUS=Kernel fully synchronized')
 
 
 def main() -> None: