Watchdog: systemd sd_notify + async heartbeat alle 50s

homelab-ai-bot/telegram_bot.py

@@ -7,9 +7,31 @@ import os
 import fcntl
 import atexit
 import signal
+import socket as _socket
 
 sys.path.insert(0, os.path.dirname(__file__))
 
+
+def _sd_notify(msg: str):
+    """Systemd Notify ohne externe Abhaengigkeit."""
+    addr = os.environ.get("NOTIFY_SOCKET")
+    if not addr:
+        return
+    if addr[0] == "@":
+        addr = "\0" + addr[1:]
+    sock = _socket.socket(_socket.AF_UNIX, _socket.SOCK_DGRAM)
+    try:
+        sock.sendto(msg.encode(), addr)
+    finally:
+        sock.close()
+
+
+async def _watchdog_loop():
+    """Sendet alle 50s WATCHDOG=1 an systemd."""
+    while True:
+        _sd_notify("WATCHDOG=1")
+        await asyncio.sleep(50)
+
 PIDFILE = "/tmp/hausmeister-bot.pid"
 _lock_fp = None
 
@@ -735,6 +757,9 @@ def main():
     async def post_init(application):
         await application.bot.set_my_commands(BOT_COMMANDS)
         log.info("Kommandomenü registriert")
+        asyncio.create_task(_watchdog_loop())
+        _sd_notify("READY=1")
+        log.info("Systemd Watchdog aktiv (50s Intervall)")
 
     app.post_init = post_init
     log.info("Bot läuft — polling gestartet")