Implemented ip change checking

ip_watchdog.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+from typing import Tuple
+import logging
+import socket
+
+from redis_super_storage import RedisSuperStorage
+
+
+class IPWatchdog:
+
+    def __init__(self, redis_store: RedisSuperStorage):
+        self._redis_store = redis_store
+        self._host_name = socket.gethostname()
+
+    def ip_changed(self) -> Tuple[bool, str]:
+        old_ip = self._redis_store.current_ip
+        current_ip = socket.gethostbyname(self._host_name)
+
+        if current_ip != old_ip:
+            logging.info(f'IP changed: {old_ip} -> {current_ip}')
+            self._redis_store.current_ip = current_ip
+            return True, current_ip
+
+        return False, old_ip