Simulator: use localhost for MQTT brokers (fix DNS resolution)

simulator.py

@@ -4,11 +4,13 @@ Smart City IoT Simulator — Martinique (14.6°N, 61.2°W)
 =======================================================
 Publie vers MULTIPLES brokers MQTT + context brokers NGSI-LD.
 
-Brokers MQTT:
-  - EMQX:       emqx_emqx_1:1883        (sans auth)
-  - Mosquitto:  mosquitto-traefik:1883  (bunker/bunker)
-  - BunkerM:    bunkerm_bunkerm_1:1900  (TLS, bunker/bunker)
-  - OpenRemote: openremote-manager-1:1883 (admin/Digitribe972)
+# Brokers MQTT (utiliser localhost avec ports exposés)
+EMQX_HOST = os.environ.get("EMQX_HOST", "localhost")
+EMQX_PORT = int(os.environ.get("EMQX_PORT", "11883"))
+MOSQUITTO_HOST = os.environ.get("MOSQUITTO_HOST", "localhost")
+MOSQUITTO_PORT = int(os.environ.get("MOSQUITTO_PORT", "1883"))
+BUNKERM_HOST = os.environ.get("BUNKERM_HOST", "mqtt.digitribe.fr")
+BUNKERM_PORT = int(os.environ.get("BUNKERM_PORT", "1900"))
 
 Context Brokers REST:
   - Orion-LD:   fiware-gis-quickstart-orion-1:1026  (NGSI-LD)
@@ -394,11 +396,10 @@ class MultiMQTT:
             print(f"[MQTT]   ⚠️  {name} déconnecté")
 
     def _setup(self):
-        # Garder que EMQX et Mosquitto (MQTT fonctionnels)
-        # BunkerM via HTTP API (port 2000) au lieu de MQTT/TLS
+        # Utiliser les variables d'environnement pour les brokers
         brokers = [
-            ("EMQX",      "emqx_emqx_1",             1883, False, "",       ""),
-            ("Mosquitto", "mosquitto-traefik",         1883, False, "bunker",  "bunker"),
+            ("EMQX",      EMQX_HOST,             EMQX_PORT, False, "",       ""),
+            ("Mosquitto", MOSQUITTO_HOST,         MOSQUITTO_PORT, False, "bunker", "bunker"),
         ]
         print("[MQTT] 🔌 Connexion aux brokers...")
         for name, host, port, tls, user, pwd in brokers: