add statuses and alerts

exporter.py

@@ -1,20 +1,25 @@
 from prometheus_client import start_http_server, Summary, Gauge
-import paho.mqtt.publish as publish
 import paho.mqtt.client as mqtt
-import random
-import time
+import time, json, re
 from node_api import NodeAPI
 
 client_id = "exporter"
 topics = [
         ("$SYS/broker/clients/connected", 0),
-        ("$CONNECTED/#", 0)
+        ("$CONNECTED/#", 0),
+        ("+/alert", 0),
+        ("homelab/ats/supply/+", 0)
         ]
 
 node_api = NodeAPI()
 
 MQTT_CONNECTED = Gauge('mqtt_node_connected', 'MQTT node connection status', ['node', 'description'])
 MQTT_BROKER_CLIENTS = Gauge('mqtt_broker_clients', 'MQTT broker clients connected')
+MQTT_ALERT = Gauge('mqtt_alert_state', 'MQTT alert topic states', ['origin', 'alert'])
+MQTT_STATUS = Gauge('mqtt_status', 'MQTT status topic', ['status'])
+
+def on_log(client, userdata, level, buff):
+    print(buff)
 
 def on_connect(client, userdata, flags, rc):
     print("Connected with result code " + str(rc))
@@ -36,17 +41,28 @@ def on_message(client, userdata, msg):
     if topic[0] == "$CONNECTED":
         MQTT_CONNECTED.labels(topic[1], node_api.get(topic[1])).set(int(msg.payload))
 
-    if msg.topic == "$SYS/broker/clients/connected":
+    elif msg.topic == "$SYS/broker/clients/connected":
         MQTT_BROKER_CLIENTS.set(int(msg.payload))
 
-    print(msg.topic, int(msg.payload))
+    elif topic[1] == "alert":
+        for alert, state in json.loads(msg.payload).items():
+            MQTT_ALERT.labels(topic[0], alert).set(int(state))
 
+    elif re.match("homelab/ats/supply/src[12]", msg.topic):
+        MQTT_STATUS.labels('ats_preferred_' + topic[3]).set(json.loads(msg.payload)['preferred'])
+
+    try:
+        my_json = json.loads(msg.payload)
+        print(msg.topic, json.dumps(my_json, indent=4, sort_keys=True))
+    except ValueError as e:
+        print(msg.topic, msg.payload)
 
 client = mqtt.Client(client_id)
 
 client.on_connect = on_connect
 #client.on_disconnect = on_disconnect
 client.on_message = on_message
+#client.on_log = on_log
 client.will_set("$CONNECTED/"+client_id, 0, qos=0, retain=True)
 client.connect('localhost')
 client.loop_start()