Support Influx without authentication

main.py

@@ -26,8 +26,8 @@ def influxb_connect(config):
     :returns: InfluxDBClient object
     """
     # Check configuration file
-    if 'url' not in config and 'user' not in config and 'password' not in config and 'database' not in config:
-        print('You need to add influxdb URL, user, password and database to configuration file.')
+    if 'url' not in config and 'database' not in config:
+        print('You need to add influxdb URL and database to configuration file.')
         sys.exit(1)
 
     # Parse influx connection string
@@ -49,15 +49,26 @@ def influxb_connect(config):
 
     # Connect to influx db
     try:
-        client = InfluxDBClient(
-            host=o.hostname,
-            port=port,
-            username=config['user'],
-            password=config['password'],
-            database=config['database'],
-            ssl=ssl,
-            verify_ssl=verify
-        )
+        if 'user' in config and 'password' in config:
+            # Influx authentication enabled
+            client = InfluxDBClient(
+                host=o.hostname,
+                port=port,
+                username=config['user'],
+                password=config['password'],
+                database=config['database'],
+                ssl=ssl,
+                verify_ssl=verify
+            )
+        else:
+            # Influx authentication disabled
+            client = InfluxDBClient(
+                host=o.hostname,
+                port=port,
+                database=config['database'],
+                ssl=ssl,
+                verify_ssl=verify
+            )
         client.ping()
         return client
     except Exception as e: