forgot to update db lag

check_matrix_synapse.py

@@ -120,6 +120,11 @@ def main():
         db_lag_MAX = 0.01 if not args.crit else args.crit  # in seconds
         try:
             db_lag, null_present, raw_data = get_waiting_for_db(args.grafana_api_key, args.interval, args.range, args.grafana_server)
+            if db_lag == None:
+                print(f"UNKNOWN: no data for DB lag")
+                sys.exit(nagios.UNKNOWN)
+
+
             null_warn = f'Null data was present for this timeseries, value may be incorrect.\n{raw_data}' if null_present else ''
             if db_lag > db_lag_MAX:
                 print(f"CRITICAL: DB lag is {db_lag} sec. {null_warn} |'db-lag'={db_lag}s;;;")

checker/synapse_grafana.py

@@ -279,6 +279,8 @@ def get_waiting_for_db(api_key, interval, data_range, endpoint):
         'to': 'now',
     }
     response = requests.post(f'{endpoint}/api/ds/query', headers={'Authorization': f'Bearer {api_key}'}, json=json_data, verify=False).json()
+    if not len(response['results']['A']['frames']):
+        return None, None, None
     raw_data = response['results']['A']['frames'][0]['data']['values'][1]
     data = []
     null_present = False