counter dict

fence/__init__.py

@@ -275,11 +275,14 @@ def app_config(
 
     _setup_arborist_client(app)
     _setup_audit_service_client(app)
-    _setup_prometheus(app)
     _setup_data_endpoint_and_boto(app)
     _load_keys(app, root_dir)
     _set_authlib_cfgs(app)
 
+    app.prometheus_counters = {}
+    # TODO: if prometheus is disabled in config, do not setup
+    _setup_prometheus(app)
+
     app.storage_manager = StorageManager(config["STORAGE_CREDENTIALS"], logger=logger)
 
     app.debug = config["DEBUG"]
@@ -436,7 +439,7 @@ def _setup_prometheus(app):
     )
 
     # set up counters
-    app.pre_signed_url_req = Counter(
+    app.prometheus_counters["pre_signed_url_req"] = Counter(
         "pre_signed_url_req",
         "tracking presigned url requests",
         ["guid", "requested_protocol"],

fence/blueprints/data/indexd.py

@@ -80,7 +80,9 @@ def get_signed_url_for_file(action, file_id, file_name=None):
     )
 
     # increment counter for gen3-metrics
-    flask.current_app.pre_signed_url_req.labels(file_id, requested_protocol).inc()
+    counter = flask.current_app.prometheus_counters.get("pre_signed_url_req")
+    if counter:
+        counter.labels(file_id, requested_protocol).inc()
 
     if action == "download":  # for now only record download requests
         create_presigned_url_audit_log(