- Change manifests for Prometheus installation

- Change instructions for deploying Prometheus stack and Pushgateway
- Additional grouping to pushgateway to avoid overwriting of metrics in different pods / processes
- Bugfix to ensure good retrieval of css en js files in eveai_app

common/utils/business_event.py

@@ -559,12 +559,24 @@ class BusinessEvent:
             self._log_buffer = []
 
     def _push_to_gateway(self):
-        # Push metrics to the gateway
+        # Push metrics to the gateway with grouping key to avoid overwrites across pods/processes
         try:
+            # Determine grouping labels
+            pod_name = current_app.config.get('POD_NAME', current_app.config.get('COMPONENT_NAME', 'dev'))
+            pod_namespace = current_app.config.get('POD_NAMESPACE', current_app.config.get('FLASK_ENV', 'dev'))
+            worker_id = str(os.getpid())
+
+            grouping_key = {
+                'instance': pod_name,
+                'namespace': pod_namespace,
+                'process': worker_id,
+            }
+
             push_to_gateway(
                 current_app.config['PUSH_GATEWAY_URL'],
                 job=current_app.config['COMPONENT_NAME'],
-                registry=REGISTRY
+                registry=REGISTRY,
+                grouping_key=grouping_key,
             )
         except Exception as e:
             current_app.logger.error(f"Failed to push metrics to Prometheus Push Gateway: {e}")