fix: disable Grafana Live to prevent port-forward timeouts (#49)

Disable Grafana Live feature (max_connections=0) to prevent WebSocket
connection buildup that causes kubectl port-forward timeout errors.
Firefox was creating multiple persistent connections that exhausted
the port-forward stream multiplexer. This caused grafana to quickly
become unresponsive in the browser. Disabling Grafana Live fixes
the issue.

Docs:
https://grafana.com/docs/grafana/latest/setup-grafana/configure-grafana/#live

Signed-off-by: Jeremy Schneider <[email protected]>
Signed-off-by: Marco Nenciarini <[email protected]>
Co-authored-by: Marco Nenciarini <[email protected]>

Author: ardentperf

monitoring/README.md

@@ -60,6 +60,12 @@ You can find the dashboard under `Home > Dashboards > grafana > CloudNativePG`.
 
 ![dashboard](image.png)
 
+> **Note:** Grafana Live is disabled (`max_connections: 0`) to prevent
+> WebSocket connection buildup that can exhaust kubectl port-forward
+> streams and cause timeout errors. This means real-time dashboard
+> streaming is unavailable, but all other Grafana features work normally
+> when accessed via port-forward.
+
 ## PodMonitor
 
 To enable Prometheus to scrape metrics from your PostgreSQL pods, you must

monitoring/grafana/grafana_instance.yaml

@@ -11,6 +11,8 @@ spec:
     security:
       admin_user: admin
       admin_password: admin
+    live:
+      max_connections: "0"
   deployment:
     spec:
       template: