edit alertmanager

system-apps/monitoring/values.yaml

@@ -2,6 +2,11 @@ kube-prometheus-stack:
   alertmanager:
     config:
       route:
+        group_by: ['namespace']
+        group_wait: 30s
+        group_interval: 5m
+        repeat_interval: 12h
+        receiver: 'null'
         routes:
         - receiver: 'null'
         - receiver: "discord_webhook"