FEAT(grafana): export dashboards

- to JSON and use sidecar ConfigMaps
- Export 14 dashboards to JSON files
- Use kustomize configMapGenerator for dashboard ConfigMaps
- Enable Grafana sidecar to load dashboards from ConfigMaps
- Keep Longhorn and Traefik Official from grafana.com

grafana/helm-values.yaml

@@ -54,6 +54,18 @@ datasources:
       jsonData:
         implementation: prometheus
 
+# Sidecar for dashboard ConfigMaps
+sidecar:
+  dashboards:
+    enabled: true
+    label: grafana_dashboard
+    labelValue: "1"
+    searchNamespace: grafana
+    folderAnnotation: grafana_folder
+    provider:
+      foldersFromFilesStructure: false
+
+# Dashboards from grafana.com (only those not in ConfigMaps)
 dashboardProviders:
   dashboardproviders.yaml:
     apiVersion: 1
@@ -69,49 +81,13 @@ dashboardProviders:
 
 dashboards:
   default:
-    # Node Exporter Full - 노드 상세 메트릭
-    node-exporter-full:
-      gnetId: 1860
-      revision: 37
-      datasource: Prometheus
-    # Kubernetes Namespaces
-    kubernetes-views-namespaces:
-      gnetId: 15758
-      revision: 35
-      datasource: Prometheus
-    # Kubernetes Pods
-    kubernetes-views-pods:
-      gnetId: 15761
-      revision: 28
-      datasource: Prometheus
-    # ArgoCD
-    argocd:
-      gnetId: 14584
-      revision: 1
-      datasource: Prometheus
-    # Loki Logs
-    loki-logs:
-      gnetId: 13639
-      revision: 2
-      datasource: Loki
     # Longhorn Storage
     longhorn:
       gnetId: 16888
       revision: 9
       datasource: Prometheus
-    # MinIO - 수동 import 사용 (변수 자동 매핑 필요)
-    # Cert-Manager
-    cert-manager:
-      gnetId: 11001
-      revision: 1
-      datasource: Prometheus
-    # CoreDNS
-    coredns:
-      gnetId: 14981
-      revision: 2
-      datasource: Prometheus
-    # Traefik
-    traefik:
+    # Traefik Official
+    traefik-official:
       gnetId: 17346
       revision: 9
       datasource: Prometheus