fix: add DS_LOKI var

cluster/components/networking/ingress-nginx/dashboard/kustomization.yaml

@@ -1,12 +1,13 @@
 ---
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
-resources:
-  - nginx-log-dashboard.yaml
 configMapGenerator:
   - name: nginx-dashboard
     files:
       - nginx-dashboard.json=https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/grafana/dashboards/nginx.json
+  - name: nginx-log-dashboard
+    files:
+      - nginx-log-dashboard.json
   - name: nginx-request-handling-performance-dashboard
     files:
       - nginx-request-handling-performance-dashboard.json=https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/grafana/dashboards/request-handling-performance.json

cluster/components/observability/grafana/values.yaml

@@ -14,6 +14,7 @@ env:
   # GF_SECURITY_ALLOW_EMBEDDING: true
   GF_SECURITY_COOKIE_SAMESITE: grafana
   DS_PROMETHEUS: Prometheus
+  DS_LOKI: loki
 admin:
   # TODO use convention for credentials secrets ?
   existingSecret: grafana.admin.creds