fix: Add annatation to grafana ingress for iframe(#213)

clusters/core/addons/prometheus-operator/README.md

@@ -106,6 +106,7 @@ AWS Parameter Store structure:
 | kube-prometheus-stack.grafana.admin.userKey | string | `"username"` |  |
 | kube-prometheus-stack.grafana.envFromSecret | string | `"keycloak-client-grafana-secret"` |  |
 | kube-prometheus-stack.grafana.fullnameOverride | string | `"grafana"` |  |
+| kube-prometheus-stack.grafana.ingress.annotations."nginx.ingress.kubernetes.io/configuration-snippet" | string | `"more_set_headers X-Frame-Options: none;"` |  |
 | kube-prometheus-stack.grafana.ingress.enabled | bool | `true` |  |
 | kube-prometheus-stack.grafana.ingress.hosts[0] | string | `"grafana.example.com"` |  |
 | kube-prometheus-stack.grafana.ingress.pathType | string | `"ImplementationSpecific"` |  |

clusters/core/addons/prometheus-operator/values.yaml

@@ -101,6 +101,10 @@ kube-prometheus-stack:
 
     ingress:
       enabled: true
+      annotations:
+        # This annotation is intended to configure NGINX so that the X-Frame-Options header does not block
+        # embedding of the grafana web in an iframe.
+        nginx.ingress.kubernetes.io/configuration-snippet: "more_set_headers X-Frame-Options: none;"
       hosts:
         - grafana.example.com
       paths:
@@ -153,4 +157,4 @@ eso:
 # to support component functionality. This can be done using the provided add-ons or manually:
 # https://github.com/epam/edp-cluster-add-ons/tree/main/clusters/core/addons/kuberocketci-rbac
 oidc:
-  enabled: false
+  enabled: false