Allows setting the hubble.metrics.enabled value in Cilium Helm chart

kube.tf.example

@@ -690,6 +690,11 @@ module "kube-hetzner" {
   # Enables Hubble Observability to collect and visualize network traffic. Default: false
   # cilium_hubble_enabled = true
 
+  # Configures the list of Hubble metrics to collect.
+  # cilium_hubble_metrics_enabled = [
+  #   "policy:sourceContext=app|workload-name|pod|reserved-identity;destinationContext=app|workload-name|pod|dns|reserved-identity;labelsContext=source_namespace,destination_namespace"
+  # ]
+
   # You can choose the version of Calico that you want. By default, the latest is used.
   # More info on available versions can be found at https://github.com/projectcalico/calico/releases
   # Please note that if you are getting 403s from Github, it's also useful to set the version manually. However there is rarely a need for that!

locals.tf

@@ -487,6 +487,11 @@ hubble:
     enabled: true
   ui:
     enabled: true
+  metrics:
+    enabled:
+%{for metric in var.cilium_hubble_metrics_enabled~}
+      - "${metric}"
+%{endfor~}
 %{endif~}
 
 MTU: 1450

variables.tf

@@ -607,6 +607,12 @@ variable "cilium_hubble_enabled" {
   description = "Enables Hubble Observability to collect and visualize network traffic."
 }
 
+variable "cilium_hubble_metrics_enabled" {
+  type        = list(string)
+  default     = []
+  description = "Configures the list of Hubble metrics to collect"
+}
+
 variable "cilium_ipv4_native_routing_cidr" {
   type        = string
   default     = null