add the option to deploy k8s metrics server

config/metrics.tf

@@ -0,0 +1,20 @@
+resource "helm_release" "metrics_server" {
+  count = var.enable_metrics ? 1 : 0
+
+  name       = "metrics-server"
+  repository = "https://kubernetes-sigs.github.io/metrics-server/"
+  chart      = "metrics-server"
+  namespace  = "kube-system"
+  version    = var.metrics_server_version
+
+  set {
+    name  = "apiService.insecureSkipTLSVerify"
+    value = "true"
+  }
+
+  wait = true
+}
+
+output "metrics_server_metadata" {
+  value = var.enable_metrics ? helm_release.metrics_server[0].metadata : null
+}

config/terraform.tfvars

@@ -2,6 +2,7 @@ AWS_REGION       = "eu-west-2"
 environment      = "dev"
 domain_name      = {} # Pair of top level domain and hosted zone ID for deployed applications
 with_dmz_pods    = false
+enable_metrics   = false
 enable_karpenter = false
 enable_msk       = false
 enable_rds       = false

config/variables.tf

@@ -70,6 +70,11 @@ variable "instance_capacity_type" {
   }
 }
 
+variable "metrics_server_version" {
+  type    = string
+  default = "3.12.1"
+}
+
 variable "kafka_version" {
   type    = string
   default = "3.2.0"
@@ -100,6 +105,11 @@ variable "with_dmz_pods" {
   default     = false
 }
 
+variable "enable_metrics" {
+  type        = bool
+  description = "Do you need Metrics Server? [true, false]"
+}
+
 variable "enable_karpenter" {
   type        = bool
   description = "Do you need Karpenter? [true, false]"