[Terraform-AWS] Replace CLB with NLB (#8578)

contrib/terraform/aws/modules/nlb/main.tf

@@ -0,0 +1,41 @@
+# Create a new AWS NLB for K8S API
+resource "aws_lb" "aws-nlb-api" {
+  name                             = "kubernetes-nlb-${var.aws_cluster_name}"
+  load_balancer_type               = "network"
+  subnets                          = length(var.aws_subnet_ids_public) <= length(var.aws_avail_zones) ? var.aws_subnet_ids_public : slice(var.aws_subnet_ids_public, 0, length(var.aws_avail_zones))
+  idle_timeout                     = 400
+  enable_cross_zone_load_balancing = true
+
+  tags = merge(var.default_tags, tomap({
+    Name = "kubernetes-${var.aws_cluster_name}-nlb-api"
+  }))
+}
+
+# Create a new AWS NLB Instance Target Group
+resource "aws_lb_target_group" "aws-nlb-api-tg" {
+  name        = "kubernetes-nlb-tg-${var.aws_cluster_name}"
+  port        = var.k8s_secure_api_port
+  protocol    = "TCP"
+  target_type = "ip"
+  vpc_id      = var.aws_vpc_id
+
+  health_check {
+    healthy_threshold   = 2
+    unhealthy_threshold = 2
+    interval            = 30
+    protocol            = "HTTPS"
+    path                = "/healthz"
+  }
+}
+
+# Create a new AWS NLB Listener listen to target group
+resource "aws_lb_listener" "aws-nlb-api-listener" {
+  load_balancer_arn = aws_lb.aws-nlb-api.arn
+  port              = var.aws_nlb_api_port
+  protocol          = "TCP"
+
+  default_action {
+    type             = "forward"
+    target_group_arn = aws_lb_target_group.aws-nlb-api-tg.arn
+  }
+}