add terraform config files

terraform/eks-cluster.tf

@@ -0,0 +1,43 @@
+provider "kubernetes" {
+    load_config_file = "false"
+    host = data.aws_eks_cluster.myapp-cluster.endpoint
+    token = data.aws_eks_cluster_auth.myapp-cluster.token
+    cluster_ca_certificate = base64decode(data.aws_eks_cluster.myapp-cluster.certificate_authority.0.data)
+}
+
+data "aws_eks_cluster" "myapp-cluster" {
+    name = module.eks.cluster_id
+}
+
+data "aws_eks_cluster_auth" "myapp-cluster" {
+    name = module.eks.cluster_id
+}
+
+module "eks" {
+    source = "terraform-aws-modules/eks/aws"
+    version = "13.2.1"
+    
+    cluster_name = var.cluster_name
+    cluster_version = var.k8s_version
+
+    subnets = module.myapp-vpc.private_subnets
+    vpc_id = module.myapp-vpc.vpc_id
+
+    tags = {
+        environment = var.env_prefix
+        application = "myapp"
+    }
+    
+    worker_groups = [
+        {
+            instance_type = "t2.small"
+            name = "worker-group-1"
+            asg_desired_capacity = 2
+        },
+        {
+            instance_type = "t2.medium"
+            name = "worker-group-2"
+            asg_desired_capacity = 1
+        }
+    ]
+}