fix: Spartan kubernetes cluster IaC

spartan/terraform/eks-cluster/main.tf

@@ -0,0 +1,114 @@
+terraform {
+  backend "s3" {
+    bucket         = "aztec-terraform"
+    key            = "spartan/terraform.tfstate"
+    region         = "eu-west-2"
+  }
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "5.47.0"
+    }
+  }
+}
+
+provider "aws" {
+  region = var.region
+}
+
+# Filter out local zones, which are not currently supported
+# with managed node groups
+data "aws_availability_zones" "available" {
+  filter {
+    name   = "opt-in-status"
+    values = ["opt-in-not-required"]
+  }
+}
+
+module "vpc" {
+  source  = "terraform-aws-modules/vpc/aws"
+  version = "5.8.1"
+
+  name = var.cluster_name
+  cidr = "10.1.0.0/16"
+
+  azs  = slice(data.aws_availability_zones.available.names, 0, 3)
+  private_subnets  = ["10.1.1.0/24", "10.1.2.0/24"]
+  public_subnets = ["10.1.3.0/24", "10.1.4.0/24"]
+
+  enable_nat_gateway   = true
+  single_nat_gateway   = true
+  enable_dns_hostnames = true
+  enable_vpn_gateway = true
+
+  public_subnet_tags = {
+    "kubernetes.io/role/elb" = 1
+  }
+
+  private_subnet_tags = {
+    "kubernetes.io/role/internal-elb" = 1
+  }
+
+  tags = {
+    Project     = var.cluster_name
+  }
+}
+
+# EKS Module
+module "eks" {
+  source  = "terraform-aws-modules/eks/aws"
+  version = "20.8.5"
+
+  cluster_name    = var.cluster_name
+  cluster_version = "1.31"
+
+  cluster_endpoint_public_access           = true
+  enable_cluster_creator_admin_permissions = true
+
+  cluster_addons = {
+    aws-ebs-csi-driver = {
+      service_account_role_arn = module.irsa-ebs-csi.iam_role_arn
+    }
+  }
+
+  # VPC and Subnets
+  vpc_id     = module.vpc.vpc_id
+  subnet_ids = module.vpc.private_subnets
+
+  # EKS Managed Node Group(s)
+  eks_managed_node_group_defaults = {
+    ami_type = "AL2_x86_64"
+  }
+
+  eks_managed_node_groups = {
+    default = {
+      name = "node-group-1"
+      instance_types = ["m6a.2xlarge"]
+
+      min_size     = 1
+      max_size     = 2
+      desired_size = 1
+    }
+  }
+
+  tags = {
+    Project     = var.cluster_name
+  }
+}
+
+# https://aws.amazon.com/blogs/containers/amazon-ebs-csi-driver-is-now-generally-available-in-amazon-eks-add-ons/
+data "aws_iam_policy" "ebs_csi_policy" {
+  arn = "arn:aws:iam::aws:policy/service-role/AmazonEBSCSIDriverPolicy"
+}
+
+module "irsa-ebs-csi" {
+  source  = "terraform-aws-modules/iam/aws//modules/iam-assumable-role-with-oidc"
+  version = "5.39.0"
+
+  create_role                   = true
+  role_name                     = "AmazonEKSTFEBSCSIRole-${module.eks.cluster_name}"
+  provider_url                  = module.eks.oidc_provider
+  role_policy_arns              = [data.aws_iam_policy.ebs_csi_policy.arn]
+  oidc_fully_qualified_subjects = ["system:serviceaccount:kube-system:ebs-csi-controller-sa"]
+}

spartan/terraform/eks-cluster/outputs.tf

@@ -0,0 +1,19 @@
+output "cluster_endpoint" {
+  description = "Endpoint for EKS control plane"
+  value       = module.eks.cluster_endpoint
+}
+
+output "cluster_security_group_id" {
+  description = "Security group ids attached to the cluster control plane"
+  value       = module.eks.cluster_security_group_id
+}
+
+output "region" {
+  description = "AWS region"
+  value       = var.region
+}
+
+output "cluster_name" {
+  description = "Kubernetes Cluster Name"
+  value       = module.eks.cluster_name
+}

spartan/terraform/eks-cluster/variables.tf

@@ -0,0 +1,10 @@
+variable "region" {
+  description = "AWS region"
+  type    = string
+  default = "us-east-1"
+}
+
+variable "cluster_name" {
+  type    = string
+  default = "spartan"
+}