terraform-aws-eks/examples/launch_templates_with_managed_node_groups/main.tf

provider "aws" {
  region = local.region
}

locals {
  name            = "lt_with_mng-${random_string.suffix.result}"
  cluster_version = "1.20"
  region          = "eu-west-1"
}

################################################################################
# EKS Module
################################################################################

module "eks" {
  source = "../.."

  cluster_name    = local.name
  cluster_version = local.cluster_version

  vpc_id  = module.vpc.vpc_id
  subnets = module.vpc.private_subnets

  cluster_endpoint_private_access = true
  cluster_endpoint_public_access  = true

  node_groups = {
    # use arleady defined launch template
    example1 = {
      name_prefix      = "example1"
      desired_capacity = 1
      max_capacity     = 15
      min_capacity     = 1

      launch_template_id      = aws_launch_template.default.id
      launch_template_version = aws_launch_template.default.default_version

      instance_types = ["t3.small"]

      additional_tags = {
        ExtraTag = "example1"
      }
    }
    # create launch template
    example2 = {
      create_launch_template = true
      desired_capacity       = 1
      max_capacity           = 10
      min_capacity           = 1

      disk_size       = 50
      disk_type       = "gp3"
      disk_throughput = 150
      disk_iops       = 3000

      instance_types = ["t3.large"]
      capacity_type  = "SPOT"

      bootstrap_env = {
        CONTAINER_RUNTIME = "containerd"
        USE_MAX_PODS      = false
      }
      kubelet_extra_args = "--max-pods=110"
      k8s_labels = {
        GithubRepo = "terraform-aws-eks"
        GithubOrg  = "terraform-aws-modules"
      }
      additional_tags = {
        ExtraTag = "example2"
      }
      taints = [
        {
          key    = "dedicated"
          value  = "gpuGroup"
          effect = "NO_SCHEDULE"
        }
      ]
      update_config = {
        max_unavailable_percentage = 50 # or set `max_unavailable`
      }
    }
  }

  tags = {
    Example    = local.name
    GithubRepo = "terraform-aws-eks"
    GithubOrg  = "terraform-aws-modules"
  }
}

################################################################################
# Kubernetes provider configuration
################################################################################

data "aws_eks_cluster" "cluster" {
  name = module.eks.cluster_id
}

data "aws_eks_cluster_auth" "cluster" {
  name = module.eks.cluster_id
}

provider "kubernetes" {
  host                   = data.aws_eks_cluster.cluster.endpoint
  cluster_ca_certificate = base64decode(data.aws_eks_cluster.cluster.certificate_authority[0].data)
  token                  = data.aws_eks_cluster_auth.cluster.token
}

################################################################################
# Supporting Resources
################################################################################

data "aws_availability_zones" "available" {
}

resource "random_string" "suffix" {
  length  = 8
  special = false
}

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "~> 3.0"

  name                 = local.name
  cidr                 = "10.0.0.0/16"
  azs                  = data.aws_availability_zones.available.names
  private_subnets      = ["10.0.1.0/24", "10.0.2.0/24", "10.0.3.0/24"]
  public_subnets       = ["10.0.4.0/24", "10.0.5.0/24", "10.0.6.0/24"]
  enable_nat_gateway   = true
  single_nat_gateway   = true
  enable_dns_hostnames = true

  public_subnet_tags = {
    "kubernetes.io/cluster/${local.name}" = "shared"
    "kubernetes.io/role/elb"              = "1"
  }

  private_subnet_tags = {
    "kubernetes.io/cluster/${local.name}" = "shared"
    "kubernetes.io/role/internal-elb"     = "1"
  }

  tags = {
    Example    = local.name
    GithubRepo = "terraform-aws-eks"
    GithubOrg  = "terraform-aws-modules"
  }
}