terraform-aws-eks-cluster

Terraform module to provision an EKS cluster on AWS.

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Introduction

The module provisions the following resources:

EKS cluster of master nodes that can be used together with the terraform-aws-eks-workers module to create a full-blown cluster
IAM Role to allow the cluster to access other AWS services
Security Group which is used by EKS workers to connect to the cluster and kubelets and pods to receive communication from the cluster control plane (see terraform-aws-eks-workers)
The module generates kubeconfig configuration to connect to the cluster using kubectl

Usage

IMPORTANT: The master branch is used in source just as an example. In your code, do not pin to master because there may be breaking changes between releases. Instead pin to the release tag (e.g. ?ref=tags/x.y.z) of one of our latest releases.

Module usage examples:

examples/complete - complete example
terraform-root-modules/eks - Cloud Posse's service catalog of "root module" invocations for provisioning reference architectures
terraform-root-modules/eks-backing-services-peering - example of VPC peering between the EKS VPC and backing services VPC

  provider "aws" {
    region = var.region
  }

  module "label" {
    source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
    namespace  = var.namespace
    name       = var.name
    stage      = var.stage
    delimiter  = var.delimiter
    attributes = compact(concat(var.attributes, list("cluster")))
    tags       = var.tags
  }

  locals {
    # The usage of the specific kubernetes.io/cluster/* resource tags below are required
    # for EKS and Kubernetes to discover and manage networking resources
    # https://www.terraform.io/docs/providers/aws/guides/eks-getting-started.html#base-vpc-networking
    tags = merge(var.tags, map("kubernetes.io/cluster/${module.label.id}", "shared"))
  }

  module "vpc" {
    source     = "git::https://github.com/cloudposse/terraform-aws-vpc.git?ref=master"
    namespace  = var.namespace
    stage      = var.stage
    name       = var.name
    attributes = var.attributes
    cidr_block = "172.16.0.0/16"
    tags       = local.tags
  }

  module "subnets" {
    source               = "git::https://github.com/cloudposse/terraform-aws-dynamic-subnets.git?ref=master"
    availability_zones   = var.availability_zones
    namespace            = var.namespace
    stage                = var.stage
    name                 = var.name
    attributes           = var.attributes
    vpc_id               = module.vpc.vpc_id
    igw_id               = module.vpc.igw_id
    cidr_block           = module.vpc.vpc_cidr_block
    nat_gateway_enabled  = false
    nat_instance_enabled = false
    tags                 = local.tags
  }

  module "eks_workers" {
    source                             = "git::https://github.com/cloudposse/terraform-aws-eks-workers.git?ref=master"
    namespace                          = var.namespace
    stage                              = var.stage
    name                               = var.name
    attributes                         = var.attributes
    tags                               = var.tags
    instance_type                      = var.instance_type
    vpc_id                             = module.vpc.vpc_id
    subnet_ids                         = module.subnets.public_subnet_ids
    health_check_type                  = var.health_check_type
    min_size                           = var.min_size
    max_size                           = var.max_size
    wait_for_capacity_timeout          = var.wait_for_capacity_timeout
    cluster_name                       = module.label.id
    cluster_endpoint                   = module.eks_cluster.eks_cluster_endpoint
    cluster_certificate_authority_data = module.eks_cluster.eks_cluster_certificate_authority_data
    cluster_security_group_id          = module.eks_cluster.security_group_id

    # Auto-scaling policies and CloudWatch metric alarms
    autoscaling_policies_enabled           = var.autoscaling_policies_enabled
    cpu_utilization_high_threshold_percent = var.cpu_utilization_high_threshold_percent
    cpu_utilization_low_threshold_percent  = var.cpu_utilization_low_threshold_percent
  }

  module "eks_cluster" {
    source     = "git::https://github.com/cloudposse/terraform-aws-eks-cluster.git?ref=master"
    namespace  = var.namespace
    stage      = var.stage
    name       = var.name
    attributes = var.attributes
    tags       = var.tags
    vpc_id     = module.vpc.vpc_id
    subnet_ids = module.subnets.public_subnet_ids

    kubernetes_version = var.kubernetes_version
    kubeconfig_path    = var.kubeconfig_path

    workers_security_group_ids   = [module.eks_workers.security_group_id]
    workers_role_arns            = [module.eks_workers.workers_role_arn]
  }

Module usage with two worker groups:

  {
  ...

  module "eks_workers" {
    source                             = "git::https://github.com/cloudposse/terraform-aws-eks-workers.git?ref=master"
    namespace                          = var.namespace
    stage                              = var.stage
    name                               = "small"
    attributes                         = var.attributes
    tags                               = var.tags
    instance_type                      = "t3.small"
    vpc_id                             = module.vpc.vpc_id
    subnet_ids                         = module.subnets.public_subnet_ids
    health_check_type                  = var.health_check_type
    min_size                           = var.min_size
    max_size                           = var.max_size
    wait_for_capacity_timeout          = var.wait_for_capacity_timeout
    cluster_name                       = module.label.id
    cluster_endpoint                   = module.eks_cluster.eks_cluster_endpoint
    cluster_certificate_authority_data = module.eks_cluster.eks_cluster_certificate_authority_data
    cluster_security_group_id          = module.eks_cluster.security_group_id

    # Auto-scaling policies and CloudWatch metric alarms
    autoscaling_policies_enabled           = var.autoscaling_policies_enabled
    cpu_utilization_high_threshold_percent = var.cpu_utilization_high_threshold_percent
    cpu_utilization_low_threshold_percent  = var.cpu_utilization_low_threshold_percent
  }

  module "eks_workers_2" {
    source                             = "git::https://github.com/cloudposse/terraform-aws-eks-workers.git?ref=master"
    namespace                          = var.namespace
    stage                              = var.stage
    name                               = "medium"
    attributes                         = var.attributes
    tags                               = var.tags
    instance_type                      = "t3.medium"
    vpc_id                             = module.vpc.vpc_id
    subnet_ids                         = module.subnets.public_subnet_ids
    health_check_type                  = var.health_check_type
    min_size                           = var.min_size
    max_size                           = var.max_size
    wait_for_capacity_timeout          = var.wait_for_capacity_timeout
    cluster_name                       = module.label.id
    cluster_endpoint                   = module.eks_cluster.eks_cluster_endpoint
    cluster_certificate_authority_data = module.eks_cluster.eks_cluster_certificate_authority_data
    cluster_security_group_id          = module.eks_cluster.security_group_id

    # Auto-scaling policies and CloudWatch metric alarms
    autoscaling_policies_enabled           = var.autoscaling_policies_enabled
    cpu_utilization_high_threshold_percent = var.cpu_utilization_high_threshold_percent
    cpu_utilization_low_threshold_percent  = var.cpu_utilization_low_threshold_percent
  }

  module "eks_cluster" {
    source     = "git::https://github.com/cloudposse/terraform-aws-eks-cluster.git?ref=master"
    namespace  = var.namespace
    stage      = var.stage
    name       = var.name
    attributes = var.attributes
    tags       = var.tags
    vpc_id     = module.vpc.vpc_id
    subnet_ids = module.subnets.public_subnet_ids

    kubernetes_version = var.kubernetes_version
    kubeconfig_path    = var.kubeconfig_path

    workers_role_arns          = [module.eks_workers.workers_role_arn, module.eks_workers_2.workers_role_arn]
    workers_security_group_ids = [module.eks_workers.security_group_id, module.eks_workers_2.security_group_id]
    
  }

Makefile Targets

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen
  lint                                Lint terraform code

Inputs

Name	Description	Type	Default	Required
allowed_cidr_blocks	List of CIDR blocks to be allowed to connect to the EKS cluster	list(string)	`<list>`	no
allowed_security_groups	List of Security Group IDs to be allowed to connect to the EKS cluster	list(string)	`<list>`	no
apply_config_map_aws_auth	Whether to generate local files from `kubeconfig` and `config-map-aws-auth` templates and perform `kubectl apply` to apply the ConfigMap to allow worker nodes to join the EKS cluster	bool	`true`	no
associate_public_ip_address	Associate a public IP address with an instance in a VPC	bool	`true`	no
attributes	Additional attributes (e.g. `1`)	list(string)	`<list>`	no
configmap_auth_file	Path to `configmap_auth_file`	string	``	no
configmap_auth_template_file	Path to `config_auth_template_file`	string	``	no
delimiter	Delimiter to be used between `name`, `namespace`, `stage`, etc.	string	`-`	no
enabled	Whether to create the resources. Set to `false` to prevent the module from creating any resources	bool	`true`	no
enabled_cluster_log_types	A list of the desired control plane logging to enable. For more information, see https://docs.aws.amazon.com/en_us/eks/latest/userguide/control-plane-logs.html. Possible values [`api`, `audit`, `authenticator`, `controllerManager`, `scheduler`]	list(string)	`<list>`	no
endpoint_private_access	Indicates whether or not the Amazon EKS private API server endpoint is enabled. Default to AWS EKS resource and it is false	bool	`false`	no
endpoint_public_access	Indicates whether or not the Amazon EKS public API server endpoint is enabled. Default to AWS EKS resource and it is true	bool	`true`	no
kubeconfig_path	The path to `kubeconfig` file	string	`~/.kube/config`	no
kubernetes_version	Desired Kubernetes master version. If you do not specify a value, the latest available version is used	string	`1.14`	no
local_exec_interpreter	shell to use for local exec	string	`/bin/sh`	no
map_additional_aws_accounts	Additional AWS account numbers to add to `config-map-aws-auth` ConfigMap	list(string)	`<list>`	no
map_additional_iam_roles	Additional IAM roles to add to `config-map-aws-auth` ConfigMap	object	`<list>`	no
map_additional_iam_users	Additional IAM users to add to `config-map-aws-auth` ConfigMap	object	`<list>`	no
name	Solution name, e.g. 'app' or 'cluster'	string	-	yes
namespace	Namespace, which could be your organization name, e.g. 'eg' or 'cp'	string	``	no
region	AWS Region	string	-	yes
stage	Stage, e.g. 'prod', 'staging', 'dev', or 'test'	string	``	no
subnet_ids	A list of subnet IDs to launch the cluster in	list(string)	-	yes
tags	Additional tags (e.g. `map('BusinessUnit`,`XYZ`)	map(string)	`<map>`	no
vpc_id	VPC ID for the EKS cluster	string	-	yes
workers_role_arns	List of Role ARNs of the worker nodes	list(string)	-	yes
workers_security_group_ids	Security Group IDs of the worker nodes	list(string)	-	yes

Outputs

Name	Description
eks_cluster_arn	The Amazon Resource Name (ARN) of the cluster
eks_cluster_certificate_authority_data	The Kubernetes cluster certificate authority data
eks_cluster_endpoint	The endpoint for the Kubernetes API server
eks_cluster_id	The name of the cluster
eks_cluster_version	The Kubernetes server version of the cluster
security_group_arn	ARN of the EKS cluster Security Group
security_group_id	ID of the EKS cluster Security Group
security_group_name	Name of the EKS cluster Security Group

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Related Projects

Check out these related projects.

terraform-aws-eks-workers - Terraform module to provision an AWS AutoScaling Group, IAM Role, and Security Group for EKS Workers
terraform-aws-ec2-autoscale-group - Terraform module to provision Auto Scaling Group and Launch Template on AWS
terraform-aws-ecs-container-definition - Terraform module to generate well-formed JSON documents (container definitions) that are passed to the aws_ecs_task_definition Terraform resource
terraform-aws-ecs-alb-service-task - Terraform module which implements an ECS service which exposes a web service via ALB
terraform-aws-ecs-web-app - Terraform module that implements a web app on ECS and supports autoscaling, CI/CD, monitoring, ALB integration, and much more
terraform-aws-ecs-codepipeline - Terraform module for CI/CD with AWS Code Pipeline and Code Build for ECS
terraform-aws-ecs-cloudwatch-autoscaling - Terraform module to autoscale ECS Service based on CloudWatch metrics
terraform-aws-ecs-cloudwatch-sns-alarms - Terraform module to create CloudWatch Alarms on ECS Service level metrics
terraform-aws-ec2-instance - Terraform module for providing a general purpose EC2 instance
terraform-aws-ec2-instance-group - Terraform module for provisioning multiple general purpose EC2 hosts for stateful applications

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Copyright

License

See LICENSE for full details.

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
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Contributors

Erik Osterman	Andriy Knysh	Igor Rodionov	Oscar

betonesbr/terraform-aws-eks-cluster