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ebs optimization of instances now possible
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‎CHANGELOG.md

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@@ -13,6 +13,7 @@ project adheres to [Semantic Versioning](http://semver.org/).
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- `workers_ami_id` is now made optional. If not specified, the module will source the latest AWS supported EKS AMI instead.
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- added ability to specify extra userdata code to execute after the second to configure and start kube services.
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- When `configure_kubectl_session` is set to true the current shell will be configured to talk to the kubernetes cluster using config files output from the module.
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- EBS optimization used whenever possible for the given instance type.
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## [[v0.1.1](https://github.com/terraform-aws-modules/terraform-aws-eks/compare/v0.1.0...v0.1.1)] - 2018-06-07]
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‎data.tf

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@@ -71,3 +71,8 @@ data template_file config_map_aws_auth {
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role_arn = "${aws_iam_role.workers.arn}"
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}
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}
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module "ebs_optimized" {
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source = "modules/util/ebs_optimized/"
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instance_type = "${var.workers_instance_type}"
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}

‎examples/eks_test_fixture/README.md

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@@ -6,19 +6,6 @@ This set of templates serves a few purposes. It:
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2. serves as the test infrastructure for CI on the project.
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3. provides a simple way to play with the Kubernetes cluster you create.
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## testing with kubectl
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Once converged, `kubeconfig` and `config-map-aws-auth.yml` should be in this directory.
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Ensure you have a recent version of `kubectl` on your PATH ([instructions here](https://kubernetes.io/docs/tasks/tools/install-kubectl/#install-kubectl))
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```bash
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curl -o heptio-authenticator-aws https://amazon-eks.s3-us-west-2.amazonaws.com/1.10.3/2018-06-05/bin/darwin/amd64/heptio-authenticator-aws
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mv heptio-authenticator-aws ~/go/bin/
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kubectl apply -f examples/eks_test_fixture/config-map-aws-auth.yaml --kubeconfig examples/eks_test_fixture/kubeconfig
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# configmap "aws-auth" created
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kubectl get nodes --watch --kubeconfig examples/eks_test_fixture/kubeconfig
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```
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## IAM Permissions
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The following IAM policy is the minimum needed to execute the module from the test suite.

‎modules/util/ebs_optimized/main.tf

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/**
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# terraform_util_ebs_optimized
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A terraform module to return true or false based on if an instance type supports the EBS optmized flag.
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*/
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locals {
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ebs_optimized_types = {
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"c4.large" = true
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"c4.xlarge" = true
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"c4.2xlarge" = true
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"c4.4xlarge" = true
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"c4.8xlarge" = true
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"c5.large" = true
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"c5.xlarge" = true
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"c5.2xlarge" = true
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"c5.4xlarge" = true
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"c5.9xlarge" = true
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"c5.18xlarge" = true
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"c5d.large" = true
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"c5d.xlarge" = true
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"c5d.2xlarge" = true
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"c5d.4xlarge" = true
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"c5d.9xlarge" = true
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"c5d.18xlarge" = true
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"d2.xlarge" = true
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"d2.2xlarge" = true
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"d2.4xlarge" = true
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"d2.8xlarge" = true
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"f1.2xlarge" = true
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"f1.16xlarge" = true
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"g3.4xlarge" = true
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"g3.8xlarge" = true
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"g3.16xlarge" = true
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"h1.2xlarge" = true
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"h1.4xlarge" = true
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"h1.8xlarge" = true
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"h1.16xlarge" = true
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"i3.large" = true
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"i3.xlarge" = true
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"i3.2xlarge" = true
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"i3.4xlarge" = true
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"i3.8xlarge" = true
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"i3.16xlarge" = true
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"i3.metal" = true
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"m4.large" = true
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"m4.xlarge" = true
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"m4.2xlarge" = true
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"m4.4xlarge" = true
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"m4.10xlarge" = true
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"m4.16xlarge" = true
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"m5.large" = true
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"m5.xlarge" = true
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"m5.2xlarge" = true
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"m5.4xlarge" = true
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"m5.12xlarge" = true
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"m5.24xlarge" = true
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"m5d.large" = true
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"m5d.xlarge" = true
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"m5d.2xlarge" = true
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"m5d.4xlarge" = true
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"m5d.12xlarge" = true
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"m5d.24xlarge" = true
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"p2.xlarge" = true
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"p2.8xlarge" = true
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"p2.16xlarge" = true
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"p3.2xlarge" = true
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"p3.8xlarge" = true
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"p3.16xlarge" = true
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"r4.large" = true
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"r4.xlarge" = true
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"r4.2xlarge" = true
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"r4.4xlarge" = true
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"r4.8xlarge" = true
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"r4.16xlarge" = true
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"x1.16xlarge" = true
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"x1.32xlarge" = true
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"x1e.xlarge" = true
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"x1e.2xlarge" = true
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"x1e.4xlarge" = true
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"x1e.8xlarge" = true
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"x1e.16xlarge" = true
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"x1e.32xlarge" = true
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"c5.large" = true
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"c5.xlarge" = true
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"c5.2xlarge" = true
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"c5d.large" = true
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"c5d.xlarge" = true
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"c5d.2xlarge" = true
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"m5.large" = true
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"m5.xlarge" = true
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"m5.2xlarge" = true
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"m5d.large" = true
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"m5d.xlarge" = true
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"m5d.2xlarge" = true
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"c1.xlarge" = true
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"c3.xlarge" = true
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"c3.2xlarge" = true
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"c3.4xlarge" = true
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"g2.2xlarge" = true
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"i2.xlarge" = true
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"i2.2xlarge" = true
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"i2.4xlarge" = true
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"m1.large" = true
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"m1.xlarge" = true
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"m2.2xlarge" = true
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"m2.4xlarge" = true
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"m3.xlarge" = true
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"m3.2xlarge" = true
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"r3.xlarge" = true
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"r3.2xlarge" = true
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"r3.4xlarge" = true
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}
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}

‎modules/util/ebs_optimized/outputs.tf

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output "answer" {
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description = "Returns true or false depending on if the instance type is able to be EBS optimized."
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value = "${lookup(local.ebs_optimized_types, var.instance_type, false)}"
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}

‎modules/util/ebs_optimized/variables.tf

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variable "instance_type" {
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description = "Instance type to evaluate if EBS optimized is an option."
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}

‎variables.tf

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default = false
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}
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variable "ebs_optimized_workers" {
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description = "If left at default of true, will use ebs optimization if available on the given instance type."
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default = true
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}
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variable "subnets" {
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description = "A list of subnets to associate with the cluster's underlying instances."
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type = "list"

‎workers.tf

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instance_type = "${var.workers_instance_type}"
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security_groups = ["${aws_security_group.workers.id}"]
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user_data_base64 = "${base64encode(data.template_file.userdata.rendered)}"
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ebs_optimized = false
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ebs_optimized = "${var.ebs_optimized_workers ? module.ebs_optimized.answer : false}"
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lifecycle {
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create_before_destroy = true

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