docs: Move examples that are more like test cases to the new tests/ directory; add better example configurations (#3069)

* chore: Move examples that are more like test cases to the new `tests/` directory

* chore: Stash

* feat: Add better examples for EKS managed node groups

* chore: Add better examples for self-managed node groups

* chore: Update docs and correct `nodegroup` to `node group`
This commit is contained in:
Bryant Biggs
2024-06-13 10:51:40 -04:00
committed by GitHub
parent 73b752a1e3
commit 323fb759d7
85 changed files with 509 additions and 109 deletions

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# Self-managed Node Group
## Usage
To provision the provided configurations you need to execute:
```bash
$ terraform init
$ terraform plan
$ terraform apply --auto-approve
```
Note that this example may create resources which cost money. Run `terraform destroy` when you don't need these resources.
<!-- BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
## Requirements
| Name | Version |
|------|---------|
| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.3.2 |
| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 5.40 |
## Providers
| Name | Version |
|------|---------|
| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 5.40 |
## Modules
| Name | Source | Version |
|------|--------|---------|
| <a name="module_disabled_self_managed_node_group"></a> [disabled\_self\_managed\_node\_group](#module\_disabled\_self\_managed\_node\_group) | ../../modules/self-managed-node-group | n/a |
| <a name="module_ebs_kms_key"></a> [ebs\_kms\_key](#module\_ebs\_kms\_key) | terraform-aws-modules/kms/aws | ~> 2.0 |
| <a name="module_eks"></a> [eks](#module\_eks) | ../.. | n/a |
| <a name="module_key_pair"></a> [key\_pair](#module\_key\_pair) | terraform-aws-modules/key-pair/aws | ~> 2.0 |
| <a name="module_kms"></a> [kms](#module\_kms) | terraform-aws-modules/kms/aws | ~> 2.1 |
| <a name="module_vpc"></a> [vpc](#module\_vpc) | terraform-aws-modules/vpc/aws | ~> 5.0 |
## Resources
| Name | Type |
|------|------|
| [aws_iam_policy.additional](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
| [aws_ami.eks_default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ami) | data source |
| [aws_ami.eks_default_bottlerocket](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ami) | data source |
| [aws_availability_zones.available](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/availability_zones) | data source |
| [aws_caller_identity.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/caller_identity) | data source |
## Inputs
No inputs.
## Outputs
| Name | Description |
|------|-------------|
| <a name="output_access_entries"></a> [access\_entries](#output\_access\_entries) | Map of access entries created and their attributes |
| <a name="output_cloudwatch_log_group_arn"></a> [cloudwatch\_log\_group\_arn](#output\_cloudwatch\_log\_group\_arn) | Arn of cloudwatch log group created |
| <a name="output_cloudwatch_log_group_name"></a> [cloudwatch\_log\_group\_name](#output\_cloudwatch\_log\_group\_name) | Name of cloudwatch log group created |
| <a name="output_cluster_addons"></a> [cluster\_addons](#output\_cluster\_addons) | Map of attribute maps for all EKS cluster addons enabled |
| <a name="output_cluster_arn"></a> [cluster\_arn](#output\_cluster\_arn) | The Amazon Resource Name (ARN) of the cluster |
| <a name="output_cluster_certificate_authority_data"></a> [cluster\_certificate\_authority\_data](#output\_cluster\_certificate\_authority\_data) | Base64 encoded certificate data required to communicate with the cluster |
| <a name="output_cluster_endpoint"></a> [cluster\_endpoint](#output\_cluster\_endpoint) | Endpoint for your Kubernetes API server |
| <a name="output_cluster_iam_role_arn"></a> [cluster\_iam\_role\_arn](#output\_cluster\_iam\_role\_arn) | IAM role ARN of the EKS cluster |
| <a name="output_cluster_iam_role_name"></a> [cluster\_iam\_role\_name](#output\_cluster\_iam\_role\_name) | IAM role name of the EKS cluster |
| <a name="output_cluster_iam_role_unique_id"></a> [cluster\_iam\_role\_unique\_id](#output\_cluster\_iam\_role\_unique\_id) | Stable and unique string identifying the IAM role |
| <a name="output_cluster_id"></a> [cluster\_id](#output\_cluster\_id) | The ID of the EKS cluster. Note: currently a value is returned only for local EKS clusters created on Outposts |
| <a name="output_cluster_identity_providers"></a> [cluster\_identity\_providers](#output\_cluster\_identity\_providers) | Map of attribute maps for all EKS identity providers enabled |
| <a name="output_cluster_ip_family"></a> [cluster\_ip\_family](#output\_cluster\_ip\_family) | The IP family used by the cluster (e.g. `ipv4` or `ipv6`) |
| <a name="output_cluster_name"></a> [cluster\_name](#output\_cluster\_name) | The name of the EKS cluster |
| <a name="output_cluster_oidc_issuer_url"></a> [cluster\_oidc\_issuer\_url](#output\_cluster\_oidc\_issuer\_url) | The URL on the EKS cluster for the OpenID Connect identity provider |
| <a name="output_cluster_platform_version"></a> [cluster\_platform\_version](#output\_cluster\_platform\_version) | Platform version for the cluster |
| <a name="output_cluster_primary_security_group_id"></a> [cluster\_primary\_security\_group\_id](#output\_cluster\_primary\_security\_group\_id) | Cluster security group that was created by Amazon EKS for the cluster. Managed node groups use this security group for control-plane-to-data-plane communication. Referred to as 'Cluster security group' in the EKS console |
| <a name="output_cluster_security_group_arn"></a> [cluster\_security\_group\_arn](#output\_cluster\_security\_group\_arn) | Amazon Resource Name (ARN) of the cluster security group |
| <a name="output_cluster_security_group_id"></a> [cluster\_security\_group\_id](#output\_cluster\_security\_group\_id) | ID of the cluster security group |
| <a name="output_cluster_service_cidr"></a> [cluster\_service\_cidr](#output\_cluster\_service\_cidr) | The CIDR block where Kubernetes pod and service IP addresses are assigned from |
| <a name="output_cluster_status"></a> [cluster\_status](#output\_cluster\_status) | Status of the EKS cluster. One of `CREATING`, `ACTIVE`, `DELETING`, `FAILED` |
| <a name="output_cluster_tls_certificate_sha1_fingerprint"></a> [cluster\_tls\_certificate\_sha1\_fingerprint](#output\_cluster\_tls\_certificate\_sha1\_fingerprint) | The SHA1 fingerprint of the public key of the cluster's certificate |
| <a name="output_eks_managed_node_groups"></a> [eks\_managed\_node\_groups](#output\_eks\_managed\_node\_groups) | Map of attribute maps for all EKS managed node groups created |
| <a name="output_eks_managed_node_groups_autoscaling_group_names"></a> [eks\_managed\_node\_groups\_autoscaling\_group\_names](#output\_eks\_managed\_node\_groups\_autoscaling\_group\_names) | List of the autoscaling group names created by EKS managed node groups |
| <a name="output_fargate_profiles"></a> [fargate\_profiles](#output\_fargate\_profiles) | Map of attribute maps for all EKS Fargate Profiles created |
| <a name="output_kms_key_arn"></a> [kms\_key\_arn](#output\_kms\_key\_arn) | The Amazon Resource Name (ARN) of the key |
| <a name="output_kms_key_id"></a> [kms\_key\_id](#output\_kms\_key\_id) | The globally unique identifier for the key |
| <a name="output_kms_key_policy"></a> [kms\_key\_policy](#output\_kms\_key\_policy) | The IAM resource policy set on the key |
| <a name="output_node_security_group_arn"></a> [node\_security\_group\_arn](#output\_node\_security\_group\_arn) | Amazon Resource Name (ARN) of the node shared security group |
| <a name="output_node_security_group_id"></a> [node\_security\_group\_id](#output\_node\_security\_group\_id) | ID of the node shared security group |
| <a name="output_oidc_provider"></a> [oidc\_provider](#output\_oidc\_provider) | The OpenID Connect identity provider (issuer URL without leading `https://`) |
| <a name="output_oidc_provider_arn"></a> [oidc\_provider\_arn](#output\_oidc\_provider\_arn) | The ARN of the OIDC Provider if `enable_irsa = true` |
| <a name="output_self_managed_node_groups"></a> [self\_managed\_node\_groups](#output\_self\_managed\_node\_groups) | Map of attribute maps for all self managed node groups created |
| <a name="output_self_managed_node_groups_autoscaling_group_names"></a> [self\_managed\_node\_groups\_autoscaling\_group\_names](#output\_self\_managed\_node\_groups\_autoscaling\_group\_names) | List of the autoscaling group names created by self-managed node groups |
<!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->

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provider "aws" {
region = local.region
}
data "aws_caller_identity" "current" {}
data "aws_availability_zones" "available" {}
locals {
name = "ex-${replace(basename(path.cwd), "_", "-")}"
cluster_version = "1.29"
region = "eu-west-1"
vpc_cidr = "10.0.0.0/16"
azs = slice(data.aws_availability_zones.available.names, 0, 3)
tags = {
Test = local.name
GithubRepo = "terraform-aws-eks"
GithubOrg = "terraform-aws-modules"
}
}
################################################################################
# EKS Module
################################################################################
module "eks" {
source = "../.."
cluster_name = local.name
cluster_version = local.cluster_version
cluster_endpoint_public_access = true
enable_cluster_creator_admin_permissions = true
# Enable EFA support by adding necessary security group rules
# to the shared node security group
enable_efa_support = true
cluster_addons = {
coredns = {
most_recent = true
}
kube-proxy = {
most_recent = true
}
vpc-cni = {
most_recent = true
}
}
vpc_id = module.vpc.vpc_id
subnet_ids = module.vpc.private_subnets
control_plane_subnet_ids = module.vpc.intra_subnets
# External encryption key
create_kms_key = false
cluster_encryption_config = {
resources = ["secrets"]
provider_key_arn = module.kms.key_arn
}
self_managed_node_group_defaults = {
# enable discovery of autoscaling groups by cluster-autoscaler
autoscaling_group_tags = {
"k8s.io/cluster-autoscaler/enabled" : true,
"k8s.io/cluster-autoscaler/${local.name}" : "owned",
}
}
self_managed_node_groups = {
# Default node group - as provisioned by the module defaults
default_node_group = {}
# AL2023 node group utilizing new user data format which utilizes nodeadm
# to join nodes to the cluster (instead of /etc/eks/bootstrap.sh)
al2023_nodeadm = {
ami_type = "AL2023_x86_64_STANDARD"
cloudinit_pre_nodeadm = [
{
content_type = "application/node.eks.aws"
content = <<-EOT
---
apiVersion: node.eks.aws/v1alpha1
kind: NodeConfig
spec:
kubelet:
config:
shutdownGracePeriod: 30s
featureGates:
DisableKubeletCloudCredentialProviders: true
EOT
}
]
}
# Bottlerocket node group
bottlerocket = {
name = "bottlerocket-self-mng"
ami_type = "BOTTLEROCKET_x86_64"
ami_id = data.aws_ami.eks_default_bottlerocket.id
instance_type = "m5.large"
desired_size = 2
key_name = module.key_pair.key_pair_name
bootstrap_extra_args = <<-EOT
# The admin host container provides SSH access and runs with "superpowers".
# It is disabled by default, but can be disabled explicitly.
[settings.host-containers.admin]
enabled = false
# The control host container provides out-of-band access via SSM.
# It is enabled by default, and can be disabled if you do not expect to use SSM.
# This could leave you with no way to access the API and change settings on an existing node!
[settings.host-containers.control]
enabled = true
# extra args added
[settings.kernel]
lockdown = "integrity"
[settings.kubernetes.node-labels]
label1 = "foo"
label2 = "bar"
[settings.kubernetes.node-taints]
dedicated = "experimental:PreferNoSchedule"
special = "true:NoSchedule"
EOT
}
mixed = {
name = "mixed"
min_size = 1
max_size = 5
desired_size = 2
bootstrap_extra_args = "--kubelet-extra-args '--node-labels=node.kubernetes.io/lifecycle=spot'"
use_mixed_instances_policy = true
mixed_instances_policy = {
instances_distribution = {
on_demand_base_capacity = 0
on_demand_percentage_above_base_capacity = 20
spot_allocation_strategy = "capacity-optimized"
}
override = [
{
instance_type = "m5.large"
weighted_capacity = "1"
},
{
instance_type = "m6i.large"
weighted_capacity = "2"
},
]
}
}
# Complete
complete = {
name = "complete-self-mng"
use_name_prefix = false
subnet_ids = module.vpc.public_subnets
min_size = 1
max_size = 7
desired_size = 1
ami_id = data.aws_ami.eks_default.id
pre_bootstrap_user_data = <<-EOT
export FOO=bar
EOT
post_bootstrap_user_data = <<-EOT
echo "you are free little kubelet!"
EOT
instance_type = "m6i.large"
launch_template_name = "self-managed-ex"
launch_template_use_name_prefix = true
launch_template_description = "Self managed node group example launch template"
ebs_optimized = true
enable_monitoring = true
block_device_mappings = {
xvda = {
device_name = "/dev/xvda"
ebs = {
volume_size = 75
volume_type = "gp3"
iops = 3000
throughput = 150
encrypted = true
kms_key_id = module.ebs_kms_key.key_arn
delete_on_termination = true
}
}
}
instance_attributes = {
name = "instance-attributes"
min_size = 1
max_size = 2
desired_size = 1
bootstrap_extra_args = "--kubelet-extra-args '--node-labels=node.kubernetes.io/lifecycle=spot'"
instance_type = null
# launch template configuration
instance_requirements = {
cpu_manufacturers = ["intel"]
instance_generations = ["current", "previous"]
spot_max_price_percentage_over_lowest_price = 100
vcpu_count = {
min = 1
}
allowed_instance_types = ["t*", "m*"]
}
use_mixed_instances_policy = true
mixed_instances_policy = {
instances_distribution = {
on_demand_base_capacity = 0
on_demand_percentage_above_base_capacity = 0
on_demand_allocation_strategy = "lowest-price"
spot_allocation_strategy = "price-capacity-optimized"
}
# ASG configuration
override = [
{
instance_requirements = {
cpu_manufacturers = ["intel"]
instance_generations = ["current", "previous"]
spot_max_price_percentage_over_lowest_price = 100
vcpu_count = {
min = 1
}
allowed_instance_types = ["t*", "m*"]
}
}
]
}
}
metadata_options = {
http_endpoint = "enabled"
http_tokens = "required"
http_put_response_hop_limit = 2
instance_metadata_tags = "disabled"
}
create_iam_role = true
iam_role_name = "self-managed-node-group-complete-example"
iam_role_use_name_prefix = false
iam_role_description = "Self managed node group complete example role"
iam_role_tags = {
Purpose = "Protector of the kubelet"
}
iam_role_additional_policies = {
AmazonEC2ContainerRegistryReadOnly = "arn:aws:iam::aws:policy/AmazonEC2ContainerRegistryReadOnly"
additional = aws_iam_policy.additional.arn
}
tags = {
ExtraTag = "Self managed node group complete example"
}
}
efa = {
# Disabling automatic creation due to instance type/quota availability
# Can be enabled when appropriate for testing/validation
create = false
ami_type = "AL2_x86_64_GPU"
instance_type = "trn1n.32xlarge"
enable_efa_support = true
pre_bootstrap_user_data = <<-EOT
# Mount NVME instance store volumes since they are typically
# available on instances that support EFA
setup-local-disks raid0
EOT
min_size = 2
max_size = 2
desired_size = 2
}
}
tags = local.tags
}
module "disabled_self_managed_node_group" {
source = "../../modules/self-managed-node-group"
create = false
# Hard requirement
cluster_service_cidr = ""
}
################################################################################
# Supporting Resources
################################################################################
module "vpc" {
source = "terraform-aws-modules/vpc/aws"
version = "~> 5.0"
name = local.name
cidr = local.vpc_cidr
azs = local.azs
private_subnets = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 4, k)]
public_subnets = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 8, k + 48)]
intra_subnets = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 8, k + 52)]
enable_nat_gateway = true
single_nat_gateway = true
public_subnet_tags = {
"kubernetes.io/role/elb" = 1
}
private_subnet_tags = {
"kubernetes.io/role/internal-elb" = 1
}
tags = local.tags
}
data "aws_ami" "eks_default" {
most_recent = true
owners = ["amazon"]
filter {
name = "name"
values = ["amazon-eks-node-${local.cluster_version}-v*"]
}
}
data "aws_ami" "eks_default_bottlerocket" {
most_recent = true
owners = ["amazon"]
filter {
name = "name"
values = ["bottlerocket-aws-k8s-${local.cluster_version}-x86_64-*"]
}
}
module "key_pair" {
source = "terraform-aws-modules/key-pair/aws"
version = "~> 2.0"
key_name_prefix = local.name
create_private_key = true
tags = local.tags
}
module "ebs_kms_key" {
source = "terraform-aws-modules/kms/aws"
version = "~> 2.0"
description = "Customer managed key to encrypt EKS managed node group volumes"
# Policy
key_administrators = [
data.aws_caller_identity.current.arn
]
key_service_roles_for_autoscaling = [
# required for the ASG to manage encrypted volumes for nodes
"arn:aws:iam::${data.aws_caller_identity.current.account_id}:role/aws-service-role/autoscaling.amazonaws.com/AWSServiceRoleForAutoScaling",
# required for the cluster / persistentvolume-controller to create encrypted PVCs
module.eks.cluster_iam_role_arn,
]
# Aliases
aliases = ["eks/${local.name}/ebs"]
tags = local.tags
}
module "kms" {
source = "terraform-aws-modules/kms/aws"
version = "~> 2.1"
aliases = ["eks/${local.name}"]
description = "${local.name} cluster encryption key"
enable_default_policy = true
key_owners = [data.aws_caller_identity.current.arn]
tags = local.tags
}
resource "aws_iam_policy" "additional" {
name = "${local.name}-additional"
description = "Example usage of node additional policy"
policy = jsonencode({
Version = "2012-10-17"
Statement = [
{
Action = [
"ec2:Describe*",
]
Effect = "Allow"
Resource = "*"
},
]
})
tags = local.tags
}

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################################################################################
# Cluster
################################################################################
output "cluster_arn" {
description = "The Amazon Resource Name (ARN) of the cluster"
value = module.eks.cluster_arn
}
output "cluster_certificate_authority_data" {
description = "Base64 encoded certificate data required to communicate with the cluster"
value = module.eks.cluster_certificate_authority_data
}
output "cluster_endpoint" {
description = "Endpoint for your Kubernetes API server"
value = module.eks.cluster_endpoint
}
output "cluster_id" {
description = "The ID of the EKS cluster. Note: currently a value is returned only for local EKS clusters created on Outposts"
value = module.eks.cluster_id
}
output "cluster_name" {
description = "The name of the EKS cluster"
value = module.eks.cluster_name
}
output "cluster_oidc_issuer_url" {
description = "The URL on the EKS cluster for the OpenID Connect identity provider"
value = module.eks.cluster_oidc_issuer_url
}
output "cluster_platform_version" {
description = "Platform version for the cluster"
value = module.eks.cluster_platform_version
}
output "cluster_status" {
description = "Status of the EKS cluster. One of `CREATING`, `ACTIVE`, `DELETING`, `FAILED`"
value = module.eks.cluster_status
}
output "cluster_primary_security_group_id" {
description = "Cluster security group that was created by Amazon EKS for the cluster. Managed node groups use this security group for control-plane-to-data-plane communication. Referred to as 'Cluster security group' in the EKS console"
value = module.eks.cluster_primary_security_group_id
}
output "cluster_service_cidr" {
description = "The CIDR block where Kubernetes pod and service IP addresses are assigned from"
value = module.eks.cluster_service_cidr
}
output "cluster_ip_family" {
description = "The IP family used by the cluster (e.g. `ipv4` or `ipv6`)"
value = module.eks.cluster_ip_family
}
################################################################################
# Access Entry
################################################################################
output "access_entries" {
description = "Map of access entries created and their attributes"
value = module.eks.access_entries
}
################################################################################
# KMS Key
################################################################################
output "kms_key_arn" {
description = "The Amazon Resource Name (ARN) of the key"
value = module.eks.kms_key_arn
}
output "kms_key_id" {
description = "The globally unique identifier for the key"
value = module.eks.kms_key_id
}
output "kms_key_policy" {
description = "The IAM resource policy set on the key"
value = module.eks.kms_key_policy
}
################################################################################
# Security Group
################################################################################
output "cluster_security_group_arn" {
description = "Amazon Resource Name (ARN) of the cluster security group"
value = module.eks.cluster_security_group_arn
}
output "cluster_security_group_id" {
description = "ID of the cluster security group"
value = module.eks.cluster_security_group_id
}
################################################################################
# Node Security Group
################################################################################
output "node_security_group_arn" {
description = "Amazon Resource Name (ARN) of the node shared security group"
value = module.eks.node_security_group_arn
}
output "node_security_group_id" {
description = "ID of the node shared security group"
value = module.eks.node_security_group_id
}
################################################################################
# IRSA
################################################################################
output "oidc_provider" {
description = "The OpenID Connect identity provider (issuer URL without leading `https://`)"
value = module.eks.oidc_provider
}
output "oidc_provider_arn" {
description = "The ARN of the OIDC Provider if `enable_irsa = true`"
value = module.eks.oidc_provider_arn
}
output "cluster_tls_certificate_sha1_fingerprint" {
description = "The SHA1 fingerprint of the public key of the cluster's certificate"
value = module.eks.cluster_tls_certificate_sha1_fingerprint
}
################################################################################
# IAM Role
################################################################################
output "cluster_iam_role_name" {
description = "IAM role name of the EKS cluster"
value = module.eks.cluster_iam_role_name
}
output "cluster_iam_role_arn" {
description = "IAM role ARN of the EKS cluster"
value = module.eks.cluster_iam_role_arn
}
output "cluster_iam_role_unique_id" {
description = "Stable and unique string identifying the IAM role"
value = module.eks.cluster_iam_role_unique_id
}
################################################################################
# EKS Addons
################################################################################
output "cluster_addons" {
description = "Map of attribute maps for all EKS cluster addons enabled"
value = module.eks.cluster_addons
}
################################################################################
# EKS Identity Provider
################################################################################
output "cluster_identity_providers" {
description = "Map of attribute maps for all EKS identity providers enabled"
value = module.eks.cluster_identity_providers
}
################################################################################
# CloudWatch Log Group
################################################################################
output "cloudwatch_log_group_name" {
description = "Name of cloudwatch log group created"
value = module.eks.cloudwatch_log_group_name
}
output "cloudwatch_log_group_arn" {
description = "Arn of cloudwatch log group created"
value = module.eks.cloudwatch_log_group_arn
}
################################################################################
# Fargate Profile
################################################################################
output "fargate_profiles" {
description = "Map of attribute maps for all EKS Fargate Profiles created"
value = module.eks.fargate_profiles
}
################################################################################
# EKS Managed Node Group
################################################################################
output "eks_managed_node_groups" {
description = "Map of attribute maps for all EKS managed node groups created"
value = module.eks.eks_managed_node_groups
}
output "eks_managed_node_groups_autoscaling_group_names" {
description = "List of the autoscaling group names created by EKS managed node groups"
value = module.eks.eks_managed_node_groups_autoscaling_group_names
}
################################################################################
# Self Managed Node Group
################################################################################
output "self_managed_node_groups" {
description = "Map of attribute maps for all self managed node groups created"
value = module.eks.self_managed_node_groups
}
output "self_managed_node_groups_autoscaling_group_names" {
description = "List of the autoscaling group names created by self-managed node groups"
value = module.eks.self_managed_node_groups_autoscaling_group_names
}

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terraform {
required_version = ">= 1.3.2"
required_providers {
aws = {
source = "hashicorp/aws"
version = ">= 5.40"
}
}
}