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feat: add AWS load balancer controller to EKS template #9

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merged 1 commit into from
Jul 2, 2025
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feat: add AWS load balancer controller to EKS template #9

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86 changes: 78 additions & 8 deletions config/samples/workspacetemplates/eks-controlplane-template-without-karpenter.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -66,26 +66,26 @@ spec:
Terraform = "true"
}
}

module "kms" {
source = "terraform-aws-modules/kms/aws"
version = "~> 2.1"
source = "terraform-aws-modules/kms/aws"
version = "~> 2.1"
description = "${var.cluster_name} cluster encryption key"
enable_default_policy = true
key_owners = [data.aws_caller_identity.current.arn]
tags = local.tags
tags = local.tags
}

module "eks" {
source = "terraform-aws-modules/eks/aws"
version = "~> 20.29"
source = "terraform-aws-modules/eks/aws"
version = "~> 20.29"
cluster_name = var.cluster_name
cluster_version = var.kubernetes_version
# Give the Terraform identity admin access to the cluster
# which will allow it to deploy resources into the cluster
enable_cluster_creator_admin_permissions = true
cluster_endpoint_public_access = true
create_kms_key = false
create_kms_key = false
cluster_encryption_config = {
resources = ["secrets"]
provider_key_arn = module.kms.key_arn
Expand Down Expand Up @@ -184,6 +184,76 @@ spec:
tags = local.tags
}

# aws load balancer controller

locals {
aws_load_balancer_controller_version = "v2.10.1"
}
data "http" "aws_load_balancer_controller_iam_policy" {
url = "https://raw.githubusercontent.com/kubernetes-sigs/aws-load-balancer-controller/${local.aws_load_balancer_controller_version}/docs/install/iam_policy.json"
}

resource "aws_iam_policy" "aws_load_balancer_controller" {
name = "AWSLoadBalancerControllerPolicy"
description = "IAM policy for AWS Load Balancer Controller"
policy = jsonencode(data.http.aws_load_balancer_controller_iam_policy)
}

resource "aws_iam_role" "aws_load_balancer_controller" {
name = "aws-load-balancer-controller-role"
assume_role_policy = jsonencode({
Version = "2012-10-17"
Statement = [
{
Effect = "Allow"
Principal = {
Service = "eks.amazonaws.com"
}
Action = "sts:AssumeRoleWithWebIdentity"
Condition = {
StringEquals = {
"oidc.eks.amazonaws.com/id/<OIDC_PROVIDER>:sub" = "system:serviceaccount:kube-system:aws-load-balancer-controller"
}
}
}
]
})
}

resource "aws_iam_role_policy_attachment" "aws_load_balancer_controller" {
role = aws_iam_role.aws_load_balancer_controller.name
policy_arn = aws_iam_policy.aws_load_balancer_controller.arn
}

resource "aws_eks_pod_identity_association" "aws_load_balancer_controller" {
cluster_name = module.eks.cluster_name
namespace = "kube-system"
service_account = "aws-load-balancer-controller"
role_arn = aws_iam_role.aws_load_balancer_controller.arn
}

resource "helm_release" "aws_load_balancer_controller" {
name = "aws-load-balancer-controller"
chart = "aws-load-balancer-controller"
repository = "https://aws.github.io/eks-charts"
version = local.aws_load_balancer_controller_version
namespace = "aws-load-balancer-controller"

set {
name = "clusterName"
value = var.cluster_name
}

set {
name = "serviceAccount.name"
value = "aws-load-balancer-controller"
}

depends_on = [
aws_eks_pod_identity_association.aws_load_balancer_controller
]
}

output "cluster_endpoint" {
description = "Endpoint for EKS control plane"
value = module.eks.cluster_endpoint
Expand Down Expand Up @@ -216,7 +286,7 @@ spec:
role = "${module.eks.cluster_name}-node"
}
discovery_tag = {
key = "karpenter.sh/discovery"
key = "karpenter.sh/discovery"
value = module.eks.cluster_name
}
queue_name = module.karpenter.queue_name
Expand Down