forked from terraform-aws-modules/terraform-aws-eks
/
cluster.tf
175 lines (152 loc) · 6.78 KB
/
cluster.tf
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resource "aws_cloudwatch_log_group" "this" {
count = length(var.cluster_enabled_log_types) > 0 && var.create_eks ? 1 : 0
name = "/aws/eks/${var.cluster_name}/cluster"
retention_in_days = var.cluster_log_retention_in_days
kms_key_id = var.cluster_log_kms_key_id
tags = var.tags
}
resource "aws_eks_cluster" "this" {
count = var.create_eks ? 1 : 0
name = var.cluster_name
enabled_cluster_log_types = var.cluster_enabled_log_types
role_arn = local.cluster_iam_role_arn
version = var.cluster_version
tags = var.tags
vpc_config {
security_group_ids = compact([local.cluster_security_group_id])
subnet_ids = var.subnets
endpoint_private_access = var.cluster_endpoint_private_access
endpoint_public_access = var.cluster_endpoint_public_access
public_access_cidrs = var.cluster_endpoint_public_access_cidrs
}
kubernetes_network_config {
service_ipv4_cidr = var.cluster_service_ipv4_cidr
}
timeouts {
create = var.cluster_create_timeout
delete = var.cluster_delete_timeout
}
dynamic "encryption_config" {
for_each = toset(var.cluster_encryption_config)
content {
provider {
key_arn = encryption_config.value["provider_key_arn"]
}
resources = encryption_config.value["resources"]
}
}
depends_on = [
aws_security_group_rule.cluster_egress_internet,
aws_security_group_rule.cluster_https_worker_ingress,
aws_iam_role_policy_attachment.cluster_AmazonEKSClusterPolicy,
aws_iam_role_policy_attachment.cluster_AmazonEKSServicePolicy,
aws_iam_role_policy_attachment.cluster_AmazonEKSVPCResourceControllerPolicy,
aws_cloudwatch_log_group.this
]
}
resource "aws_security_group" "cluster" {
count = var.cluster_create_security_group && var.create_eks ? 1 : 0
name_prefix = var.cluster_name
description = "EKS cluster security group."
vpc_id = var.vpc_id
tags = merge(
var.tags,
{
"Name" = "${var.cluster_name}-eks_cluster_sg"
},
)
}
resource "aws_security_group_rule" "cluster_egress_internet" {
count = var.cluster_create_security_group && var.create_eks ? 1 : 0
description = "Allow cluster egress access to the Internet."
protocol = "-1"
security_group_id = local.cluster_security_group_id
cidr_blocks = var.cluster_egress_cidrs
from_port = 0
to_port = 0
type = "egress"
}
resource "aws_security_group_rule" "cluster_https_worker_ingress" {
count = var.cluster_create_security_group && var.create_eks ? 1 : 0
description = "Allow pods to communicate with the EKS cluster API."
protocol = "tcp"
security_group_id = local.cluster_security_group_id
source_security_group_id = local.worker_security_group_id
from_port = 443
to_port = 443
type = "ingress"
}
resource "aws_security_group_rule" "cluster_private_access_cidrs_source" {
count = var.create_eks && var.cluster_create_endpoint_private_access_sg_rule && var.cluster_endpoint_private_access && var.cluster_endpoint_private_access_cidrs != null ? 1 : 0
description = "Allow private K8S API ingress from custom CIDR source."
type = "ingress"
from_port = 443
to_port = 443
protocol = "tcp"
cidr_blocks = var.cluster_endpoint_private_access_cidrs
security_group_id = aws_eks_cluster.this[0].vpc_config[0].cluster_security_group_id
}
resource "aws_security_group_rule" "cluster_private_access_sg_source" {
count = var.create_eks && var.cluster_create_endpoint_private_access_sg_rule && var.cluster_endpoint_private_access && var.cluster_endpoint_private_access_sg != null ? length(var.cluster_endpoint_private_access_sg) : 0
description = "Allow private K8S API ingress from custom Security Groups source."
type = "ingress"
from_port = 443
to_port = 443
protocol = "tcp"
source_security_group_id = var.cluster_endpoint_private_access_sg[count.index]
security_group_id = aws_eks_cluster.this[0].vpc_config[0].cluster_security_group_id
}
resource "aws_iam_role" "cluster" {
count = var.manage_cluster_iam_resources && var.create_eks ? 1 : 0
name_prefix = var.cluster_iam_role_name != "" ? null : var.cluster_name
name = var.cluster_iam_role_name != "" ? var.cluster_iam_role_name : null
assume_role_policy = data.aws_iam_policy_document.cluster_assume_role_policy.json
permissions_boundary = var.permissions_boundary
path = var.iam_path
force_detach_policies = true
tags = var.tags
}
resource "aws_iam_role_policy_attachment" "cluster_AmazonEKSClusterPolicy" {
count = var.manage_cluster_iam_resources && var.create_eks ? 1 : 0
policy_arn = "${local.policy_arn_prefix}/AmazonEKSClusterPolicy"
role = local.cluster_iam_role_name
}
resource "aws_iam_role_policy_attachment" "cluster_AmazonEKSServicePolicy" {
count = var.manage_cluster_iam_resources && var.create_eks ? 1 : 0
policy_arn = "${local.policy_arn_prefix}/AmazonEKSServicePolicy"
role = local.cluster_iam_role_name
}
resource "aws_iam_role_policy_attachment" "cluster_AmazonEKSVPCResourceControllerPolicy" {
count = var.manage_cluster_iam_resources && var.create_eks ? 1 : 0
policy_arn = "${local.policy_arn_prefix}/AmazonEKSVPCResourceController"
role = local.cluster_iam_role_name
}
/*
Adding a policy to cluster IAM role that allow permissions
required to create AWSServiceRoleForElasticLoadBalancing service-linked role by EKS during ELB provisioning
*/
data "aws_iam_policy_document" "cluster_elb_sl_role_creation" {
count = var.manage_cluster_iam_resources && var.create_eks ? 1 : 0
statement {
effect = "Allow"
actions = [
"ec2:DescribeAccountAttributes",
"ec2:DescribeInternetGateways",
"ec2:DescribeAddresses"
]
resources = ["*"]
}
}
resource "aws_iam_policy" "cluster_elb_sl_role_creation" {
count = var.manage_cluster_iam_resources && var.create_eks ? 1 : 0
name_prefix = "${var.cluster_name}-elb-sl-role-creation"
description = "Permissions for EKS to create AWSServiceRoleForElasticLoadBalancing service-linked role"
policy = data.aws_iam_policy_document.cluster_elb_sl_role_creation[0].json
path = var.iam_path
tags = var.tags
}
resource "aws_iam_role_policy_attachment" "cluster_elb_sl_role_creation" {
count = var.manage_cluster_iam_resources && var.create_eks ? 1 : 0
policy_arn = aws_iam_policy.cluster_elb_sl_role_creation[0].arn
role = local.cluster_iam_role_name
}