Terraform AWS EKS Cluster Deployment Error - amazon-web-services

Question

I have been trying to deploy an EKS cluster within us-east-1 region and I see that one of the availability zone us-east-1e does not support the setup due to which my cluster fails to create.
Please see the error below and let me know if there is a way to skip us-east-1e AZ within terraform deployment.
Plan: 26 to add, 0 to change, 0 to destroy.
This plan was saved to: development.tfplan
To perform exactly these actions, run the following command to apply:
terraform apply "development.tfplan"
(base) _C0DL:deploy-eks-cluster-using-terraform-master snadella001$
terraform apply
"development.tfplan"data.aws_availability_zones.available_azs:
Reading... [id=2020-12-04 22:10:40.079079 +0000 UTC]
data.aws_availability_zones.available_azs: Read complete after 0s
[id=2020-12-04 22:10:47.208548 +0000 UTC]
module.eks-cluster.aws_eks_cluster.this[0]: Creating...
Error: error creating EKS Cluster (eks-ha):
UnsupportedAvailabilityZoneException: Cannot create cluster 'eks-hia'
because us-east-1e, the targeted availability zone, does not currently
have sufficient capacity to support the cluster. Retry and choose from
these availability zones: us-east-1a, us-east-1b, us-east-1c,
us-east-1d, us-east-1f { RespMetadata: {
StatusCode: 400,
RequestID: "0f2ddbd1-107f-490e-b45f-6985e1c7f1f8" }, ClusterName: "eks-ha", Message_: "Cannot create cluster 'eks-hia'
because us-east-1e, the targeted availability zone, does not currently
have sufficient capacity to support the cluster. Retry and choose from
these availability zones: us-east-1a, us-east-1b, us-east-1c,
us-east-1d, us-east-1f", ValidZones: [
"us-east-1a",
"us-east-1b",
"us-east-1c",
"us-east-1d",
"us-east-1f" ] }
on .terraform/modules/eks-cluster/cluster.tf line 9, in resource
"aws_eks_cluster" "this": 9: resource "aws_eks_cluster" "this" {
Please find the EKS cluster listed below:
# create EKS cluster
module "eks-cluster" {
source = "terraform-aws-modules/eks/aws"
version = "12.1.0"
cluster_name = var.cluster_name
cluster_version = "1.17"
write_kubeconfig = false
availability-zones = ["us-east-1a", "us-east-1b", "us-east-1c"]## tried but does not work
subnets = module.vpc.private_subnets
vpc_id = module.vpc.vpc_id
worker_groups_launch_template = local.worker_groups_launch_template
# map developer & admin ARNs as kubernetes Users
map_users = concat(local.admin_user_map_users, local.developer_user_map_users)
}
# get EKS cluster info to configure Kubernetes and Helm providers
data "aws_eks_cluster" "cluster" {
name = module.eks-cluster.cluster_id
}
data "aws_eks_cluster_auth" "cluster" {
name = module.eks-cluster.cluster_id
}
#################
# Private subnet
#################
resource "aws_subnet" "private" {
count = var.create_vpc && length(var.private_subnets) > 0 ? length(var.private_subnets) : 0
vpc_id = local.vpc_id
cidr_block = var.private_subnets[count.index]
# availability_zone = ["us-east-1a", "us-east-1b", "us-east-1c"]
availability_zone = length(regexall("^[a-z]{2}-", element(var.azs, count.index))) > 0 ? element(var.azs, count.index) : null
availability_zone_id = length(regexall("^[a-z]{2}-", element(var.azs, count.index))) == 0 ? element(var.azs, count.index) : null
assign_ipv6_address_on_creation = var.private_subnet_assign_ipv6_address_on_creation == null ? var.assign_ipv6_address_on_creation : var.private_subnet_assign_ipv6_address_on_creation
ipv6_cidr_block = var.enable_ipv6 && length(var.private_subnet_ipv6_prefixes) > 0 ? cidrsubnet(aws_vpc.this[0].ipv6_cidr_block, 8, var.private_subnet_ipv6_prefixes[count.index]) : null
tags = merge(
{
"Name" = format(
"%s-${var.private_subnet_suffix}-%s",
var.name,
element(var.azs, count.index),
)
},
var.tags,
var.private_subnet_tags,
)
}
variable "azs" {
description = "A list of availability zones names or ids in the region"
type = list(string)
default = []
#default = ["us-east-1a", "us-east-1b","us-east-1c","us-east-1d"]
}

Answer 1

module "vpc" {
source = "terraform-aws-modules/vpc/aws"
version = "2.44.0"
name = "${var.name_prefix}-vpc"
cidr = var.main_network_block
# azs = data.aws_availability_zones.available_azs.names
azs = ["us-east-1a", "us-east-1b", "us-east-1c"]
private_subnets = [
# this loop will create a one-line list as ["10.0.0.0/20", "10.0.16.0/20", "10.0.32.0/20", ...]
# with a length depending on how many Zones are available
for zone_id in data.aws_availability_zones.available_azs.zone_ids :
cidrsubnet(var.main_network_block, var.subnet_prefix_extension, tonumber(substr(zone_id, length(zone_id) - 1, 1)) - 1)
]