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eks-cluster.tf
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eks-cluster.tf
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locals {
standard_tags_asg_eks = concat(
local.standard_tags_asg,
[{
"key" = "k8s.io/cluster-autoscaler/enabled",
"value" = "true",
"propagate_at_launch" = "false"
},
{
"key" = "k8s.io/cluster-autoscaler/${local.env}",
"value" = "true",
"propagate_at_launch" = "false"
}]
)
}
module "eks" {
source = "terraform-aws-modules/eks/aws"
version = "17.15.0"
cluster_name = local.env
cluster_version = local.config.cluster_version
vpc_id = module.vpc.vpc_id
subnets = module.vpc.private_subnets
write_kubeconfig = false
cluster_endpoint_private_access = true
cluster_endpoint_public_access = true
worker_create_security_group = true
worker_create_cluster_primary_security_group_rules = true
enable_irsa = true
tags = local.standard_tags
node_groups_defaults = {
create_launch_template = true
ami_type = local.config.ami_type
disk_type = local.config.disk_type
disk_size = local.config.disk_size
ebs_optimized = true
}
node_groups = {
apps = {
version = local.config.cluster_version
desired_capacity = local.config.desired_capacity
min_capacity = local.config.min_capacity
max_capacity = local.config.max_capacity
instance_types = local.config.apps_instance_types
capacity_type = local.config.capacity_type
k8s_labels = local.standard_tags
subnets = [module.vpc.private_subnets[0]]
update_config = {
max_unavailable_percentage = local.config.max_unavailable_percentage # or set `max_unavailable`
}
}
apps2 = {
version = local.config.cluster_version
desired_capacity = local.config.desired_capacity
max_capacity = local.config.max_capacity
min_capacity = local.config.min_capacity
instance_types = local.config.apps_instance_types
capacity_type = local.config.capacity_type
k8s_labels = local.standard_tags
subnets = [module.vpc.private_subnets[1]]
update_config = {
max_unavailable_percentage = local.config.max_unavailable_percentage # or set `max_unavailable`
}
}
apps3 = {
version = local.config.cluster_version
desired_capacity = local.config.desired_capacity
max_capacity = local.config.max_capacity
min_capacity = local.config.min_capacity
instance_types = local.config.apps_instance_types
capacity_type = local.config.capacity_type
k8s_labels = local.standard_tags
subnets = [module.vpc.private_subnets[2]]
update_config = {
max_unavailable_percentage = local.config.max_unavailable_percentage # or set `max_unavailable`
}
}
# aenodes = {
# version = local.config.cluster_version
# desired_capacity = local.config.aenodes_desired_capacity
# max_capacity = local.config.aenodes_max_capacity
# min_capacity = local.config.aenodes_min_capacity
# instance_types = [local.config.aenodes_instance_type]
# capacity_type = local.config.capacity_type
# k8s_labels = local.standard_tags
# k8s_labels = merge(local.standard_tags, try(local.config.aenode_tags, {}))
# taints = try(local.config.aenode_taints, [])
# update_config = {
# max_unavailable_percentage = local.config.max_unavailable_percentage # or set `max_unavailable`
# }
# }
}
map_roles = [
{
rolearn = aws_iam_role.cluster_admin.arn
username = "cluster-admin"
groups = ["system:masters"]
}
]
}
resource "aws_eks_addon" "vpc_cni" {
cluster_name = module.eks.cluster_id
addon_name = "vpc-cni"
resolve_conflicts_on_create = "OVERWRITE"
resolve_conflicts_on_update = "OVERWRITE"
addon_version = "v1.18.1-eksbuild.3"
configuration_values = jsonencode({
env = {
# Reference docs https://docs.aws.amazon.com/eks/latest/userguide/cni-increase-ip-addresses.html
ENABLE_PREFIX_DELEGATION = "true"
WARM_PREFIX_TARGET = "1"
}
})
tags = local.standard_tags
}
resource "aws_eks_addon" "kube_proxy" {
cluster_name = module.eks.cluster_id
addon_name = "kube-proxy"
resolve_conflicts_on_create = "OVERWRITE"
resolve_conflicts_on_update = "OVERWRITE"
addon_version = "v1.30.0-eksbuild.3"
tags = local.standard_tags
}
resource "aws_eks_addon" "coredns" {
cluster_name = module.eks.cluster_id
addon_name = "coredns"
resolve_conflicts_on_create = "OVERWRITE"
resolve_conflicts_on_update = "OVERWRITE"
addon_version = "v1.11.1-eksbuild.8"
tags = local.standard_tags
}
resource "aws_eks_addon" "ebs_csi" {
cluster_name = module.eks.cluster_id
addon_name = "aws-ebs-csi-driver"
resolve_conflicts_on_create = "OVERWRITE"
resolve_conflicts_on_update = "OVERWRITE"
addon_version = "v1.32.0-eksbuild.1"
service_account_role_arn = module.aws-ebs-controller-role.iam_role_arn
tags = local.standard_tags
# configuration_values = jsonencode({
# resources = {
# limits = {
# cpu = "20m"
# memory = "60Mi"
# }
# requests = {
# cpu = "10m"
# memory = "40Mi"
# }
# }
# })
}
data "aws_eks_cluster" "cluster" {
name = module.eks.cluster_id
}
data "aws_eks_cluster_auth" "cluster" {
name = module.eks.cluster_id
}
provider "kubernetes" {
exec {
api_version = "client.authentication.k8s.io/v1beta1"
command = "aws"
args = [
"--region",
"eu-central-1",
"eks",
"get-token",
"--cluster-name",
module.eks.cluster_id,
"--role",
aws_iam_role.cluster_admin.arn
]
}
host = data.aws_eks_cluster.cluster.endpoint
cluster_ca_certificate = base64decode(data.aws_eks_cluster.cluster.certificate_authority.0.data)
token = data.aws_eks_cluster_auth.cluster.token
}