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cluster-autoscaler.tf
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cluster-autoscaler.tf
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locals {
cluster-autoscaler = merge(
local.helm_defaults,
{
name = local.helm_dependencies[index(local.helm_dependencies.*.name, "cluster-autoscaler")].name
chart = local.helm_dependencies[index(local.helm_dependencies.*.name, "cluster-autoscaler")].name
repository = local.helm_dependencies[index(local.helm_dependencies.*.name, "cluster-autoscaler")].repository
chart_version = local.helm_dependencies[index(local.helm_dependencies.*.name, "cluster-autoscaler")].version
namespace = "cluster-autoscaler"
service_account_name = "cluster-autoscaler"
create_iam_resources_irsa = true
enabled = false
version = "v1.21.1"
iam_policy_override = null
default_network_policy = true
name_prefix = "${var.cluster-name}-cluster-autoscaler"
},
var.cluster-autoscaler
)
values_cluster-autoscaler = <<VALUES
nameOverride: "${local.cluster-autoscaler["name"]}"
autoDiscovery:
clusterName: ${var.cluster-name}
awsRegion: ${data.aws_region.current.name}
rbac:
create: true
serviceAccount:
name: ${local.cluster-autoscaler["service_account_name"]}
annotations:
eks.amazonaws.com/role-arn: "${local.cluster-autoscaler["enabled"] && local.cluster-autoscaler["create_iam_resources_irsa"] ? module.iam_assumable_role_cluster-autoscaler.iam_role_arn : ""}"
image:
repository: k8s.gcr.io/autoscaling/cluster-autoscaler
tag: ${local.cluster-autoscaler["version"]}
extraArgs:
balance-similar-node-groups: true
skip-nodes-with-local-storage: false
balancing-ignore-label_1: topology.ebs.csi.aws.com/zone
balancing-ignore-label_2: eks.amazonaws.com/nodegroup
balancing-ignore-label_3: eks.amazonaws.com/nodegroup-image
balancing-ignore-label_4: eks.amazonaws.com/sourceLaunchTemplateId
balancing-ignore-label_5: eks.amazonaws.com/sourceLaunchTemplateVersion
serviceMonitor:
enabled: ${local.kube-prometheus-stack["enabled"] || local.victoria-metrics-k8s-stack["enabled"]}
namespace: ${local.cluster-autoscaler["namespace"]}
priorityClassName: ${local.priority-class["create"] ? kubernetes_priority_class.kubernetes_addons[0].metadata[0].name : ""}
VALUES
}
module "iam_assumable_role_cluster-autoscaler" {
source = "terraform-aws-modules/iam/aws//modules/iam-assumable-role-with-oidc"
version = "~> 5.0"
create_role = local.cluster-autoscaler["enabled"] && local.cluster-autoscaler["create_iam_resources_irsa"]
role_name = local.cluster-autoscaler["name_prefix"]
provider_url = replace(var.eks["cluster_oidc_issuer_url"], "https://", "")
role_policy_arns = local.cluster-autoscaler["enabled"] && local.cluster-autoscaler["create_iam_resources_irsa"] ? [aws_iam_policy.cluster-autoscaler[0].arn] : []
number_of_role_policy_arns = 1
oidc_fully_qualified_subjects = ["system:serviceaccount:${local.cluster-autoscaler["namespace"]}:${local.cluster-autoscaler["service_account_name"]}"]
tags = local.tags
}
resource "aws_iam_policy" "cluster-autoscaler" {
count = local.cluster-autoscaler["enabled"] && local.cluster-autoscaler["create_iam_resources_irsa"] ? 1 : 0
name = local.cluster-autoscaler["name_prefix"]
policy = local.cluster-autoscaler["iam_policy_override"] == null ? data.aws_iam_policy_document.cluster-autoscaler.json : local.cluster-autoscaler["iam_policy_override"]
tags = local.tags
}
data "aws_iam_policy_document" "cluster-autoscaler" {
statement {
sid = "clusterAutoscalerAll"
effect = "Allow"
actions = [
"autoscaling:DescribeAutoScalingGroups",
"autoscaling:DescribeAutoScalingInstances",
"autoscaling:DescribeLaunchConfigurations",
"autoscaling:DescribeTags",
"ec2:DescribeInstanceTypes",
"ec2:DescribeLaunchTemplateVersions",
]
resources = ["*"]
}
statement {
sid = "clusterAutoscalerOwn"
effect = "Allow"
actions = [
"autoscaling:SetDesiredCapacity",
"autoscaling:TerminateInstanceInAutoScalingGroup",
"autoscaling:UpdateAutoScalingGroup",
]
resources = ["*"]
condition {
test = "StringEquals"
variable = "autoscaling:ResourceTag/kubernetes.io/cluster/${var.cluster-name}"
values = ["owned"]
}
condition {
test = "StringEquals"
variable = "autoscaling:ResourceTag/k8s.io/cluster-autoscaler/enabled"
values = ["true"]
}
}
}
resource "kubernetes_namespace" "cluster-autoscaler" {
count = local.cluster-autoscaler["enabled"] ? 1 : 0
metadata {
labels = {
name = local.cluster-autoscaler["namespace"]
}
name = local.cluster-autoscaler["namespace"]
}
}
resource "helm_release" "cluster-autoscaler" {
count = local.cluster-autoscaler["enabled"] ? 1 : 0
repository = local.cluster-autoscaler["repository"]
name = local.cluster-autoscaler["name"]
chart = local.cluster-autoscaler["chart"]
version = local.cluster-autoscaler["chart_version"]
timeout = local.cluster-autoscaler["timeout"]
force_update = local.cluster-autoscaler["force_update"]
recreate_pods = local.cluster-autoscaler["recreate_pods"]
wait = local.cluster-autoscaler["wait"]
atomic = local.cluster-autoscaler["atomic"]
cleanup_on_fail = local.cluster-autoscaler["cleanup_on_fail"]
dependency_update = local.cluster-autoscaler["dependency_update"]
disable_crd_hooks = local.cluster-autoscaler["disable_crd_hooks"]
disable_webhooks = local.cluster-autoscaler["disable_webhooks"]
render_subchart_notes = local.cluster-autoscaler["render_subchart_notes"]
replace = local.cluster-autoscaler["replace"]
reset_values = local.cluster-autoscaler["reset_values"]
reuse_values = local.cluster-autoscaler["reuse_values"]
skip_crds = local.cluster-autoscaler["skip_crds"]
verify = local.cluster-autoscaler["verify"]
values = [
local.values_cluster-autoscaler,
local.cluster-autoscaler["extra_values"]
]
namespace = kubernetes_namespace.cluster-autoscaler.*.metadata.0.name[count.index]
depends_on = [
kubectl_manifest.prometheus-operator_crds
]
}
resource "kubernetes_network_policy" "cluster-autoscaler_default_deny" {
count = local.cluster-autoscaler["enabled"] && local.cluster-autoscaler["default_network_policy"] ? 1 : 0
metadata {
name = "${kubernetes_namespace.cluster-autoscaler.*.metadata.0.name[count.index]}-default-deny"
namespace = kubernetes_namespace.cluster-autoscaler.*.metadata.0.name[count.index]
}
spec {
pod_selector {
}
policy_types = ["Ingress"]
}
}
resource "kubernetes_network_policy" "cluster-autoscaler_allow_namespace" {
count = local.cluster-autoscaler["enabled"] && local.cluster-autoscaler["default_network_policy"] ? 1 : 0
metadata {
name = "${kubernetes_namespace.cluster-autoscaler.*.metadata.0.name[count.index]}-allow-namespace"
namespace = kubernetes_namespace.cluster-autoscaler.*.metadata.0.name[count.index]
}
spec {
pod_selector {
}
ingress {
from {
namespace_selector {
match_labels = {
name = kubernetes_namespace.cluster-autoscaler.*.metadata.0.name[count.index]
}
}
}
}
policy_types = ["Ingress"]
}
}
resource "kubernetes_network_policy" "cluster-autoscaler_allow_monitoring" {
count = local.cluster-autoscaler["enabled"] && local.cluster-autoscaler["default_network_policy"] ? 1 : 0
metadata {
name = "${kubernetes_namespace.cluster-autoscaler.*.metadata.0.name[count.index]}-allow-monitoring"
namespace = kubernetes_namespace.cluster-autoscaler.*.metadata.0.name[count.index]
}
spec {
pod_selector {
}
ingress {
ports {
port = "8085"
protocol = "TCP"
}
from {
namespace_selector {
match_labels = {
"${local.labels_prefix}/component" = "monitoring"
}
}
}
}
policy_types = ["Ingress"]
}
}