add toggle to disable traefik & metric server
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@ -37,7 +37,7 @@ _Please note that we are not affiliated to Hetzner, this is just an open source
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- Proper use of the underlying Hetzner private network to remove the need for encryption and minimize latency.
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- Automatic HA with the default setting of three control-plane and two agents nodes.
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- Ability to add or remove as many nodes as you want while the cluster stays running.
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- Automatic Traefik ingress controller attached to a Hetzner load balancer with proxy protocol turned on.
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- (Optional) Traefik ingress controller attached to a Hetzner load balancer with proxy protocol turned on.
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- (Optional) Out of the box config of Traefik with SSL certficate auto-generation.
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_It uses Terraform to deploy as it's easy to use, and Hetzner provides a great [Hetzner Terraform Provider](https://registry.terraform.io/providers/hetznercloud/hcloud/latest/docs)._
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8
init.tf
8
init.tf
@ -13,7 +13,7 @@ resource "null_resource" "first_control_plane" {
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token = random_password.k3s_token.result
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cluster-init = true
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disable-cloud-controller = true
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disable = concat(["local-storage"], local.is_single_node_cluster ? [] : ["servicelb"])
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disable = concat(["local-storage"], local.is_single_node_cluster ? [] : ["servicelb"], var.traefik_enabled ? [] : ["traefik"], var.metric_server_enabled ? [] : ["metric-server"])
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flannel-iface = "eth1"
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kubelet-arg = "cloud-provider=external"
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node-ip = module.control_planes[0].private_ipv4_address
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@ -79,7 +79,7 @@ resource "null_resource" "kustomization" {
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"https://raw.githubusercontent.com/hetznercloud/csi-driver/${local.csi_version}/deploy/kubernetes/hcloud-csi.yml",
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"https://github.com/weaveworks/kured/releases/download/${local.kured_version}/kured-${local.kured_version}-dockerhub.yaml",
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"https://raw.githubusercontent.com/rancher/system-upgrade-controller/master/manifests/system-upgrade-controller.yaml",
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], local.is_single_node_cluster ? [] : ["traefik.yaml"]),
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], local.is_single_node_cluster ? [] : var.traefik_enabled ? ["traefik.yaml"] : []),
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patchesStrategicMerge = [
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file("${path.module}/kustomize/kured.yaml"),
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file("${path.module}/kustomize/ccm.yaml"),
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@ -91,7 +91,7 @@ resource "null_resource" "kustomization" {
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# Upload traefik config
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provisioner "file" {
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content = local.is_single_node_cluster ? "" : templatefile(
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content = local.is_single_node_cluster ? "" : var.traefik_enabled == false ? "" : templatefile(
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"${path.module}/templates/traefik_config.yaml.tpl",
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{
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name = "${var.cluster_name}-traefik"
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@ -142,7 +142,7 @@ resource "null_resource" "kustomization" {
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"kubectl -n system-upgrade wait --for=condition=available --timeout=120s deployment/system-upgrade-controller",
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"kubectl -n system-upgrade apply -f /tmp/post_install/plans.yaml"
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],
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local.is_single_node_cluster ? [] : [<<-EOT
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local.is_single_node_cluster ? [] : var.traefik_enabled == false ? [] : [<<-EOT
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timeout 120 bash <<EOF
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until [ -n "\$(kubectl get -n kube-system service/traefik --output=jsonpath='{.status.loadBalancer.ingress[0].ip}' 2> /dev/null)" ]; do
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echo "Waiting for load-balancer to get an IP..."
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2
main.tf
2
main.tf
@ -56,7 +56,7 @@ resource "hcloud_placement_group" "k3s" {
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}
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data "hcloud_load_balancer" "traefik" {
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count = local.is_single_node_cluster ? 0 : 1
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count = local.is_single_node_cluster ? 0 : var.traefik_enabled == false ? 0 : 1
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name = "${var.cluster_name}-traefik"
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depends_on = [null_resource.kustomization]
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@ -17,7 +17,7 @@ output "agents_public_ipv4" {
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output "load_balancer_public_ipv4" {
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description = "The public IPv4 address of the Hetzner load balancer"
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value = local.is_single_node_cluster ? module.control_planes[0].ipv4_address : data.hcloud_load_balancer.traefik[0].ipv4
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value = local.is_single_node_cluster || var.traefik_enabled == false ? module.control_planes[0].ipv4_address : data.hcloud_load_balancer.traefik[0].ipv4
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}
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output "kubeconfig_file" {
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@ -5,7 +5,7 @@
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# This is in order to keep terraform from re-provisioning all nodes at once which would loose data. If you want to update,
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# those, you should instead change the value here and then manually re-provision each node one-by-one. Grep for "lifecycle".
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# * Your Hetzner project API token
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# * Your Hetzner project API token
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hcloud_token = "xxxxxxxxxxxxxxxxxxYYYYYYYYYYYYYYYYYYYzzzzzzzzzzzzzzzzzzzzz"
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# * Your public key
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public_key = "/home/username/.ssh/id_ed25519.pub"
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@ -63,10 +63,15 @@ load_balancer_type = "lb11"
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# hetzner_ccm_version = ""
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# hetzner_csi_version = ""
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# If you want to use traefik ingress controller with a loadbalancer
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# traefik_enabled = true
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# If you want to use letsencrypt with tls Challenge, the email address is used to send you certificates expiration notices
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# traefik_acme_tls = true
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# traefik_acme_email = "mail@example.com"
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# If you want to enable k8s metric server or not
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# metric_server_enabled = false
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# If you want to allow non-control-plane workloads to run on the control-plane nodes set "true" below. The default is "false".
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# Also good for single node clusters.
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# allow_scheduling_on_control_plane = true
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12
variables.tf
12
variables.tf
@ -80,6 +80,12 @@ variable "hetzner_csi_version" {
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description = "Version of Container Storage Interface driver for Hetzner Cloud"
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}
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variable "traefik_enabled" {
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type = bool
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default = false
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description = "Whether to enable or disbale k3s traefik installation"
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}
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variable "traefik_acme_tls" {
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type = bool
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default = false
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@ -98,6 +104,12 @@ variable "allow_scheduling_on_control_plane" {
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description = "Whether to allow non-control-plane workloads to run on the control-plane nodes"
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}
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variable "metric_server_enabled" {
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type = bool
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default = true
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description = "Whether to enable or disbale k3s mertric server"
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}
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variable "initial_k3s_channel" {
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type = string
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default = "stable"
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