Terraform module for creating K3S cluster using Hetzner cloud services.

module "infrastructure" {
 source  = "github.com/dmalykh/hetzner_k3s"
 
 hcloud_token = "${var.hcloud_token}"
 os = "ubuntu-22.04"
 location = "hel1"

 ssh_key = {
    public_key = "${var.public_key}"
    private_key = file("${var.private_key}")
 }

 master = {
    count = 3
    server_type = "cx21"
 }

 agent = {
    count = 6
    server_type = "cx11"
 }
}

resource "local_sensitive_file" "kubeconfig_file" {
    content = module.infrastructure.kube_config
    filename = "./.kubeconfig"
}

Requirements

Name	Version
hcloud	1.35.2

Providers

Name	Version
hcloud	1.35.2
kubernetes	n/a
template	n/a

Modules

Name	Source	Version
k3s	[email protected]:dmalykh/terraform-module-k3s.git	n/a

Resources

Name	Type
hcloud_network.private	resource
hcloud_network_subnet.private_subnet	resource
hcloud_server.agent	resource
hcloud_server.master	resource
hcloud_server_network.agent	resource
hcloud_server_network.master	resource
hcloud_ssh_key.default	resource
kubernetes_cluster_role_binding.boostrap	resource
kubernetes_service_account.bootstrap	resource
hcloud_image.os	data source
kubernetes_secret.sa_credentials	data source
template_file.init	data source

Inputs

Name	Description	Type	Default	Required
agent	Agent nodes	object({ count = optional(number, 0) name = optional(string, "agent") server_type = string })	n/a	yes
cidr	K3s network CIDRs (see https://rancher.com/docs/k3s/latest/en/installation/install-options/).	object({ pods = string services = string })	{ "pods": "10.42.0.0/16", "services": "10.43.0.0/16" }	no
cloud-init	n/a	string	""	no
hcloud_token	n/a	string	n/a	yes
ipadd	Add to IP addresses sequesce to avoid zero-ip defenition	number	1	no
location	n/a	string	"hel1"	no
master	Control plane nodes	object({ count = optional(number, 0) name = optional(string, "master") server_type = string })	n/a	yes
networking	n/a	object({ name = optional(string, "private") ip_range = optional(string, "10.0.0.0/8") type = optional(string, "cloud") network_zone = optional(string, "eu-central") sub_ip_range = optional(string, "10.254.1.0/24") })	{}	no
os	Operating system that will be installed on a server	string	"ubuntu-22.04"	no
ssh_key	n/a	object({ name = optional(string, "default") public_key = string private_key = string })	n/a	yes

Outputs

Name	Description
bootstrap_sa	Bootstrap ServiceAccount. Can be used by Terraform to provision this cluster.
kube_config	n/a
summary	Output