Rancher on Hetzner Cloud

This repository contains Terraform templates for deploying a highly available RKE cluster on Hetzner Cloud and installing Rancher into it. The Rancher installation can be used to create more clusters using the Hetzner UI Driver.

Please feel free to make contributions or use this for your own projects.

Running the Scripts

First, take the terraform.tfvars.example and make your configuration. After this, you're ready to run.

# Initalizing the module
terraform init

# Creating the cluster
terraform apply -target=module.cluster_init

# Installing Cert-Manager and Rancher
terraform apply -target=module.rancher_init

# Create default node templates
terraform apply -target=module.node_init

Project Structure

This Project consists of three modules. The module-cluster-init is for creating a basic RKE-Cluster on Hetzner Cloud, including server provisioning. The module-rancher-init is for installing Cert-Manager and Rancher on top of your provisioned cluster. The module-node-init creates Node Templates for Hetzner Cloud on your newly created Rancher instance.

Why is this divided into modules?

First, there is a bug in the Terraform k8s-provider. The existence of the kubeconfig-file is checked at planning phase. Unfortunately, that does not work because the cluster did not exist in planning phase.

Second, this gives you the possibility to create a DNS-Entry for the Load Balancer. This step could be automated, but my personal domain is not at a DNS provider which has an API to automate this.

Next Steps

At the moment, there is no integration for the hcloud-controller-manager or their CSI driver. This could be added to provide a tighter integration to the Hetzner Cloud Environment.

Also, i want to add a module to perform the installation of the Hetzner UI Driver

Maybe some of this code can be used to create a more generic Terraform project to build production ready RKE clusters on Hetzner.