Cluster on Hetzner

In this section we show you how to use the hetzner terraform module to setup your own infrastructure on hetzner provider.

Setup Project

You can use our hcloud template to create a repository. Click on the Use this template link on the repo.

Name the module and simply clone the repository down.

Let’s begin by cloning our repository we created using the template.

git clone [email protected]:<your-organization>/<your-repo>.git

Cluster Bootstrap

Once you’ve cloned down the repository simply replace the cluster_name with the desired name for your cluster. You can also update the node_size and the size parameter in the cluster_topology based on the value you wish to use from list of slugs from hcloud.

Once you’ve updated the values create a .auto.tfvars and add your tokens.

hcloud_token = <your hetzner api token>
instellar_auth_token = <your instellar auth token>

You can get the instellar_auth_token by signing up and heading over to the Credentials page on instellar.

SSH Key

This section assumes you already know how to generate the ssh-key. If you don’t know how to do this I recommend this post. To add the ssh-key to Hetzner. Head to the Security area. Under your project. Click on the Add SSH Key button.

You will see the following modal box. You can copy your public key into the box and give the key a name. You can copy the public key by running

cat ~/.ssh/id_ed25519.pub

This will print out your public key and you can copy it and paste it as the content of the key. The name is important you’ll need to use it in the main.tf file.

Once you add the key, you can refrence the name inside the main.tf file.

API Token

Before you push to your repository let’s look at how we can retrieve the API token to be used with Hetzner cloud on terraform cloud.

Head over to the Security section under the project. Then Click on the API tokens tab.

Go ahead and click the Generate API Token, you’ll be prompted with the following. Make sure you select Read & Write. Give it a recognizable name like Terraform.

You’ll get to see the token once. Copy it and either use it in your .auto.tfvars or your terraform cloud.

Running Locally via CLI

If you’re planning on running terraform locally, you can create a .auto.tfvars file and add the variable there. This file will only exist locally on your machine and will not be checked into your github repo.

hcloud_token = "<your-hcloud-token>"

If you use the template above the .auto.tfvars is automatically ignored.

Once all the configuration files are in place simply run:

terraform init
terraform plan
terraform apply