Setup - HCloud

Setting up a Kubernetes Cluster with Hetzner Cloud (hcloud)

Deploy an umnanaged Kubernetes cluster in hcloud

This approach is only recommended for experienced operators because the kubernetes control plane among other things needs to be managed manually.

Requirements

1. hcloud account

2. hcloud and hcloud credentials configured

3. kubectl

4. ansible

LINUX/MAC is the preferred method of setup.

Windows should choose either:

1. Deploy a THORNode from a Linux VPS.

2. Use Windows Subsystem for Linux - https://docs.microsoft.com/en-us/windows/wsl/about****

Steps

Firstly, clone and enter the cluster-launcher repository. All commands in this section are to be run inside this repo.

git clone https://gitlab.com/thorchain/devops/cluster-launcher
cd cluster-launcher

Then install the terraform CLI:

LINUX/MAC

Install Terraform:

brew install terraform

hcloud CLI

The hcloud CLI allows you to manage your hcloud services.

LINUX/MAC

Use the package manager homebrew to install the hcloud CLI.

brew install hcloud
hcloud context create <project_name>

You will be asked for you Personal Access Token with read/write priveleges (retrieve from API Panel from the hcloud web console.)

API -> Tokens/Keys -> Create Token.

Make sure you handle your secrets securely!

Kubernetes Control Tool

You must install and configure the Kubernetes CLI tool (kubectl). **To install kubectl** , follow these instructions, or choose a package manager based on your operating system.

LINUX/MAC

Use the package manager homebrew to install kubectl.

brew install kubernetes-cli

wget && jq

You also need wget and jq, follow these instructions, or choose a package manager based on your operating system.

LINUX/MAC

Use the package manager homebrew to install wget and jq Note: You most likely have these installed already.

brew install wget
brew install jq

Environment

Initialize the git submodule.

git submodule update --init

Use direnv, venv or whatever you prefer to manage a python environment inside the hcloud folder.

# Optional
(cd hcloud && direnv allow)

# Optional
(cd hcloud && virtualenv -p python3 venv)

Install dependencies required by Python and Ansible Galaxy.

(cd hcloud && pip install -r ansible/requirements.txt)
(cd hcloud && ansible-galaxy install -r ansible/requirements.yml)

Deploy Kubernetes Cluster

Use the commands below to deploy an hcloud cluster:

make hcloud

During the deploy, you will be asked to enter information about your cluster:

var.name
  The base name used for all resources

  Enter a value: tc-k8s

var.token
  Hetzner Cloud API token

  Enter a value: <secret>

var.user_name
  The admin user name for the nodes

  Enter a value: admin

• Name

• Token

• Confirm yes

Deploying a cluster takes ~15 minutes

Quotas

If necessary, request a quota increase here.

CONFIGURE

Now that you've provisioned your hcloud cluster, you need to configure kubectl. Customize the following command with your cluster name and resource group. It will get the access credentials for your cluster and automatically configure kubectl.

(cd hcloud && scp $(terraform output -raw hcloud_config) ~/.kube/config-hcloud)

# Merge it and set current context
KUBECONFIG=~/.kube/config:~/.kube/config-hcloud kubectl config view --flatten > ~/.kube/tmpcfg && mv -f ~/.kube/tmpcfg ~/.kube/config && kubectl config use-context $(kubectl config current-context --kubeconfig=$HOME/.kube/config-hcloud)

kubectl version

You are now ready to deploy a THORNode.