0lehKondratov / terraform-digitalocean-k8s

Terraform module for creating a Kubernetes cluster on Digital Ocean with latest available version, kubeconfig file creation and addititonal node pool.

Terraform Kubernetes on Digital Ocean

This repository contains the Terraform module for creating a Kubernetes Cluster on Digital Ocean.

It uses the latest available Digital Ocean Kubernetes slug version available and creates a kubeconfig file at completion.

Link to my comprehensive blog post (beginner friendly):

https://napo.io/posts/terraform-kubernetes-multi-cloud-ack-aks-dok-eks-gke-oke/#digital-ocean

• Terraform Kubernetes on Digital Ocean
• Requirements
• Features
• Notes
• Defaults
• Runtime
• Terraform Inputs
• Outputs

Requirements

You need a Digital Ocean account and a Personal access token.

Features

• Always uses latest available Kubernetes version on Digital Ocean
• Kubernetes Cluster with 1 + 2 = 3 worker nodes (default node pool + additional node pool)
• kubeconfig file generation at completion

Notes

• The resources will be created in your default Digital Ocean project
• If you want to add/remove worker nodes, just edit the do_k8s_nodepool_size variable
• It can take 2-3 minutes after Terraform completes until the Kubernetes nodes are available
• export KUBECONFIG=./kubeconfig_do in repo root dir to use the generated kubeconfig file
• The enable_digitalocean is used in the hajowieland/terraform-kubernetes-multi-cloud module

Defaults

See tables at the end for a comprehensive list of inputs and outputs.

• Default region: fra1 (Frankfurt, Germany)
• Default Kubernetes version: 1.14.2-do.0
• Default Node type: s-1vcpu-2gb (1x vCPU, 2GB memory)
• Default main pool size: 1
• Default additional node pool size: 2

Runtime

Runtime terraform apply:

~5-7min

2.56s user
0.89s system
7:16.37 total

2.38s user
0.75s system
5:15.77 total

Terraform Inputs

Name	Description	Type	Default	Required
enable_digitalocean	Enable / Disable Digital Ocean	bool	true	yes
random_cluster_suffix	Random 6 byte hex suffix for cluster name	string		yes
do_k8s_nodes	Worker nodes	int	2	yes
do_token	Digital Ocean Personal access token	string	DUMMY	yes
do_region	Digital Ocean region	string	fra1	yes
do_k8s_name	Digital Ocean Kubernetes cluster name	string	k8s-do	yes
do_k8s_pool_name	Digital Ocean Kubernetes default node pool name	string	k8s-nodepool-do	yes
do_k8s_nodes	Digital Ocean Kubernetes default node pool size	number	1	yes
do_k8s_node_type	Digital Ocean Kubernetes default node pool type	string	s-1vcpu-2gb	yes
do_k8s_nodepool_type	Digital Ocean Kubernetes additional node pool type	string	s-1vcpu-2gb	yes
do_k8s_nodepool_size	Digital Ocean Kubernetes additional node pool size	number	2	yes

Outputs

Name	Description
kubeconfig_path_do	Kubernetes kubeconfig file