Kubernetes Cluster on DigitalOcean with Terraform

This repository contains Terraform code to provision a Kubernetes cluster with 4 nodes on DigitalOcean.

Prerequisites

• Terraform installed

• DigitalOcean API Token

Setup Instructions

1. Clone the Repository

   git clone https://github.com/arthurkretzer/digitalocean-k8s-iac.git
   cd digitalocean-k8s-iac

2. Configure Variables

   Create a env.tfvars file and add the following content:

   do_token = "your_digitalocean_token"
   region   = "nyc1"
   node_size = "s-2vcpu-2gb"

3. Use Terraform

   Create the cluster by initializing, planning and applying terraform.

   terraform init
   terraform plan -var-file="env.tfvars"
   terraform apply -var-file="env.tfvars"

Outputs

• Cluster ID: Cluster ID for doctl commands if necessary.
• Kubeconfig: Kubernetes configuration file located in ./kubeconfig.yaml for cluster access. It is auto added to your kubeconfig file, or execute manually the doctl command in https://cloud.digitalocean.com/kubernetes/clusters/your-k8s-cluster-id getting started.
• Cluster Endpoint: URL to access the Kubernetes API server.

Clean Up

To destroy the infrastructure and avoid charges:

terraform destroy -var-file=env.tfvars

Note: In some cases, the worker droplets might not be automatically destroyed. If this happens, manually delete them from the DigitalOcean dashboard or use the CLI:

Install and Configure DigitalOcean CLI (doctl)

1. Install doctl

   Follow the documentation here.

2. Authenticate with your API token:

   doctl auth init

   Follow the prompt and enter your DigitalOcean API token.

3. List and delete droplets:

   doctl compute droplet list
   # Identify and delete the droplets
   for id in $(doctl compute droplet list --format ID --no-header); do doctl compute droplet delete $id --force; done

Using Makefile

If you have make installed, you can use:

make clean

This will destroy the k8s cluster and all droplets in your digital ocean account.

License

This project is licensed under the Apache License v2.0.