Terraform configuration files for provisioning a basic Kubernetes infrastructure on Digital Ocean

Infrastructure summary

• 1 Droplet for a Kubernetes master node
• 2 Droplets for a Kubernetes worker nodes
• 1 VPC
• 1 Bucket
• 1 Container registry
• A Digital Ocean project that contains all of these resources

Terraform code structure

|--+ root module
   +- ssh module (generated locally or retrived from a ssh_key already provisioned)
   +- droplet module 
   +- tag module
   +- vpc module
   +- bucket module
   +- registry module
   +- project module

Basic usage

• It is possible to retrieve an existing ssh key stored in a Digital Ocean account, through a data source, or by generating it locally, just setting the variable "local_sshkey" to true. That ssh key allows access to all droplets via ssh.

variable "local_sshkey" {
  type        = bool
  description = "Determine whether to generate and load a local ssh_key, if set to true it does"
  default     = true
}

• Infrastructure plan and provision

> terraform init
> terraform plan -auto-approve
> terraform apply -auto-approve

• Infrastructure deletion

> terraform destroy 

Composition