Terraform

Terraform is an infrastructure as code (IaC) tool that lets you build, change, and version infrastructure safely and efficiently. This includes low-level components like compute instances, storage, and networking; and high-level components like DNS entries and SaaS features.

Infrastructure as Code (IaC) tools allow you to manage infrastructure - servers, networks, databases - with configuration files rather than through a graphical user interface. IaC allows you to build, change, and manage your infrastructure in a safe, consistent, and repeatable way by defining resource configurations that you can version, reuse, and share. 

terraform {
  required_providers {
    docker = {
      source  = "kreuzwerker/docker"
      version = "~> 3.0.1"
    }
  }
}

provider "docker" {}

resource "docker_image" "nginx" {
  name         = "nginx:latest"
  keep_locally = false
}

resource "docker_container" "nginx" {
  image = docker_image.nginx.image_id
  name  = "tutorial"
  ports {
    internal = 80
    external = 8000
  }
}

Providers

Resources

The terraform block contains Terraform settings, including the required providers Terraform will use to provision the infrastructure.

The source attribute defines an optional hostname, a namespace, and the provider type. Terraform installs providers from the Terraform Registry by default. You can set a version constraint for each provider in the required_providers block. 

terraform init
terraform fmt
terraform validate
terraform apply