Terraform

Manage Cloud Infrastructure as code.

Install - Ubuntu 20.04/18.04/16.04

$ sudo apt-get update && sudo apt-get install -y gnupg software-properties-common
$ wget -O- https://apt.releases.hashicorp.com/gpg | \
    gpg --dearmor | \
    sudo tee /usr/share/keyrings/hashicorp-archive-keyring.gpg
$ gpg --no-default-keyring \
    --keyring /usr/share/keyrings/hashicorp-archive-keyring.gpg \
    --fingerprint
# If you are running Ubuntu 20.04 or earlier, than run this. 
$ echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] \
    https://apt.releases.hashicorp.com $(lsb_release -cs) main" | \
    sudo tee /etc/apt/sources.list.d/hashicorp.list
$ sudo apt update && sudo apt install -y terraform
$ terraform -help
$ terraform -install-autocomplete

Install - Ubuntu 20.04

$ sudo apt update
$ sudo apt install  software-properties-common gnupg2 curl
$ curl https://apt.releases.hashicorp.com/gpg | gpg --dearmor > hashicorp.gpg
$ sudo install -o root -g root -m 644 hashicorp.gpg /etc/apt/trusted.gpg.d/
$ sudo apt-add-repository "deb [arch=$(dpkg --print-architecture)] https://apt.releases.hashicorp.com focal main"
$ sudo apt update && sudo apt install -y terraform

Build infrastructure - AWS

# install aws cli and set environment variables
$ sudo apt install python3-pip
$ pip3 install awscli --upgrade --user
$ export AWS_ACCESS_KEY_ID=
$ export AWS_SECRET_ACCESS_KEY=
# Each Terraform must have its own working directory
$ mkdir learn-teraform-aws-instance
$ cd learn-terraform-aws-instance
$ vim main.tf
terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 4.16"
    }
  }

  required_version = ">= 1.2.0"
}

provider "aws" {
  region  = "us-west-2"
}

resource "aws_instance" "app_server" {
  ami = "ami-830c94e3"
  instance_type = "t2.micro"

  tags = {
    Name = "ExampleAppServerInstance"
  }
}

$ terraform init
$ terraform fmt
$ terraform validate
$ terraform apply
$ terraform show

Manually Manage

$ terraform state list

Terraform + YAML

https://aws.plainenglish.io/terraform-yaml-%EF%B8%8F-3550a3642dd3

Terrafrom + Starlark

# https://ascode.run/docs/
$ wget https://github.com/mcuadros/ascode/releases/download/v1.3.0/ascode-v1.3.0-linux-amd64.tar.gz
$ tar -xvzf ascode-v1.3.0-linux-amd64.tar.gz
$ mv ascode /usr/local/bin/

References

https://www.terraform.io/
https://learn.hashicorp.com/tutorials/terraform/aws-build?in=terraform/aws-get-started
https://www.digitalocean.com/community/tutorials/how-to-use-ansible-with-terraform-for-configuration-management
https://github.com/multycloud/multy