Terraform Workflow

Step-01: Introduction

Understand basic Terraform Commands

1. terraform init
2. terraform validate
3. terraform plan
4. terraform apply
5. terraform destroy

Step-02: Review terraform manifest for EC2 Instance

1. Pre-Conditions-1: Ensure you have default-vpc in that respective region
2. Pre-Conditions-2: Ensure AMI you are provisioning exists in that region if not update AMI ID
3. Pre-Conditions-3: Verify your AWS Credentials in $HOME/.aws/credentials

Terraform Settings Block

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      #version = "~> 3.21" # Optional but recommended in production
    }
  }
}

Provider Block

provider "aws" {
  profile = "default" # AWS Credentials Profile configured on your local desktop terminal  $HOME/.aws/credentials
  region  = "us-east-1"
}

Resource Block

resource "aws_instance" "ec2demo" {
  ami           = "ami-04d29b6f966df1537" # Amazon Linux in us-east-1, update as per your region
  instance_type = "t2.micro"
}

Step-03: Terraform Core Commands

Initialize Terraform

terraform init

Terraform Validate

terraform validate

Terraform Plan to Verify what it is going to create / update / destroy

terraform plan

Terraform Apply to Create EC2 Instance

terraform apply

Step-04: Verify the EC2 Instance in AWS Management Console

1. Go to AWS Management Console -> Services -> EC2
2. Verify newly created EC2 instance

Step-05: Destroy Infrastructure

Destroy EC2 Instance

terraform destroy

Delete Terraform files

1. rm -rf .terraform*
2. rm -rf terraform.tfstate*

Step-08: Conclusion

Learned about Important Terraform workflow Commands

1. terraform init
2. terraform validate
3. terraform plan
4. terraform apply
5. terraform destroy