Terraform S3 Backend

README.md

Testing the S3 backend + DynamoDB locking

1. Clone this gist and change directory to it
2. Rename run-2nd.tf to an alternative file ending to prevent it being run.
3. terraform init
4. Normally you would plan and save to a file but for this example we're going to just apply directly terraform apply
5. Rename run-2nd.tf back to it's original name
6. The backend has changed so requires a new terraform init
7. terraform apply

run-1st.tf

# This uses Terraform to configure the resources required for remote state
provider "aws" {
  region = "us-east-1"
}

resource "aws_s3_bucket" "state" {
  bucket = "rowleyaj-tf-state-demo"
  
  tags {
    Name        = "rowleyaj-tf-state-demo"
    Environment = "testing"
  }
}

resource "aws_dynamodb_table" "state" {
  name           = "rowleyaj-terraform-state-lock"
  read_capacity  = 5
  write_capacity = 5
  hash_key       = "LockID"

  attribute {
    name = "LockID"
    type = "S"
  }

  tags {
    Name        = "rowleyaj-terraform-state-lock"
    Environment = "testing"
  }
}

resource "null_resource" "sleep" {
  provisioner "local-exec" {
    command = "sleep 10"
  }
}

run-2nd.tf

# This doesn't need to be it's own file but I've seperated it out to show the 
#   process used during this test. Either add this as separate file or append
#   to the file above and re-run
terraform {
  required_version = "~> 0.10"

  backend "s3" {
    bucket  = "rowleyaj-tf-state-demo"
    key     = "v1/terraform-remote-state-example"
    region  = "us-east-1"
    encrypt = true

    dynamodb_table = "rowleyaj-terraform-state-lock"
  }
}