DOPS-101 Add bootstrap module for terraform project

Author: akagr

.gitignore

@@ -6,9 +6,9 @@
 .DS_Store
 .vagrant
 /env.sh
-/terraform/.terraform*
-/terraform/terraform.tfstate*
-/terraform/tf.plan
+/terraform/**/.terraform
+/terraform/**/terraform.tfstate*
+/terraform/**/tf.plan
 __pycache__
 build/
 tmp/

terraform/bootstrap/.terraform.lock.hcl

@@ -0,0 +1,44 @@
+# Modus Devops Demo Bootstrap
+
+This terraform module is used to bootstrap the backend for the `/terraform` project. It uses [trussworks/bootstrap/aws](https://github.com/trussworks/terraform-aws-bootstrap) module to create all the resources needed to enable terraform backend in AWS.
+
+## How to use
+
+```bash
+cd terraform/bootstrap
+terraform init
+terraform apply
+```
+
+This will generate output which looks like this:
+
+```
+backend_details = {
+  "dynamodb_table" = "moduscreate-devops-demo-state-lock"
+  "logging_bucket" = "moduscreate-devops-demo-tf-state-log-us-east-1"
+  "state_bucket" = "moduscreate-devops-demo-tf-state-us-east-1"
+}
+```
+
+It can then be used in the `terraform.backend` config of main project (not the bootstrap project).
+
+```terraform
+terraform {
+  # ... existing config
+
+  backend "s3" {
+    bucket = "moduscreate-devops-demo-tf-state-us-east-1"
+    key = "terraform-state.tfstate"
+    dynamodb_table = "moduscreate-devops-demo-state-lock"
+    region = "us-east-1"
+    encrypt = "true"
+  }
+}
+```
+
+## Inputs
+
+| Name            | Description                  | Default                 |
+|-----------------|------------------------------|-------------------------|
+| `aws_region`    | Amazon region to use         | us-east-1               |
+| `account_alias` | Prefix for backend resources | moduscreate-devops-demo |

terraform/bootstrap/README.md

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+terraform {
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 4.16"
+    }
+  }
+
+  required_version = "~> 1.2.0"
+}
+
+provider "aws" {
+  region = var.aws_region
+}
+
+module "bootstrap" {
+  source              = "trussworks/bootstrap/aws"
+
+  region              = var.aws_region
+  account_alias       = var.account_alias
+  dynamodb_table_name = "${var.account_alias}-state-lock"
+}
+
+data "aws_caller_identity" "current" {}
+
+output "account_id" {
+  value = "${data.aws_caller_identity.current.account_id}"
+}
+
+output "arn" {
+  value = "${data.aws_caller_identity.current.arn}"
+}
+
+output "user_id" {
+  value = "${data.aws_caller_identity.current.user_id}"
+}
+
+output "backend_details" {
+  description = "Details of the S3 bucket and DynamoDB tables created for backend"
+  value       = module.bootstrap
+}

terraform/bootstrap/main.tf

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+variable "aws_region" {
+  description = "Amazon Region to use"
+  default     = "us-east-1"
+}
+
+variable "account_alias" {
+  description = "Prefix for backend resources"
+  default     = "moduscreate-devops-demo"
+}