Merge pull request #18 from NHSDigital/CCM-5156-account-subdomain-creation

CCM-5156 create subdomains for each account

Author: RossBugginsNHS

infrastructure/terraform/.gitignore

@@ -3,6 +3,13 @@
 # Transient backends
 components/**/backend_tfscaffold.tf
 
+# Exclude all .tfvars files, which are likely to contain sensitive data, such as
+# password, private keys, and other secrets. These should not be part of version
+# control as they are data points which are potentially sensitive and subject
+# to change depending on the environment.
+*.tfvars
+*.tfvars.json
+
 # Compiled files
 **/*.tfstate
 **/*.tfplan

infrastructure/terraform/README

@@ -0,0 +1,3 @@
+This is an implementation of https://github.com/tfutils/tfscaffold for NHS Notify
+
+Update the `etc/global.tfvars` file according to your NHS Notify Domain, and follow https://github.com/tfutils/tfscaffold?tab=readme-ov-file#bootstrapping to get your tfstate s3 bucket set up

infrastructure/terraform/components/acct/.terraform-version

@@ -0,0 +1 @@
+latest:^1\.8\.

infrastructure/terraform/components/acct/README

@@ -0,0 +1,5 @@
+README for 'acct' component - Account-level resources
+
+This component is intended to be run to set up things (such as a DNS subdomain) at the account level, and this should be run for each account belonging to the Notify Domain - i.e. there should be a nonprod and prod environment .tfvars
+
+Copy the `env_eu-west-2_example.tfvars` file in the `etc` directory and adjust as needed for nonprod and prod for your NHS Notify Domain.

infrastructure/terraform/components/acct/locals_tfscaffold.tf

@@ -0,0 +1,45 @@
+locals {
+  terraform_state_bucket = format(
+    "%s-tfscaffold-%s-%s",
+    var.project,
+    var.aws_account_id,
+    var.region,
+  )
+
+  csi = replace(
+    format(
+      "%s-%s-%s",
+      var.project,
+      var.environment,
+      var.component,
+    ),
+    "_",
+    "",
+  )
+
+  # CSI for use in resources with a global namespace, i.e. S3 Buckets
+  csi_global = replace(
+    format(
+      "%s-%s-%s-%s-%s",
+      var.project,
+      var.aws_account_id,
+      var.region,
+      var.environment,
+      var.component,
+    ),
+    "_",
+    "",
+  )
+
+  default_tags = merge(
+    var.default_tags,
+    {
+      Project         = var.project
+      Environment     = var.environment
+      Component       = var.component
+      Group           = var.group
+      NHSNotifyDomain = var.nhs_notify_domain
+      Name            = local.csi
+    },
+  )
+}

infrastructure/terraform/components/acct/outputs.tf

@@ -0,0 +1,19 @@
+output "aws_account_id" {
+  value = var.aws_account_id
+}
+
+output "r53_delegation_set_id" {
+  value = aws_route53_delegation_set.main.id
+}
+
+output "r53_delegation_set_nameservers" {
+  value = aws_route53_delegation_set.main.name_servers
+}
+
+output "r53_subdomain_name" {
+  value = var.subdomain_name
+}
+
+output "r53_subdomain_id" {
+  value = one(aws_route53_zone.subdomain[*].id)
+}

infrastructure/terraform/components/acct/provider_aws.tf

@@ -0,0 +1,18 @@
+provider "aws" {
+  region = var.region
+
+  allowed_account_ids = [
+    var.aws_account_id,
+  ]
+
+  default_tags {
+    tags = {
+      Project         = var.project
+      Environment     = var.environment
+      Component       = var.component
+      Group           = var.group
+      NHSNotifyDomain = var.nhs_notify_domain
+      Name            = local.csi
+    }
+  }
+}

infrastructure/terraform/components/acct/route53_delegation_set_main.tf

@@ -0,0 +1,3 @@
+resource "aws_route53_delegation_set" "main" {
+  reference_name = "main"
+}

infrastructure/terraform/components/acct/route53_zone_subdomain.tf

@@ -0,0 +1,7 @@
+resource "aws_route53_zone" "subdomain" {
+  count = var.subdomain_name != "" ? 1 : 0
+
+  name = var.subdomain_name
+
+  delegation_set_id = aws_route53_delegation_set.main.id
+}

infrastructure/terraform/components/acct/variables.tf

@@ -0,0 +1,64 @@
+##
+# Basic Required Variables for tfscaffold Components
+##
+
+variable "project" {
+  type        = string
+  description = "The name of the tfscaffold project"
+}
+
+variable "environment" {
+  type        = string
+  description = "The name of the tfscaffold environment"
+}
+
+variable "aws_account_id" {
+  type        = string
+  description = "The AWS Account ID (numeric)"
+}
+
+variable "region" {
+  type        = string
+  description = "The AWS Region"
+}
+
+variable "group" {
+  type        = string
+  description = "The group variables are being inherited from (often synonmous with account short-name)"
+}
+
+##
+# tfscaffold variables specific to this component
+##
+
+# This is the only primary variable to have its value defined as
+# a default within its declaration in this file, because the variables
+# purpose is as an identifier unique to this component, rather
+# then to the environment from where all other variables come.
+variable "component" {
+  type        = string
+  description = "The variable encapsulating the name of this component"
+  default     = "acct"
+}
+
+variable "nhs_notify_domain" {
+  type        = string
+  description = "The name of the NHS Notify Domain that this is deploying to"
+}
+
+variable "default_tags" {
+  type        = map(string)
+  description = "A map of default tags to apply to all taggable resources within the component"
+  default     = {}
+}
+
+
+##
+# Variables specific to the "acct" component
+##
+
+variable "subdomain_name" {
+  type        = string
+  description = "The subdomain name to create a Route53 zone for"
+  default     = ""
+}