Make http_version configurable (#23)

Allow enabling HTTP/3.

Author: legoscia

README.md

@@ -116,6 +116,8 @@ See the [Terraform Modules documentation](https://www.terraform.io/docs/modules/
 * `price_class`: (Optional) The price class that corresponds with the maximum price that you want to pay for CloudFront service.
   Read [pricing page](https://aws.amazon.com/cloudfront/pricing/) for more details.
   Options: `PriceClass_100` | `PriceClass_200` | `PriceClass_All`. Default value = `PriceClass_200`
+* `http_version`: (Optional) Maximum HTTP version to support on the distribution.
+  Allowed values are `http1.1`, `http2`, `http2and3` and `http3`. The default is `http2`.
 * `ipv6`:  (Optional) Enable IPv6 support on CloudFront distribution. Default value = `false`
 * `wait-for-deployment`: (Optional) If enabled, the resource will wait for the distribution status to change from `InProgress` to `Deployed`. Setting this to `false` will skip the process. Default: `true`.
 * `minimum_client_tls_protocol_version`: (Optional) Set the minimum protocol version of the CloudFront certificate.

site-main/main.tf

@@ -125,7 +125,7 @@ resource "aws_cloudfront_distribution" "website_cdn" {
   enabled         = true
   is_ipv6_enabled = var.ipv6
   price_class     = var.price_class
-  http_version    = "http2"
+  http_version    = var.http_version
 
   wait_for_deployment = var.wait-for-deployment
 

site-main/variables.tf

@@ -88,6 +88,11 @@ variable "price_class" {
   default     = "PriceClass_200"
 }
 
+variable "http_version" {
+  type    = string
+  default = "http2"
+}
+
 variable "default_cache_behavior_lambda_function_associations" {
   description = "Optional Lambda@Edge function associations for the Default Cache Behavior (S3 bucket)"
   default = []

site-redirect/main.tf

@@ -88,7 +88,7 @@ resource "aws_cloudfront_distribution" "website_cdn" {
   enabled         = true
   is_ipv6_enabled = var.ipv6
   price_class     = var.price_class
-  http_version    = "http2"
+  http_version    = var.http_version
 
   origin {
     origin_id   = "origin-bucket-${aws_s3_bucket.website_bucket.id}"

site-redirect/variables.tf

@@ -36,6 +36,11 @@ variable "price_class" {
   default     = "PriceClass_200"
 }
 
+variable "http_version" {
+  type    = string
+  default = "http2"
+}
+
 variable "ipv6" {
   type        = bool
   description = "Enable IPv6 on CloudFront distribution"