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feat(terraform): add CDN infrastructure (part 1) (#80)
* feat(terraform): add CDN infrastructure * feat(terraform): add `assets_version` * fix(terraform): add `assets_version` to service module call * fix(terraform): tweak comment * fix(terraform): fixes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,205 @@ | ||
| provider "aws" { | ||
| alias = "acm" | ||
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| # CloudFront expects ACM resources in us-east-1 region only | ||
| region = "us-east-1" | ||
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| # Make it faster by skipping various bits not important. | ||
| skip_metadata_api_check = true | ||
| skip_region_validation = true | ||
| skip_credentials_validation = true | ||
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| # skip_requesting_account_id should be disabled to generate valid ARN in apigatewayv2_api_execution_arn | ||
| skip_requesting_account_id = false | ||
| } | ||
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| data "aws_route53_zone" "this" { | ||
| name = var.domain_name | ||
| } | ||
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| locals { | ||
| domain_name = trimsuffix(data.aws_route53_zone.this.name, ".") | ||
| subdomain = "cdn" | ||
| } | ||
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| module "acm" { | ||
| source = "terraform-aws-modules/acm/aws" | ||
| version = "~> 4.0" | ||
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| domain_name = "${local.subdomain}.${local.domain_name}" | ||
| zone_id = data.aws_route53_zone.this.id | ||
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| create_route53_records = false | ||
| validation_record_fqdns = module.route53_records.validation_route53_record_fqdns | ||
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| providers = { | ||
| aws = aws.acm | ||
| } | ||
| } | ||
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| module "route53_records" { | ||
| source = "terraform-aws-modules/acm/aws" | ||
| version = "~> 4.0" | ||
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| create_certificate = false | ||
| create_route53_records_only = true | ||
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| validation_method = "DNS" | ||
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| distinct_domain_names = module.acm.distinct_domain_names | ||
| zone_id = data.aws_route53_zone.this.id | ||
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| acm_certificate_domain_validation_options = module.acm.acm_certificate_domain_validation_options | ||
| } | ||
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| module "cloudfront" { | ||
| source = "terraform-aws-modules/cloudfront/aws" | ||
| version = "~> 3.4" | ||
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| aliases = ["${local.subdomain}.${local.domain_name}"] | ||
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| http_version = "http2and3" | ||
| is_ipv6_enabled = true | ||
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| # `PriceClass_100` is most cost efficient for VOL and covers the main region of the VOL user-base (UK). | ||
| price_class = "PriceClass_100" | ||
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| wait_for_deployment = false | ||
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| # When you enable additional metrics for a distribution, CloudFront sends up to 8 metrics to CloudWatch in the US East (N. Virginia) Region. | ||
| # This rate is charged only once per month, per metric (up to 8 metrics per distribution). | ||
| create_monitoring_subscription = true | ||
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| create_origin_access_control = true | ||
| origin_access_control = { | ||
| s3_oac = { | ||
| description = "CloudFront access to S3" | ||
| origin_type = "s3" | ||
| signing_behavior = "always" | ||
| signing_protocol = "sigv4" | ||
| } | ||
| } | ||
|
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| logging_config = { | ||
| bucket = module.log_bucket.s3_bucket_bucket_domain_name | ||
| prefix = "cloudfront" | ||
| } | ||
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| origin = { | ||
| s3_oac = { | ||
| domain_name = module.s3_one.s3_bucket_bucket_regional_domain_name | ||
| origin_access_control = "s3_oac" | ||
| origin_path = "/${trimprefix(var.assets_version, "/")}" | ||
| } | ||
| } | ||
|
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| default_cache_behavior = { | ||
| target_origin_id = "s3_oac" | ||
| viewer_protocol_policy = "allow-all" | ||
| allowed_methods = ["GET", "HEAD", "OPTIONS"] | ||
| cached_methods = ["GET", "HEAD"] | ||
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| use_forwarded_values = false | ||
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| cache_policy_name = "Managed-CachingOptimized" | ||
| origin_request_policy_name = "Managed-UserAgentRefererHeaders" | ||
| response_headers_policy_name = "Managed-SimpleCORS" | ||
| } | ||
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| ordered_cache_behavior = [ | ||
| { | ||
| path_pattern = "/static/*" | ||
| target_origin_id = "s3_oac" | ||
| viewer_protocol_policy = "redirect-to-https" | ||
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| allowed_methods = ["GET", "HEAD", "OPTIONS"] | ||
| cached_methods = ["GET", "HEAD"] | ||
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| use_forwarded_values = false | ||
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| cache_policy_name = "Managed-CachingOptimized" | ||
| origin_request_policy_name = "Managed-UserAgentRefererHeaders" | ||
| response_headers_policy_name = "Managed-SecurityHeadersPolicy" | ||
| }, | ||
| ] | ||
|
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| viewer_certificate = { | ||
| acm_certificate_arn = module.acm.acm_certificate_arn | ||
| ssl_support_method = "sni-only" | ||
| } | ||
| } | ||
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| data "aws_canonical_user_id" "current" {} | ||
| data "aws_cloudfront_log_delivery_canonical_user_id" "cloudfront" {} | ||
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| module "s3_one" { | ||
| source = "terraform-aws-modules/s3-bucket/aws" | ||
| version = "~> 4.0" | ||
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| bucket = "vol-app-${var.environment}-assets" | ||
| force_destroy = true | ||
| } | ||
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| module "log_bucket" { | ||
| source = "terraform-aws-modules/s3-bucket/aws" | ||
| version = "~> 4.0" | ||
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| bucket = "vol-app-${var.environment}-assets-logs" | ||
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| control_object_ownership = true | ||
| object_ownership = "ObjectWriter" | ||
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| grant = [{ | ||
| type = "CanonicalUser" | ||
| permission = "FULL_CONTROL" | ||
| id = data.aws_canonical_user_id.current.id | ||
| }, { | ||
| # https://github.com/terraform-providers/terraform-provider-aws/issues/12512 | ||
| # https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/AccessLogs.html | ||
| type = "CanonicalUser" | ||
| permission = "FULL_CONTROL" | ||
| id = data.aws_cloudfront_log_delivery_canonical_user_id.cloudfront.id | ||
| }] | ||
| force_destroy = true | ||
| } | ||
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| module "records" { | ||
| source = "terraform-aws-modules/route53/aws//modules/records" | ||
| version = "~> 2.0" | ||
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| zone_id = data.aws_route53_zone.this.zone_id | ||
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| records = [ | ||
| { | ||
| name = local.subdomain | ||
| type = "A" | ||
| alias = { | ||
| name = module.cloudfront.cloudfront_distribution_domain_name | ||
| zone_id = module.cloudfront.cloudfront_distribution_hosted_zone_id | ||
| } | ||
| }, | ||
| ] | ||
| } | ||
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| data "aws_iam_policy_document" "s3_policy" { | ||
| statement { | ||
| actions = ["s3:GetObject"] | ||
| resources = ["${module.s3_one.s3_bucket_arn}/static/*"] | ||
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| principals { | ||
| type = "Service" | ||
| identifiers = ["cloudfront.amazonaws.com"] | ||
| } | ||
|
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| condition { | ||
| test = "StringEquals" | ||
| variable = "aws:SourceArn" | ||
| values = [module.cloudfront.cloudfront_distribution_arn] | ||
| } | ||
| } | ||
| } | ||
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| resource "aws_s3_bucket_policy" "bucket_policy" { | ||
| bucket = module.s3_one.s3_bucket_id | ||
| policy = data.aws_iam_policy_document.s3_policy.json | ||
| } |
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