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terraform {
required_version = ">= 0.12"
backend "s3" {
region = "ca-central-1"
bucket = "rekahsoft-terraform"
key = "blog-rekahsoft-ca/blog-rekahsoft-ca.tfstate"
dynamodb_table = "rekahsoft-terraform"
}
}
provider "aws" {
region = var.region
version = "~> 2.15"
assume_role {
role_arn = var.workspace_iam_roles[terraform.workspace]
}
}
provider "aws" {
alias = "us_east_1"
region = "us-east-1"
version = "~> 2.1"
assume_role {
role_arn = var.workspace_iam_roles[terraform.workspace]
}
}
provider "null" {
version = "~> 2.1"
}
provider "random" {
version = "~> 2.1"
}
provider "template" {
version = "~> 2.1"
}
#
# Local values to be re-used throughout this template
locals {
common_tags = {
"Project" = var.project
"Environment" = terraform.workspace
}
cdn_origin_id = "${terraform.workspace}-origin-cdn"
www = var.enable_naked_domain ? "" : "www."
subdomain = var.subdomain == "" ? "" : "${var.subdomain}."
naked_domain = "${local.subdomain}${var.dns_apex}"
domain = "${local.www}${local.naked_domain}"
project_env = "${var.project}-${terraform.workspace}"
}
#
# Data Sources
data "template_file" "s3_origin_policy" {
template = file("templates/s3_origin_policy.json")
vars = {
bucket_arn = aws_s3_bucket.static.arn
user_arn = aws_iam_user.app_deploy.arn
cloudfront_arn = aws_cloudfront_origin_access_identity.origin_access_identity.iam_arn
}
}
data "aws_route53_zone" "external" {
name = "${var.dns_apex}."
}
#
# Resources
resource "aws_acm_certificate" "cert" {
domain_name = local.domain
subject_alternative_names = compact([var.enable_naked_domain ? "" : local.naked_domain])
validation_method = "DNS"
tags = local.common_tags
provider = aws.us_east_1
}
resource "aws_route53_record" "cert_validation" {
count = 1 + (var.enable_naked_domain ? 0 : 1)
zone_id = data.aws_route53_zone.external.id
name = aws_acm_certificate.cert.domain_validation_options[count.index]["resource_record_name"]
type = aws_acm_certificate.cert.domain_validation_options[count.index]["resource_record_type"]
ttl = 60
# TF-UPGRADE-TODO: In Terraform v0.10 and earlier, it was sometimes necessary to
# force an interpolation expression to be interpreted as a list by wrapping it
# in an extra set of list brackets. That form was supported for compatibilty in
# v0.11, but is no longer supported in Terraform v0.12.
#
# If the expression in the following list itself returns a list, remove the
# brackets to avoid interpretation as a list of lists. If the expression
# returns a single list item then leave it as-is and remove this TODO comment.
records = [aws_acm_certificate.cert.domain_validation_options[count.index]["resource_record_value"]]
}
resource "aws_acm_certificate_validation" "cert" {
certificate_arn = aws_acm_certificate.cert.arn
validation_record_fqdns = aws_route53_record.cert_validation.*.fqdn
provider = aws.us_east_1
}
resource "aws_s3_bucket" "static" {
bucket_prefix = local.project_env
acl = "private"
website {
index_document = "index.html"
error_document = "error.html"
}
tags = local.common_tags
}
resource "aws_s3_bucket" "static_redirect" {
count = var.enable_naked_domain ? 0 : 1
bucket_prefix = local.project_env
acl = "private"
website {
redirect_all_requests_to = "https://${local.domain}"
}
tags = local.common_tags
}
resource "aws_s3_bucket" "static_logs" {
bucket_prefix = local.project_env
acl = "private"
}
resource "random_string" "app_deploy_username" {
length = 16
special = true
override_special = "_+=,.@-"
}
resource "aws_iam_user" "app_deploy" {
name = random_string.app_deploy_username.result
}
resource "aws_iam_access_key" "app_deploy" {
user = aws_iam_user.app_deploy.name
# pgp_key = "keybase:some_person_that_exists"
}
resource "aws_route53_record" "static" {
zone_id = data.aws_route53_zone.external.zone_id
name = "${local.domain}."
type = "A"
alias {
name = aws_cloudfront_distribution.cdn.domain_name
zone_id = aws_cloudfront_distribution.cdn.hosted_zone_id
evaluate_target_health = true
}
}
resource "aws_route53_record" "static_ipv6" {
zone_id = data.aws_route53_zone.external.zone_id
name = "${local.domain}."
type = "AAAA"
alias {
name = aws_cloudfront_distribution.cdn.domain_name
zone_id = aws_cloudfront_distribution.cdn.hosted_zone_id
evaluate_target_health = true
}
}
resource "aws_route53_record" "static_redirect" {
count = var.enable_naked_domain ? 0 : 1
zone_id = data.aws_route53_zone.external.zone_id
name = "${local.naked_domain}."
type = "A"
alias {
name = aws_cloudfront_distribution.cdn_redirect[0].domain_name
zone_id = aws_cloudfront_distribution.cdn_redirect[0].hosted_zone_id
evaluate_target_health = true
}
}
resource "aws_route53_record" "static_redirect_ipv6" {
count = var.enable_naked_domain ? 0 : 1
zone_id = data.aws_route53_zone.external.zone_id
name = "${local.naked_domain}."
type = "AAAA"
alias {
name = aws_cloudfront_distribution.cdn_redirect[0].domain_name
zone_id = aws_cloudfront_distribution.cdn_redirect[0].hosted_zone_id
evaluate_target_health = true
}
}
resource "aws_s3_bucket_policy" "static_policy" {
bucket = aws_s3_bucket.static.id
policy = data.template_file.s3_origin_policy.rendered
}
resource "aws_cloudfront_origin_access_identity" "origin_access_identity" {
comment = "Origin access policy for ${local.project_env}"
}
resource "aws_cloudfront_distribution" "cdn" {
# Static file origin
origin {
domain_name = aws_s3_bucket.static.bucket_regional_domain_name
origin_id = local.cdn_origin_id
s3_origin_config {
origin_access_identity = aws_cloudfront_origin_access_identity.origin_access_identity.cloudfront_access_identity_path
}
}
enabled = true
is_ipv6_enabled = true
comment = "CDN for ${var.project} (environment ${terraform.workspace})"
default_root_object = "index.html"
# Return index.html for any route that is not found
custom_error_response {
error_caching_min_ttl = 0
error_code = 403
response_code = 200
response_page_path = "/index.html"
}
logging_config {
include_cookies = false
bucket = aws_s3_bucket.static_logs.bucket_domain_name
}
# TF-UPGRADE-TODO: In Terraform v0.10 and earlier, it was sometimes necessary to
# force an interpolation expression to be interpreted as a list by wrapping it
# in an extra set of list brackets. That form was supported for compatibilty in
# v0.11, but is no longer supported in Terraform v0.12.
#
# If the expression in the following list itself returns a list, remove the
# brackets to avoid interpretation as a list of lists. If the expression
# returns a single list item then leave it as-is and remove this TODO comment.
aliases = [local.domain]
default_cache_behavior {
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD", "OPTIONS"]
target_origin_id = local.cdn_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
viewer_protocol_policy = "redirect-to-https"
}
# Cache behavior with precedence 0
ordered_cache_behavior {
path_pattern = "index.html"
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD", "OPTIONS"]
target_origin_id = local.cdn_origin_id
forwarded_values {
query_string = false
headers = ["Origin"]
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 0
max_ttl = 0
compress = true
viewer_protocol_policy = "redirect-to-https"
}
price_class = "PriceClass_100"
restrictions {
geo_restriction {
restriction_type = "none"
}
}
tags = local.common_tags
viewer_certificate {
acm_certificate_arn = aws_acm_certificate_validation.cert.certificate_arn
ssl_support_method = "sni-only"
minimum_protocol_version = "TLSv1.1_2016"
}
}
resource "aws_cloudfront_distribution" "cdn_redirect" {
count = var.enable_naked_domain ? 0 : 1
# Static file origin
origin {
domain_name = "${aws_s3_bucket.static_redirect[0].id}.${aws_s3_bucket.static_redirect[0].website_domain}"
origin_id = local.cdn_origin_id
custom_origin_config {
http_port = 80
https_port = 443
origin_ssl_protocols = ["TLSv1.1", "TLSv1.2"]
origin_protocol_policy = "http-only"
}
}
enabled = true
is_ipv6_enabled = true
comment = "CDN redirect for ${var.project} (environment ${terraform.workspace})"
logging_config {
include_cookies = false
bucket = aws_s3_bucket.static_logs.bucket_domain_name
}
# TF-UPGRADE-TODO: In Terraform v0.10 and earlier, it was sometimes necessary to
# force an interpolation expression to be interpreted as a list by wrapping it
# in an extra set of list brackets. That form was supported for compatibilty in
# v0.11, but is no longer supported in Terraform v0.12.
#
# If the expression in the following list itself returns a list, remove the
# brackets to avoid interpretation as a list of lists. If the expression
# returns a single list item then leave it as-is and remove this TODO comment.
aliases = [local.naked_domain]
default_cache_behavior {
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD", "OPTIONS"]
target_origin_id = local.cdn_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
viewer_protocol_policy = "redirect-to-https"
}
price_class = "PriceClass_100"
restrictions {
geo_restriction {
restriction_type = "none"
}
}
tags = local.common_tags
viewer_certificate {
acm_certificate_arn = aws_acm_certificate_validation.cert.certificate_arn
ssl_support_method = "sni-only"
minimum_protocol_version = "TLSv1.1_2016"
}
}
resource "null_resource" "deploy_app" {
triggers = {
always = uuid()
}
provisioner "local-exec" {
interpreter = ["bash", "-c"]
command = <<SCRIPT
: Create temporary aws config and credentials files
export AWS_CONFIG_FILE=$(mktemp);
export AWS_SHARED_CREDENTIALS_FILE=$(mktemp);
: Add default AWS account profile;
aws configure --profile ${aws_iam_user.app_deploy.name} set aws_access_key_id ${aws_iam_access_key.app_deploy.id};
aws configure --profile ${aws_iam_user.app_deploy.name} set aws_secret_access_key ${aws_iam_access_key.app_deploy.secret};
aws configure --profile ${aws_iam_user.app_deploy.name} set region ${var.region};
: Sync latest app build to s3 bucket;
aws --profile ${aws_iam_user.app_deploy.name} s3 sync --delete ../_site s3://${aws_s3_bucket.static.id}/;
: Cleanup temporary aws config and credentials files
rm $${AWS_CONFIG_FILE} $${AWS_SHARED_CREDENTIALS_FILE};
SCRIPT
}
}