README.md

terraform-aws-cloudfront-s3-website

Terraform module for creating an s3 static website with Cloudfront distribution

The following resources will be created

• S3 Bucket
• CloudFront distribution
• Route53 record
• Upload sample HTML file (optional)

Prerequisites (Optional in example2):

• Route 53 hosted zone for example.com
• ACM certificate for *.example.com in us-east-1 region

Example 1

provider "aws" {
  region = "us-east-1"
}

module "cloudfront_s3_website_with_domain" {
    source                 = "chgangaraju/cloudfront-s3-website/aws"
    version                = "1.2.6"
    hosted_zone            = "example.com" 
    domain_name            = "test.abc.example.com"
    acm_certificate_domain = "*.abc.example.com"
    upload_sample_file     = true
}

Example 2

module "cloudfront_s3_website_without_domain" {
    source                 = "chgangaraju/cloudfront-s3-website/aws"
    version                = "1.2.6"
    domain_name            = "test-application-1232" // Any random identifier for s3 bucket name
    use_default_domain     = true
    upload_sample_file     = true
}

Cloudfront TTL settings

• CloudFront caches the static content at default values. However, if you change it constantly without recreating the bucket, you may need to decrease the TTL values.
  • https://stackoverflow.com/questions/67845341/cloudfront-s3-etag-possible-for-cloudfront-to-send-updated-s3-object-before-t
  • https://stackoverflow.com/questions/12783009/does-amazon-s3-send-invalidation-signals-to-cloudfront
  • https://developers.google.com/speed/docs/insights/LeverageBrowserCaching

        # optional values
        cloudfront_min_ttl     = 10
        cloudfront_default_ttl = 1400
        cloudfront_max_ttl     = 86400