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201 changes: 201 additions & 0 deletions LICENSE
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83 changes: 82 additions & 1 deletion README.md
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# tf_aws_cloudfront
Terraform module which creates AWS Cloudfront resources
A Terraform module containing typical AWS CloudFront distribution.

## Assumptions
* HTTPS traffic (so CF will offload HTTPS to HTTP)
* You've uploaded an SSL certificate to AWS/IAM
* Logging is created by default to separate S3 bucket

## Input Variables
* `name` - [mandatory] name you will see in i.e. in tags.
* `certificate_arn` - [mandatory] Existing certificate arn.
* `domains` - list of CNAME's to be associated with the CF (can be empty).
* `bucket_name` - S3 bucket name to be source for data served by CF.
* `compress` - Whether you want CloudFront to automatically compress content for web requests that include Accept-Encoding: gzip in the request header.
* `ipv6_enabled` - Whether the IPv6 is enabled for the distribution.
* `comment` - Comment used in both `aws_cloudfront_origin_access_identity` and `aws_cloudfront_distribution`.
* `log_include_cookies` - Specifies whether you want CloudFront to include cookies in access logs.
* `log_bucket` - Name of the bucket to place CF access logs.
* `log_prefix` - An optional string that you want CloudFront to prefix to the access log filenames for this distribution, for example, `cf_logs/.`.
* `price_class` - The price class for this distribution. One of PriceClass_All, PriceClass_200, PriceClass_100 (default).
* `viewer_protocol_policy` - Use this element to specify the protocol that users can use to access the files in the origin specified by TargetOriginId when a request matches the path pattern in PathPattern. One of allow-all, https-only, or redirect-to-https (default).
* `allowed_methods` - Controls which HTTP methods CloudFront processes and forwards to your Amazon S3 bucket or your custom origin.
* `cached_methods` - Controls whether CloudFront caches the response to requests using the specified HTTP methods.
* `min_ttl` - The minimum amount of time that you want objects to stay in CloudFront caches before CloudFront queries your origin to see whether the object has been updated.
* `max_ttl` - The maximum amount of time (in seconds) that an object is in a CloudFront cache before CloudFront forwards another request to your origin to determine whether the object has been updated. Only effective in the presence of Cache-Control max-age, Cache-Control s-maxage, and Expires headers.
* `default_ttl` - The default amount of time (in seconds) that an object is in a CloudFront cache before CloudFront forwards another request in the absence of an Cache-Control max-age or Expires header.
* `tags` - A mapping of tags to assign to the resource. By default `Name` is set.

## Outputs
* cf_id - The identifier for the distribution. For example: EDFDVBD632BHDS5.
* cf_arn - The ARN (Amazon Resource Name) for the distribution. For example: arn:aws:cloudfront::123456789012:distribution/EDFDVBD632BHDS5, where 123456789012 is your AWS account ID.
* cf_status - The current status of the distribution. Deployed if the distribution's information is fully propagated throughout the Amazon CloudFront system.
* active_trusted_signers - The key pair IDs that CloudFront is aware of for each trusted signer, if the distribution is set up to serve private content with signed URLs.
* cf_domain_name - The domain name corresponding to the distribution. For example: d604721fxaaqy9.cloudfront.net.
* cf_etag - The current version of the distribution's information. For example: E2QWRUHAPOMQZL.
* cf_hosted_zone_id - The CloudFront Route 53 zone ID that can be used to route an Alias Resource Record Set to. This attribute is simply an alias for the zone ID Z2FDTNDATAQYW2.
* s3_bucket_id - S3 bucket id
* s3_bucket_arn - S3 bucket arn

## Usage example:
```
module "cf_distro" {
source = "github.com/terraform-community-modules/tf_aws_cf"
name = "tf-${terraform.env}-my-cf"
domains = ["whatever-${terraform.env}.${var.domain}"]
certificate_arn = "arn:aws:acm:us-east-1:123456789123:certificate/11111111-2222-3333-4444-555555555555"
bucket_name = "tf-${terraform.env}-my-cf-bucket"
comment = "Managed by Terraform"
log_include_cookies = "false"
log_bucket = "tf-${terraform.env}-log-bucket-for-my-cf"
allowed_methods = ["GET", "HEAD"]
tags = {
"Terraform" = "true"
"Environment" = "${terraform.env}"
}
}
```

## Contributing
Report issues/questions/feature requests on in the [Issues](https://github.com/terraform-community-modules/tf_aws_cf/issues) section.

Pull requests are welcome! Ideally create a feature branch and issue for every
individual change you make. These are the steps:

1. Fork the repo.
2. Create your feature branch from master (`git checkout -b my-new-feature`).
4. Commit your awesome changes (`git commit -am 'Added some feature'`).
5. Push to the branch (`git push origin my-new-feature`).
6. Create a new Pull Request and tell us about your changes.

## Change log
For description of changes please refer to commit descriptions

## Authors
Created and maintained by [Marek Kwasecki](https://github.com/kwach) - marek.kwasecki@radpoint.pl.

## License
Apache v2.0 Licensed. See [LICENSE](LICENSE) for full details.

106 changes: 106 additions & 0 deletions main.tf
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# --- S3 bucket ---

data "aws_iam_policy_document" "s3_policy_cf_bucket" {
statement {
actions = ["s3:GetObject"]
resources = ["arn:aws:s3:::${var.bucket_name}/*"]

principals {
type = "AWS"
identifiers = ["${aws_cloudfront_origin_access_identity.origin_access_identity.iam_arn}"]
}
}

statement {
actions = ["s3:ListBucket"]
resources = ["arn:aws:s3:::${var.bucket_name}"]

principals {
type = "AWS"
identifiers = ["${aws_cloudfront_origin_access_identity.origin_access_identity.iam_arn}"]
}
}
}

resource "aws_s3_bucket" "bucket" {
bucket = "${var.bucket_name}"
acl = "private"
policy = "${data.aws_iam_policy_document.s3_policy_cf_bucket.json}"

tags = "${merge("${var.tags}", map("Name", format("%s-bucket", var.name)))}"
}

# --- CloudFront ---

resource "aws_cloudfront_origin_access_identity" "origin_access_identity" {
comment = "access-identity-${var.name}"
}

resource "aws_s3_bucket" "log_bucket" {
bucket = "${var.log_bucket}"
#policy = "${data.aws_iam_policy_document.s3_policy_cf_logs.json}"
force_destroy = true

tags = "${merge(var.tags, map("Name", format("%s", var.log_bucket)))}"
}

resource "aws_cloudfront_distribution" "cf" {
enabled = "true"
is_ipv6_enabled = "${var.ipv6_enabled}"
comment = "${var.comment}"
default_root_object = "index.html"
price_class = "${var.price_class}"

logging_config = {
include_cookies = "${var.log_include_cookies}"
bucket = "${var.log_bucket}.s3.amazonaws.com"
prefix = "${var.log_prefix}"
}

aliases = ["${var.domains}"]

origin {
domain_name = "${aws_s3_bucket.bucket.bucket_domain_name}"
origin_id = "${var.bucket_name}"

s3_origin_config {
origin_access_identity = "${aws_cloudfront_origin_access_identity.origin_access_identity.cloudfront_access_identity_path}"
}
}

viewer_certificate {
acm_certificate_arn = "${var.certificate_arn}"
ssl_support_method = "sni-only"
minimum_protocol_version = "TLSv1"
}

default_cache_behavior {
allowed_methods = "${var.allowed_methods}"
cached_methods = "${var.cached_methods}"
target_origin_id = "${var.bucket_name}"
compress = "${var.compress}"

forwarded_values {
query_string = false

cookies {
forward = "none"
}
}

viewer_protocol_policy = "${var.viewer_protocol_policy}"
min_ttl = "${var.min_ttl}"
default_ttl = "${var.default_ttl}"
max_ttl = "${var.max_ttl}"
}

"restrictions" {
"geo_restriction" {
restriction_type = "none"
}
}

tags = "${merge("${var.tags}", map("Name", format("%s", var.name)))}"

depends_on = ["aws_s3_bucket.log_bucket"]
}
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