Added 'custom_error_response' input param support for cdn distribution (#28)

* Update variables.tf

Added custom_error_reponse variable to support CDN custom error.

* Update main.tf

Added  custom_error_response param.

* Update README.md

Added custom_error_response input param.

* Formatted main.

* Updated terraform.md and removed manual entry from README.

* Update terraform.md

Removed Optional from attribute.

Author: garzparz

README.md

@@ -10,7 +10,7 @@ Terraform module to easily provision an AWS CloudFront CDN with an S3 or custom
 
 ---
 
-This project is part of our comprehensive ["SweetOps"](https://docs.cloudposse.com) approach towards DevOps. 
+This project is part of our comprehensive ["SweetOps"](https://docs.cloudposse.com) approach towards DevOps.
 
 
 It's 100% Open Source and licensed under the [APACHE2](LICENSE).
@@ -163,9 +163,9 @@ File a GitHub [issue](https://github.com/cloudposse/terraform-aws-cloudfront-s3-
 
 ## Commercial Support
 
-Work directly with our team of DevOps experts via email, slack, and video conferencing. 
+Work directly with our team of DevOps experts via email, slack, and video conferencing.
 
-We provide [*commercial support*][commercial_support] for all of our [Open Source][github] projects. As a *Dedicated Support* customer, you have access to our team of subject matter experts at a fraction of the cost of a full-time engineer. 
+We provide [*commercial support*][commercial_support] for all of our [Open Source][github] projects. As a *Dedicated Support* customer, you have access to our team of subject matter experts at a fraction of the cost of a full-time engineer.
 
 [![E-Mail](https://img.shields.io/badge/[email protected])](mailto:[email protected])
 
@@ -175,7 +175,7 @@ We provide [*commercial support*][commercial_support] for all of our [Open Sourc
 - **Bug Fixes.** We'll rapidly work to fix any bugs in our projects.
 - **Build New Terraform Modules.** We'll develop original modules to provision infrastructure.
 - **Cloud Architecture.** We'll assist with your cloud strategy and design.
-- **Implementation.** We'll provide hands-on support to implement our reference architectures. 
+- **Implementation.** We'll provide hands-on support to implement our reference architectures.
 
 
 ## Community Forum
@@ -209,9 +209,9 @@ Copyright © 2017-2018 [Cloud Posse, LLC](https://cloudposse.com)
 
 
 
-## License 
+## License
 
-[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) 
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
 See [LICENSE](LICENSE) for full details.
 
@@ -252,7 +252,7 @@ This project is maintained and funded by [Cloud Posse, LLC][website]. Like it? P
 
 We're a [DevOps Professional Services][hire] company based in Los Angeles, CA. We love [Open Source Software](https://github.com/cloudposse/)!
 
-We offer paid support on all of our projects.  
+We offer paid support on all of our projects.
 
 Check out [our other projects][github], [apply for a job][jobs], or [hire us][hire] to help with your cloud strategy and implementation.
 

docs/terraform.md

@@ -16,6 +16,7 @@
 | cors_allowed_origins | List of allowed origins (e.g. example.com, test.com) for S3 bucket | list | `<list>` | no |
 | cors_expose_headers | List of expose header in the response for S3 bucket | list | `<list>` | no |
 | cors_max_age_seconds | Time in seconds that browser can cache the response for S3 bucket | string | `3600` | no |
+| custom_error_response | List of one or more custom error response element maps | list | `<list>` | no |
 | default_root_object | Object that CloudFront return when requests the root URL | string | `index.html` | no |
 | default_ttl | Default amount of time (in seconds) that an object is in a CloudFront cache | string | `60` | no |
 | delimiter | Delimiter to be used between `name`, `namespace`, `stage`, etc. | string | `-` | no |

main.tf

@@ -164,6 +164,8 @@ resource "aws_cloudfront_distribution" "default" {
     }
   }
 
+  custom_error_response = ["${var.custom_error_response}"]
+
   tags = "${module.distribution_label.tags}"
 }
 

variables.tf

@@ -248,3 +248,12 @@ DOC
 
   default = "aws-cli"
 }
+
+variable "custom_error_response" {
+  # http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/custom-error-pages.html#custom-error-pages-procedure
+  # https://www.terraform.io/docs/providers/aws/r/cloudfront_distribution.html#custom-error-response-arguments
+  description = "(Optional) - List of one or more custom error response element maps"
+
+  type    = "list"
+  default = []
+}