adding sns-email-topic module

monitoring/sns-email-topic/README.md

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+# SNS Email Topic
+
+Create an SNS topic that uses Email based notifications.
+
+## Usage
+
+```
+module "sns_email_topic" {
+  source = "github.com/lalanza808/tf-modules.git/monitoring/sns-email-topic"
+  sns_emails = ["email1@asd.com", "email2@asd.com"]
+}
+```
+
+## Inputs
+
+You don't need to provide any inputs, but you can override all of the defaults. See the full list of inputs here: [variables.tf](./variables.tf)
+
+## Outputs
+
+[output.tf](./output.tf)

monitoring/sns-email-topic/files/email-endpoint-list.json.tpl

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+{
+ "Endpoint" : "${email_address}",
+ "Protocol" : "email"
+}

monitoring/sns-email-topic/files/email-sns-stack.json.tpl

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+{
+  "AWSTemplateFormatVersion": "2010-09-09",
+  "Resources" : {
+    "EmailSNSTopic": {
+      "Type" : "AWS::SNS::Topic",
+      "Properties" : {
+        "DisplayName" : "${display_name}",
+        "Subscription": [
+          ${endpoints}
+        ]
+      }
+    }
+  },
+
+  "Outputs" : {
+    "TopicARN" : {
+      "Description" : "Email SNS Topic ARN",
+      "Value" : { "Ref" : "EmailSNSTopic" }
+    }
+  }
+}

monitoring/sns-email-topic/main.tf

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+data "template_file" "endpoints" {
+  template = "${file("${path.module}/files/email-endpoint-list.json.tpl")}"
+  count    = "${length(var.sns_emails)}"
+
+  vars = {
+    email_address = "${element(var.sns_emails, count.index)}"
+  }
+}
+
+data "template_file" "sns_stack" {
+  template = "${file("${path.module}/files/email-sns-stack.json.tpl")}"
+
+  vars = {
+    endpoints    = "${join(",", data.template_file.endpoints.*.rendered)}"
+    display_name = "${var.prefix}-sns-email"
+  }
+}
+
+resource "aws_cloudformation_stack" "sns_stack" {
+  name          = "${var.prefix}-sns-email"
+  template_body = "${data.template_file.sns_stack.rendered}"
+  tags          = var.tags
+}

monitoring/sns-email-topic/outputs.tf

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+output "topic_arn" {
+  value = aws_cloudformation_stack.sns_stack.outputs["TopicARN"]
+}

monitoring/sns-email-topic/variables.tf

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+variable "sns_emails" {
+  type = list
+  default = []
+}
+variable "tags" {
+  default     = {}
+  type        = map
+  description = "Optional tag mapping to apply to the infrastructure"
+}
+variable "prefix" {
+  default     = "monitoring"
+  description = "String to prefix to all resources"
+}