upload cloudwatch sns module

Cloudwatch and SNS will be used to set a monitoring and notification system in place for idle resources

modules/services/cloud-watch/main.tf

@@ -0,0 +1,51 @@
+variable "sms_number" {
+  description = "The SMS number to send CloudWatch Notifications To"
+}
+variable "autoscaling_group" {
+  description = "The autoscaling group to monitor"
+}
+
+resource "aws_sns_topic" "send_text" {
+  name = "sendText"
+}
+
+resource "aws_sns_topic_subscription" "text_send_text_target" {
+  topic_arn = "${aws_sns_topic.send_text.arn}"
+  protocol  = "sms"
+  endpoint = "${var.sms_number}"
+}
+
+resource "aws_cloudwatch_metric_alarm" "alarm_minutes" {
+  alarm_name          = "terraform-idle_cpu_5_mins"
+  comparison_operator = "LessThanOrEqualToThreshold"
+  evaluation_periods  = "5"
+  metric_name         = "CPUUtilization"
+  namespace           = "AWS/EC2"
+  period              = "60"
+  statistic           = "Average"
+  threshold           = "2"
+
+dimensions {
+    AutoScalingGroupName = "${var.autoscaling_group}"
+  }
+
+  alarm_description = "This metric monitors ec2 cpu utilization every minute for 5 minutes"
+  alarm_actions     = ["${aws_sns_topic.send_text.arn}"]
+}
+resource "aws_cloudwatch_metric_alarm" "alarm_hours" {
+  alarm_name          = "terraform-idle_cpu_5_hours"
+  comparison_operator = "LessThanOrEqualToThreshold"
+  evaluation_periods  = "5"
+  metric_name         = "CPUUtilization"
+  namespace           = "AWS/EC2"
+  period              = "3600"
+  statistic           = "Average"
+  threshold           = "2"
+
+dimensions {
+    AutoScalingGroupName = "${var.autoscaling_group}"
+  }
+
+  alarm_description = "This metric monitors ec2 cpu utilization every hour for 5 hours"
+  alarm_actions     = ["${aws_sns_topic.send_text.arn}"]
+}