Change alarm_action_arn to list. Correct readme examples.

Author: dan-hill2802

README.md

@@ -2,9 +2,9 @@
 Terraform module that creates AWS CloudWatch metric filter and alarm
 
 ## Usage
-```hcl-terraform
+```hcl
 module "my_metric_filter_alarm" {
-  source = "dwp/terraform-aws-metric-filter-alarm"
+  source = "dwp/metric-filter-alarm/aws"
   
   log_group_name = "MyLogGroup"
   metric_namespace = "MyMetricNamespace"
@@ -14,7 +14,7 @@ module "my_metric_filter_alarm" {
 ```
 ## Examples
 The following example creates a CloudWatch Log Group, Alarm and SNS Topic. The Alarm monitors the Log Group for "ERROR" and if there are more than five occurrences within one hour the Alarm will go into an "ALARM" state and a notification will be sent to the SNS Topic
-```hcl-terraform
+```hcl
 
 resource "aws_cloudwatch_log_group" "MyLogGroup" {
   name = "MyLogGroup"
@@ -26,7 +26,7 @@ resource "aws_sns_topic" "MyTopic" {
 }
 
 module "my_metric_filter_alarm" {
-  source = "dwp/terraform-aws-metric-filter-alarm"
+  source = "dwp/metric-filter-alarm/aws"
   
   log_group_name = "${aws_cloudwatch_log_group.MyLogGroup.name}"
   metric_namespace = "MyMetricNamespace"

main.tf

@@ -18,5 +18,5 @@ resource "aws_cloudwatch_metric_alarm" "metric_alarm" {
   period = "${var.period}"
   threshold = "${var.threshold}"
   statistic = "${var.statistic}"
-  alarm_actions = "${var.alarm_action_arns != "" ? var.alarm_action_arns : ""}"
+  alarm_actions = "${var.alarm_action_arns}"
 }

variables.tf

@@ -25,9 +25,9 @@ variable "metric_filter_name" {
 }
 
 variable "alarm_action_arns" {
-  type = "string"
+  type = "list"
   description = "The list of actions to execute when this alarm transitions into an ALARM state from any other state. Each action is specified as an Amazon Resource Number (ARN)"
-  default = ""
+  default = []
 }
 
 variable "comparison_operator" {