adding options custom alert messaging (#43)

Author: kuntalkumarbasu

monitoring.tf

@@ -15,6 +15,7 @@ resource "datadog_monitor" "dead_letters_monitor" {
   type = "metric alert"
   name = "${each.key}-monitor"
   message = templatefile("${path.module}/templates/dl_monitor.tmpl", {
+    dl_alert_message        = var.dl_alert_message
     dead_letters_queue_name = each.key
     notify                  = join(", ", var.dl_alert_recipients)
   })

templates/dl_monitor.tmpl

@@ -2,6 +2,9 @@
 Monitor state: :redalert: at {{last_triggered_at}} UTC
 
 Dead letters detected in dead letter queue ${dead_letters_queue_name}
+
+${dl_alert_message}
+
 They are there for 1 hour
 {{/is_alert}}
 

variables.tf

@@ -250,6 +250,11 @@ variable "dl_alert_recipients" {
   description = "List of the alert recipients"
 }
 
+variable "dl_alert_message" {
+  type    = string
+  default = ""
+}
+
 variable "dl_warning" {
   type        = number
   default     = 0