Merge pull request #63 from NHSDigital/feature/CCM-8569_Event_Publisher_DLQ_Alerting

CCM-8589: Event Publisher DLQ Alerting

Author: jamesthompson26-nhs

infrastructure/modules/eventpub/cloudwatch_metric_alarm_dlq_alarm.tf

@@ -0,0 +1,16 @@
+resource "aws_cloudwatch_metric_alarm" "dlq_alarm" {
+  alarm_name          = "${local.csi}-dlq-messages-alarm"
+  alarm_description   = "Alarm for messages in the DLQ"
+  comparison_operator = "GreaterThanThreshold"
+  evaluation_periods  = 1
+  metric_name         = "ApproximateNumberOfMessagesVisible"
+  namespace           = "AWS/SQS"
+  period              = 300
+  statistic           = "Sum"
+  threshold           = 0
+  actions_enabled     = true
+
+  dimensions = {
+    QueueName = aws_sqs_queue.dlq.name
+  }
+}