Remove duplicate DLQ and add trigger and alarms for lambda

Author: JuttonS

infrastructure/lambda-pdf-stitching.tf

@@ -13,4 +13,56 @@ module "pdf-stitching-lambda" {
   rest_api_id             = null
   api_execution_arn       = null
   is_invoked_from_gateway = false
+}
+
+resource "aws_lambda_event_source_mapping" "pdf-stitching-lambda" {
+  event_source_arn = module.sqs-stitching-queue.arn
+  function_name    = module.pdf-stitching-lambda.lambda_arn
+
+  depends_on [
+    module.pdf-stitching-lambda
+    module.sqs-stitching
+  ]
+}
+
+module "pdf-stitching-lambda-alarms" {
+  source          = "modules/lambda_alarms
+  lambda_function_name = module.pdf-stitching-lambda.function_name
+  lambda_timeout       = module.pdf-stitching-lambda.timeout
+  lambda_name          = "pdf-stitching-lambda"
+  namespace            = "AWS/Lambda"
+  alarm_actions        = [module.pdf-stitching-alarm-topic.arn]
+  ok_actions           = [module.pdf-stitching-alarm-topic.arn]
+  depends_on           = [module.pdf-stitching-lambda, module.pdf-stitching-alarm-topic]
+}
+
+module "pdf-stitching-alarm-topic" {
+  source                = "./modules/sns"
+  sns_encryption_key_id = module.sns_encryption_key.id
+  current_account_id    = data.aws_caller_identity.current.account_id
+  topic_name            = "pdf-stitching-alarm-topic"
+  topic_protocol        = "lambda"
+  topic_endpoint        = module.pdf-stitching-lambda.lambda_arn
+  delivery_policy = jsonencode({
+    "Version" : "2012-10-17",
+    "Statement" : [
+      {
+        "Effect" : "Allow",
+        "Principal" : {
+          "Service" : "cloudwatch.amazonaws.com"
+        },
+        "Action" : [
+          "SNS:Publish",
+        ],
+        "Condition" : {
+          "ArnLike" : {
+            "aws:SourceArn" : "arn:aws:cloudwatch:eu-west-2:${data.aws_caller_identity.current.account_id}:alarm:*"
+          }
+        }
+        "Resource" : "*"
+      }
+    ]
+  })
+
+  depends_on = [module.pdf-stitching-lambda, module.sns_encryption_key]
 }

infrastructure/sqs-stitching-dlq.tf

@@ -8,4 +8,5 @@ module "sqs-stitching-queue" {
   max_visibility       = 601
   enable_deduplication = true
   enable_fifo          = true
+  enable_dlq           = true
 }