feat: Support maximum concurrency of Lambda Alias with SQS as an event source (#457)

Co-authored-by: Anton Babenko <anton@antonbabenko.com>

Author: Lucas Fauchille

examples/alias/main.tf

@@ -74,8 +74,9 @@ module "alias_no_refresh" {
 
   event_source_mapping = {
     sqs = {
-      service          = "sqs"
-      event_source_arn = module.sqs_events.sqs_queue_arn
+      service             = "sqs"
+      event_source_arn    = module.sqs_events.sqs_queue_arn
+      maximum_concurrency = 10
     }
   }
 

modules/alias/main.tf

@@ -141,6 +141,13 @@ resource "aws_lambda_event_source_mapping" "this" {
     }
   }
 
+  dynamic "scaling_config" {
+    for_each = try([each.value.scaling_config], [])
+    content {
+      maximum_concurrency = try(scaling_config.value.maximum_concurrency, null)
+    }
+  }
+
   dynamic "self_managed_event_source" {
     for_each = try(each.value.self_managed_event_source, [])
     content {