feat: add support for additional tags in auto-scaling-group that can be attached to EC2 instances at launch

Author: Premdeep Saini

auto_scaling_groups.tf

@@ -36,6 +36,14 @@ resource "aws_autoscaling_group" "ecs_cluster_asg" {
     propagate_at_launch = true
     value               = var.environment
   }
+  dynamic "tag" {
+    for_each = each.value.additional_tags
+    content {
+      key                 = tag.value.key
+      value               = tag.value.value
+      propagate_at_launch = tag.value.propagate_at_launch
+    }
+  }
   lifecycle {
     create_before_destroy = true
   }

variables.tf

@@ -24,9 +24,15 @@ variable "asg" {
     max_size                  = number
     min_size                  = number
     protect_from_scale_in     = bool
+    additional_tags = list(object({
+      key                 = string
+      value               = string
+      propagate_at_launch = bool
+    }))
   }))
   description = "Autoscaling group configuration."
 }
+
 variable "launch_configs" {
   type = list(object({
     name                      = string