feat: Add support for availability zone rebalancing (#262)

examples/complete/README.md

@@ -62,6 +62,7 @@ No inputs.
 
 | Name | Description |
 |------|-------------|
+| <a name="output_alb_dns_name"></a> [alb\_dns\_name](#output\_alb\_dns\_name) | The DNS name of the load balancer |
 | <a name="output_cluster_arn"></a> [cluster\_arn](#output\_cluster\_arn) | ARN that identifies the cluster |
 | <a name="output_cluster_autoscaling_capacity_providers"></a> [cluster\_autoscaling\_capacity\_providers](#output\_cluster\_autoscaling\_capacity\_providers) | Map of capacity providers created and their attributes |
 | <a name="output_cluster_capacity_providers"></a> [cluster\_capacity\_providers](#output\_cluster\_capacity\_providers) | Map of cluster capacity providers attributes |

examples/complete/main.tf

@@ -151,7 +151,8 @@ module "ecs" {
         }
       ]
 
-      subnet_ids = module.vpc.private_subnets
+      subnet_ids                    = module.vpc.private_subnets
+      availability_zone_rebalancing = "ENABLED"
       security_group_rules = {
         alb_ingress_3000 = {
           type                     = "ingress"

examples/complete/outputs.tf

@@ -35,3 +35,12 @@ output "services" {
   description = "Map of services created and their attributes"
   value       = module.ecs.services
 }
+
+################################################################################
+# Application Load Balancer
+################################################################################
+
+output "alb_dns_name" {
+  description = "The DNS name of the load balancer"
+  value       = module.alb.dns_name
+}

examples/ec2-autoscaling/README.md

@@ -61,6 +61,7 @@ No inputs.
 
 | Name | Description |
 |------|-------------|
+| <a name="output_alb_dns_name"></a> [alb\_dns\_name](#output\_alb\_dns\_name) | The DNS name of the load balancer |
 | <a name="output_cluster_arn"></a> [cluster\_arn](#output\_cluster\_arn) | ARN that identifies the cluster |
 | <a name="output_cluster_autoscaling_capacity_providers"></a> [cluster\_autoscaling\_capacity\_providers](#output\_cluster\_autoscaling\_capacity\_providers) | Map of capacity providers created and their attributes |
 | <a name="output_cluster_capacity_providers"></a> [cluster\_capacity\_providers](#output\_cluster\_capacity\_providers) | Map of cluster capacity providers attributes |

examples/fargate/main.tf

@@ -190,8 +190,9 @@ module "ecs_task_definition" {
   source = "../../modules/service"
 
   # Service
-  name        = "${local.name}-standalone"
-  cluster_arn = module.ecs_cluster.arn
+  name           = "${local.name}-standalone"
+  cluster_arn    = module.ecs_cluster.arn
+  create_service = false
 
   # Task Definition
   volume = {

main.tf

@@ -59,6 +59,7 @@ module "service" {
   # Service
   ignore_task_definition_changes     = try(each.value.ignore_task_definition_changes, false)
   alarms                             = try(each.value.alarms, {})
+  availability_zone_rebalancing      = try(each.value.availability_zone_rebalancing, "DISABLED")
   capacity_provider_strategy         = try(each.value.capacity_provider_strategy, {})
   cluster_arn                        = module.cluster.arn
   deployment_circuit_breaker         = try(each.value.deployment_circuit_breaker, {})

modules/service/main.tf

@@ -1033,8 +1033,8 @@ resource "aws_iam_policy" "task_exec" {
   name_prefix = var.task_exec_iam_role_use_name_prefix ? "${local.task_exec_iam_role_name}-" : null
   description = coalesce(var.task_exec_iam_role_description, "Task execution role IAM policy")
   policy      = data.aws_iam_policy_document.task_exec[0].json
-
-  tags = merge(var.tags, var.task_exec_iam_role_tags)
+  path        = var.task_exec_iam_policy_path
+  tags        = merge(var.tags, var.task_exec_iam_role_tags)
 }
 
 resource "aws_iam_role_policy_attachment" "task_exec" {

modules/service/variables.tf

@@ -42,6 +42,12 @@ variable "availability_zone_rebalancing" {
   default     = null
 }
 
+variable "availability_zone_rebalancing" {
+  description = "Specifies whether to enable availability zone rebalancing"
+  type        = string
+  default     = "DISABLED"
+}
+
 variable "capacity_provider_strategy" {
   description = "Capacity provider strategies to use for the service. Can be one or more"
   type = map(object({
@@ -667,6 +673,12 @@ variable "task_exec_iam_statements" {
   default = null
 }
 
+variable "task_exec_iam_policy_path" {
+  description = "Path for the iam role"
+  type        = string
+  default     = null
+}
+
 ################################################################################
 # Tasks - IAM role
 # https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task-iam-roles.html

wrappers/service/main.tf

@@ -27,6 +27,7 @@ module "wrapper" {
       }
     }
   })
+
   autoscaling_scheduled_actions                = try(each.value.autoscaling_scheduled_actions, var.defaults.autoscaling_scheduled_actions, null)
   availability_zone_rebalancing                = try(each.value.availability_zone_rebalancing, var.defaults.availability_zone_rebalancing, null)
   capacity_provider_strategy                   = try(each.value.capacity_provider_strategy, var.defaults.capacity_provider_strategy, null)