fix(ecs): Move AvailabilityZoneRebalancing into aws-ecs-patterns.

Author: Karthik Kumar Viswanathan

packages/aws-cdk-lib/aws-ecs-patterns/lib/availability-zone-rebalancing.ts

@@ -0,0 +1,16 @@
+/**
+ * Indicates whether to use Availability Zone rebalancing for an ECS service.
+ *
+ * @see https://docs.aws.amazon.com/AmazonECS/latest/developerguide/service-rebalancing.html
+ */
+export enum AvailabilityZoneRebalancing {
+  /**
+   * Availability zone rebalancing is enabled.
+   */
+  ENABLED = 'ENABLED',
+
+  /**
+   * Availability zone rebalancing is disabled.
+   */
+  DISABLED = 'DISABLED',
+}

packages/aws-cdk-lib/aws-ecs-patterns/lib/base/fargate-service-base.ts

@@ -1,4 +1,5 @@
 import { FargatePlatformVersion, FargateTaskDefinition, RuntimePlatform } from '../../../aws-ecs';
+import { AvailabilityZoneRebalancing } from '../availability-zone-rebalancing';
 
 export interface FargateServiceBaseProps {
   /**
@@ -89,4 +90,15 @@ export interface FargateServiceBaseProps {
    * @default - If the property is undefined, `operatingSystemFamily` is LINUX and `cpuArchitecture` is X86_64
    */
   readonly runtimePlatform?: RuntimePlatform;
+
+  /**
+   * Whether to use Availability Zone rebalancing for the service.
+   *
+   * If enabled, `maxHealthyPercent` must be greater than 100, and the service must not be a target
+   * of a Classic Load Balancer.
+   *
+   * @see https://docs.aws.amazon.com/AmazonECS/latest/developerguide/service-rebalancing.html
+   * @default AvailabilityZoneRebalancing.DISABLED
+   */
+  readonly availabilityZoneRebalancing?: AvailabilityZoneRebalancing;
 }

packages/aws-cdk-lib/aws-ecs-patterns/lib/index.ts

@@ -22,3 +22,5 @@ export * from './fargate/application-multiple-target-groups-fargate-service';
 export * from './base/network-multiple-target-groups-service-base';
 export * from './ecs/network-multiple-target-groups-ecs-service';
 export * from './fargate/network-multiple-target-groups-fargate-service';
+
+export * from './availability-zone-rebalancing';

packages/aws-cdk-lib/aws-ecs/lib/availability-zone-rebalancing.ts

@@ -1,16 +1 @@
-/**
- * Indicates whether to use Availability Zone rebalancing for an ECS service.
- *
- * @see https://docs.aws.amazon.com/AmazonECS/latest/developerguide/service-rebalancing.html
- */
-export enum AvailabilityZoneRebalancing {
-  /**
-   * Availability zone rebalancing is enabled.
-   */
-  ENABLED = 'ENABLED',
-
-  /**
-   * Availability zone rebalancing is disabled.
-   */
-  DISABLED = 'DISABLED',
-}
+import AvailabilityZoneRebalancing from '../../aws-ecs-patterns';