feat(ecs-patterns): Add PlatformVersion option to ScheduledFargateTask props (#12676)

Add the platformversion as an extra option to the Fargate Scheduled Task

closes #12623

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: richardhughes

packages/@aws-cdk/aws-ecs-patterns/README.md

@@ -427,3 +427,17 @@ const loadBalancedFargateService = new ApplicationLoadBalancedFargateService(sta
   },
 });
 ```
+
+### Set PlatformVersion for ScheduledFargateTask
+
+```ts
+const scheduledFargateTask = new ScheduledFargateTask(stack, 'ScheduledFargateTask', {
+  cluster,
+  scheduledFargateTaskImageOptions: {
+    image: ecs.ContainerImage.fromRegistry('amazon/amazon-ecs-sample'),
+    memoryLimitMiB: 512,
+  },
+  schedule: events.Schedule.expression('rate(1 minute)'),
+  platformVersion: ecs.FargatePlatformVersion.VERSION1_4,
+});
+```

packages/@aws-cdk/aws-ecs-patterns/lib/base/scheduled-task-base.ts

@@ -165,11 +165,20 @@ export abstract class ScheduledTaskBase extends CoreConstruct {
       subnetSelection: this.subnetSelection,
     });
 
-    this.eventRule.addTarget(eventRuleTarget);
+    this.addTaskAsTarget(eventRuleTarget);
 
     return eventRuleTarget;
   }
 
+  /**
+   * Adds task as a target of the scheduled event rule.
+   *
+   * @param ecsTaskTarget the EcsTask to add to the event rule
+   */
+  protected addTaskAsTarget(ecsTaskTarget: EcsTask) {
+    this.eventRule.addTarget(ecsTaskTarget);
+  }
+
   /**
    * Returns the default cluster.
    */

packages/@aws-cdk/aws-ecs-patterns/lib/fargate/scheduled-fargate-task.ts

@@ -1,4 +1,5 @@
-import { FargateTaskDefinition } from '@aws-cdk/aws-ecs';
+import { FargateTaskDefinition, FargatePlatformVersion } from '@aws-cdk/aws-ecs';
+import { EcsTask } from '@aws-cdk/aws-events-targets';
 import { Construct } from 'constructs';
 import { ScheduledTaskBase, ScheduledTaskBaseProps, ScheduledTaskImageProps } from '../base/scheduled-task-base';
 
@@ -21,6 +22,17 @@ export interface ScheduledFargateTaskProps extends ScheduledTaskBaseProps {
    * @default none
    */
   readonly scheduledFargateTaskImageOptions?: ScheduledFargateTaskImageOptions;
+
+  /**
+   * The platform version on which to run your service.
+   *
+   * If one is not specified, the LATEST platform version is used by default. For more information, see
+   * [AWS Fargate Platform Versions](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/platform_versions.html)
+   * in the Amazon Elastic Container Service Developer Guide.
+   *
+   * @default Latest
+   */
+  readonly platformVersion?: FargatePlatformVersion;
 }
 
 /**
@@ -109,6 +121,15 @@ export class ScheduledFargateTask extends ScheduledTaskBase {
       throw new Error('You must specify one of: taskDefinition or image');
     }
 
-    this.addTaskDefinitionToEventTarget(this.taskDefinition);
+    // Use the EcsTask as the target of the EventRule
+    const eventRuleTarget = new EcsTask( {
+      cluster: this.cluster,
+      taskDefinition: this.taskDefinition,
+      taskCount: this.desiredTaskCount,
+      subnetSelection: this.subnetSelection,
+      platformVersion: props.platformVersion,
+    });
+
+    this.addTaskAsTarget(eventRuleTarget);
   }
 }

packages/@aws-cdk/aws-ecs-patterns/test/fargate/test.scheduled-fargate-task.ts

@@ -294,6 +294,60 @@ export = {
       ],
     }));
 
+    test.done();
+  },
+  'Scheduled Fargate Task - with platformVersion defined'(test: Test) {
+    // GIVEN
+    const stack = new cdk.Stack();
+    const vpc = new ec2.Vpc(stack, 'Vpc', { maxAzs: 1 });
+    const cluster = new ecs.Cluster(stack, 'EcsCluster', { vpc });
+
+    new ScheduledFargateTask(stack, 'ScheduledFargateTask', {
+      cluster,
+      scheduledFargateTaskImageOptions: {
+        image: ecs.ContainerImage.fromRegistry('henk'),
+        memoryLimitMiB: 512,
+      },
+      schedule: events.Schedule.expression('rate(1 minute)'),
+      platformVersion: ecs.FargatePlatformVersion.VERSION1_4,
+    });
+
+    // THEN
+    expect(stack).to(haveResource('AWS::Events::Rule', {
+      Targets: [
+        {
+          Arn: { 'Fn::GetAtt': ['EcsCluster97242B84', 'Arn'] },
+          EcsParameters: {
+            LaunchType: 'FARGATE',
+            NetworkConfiguration: {
+              AwsVpcConfiguration: {
+                AssignPublicIp: 'DISABLED',
+                SecurityGroups: [
+                  {
+                    'Fn::GetAtt': [
+                      'ScheduledFargateTaskScheduledTaskDefSecurityGroupE075BC19',
+                      'GroupId',
+                    ],
+                  },
+                ],
+                Subnets: [
+                  {
+                    Ref: 'VpcPrivateSubnet1Subnet536B997A',
+                  },
+                ],
+              },
+            },
+            PlatformVersion: '1.4.0',
+            TaskCount: 1,
+            TaskDefinitionArn: { Ref: 'ScheduledFargateTaskScheduledTaskDef521FA675' },
+          },
+          Id: 'Target0',
+          Input: '{}',
+          RoleArn: { 'Fn::GetAtt': ['ScheduledFargateTaskScheduledTaskDefEventsRole6CE19522', 'Arn'] },
+        },
+      ],
+    }));
+
     test.done();
   },
 };