refactor(ecs): hide clusterName from Services (#2980)

BREAKING CHANGE:

* **ecs**: `service.clusterName` has been replaced with `.cluster`.

Author: piradeepk

packages/@aws-cdk/aws-codepipeline-actions/lib/ecs/deploy-action.ts

@@ -52,7 +52,7 @@ export class EcsDeployAction extends codepipeline.Action {
       artifactBounds: deployArtifactBounds(),
       inputs: [determineInputArtifact(props)],
       configuration: {
-        ClusterName: props.service.clusterName,
+        ClusterName: props.service.cluster.clusterName,
         ServiceName: props.service.serviceName,
         FileName: props.imageFile && props.imageFile.fileName,
       },

packages/@aws-cdk/aws-ecs/lib/base/base-service.ts

@@ -114,17 +114,16 @@ export abstract class BaseService extends Resource
   public readonly serviceName: string;
 
   /**
-   * Name of this service's cluster
+   * Task definition this service is associated with
    */
-  public readonly clusterName: string;
+  public readonly taskDefinition: TaskDefinition;
 
   /**
-   * Task definition this service is associated with
+   * The cluster this service is scheduled on
    */
-  public readonly taskDefinition: TaskDefinition;
+  public readonly cluster: ICluster;
 
   protected cloudmapService?: cloudmap.Service;
-  protected cluster: ICluster;
   protected loadBalancers = new Array<CfnService.LoadBalancerProperty>();
   protected networkConfiguration?: CfnService.NetworkConfigurationProperty;
   protected serviceRegistries = new Array<CfnService.ServiceRegistryProperty>();
@@ -136,7 +135,6 @@ export abstract class BaseService extends Resource
               id: string,
               props: BaseServiceProps,
               additionalProps: any,
-              clusterName: string,
               taskDefinition: TaskDefinition) {
     super(scope, id, {
       physicalName: props.serviceName,
@@ -178,7 +176,6 @@ export abstract class BaseService extends Resource
     this.serviceArn = resourceIdentifiers.arn;
     this.serviceName = resourceIdentifiers.name;
 
-    this.clusterName = clusterName;
     this.cluster = props.cluster;
 
     if (props.serviceDiscoveryOptions) {
@@ -224,7 +221,7 @@ export abstract class BaseService extends Resource
 
     return this.scalableTaskCount = new ScalableTaskCount(this, 'TaskCount', {
       serviceNamespace: appscaling.ServiceNamespace.ECS,
-      resourceId: `service/${this.clusterName}/${this.serviceName}`,
+      resourceId: `service/${this.cluster.clusterName}/${this.serviceName}`,
       dimension: 'ecs:service:DesiredCount',
       role: this.makeAutoScalingRole(),
       ...props
@@ -238,7 +235,7 @@ export abstract class BaseService extends Resource
     return new cloudwatch.Metric({
       namespace: 'AWS/ECS',
       metricName,
-      dimensions: { ClusterName: this.clusterName, ServiceName: this.serviceName },
+      dimensions: { ClusterName: this.cluster.clusterName, ServiceName: this.serviceName },
       ...props
     });
   }

packages/@aws-cdk/aws-ecs/lib/ec2/ec2-service.ts

@@ -85,11 +85,6 @@ export class Ec2Service extends BaseService implements IEc2Service, elb.ILoadBal
     return new Import(scope, id);
   }
 
-  /**
-   * Name of the cluster
-   */
-  public readonly clusterName: string;
-
   private readonly constraints: CfnService.PlacementConstraintProperty[];
   private readonly strategies: CfnService.PlacementStrategyProperty[];
   private readonly daemon: boolean;
@@ -125,9 +120,8 @@ export class Ec2Service extends BaseService implements IEc2Service, elb.ILoadBal
       placementConstraints: Lazy.anyValue({ produce: () => this.constraints }, { omitEmptyArray: true }),
       placementStrategies: Lazy.anyValue({ produce: () => this.strategies }, { omitEmptyArray: true }),
       schedulingStrategy: props.daemon ? 'DAEMON' : 'REPLICA',
-    }, props.cluster.clusterName, props.taskDefinition);
+    }, props.taskDefinition);
 
-    this.clusterName = props.cluster.clusterName;
     this.constraints = [];
     this.strategies = [];
     this.daemon = props.daemon || false;

packages/@aws-cdk/aws-ecs/lib/fargate/fargate-service.ts

@@ -78,7 +78,7 @@ export class FargateService extends BaseService implements IFargateService {
       taskDefinition: props.taskDefinition.taskDefinitionArn,
       launchType: 'FARGATE',
       platformVersion: props.platformVersion,
-    }, props.cluster.clusterName, props.taskDefinition);
+    }, props.taskDefinition);
 
     this.configureAwsVpcNetworking(props.cluster.vpc, props.assignPublicIp, props.vpcSubnets, props.securityGroup);