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@Stability(value=Stable)

Package software.amazon.awscdk.services.ecs

Amazon ECS Construct Library

See: Description

Package software.amazon.awscdk.services.ecs Description

Amazon ECS Construct Library

---

cfn-resources: Stable

cdk-constructs: Stable

This package contains constructs for working with Amazon Elastic Container Service (Amazon ECS).

Amazon ECS is a highly scalable, fast, container management service that makes it easy to run, stop, and manage Docker containers on a cluster of Amazon EC2 instances.

For further information on Amazon ECS, see the Amazon ECS documentation

The following example creates an Amazon ECS cluster, adds capacity to it, and instantiates the Amazon ECS Service with an automatic load balancer. 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 import software.amazon.awscdk.services.ecs.*;
 
 // Create an ECS cluster
 Cluster cluster = new Cluster(this, "Cluster", new ClusterProps()
         .vpc(vpc));
 
 // Add capacity to it
 cluster.addCapacity("DefaultAutoScalingGroupCapacity", new AddCapacityOptions()
         .instanceType(new InstanceType("t2.xlarge"))
         .desiredCapacity(3));
 
 Ec2TaskDefinition taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 
 taskDefinition.addContainer("DefaultContainer", new ContainerDefinitionOptions()
         .image(ecs.ContainerImage.fromRegistry("amazon/amazon-ecs-sample"))
         .memoryLimitMiB(512));
 
 // Instantiate an Amazon ECS Service
 Ec2Service ecsService = new Ec2Service(this, "Service", new Ec2ServiceProps()
         .cluster(cluster)
         .taskDefinition(taskDefinition));

For a set of constructs defining common ECS architectural patterns, see the @aws-cdk/aws-ecs-patterns package.

Launch Types: AWS Fargate vs Amazon EC2

There are two sets of constructs in this library; one to run tasks on Amazon EC2 and one to run tasks on AWS Fargate.

Here are the main differences:

For more information on Amazon EC2 vs AWS Fargate and networking see the AWS Documentation: AWS Fargate and Task Networking.

Clusters

A Cluster defines the infrastructure to run your tasks on. You can run many tasks on a single cluster.

The following code creates a cluster that can run AWS Fargate tasks: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object cluster = Cluster.Builder.create(this, "Cluster")
         .vpc(vpc)
         .build();

To use tasks with Amazon EC2 launch-type, you have to add capacity to the cluster in order for tasks to be scheduled on your instances. Typically, you add an AutoScalingGroup with instances running the latest Amazon ECS-optimized AMI to the cluster. There is a method to build and add such an AutoScalingGroup automatically, or you can supply a customized AutoScalingGroup that you construct yourself. It's possible to add multiple AutoScalingGroups with various instance types.

The following example creates an Amazon ECS cluster and adds capacity to it: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object cluster = Cluster.Builder.create(this, "Cluster")
         .vpc(vpc)
         .build();
 
 // Either add default capacity
 cluster.addCapacity("DefaultAutoScalingGroupCapacity", Map.of(
         "instanceType", new InstanceType("t2.xlarge"),
         "desiredCapacity", 3));
 
 // Or add customized capacity. Be sure to start the Amazon ECS-optimized AMI.
 Object autoScalingGroup = AutoScalingGroup.Builder.create(this, "ASG")
         .vpc(vpc)
         .instanceType(new InstanceType("t2.xlarge"))
         .machineImage(EcsOptimizedImage.amazonLinux())
         // Or use Amazon ECS-Optimized Amazon Linux 2 AMI
         // machineImage: EcsOptimizedImage.amazonLinux2(),
         .desiredCapacity(3)
         .build();
 
 cluster.addAutoScalingGroup(autoScalingGroup);

If you omit the property vpc, the construct will create a new VPC with two AZs.

Bottlerocket

Bottlerocket is a Linux-based open source operating system that is purpose-built by AWS for running containers. You can launch Amazon ECS container instances with the Bottlerocket AMI.

NOTICE: The Bottlerocket AMI is in developer preview release for Amazon ECS and is subject to change.

The following example will create a capacity with self-managed Amazon EC2 capacity of 2 c5.large Linux instances running with Bottlerocket AMI.

Note that you must specify either a machineImage or machineImageType, at least one, not both.

The following example adds Bottlerocket capacity to the cluster: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 cluster.addCapacity("bottlerocket-asg", Map.of(
         "minCapacity", 2,
         "instanceType", new InstanceType("c5.large"),
         "machineImageType", ecs.MachineImageType.getBOTTLEROCKET()));

Spot Instances

To add spot instances into the cluster, you must specify the spotPrice in the ecs.AddCapacityOptions and optionally enable the spotInstanceDraining property. 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Add an AutoScalingGroup with spot instances to the existing cluster
 cluster.addCapacity("AsgSpot", Map.of(
         "maxCapacity", 2,
         "minCapacity", 2,
         "desiredCapacity", 2,
         "instanceType", new InstanceType("c5.xlarge"),
         "spotPrice", "0.0735",
         // Enable the Automated Spot Draining support for Amazon ECS
         "spotInstanceDraining", true));

SNS Topic Encryption

When the ecs.AddCapacityOptions that you provide has a non-zero taskDrainTime (the default) then an SNS topic and Lambda are created to ensure that the cluster's instances have been properly drained of tasks before terminating. The SNS Topic is sent the instance-terminating lifecycle event from the AutoScalingGroup, and the Lambda acts on that event. If you wish to engage server-side encryption for this SNS Topic then you may do so by providing a KMS key for the topicEncryptionKey propery of ecs.AddCapacityOptions. 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Given
 Object key = kms.Key(...);
 // Then, use that key to encrypt the lifecycle-event SNS Topic.
 cluster.addCapacity("ASGEncryptedSNS", Map.of(
         "instanceType", new InstanceType("t2.xlarge"),
         "desiredCapacity", 3,
         "topicEncryptionKey", key));

Task definitions

A task Definition describes what a single copy of a task should look like. A task definition has one or more containers; typically, it has one main container (the default container is the first one that's added to the task definition, and it is marked essential) and optionally some supporting containers which are used to support the main container, doings things like upload logs or metrics to monitoring services.

To run a task or service with Amazon EC2 launch type, use the Ec2TaskDefinition. For AWS Fargate tasks/services, use the FargateTaskDefinition. These classes provide a simplified API that only contain properties relevant for that specific launch type.

For a FargateTaskDefinition, specify the task size (memoryLimitMiB and cpu): 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object fargateTaskDefinition = FargateTaskDefinition.Builder.create(this, "TaskDef")
         .memoryLimitMiB(512)
         .cpu(256)
         .build();

To add containers to a task definition, call addContainer(): 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object container = fargateTaskDefinition.addContainer("WebContainer", Map.of(
         // Use an image from DockerHub
         "image", ecs.ContainerImage.fromRegistry("amazon/amazon-ecs-sample")));

For a Ec2TaskDefinition: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object ec2TaskDefinition = Ec2TaskDefinition.Builder.create(this, "TaskDef")
         .networkMode(NetworkMode.getBRIDGE())
         .build();
 
 Object container = ec2TaskDefinition.addContainer("WebContainer", Map.of(
         // Use an image from DockerHub
         "image", ecs.ContainerImage.fromRegistry("amazon/amazon-ecs-sample"),
         "memoryLimitMiB", 1024));

You can specify container properties when you add them to the task definition, or with various methods, e.g.: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 container.addPortMappings(Map.of(
         "containerPort", 3000));

To add data volumes to a task definition, call addVolume(): 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object volume = ecs.Volume("Volume", Map.of(
         // Use an Elastic FileSystem
         "name", "mydatavolume",
         "efsVolumeConfiguration", ecs.EfsVolumeConfiguration(Map.of(
                 "fileSystemId", "EFS"))));
 
 Object container = fargateTaskDefinition.addVolume("mydatavolume");

To use a TaskDefinition that can be used with either Amazon EC2 or AWS Fargate launch types, use the TaskDefinition construct.

When creating a task definition you have to specify what kind of tasks you intend to run: Amazon EC2, AWS Fargate, or both. The following example uses both: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object taskDefinition = TaskDefinition.Builder.create(this, "TaskDef")
         .memoryMiB("512")
         .cpu("256")
         .networkMode(NetworkMode.getAWS_VPC())
         .compatibility(ecs.Compatibility.getEC2_AND_FARGATE())
         .build();

Images

Images supply the software that runs inside the container. Images can be obtained from either DockerHub or from ECR repositories, or built directly from a local Dockerfile.

Environment variables

To pass environment variables to the container, you can use the environment, environmentFiles, and secrets props. 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 taskDefinition.addContainer("container", Map.of(
         "image", ecs.ContainerImage.fromRegistry("amazon/amazon-ecs-sample"),
         "memoryLimitMiB", 1024,
         "environment", Map.of(// clear text, not for sensitive data
                 "STAGE", "prod"),
         "environmentFiles", asList(ecs.EnvironmentFile.fromAsset("./demo-env-file.env"), ecs.EnvironmentFile.fromBucket(s3Bucket, "assets/demo-env-file.env")),
         "secrets", Map.of(// Retrieved from AWS Secrets Manager or AWS Systems Manager Parameter Store at container start-up.
                 "SECRET", ecs.Secret.fromSecretsManager(secret),
                 "DB_PASSWORD", ecs.Secret.fromSecretsManager(dbSecret, "password"), // Reference a specific JSON field, (requires platform version 1.4.0 or later for Fargate tasks)
                 "PARAMETER", ecs.Secret.fromSsmParameter(parameter))));

The task execution role is automatically granted read permissions on the secrets/parameters. Support for environment files is restricted to the EC2 launch type for files hosted on S3. Further details provided in the AWS documentation about specifying environment variables.

Service

A Service instantiates a TaskDefinition on a Cluster a given number of times, optionally associating them with a load balancer. If a task fails, Amazon ECS automatically restarts the task. 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object taskDefinition;
 
 Object service = FargateService.Builder.create(this, "Service")
         .cluster(cluster)
         .taskDefinition(taskDefinition)
         .desiredCount(5)
         .build();

Services by default will create a security group if not provided. If you'd like to specify which security groups to use you can override the securityGroups property.

Deployment circuit breaker and rollback

Amazon ECS deployment circuit breaker automatically rolls back unhealthy service deployments without the need for manual intervention. Use circuitBreaker to enable deployment circuit breaker and optionally enable rollback for automatic rollback. See Using the deployment circuit breaker for more details. 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object service = FargateService.Builder.create(stack, "Service")
         .cluster(cluster)
         .taskDefinition(taskDefinition)
         .circuitBreaker(Map.of("rollback", true))
         .build();

Include an application/network load balancer

Services are load balancing targets and can be added to a target group, which will be attached to an application/network load balancers: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 import software.amazon.awscdk.services.elasticloadbalancingv2.*;
 
 Object service = FargateService.Builder.create(this, "Service").build();
 
 ApplicationLoadBalancer lb = new ApplicationLoadBalancer(this, "LB", new ApplicationLoadBalancerProps().vpc(vpc).internetFacing(true));
 ApplicationListener listener = lb.addListener("Listener", new BaseApplicationListenerProps().port(80));
 ApplicationTargetGroup targetGroup1 = listener.addTargets("ECS1", new AddApplicationTargetsProps()
         .port(80)
         .targets(asList(service)));
 ApplicationTargetGroup targetGroup2 = listener.addTargets("ECS2", new AddApplicationTargetsProps()
         .port(80)
         .targets(asList(service.loadBalancerTarget(Map.of(
                 "containerName", "MyContainer",
                 "containerPort", 8080)))));

Note that in the example above, the default service only allows you to register the first essential container or the first mapped port on the container as a target and add it to a new target group. To have more control over which container and port to register as targets, you can use service.loadBalancerTarget() to return a load balancing target for a specific container and port.

Alternatively, you can also create all load balancer targets to be registered in this service, add them to target groups, and attach target groups to listeners accordingly. 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 import software.amazon.awscdk.services.elasticloadbalancingv2.*;
 
 Object service = FargateService.Builder.create(this, "Service").build();
 
 ApplicationLoadBalancer lb = new ApplicationLoadBalancer(this, "LB", new ApplicationLoadBalancerProps().vpc(vpc).internetFacing(true));
 ApplicationListener listener = lb.addListener("Listener", new BaseApplicationListenerProps().port(80));
 service.registerLoadBalancerTargets(Map.of(
         "containerName", "web",
         "containerPort", 80,
         "newTargetGroupId", "ECS",
         "listener", ecs.ListenerConfig.applicationListener(listener, Map.of(
                 "protocol", elbv2.ApplicationProtocol.getHTTPS()))));

Using a Load Balancer from a different Stack

If you want to put your Load Balancer and the Service it is load balancing to in different stacks, you may not be able to use the convenience methods loadBalancer.addListener() and listener.addTargets().

The reason is that these methods will create resources in the same Stack as the object they're called on, which may lead to cyclic references between stacks. Instead, you will have to create an ApplicationListener in the service stack, or an empty TargetGroup in the load balancer stack that you attach your service to.

See the ecs/cross-stack-load-balancer example for the alternatives.

Include a classic load balancer

Services can also be directly attached to a classic load balancer as targets: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 import software.amazon.awscdk.services.elasticloadbalancing.*;
 
 Object service = Ec2Service.Builder.create(this, "Service").build();
 
 LoadBalancer lb = new LoadBalancer(stack, "LB", new LoadBalancerProps().vpc(vpc));
 lb.addListener(new LoadBalancerListener().externalPort(80));
 lb.addTarget(service);

Similarly, if you want to have more control over load balancer targeting: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 import software.amazon.awscdk.services.elasticloadbalancing.*;
 
 Object service = Ec2Service.Builder.create(this, "Service").build();
 
 LoadBalancer lb = new LoadBalancer(stack, "LB", new LoadBalancerProps().vpc(vpc));
 lb.addListener(new LoadBalancerListener().externalPort(80));
 lb.addTarget(service.getLoadBalancerTarget(), Map.of(
         "containerName", "MyContainer",
         "containerPort", 80));

There are two higher-level constructs available which include a load balancer for you that can be found in the aws-ecs-patterns module:

Task Auto-Scaling

You can configure the task count of a service to match demand. Task auto-scaling is configured by calling autoScaleTaskCount(): 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object scaling = service.autoScaleTaskCount(Map.of("maxCapacity", 10));
 scaling.scaleOnCpuUtilization("CpuScaling", Map.of(
         "targetUtilizationPercent", 50));
 
 scaling.scaleOnRequestCount("RequestScaling", Map.of(
         "requestsPerTarget", 10000,
         "targetGroup", target));

Task auto-scaling is powered by Application Auto-Scaling. See that section for details.

Instance Auto-Scaling

If you're running on AWS Fargate, AWS manages the physical machines that your containers are running on for you. If you're running an Amazon ECS cluster however, your Amazon EC2 instances might fill up as your number of Tasks goes up.

To avoid placement errors, configure auto-scaling for your Amazon EC2 instance group so that your instance count scales with demand. To keep your Amazon EC2 instances halfway loaded, scaling up to a maximum of 30 instances if required: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 Object autoScalingGroup = cluster.addCapacity("DefaultAutoScalingGroup", Map.of(
         "instanceType", new InstanceType("t2.xlarge"),
         "minCapacity", 3,
         "maxCapacity", 30,
         "desiredCapacity", 3,
 
         // Give instances 5 minutes to drain running tasks when an instance is
         // terminated. This is the default, turn this off by specifying 0 or
         // change the timeout up to 900 seconds.
         "taskDrainTime", Duration.seconds(300)));
 
 autoScalingGroup.scaleOnCpuUtilization("KeepCpuHalfwayLoaded", Map.of(
         "targetUtilizationPercent", 50));

See the @aws-cdk/aws-autoscaling library for more autoscaling options you can configure on your instances.

Integration with CloudWatch Events

To start an Amazon ECS task on an Amazon EC2-backed Cluster, instantiate an @aws-cdk/aws-events-targets.EcsTask instead of an Ec2Service: 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 import software.amazon.awscdk.services.events.targets.*;
 
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromAsset(path.resolve(__dirname, "..", "eventhandler-image")),
         "memoryLimitMiB", 256,
         "logging", AwsLogDriver.Builder.create().streamPrefix("EventDemo").build()));
 
 // An Rule that describes the event trigger (in this case a scheduled run)
 Object rule = Rule.Builder.create(this, "Rule")
         .schedule(events.Schedule.expression("rate(1 min)"))
         .build();
 
 // Pass an environment variable to the container 'TheContainer' in the task
 rule.addTarget(new EcsTask(new EcsTaskProps()
         .cluster(cluster)
         .taskDefinition(taskDefinition)
         .taskCount(1)
         .containerOverrides(asList(new ContainerOverride()
                 .containerName("TheContainer")
                 .environment(asList(new TaskEnvironmentVariable()
                         .name("I_WAS_TRIGGERED")
                         .value("From CloudWatch Events")))))));

Log Drivers

Currently Supported Log Drivers:

awslogs Log Driver

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromRegistry("example-image"),
         "memoryLimitMiB", 256,
         "logging", ecs.LogDrivers.awsLogs(Map.of("streamPrefix", "EventDemo"))));

fluentd Log Driver

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromRegistry("example-image"),
         "memoryLimitMiB", 256,
         "logging", ecs.LogDrivers.fluentd()));

gelf Log Driver

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromRegistry("example-image"),
         "memoryLimitMiB", 256,
         "logging", ecs.LogDrivers.gelf(Map.of("address", "my-gelf-address"))));

journald Log Driver

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromRegistry("example-image"),
         "memoryLimitMiB", 256,
         "logging", ecs.LogDrivers.journald()));

json-file Log Driver

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromRegistry("example-image"),
         "memoryLimitMiB", 256,
         "logging", ecs.LogDrivers.jsonFile()));

splunk Log Driver

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromRegistry("example-image"),
         "memoryLimitMiB", 256,
         "logging", ecs.LogDrivers.splunk(Map.of(
                 "token", cdk.SecretValue.secretsManager("my-splunk-token"),
                 "url", "my-splunk-url"))));

syslog Log Driver

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromRegistry("example-image"),
         "memoryLimitMiB", 256,
         "logging", ecs.LogDrivers.syslog()));

firelens Log Driver

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromRegistry("example-image"),
         "memoryLimitMiB", 256,
         "logging", ecs.LogDrivers.firelens(Map.of(
                 "options", Map.of(
                         "Name", "firehose",
                         "region", "us-west-2",
                         "delivery_stream", "my-stream")))));

Generic Log Driver

A generic log driver object exists to provide a lower level abstraction of the log driver configuration. 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 // Create a Task Definition for the container to start
 Object taskDefinition = new Ec2TaskDefinition(this, "TaskDef");
 taskDefinition.addContainer("TheContainer", Map.of(
         "image", ecs.ContainerImage.fromRegistry("example-image"),
         "memoryLimitMiB", 256,
         "logging", GenericLogDriver.Builder.create()
                 .logDriver("fluentd")
                 .options(Map.of(
                         "tag", "example-tag"))
                 .build()));

Capacity Providers

Currently, only FARGATE and FARGATE_SPOT capacity providers are supported.

To enable capacity providers on your cluster, set the capacityProviders field to [FARGATE, FARGATE_SPOT]. Then, specify capacity provider strategies on the capacityProviderStrategies field for your Fargate Service. 

 // Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
 import software.amazon.awscdk.core.*;
 import software.amazon.awscdk.services.ec2.*;
 import lib.*;
 
 App app = new App();
 Stack stack = new Stack(app, "aws-ecs-integ-capacity-provider");
 
 Vpc vpc = new Vpc(stack, "Vpc", new VpcProps().maxAzs(2));
 
 Object cluster = Cluster.Builder.create(stack, "FargateCPCluster")
         .vpc(vpc)
         .capacityProviders(asList("FARGATE", "FARGATE_SPOT"))
         .build();
 
 Object taskDefinition = new FargateTaskDefinition(stack, "TaskDef");
 
 taskDefinition.addContainer("web", Map.of(
         "image", ecs.ContainerImage.fromRegistry("amazon/amazon-ecs-sample")));
 
 FargateService.Builder.create(stack, "FargateService")
         .cluster(cluster)
         .taskDefinition(taskDefinition)
         .capacityProviderStrategies(asList(Map.of(
                 "capacityProvider", "FARGATE_SPOT",
                 "weight", 2), Map.of(
                 "capacityProvider", "FARGATE",
                 "weight", 1)))
         .build();
 
 app.synth();
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