从 AWS CDK 中的 Fargate 集群获取所有服务

Question

I need to be able to get all of the Services given only the Cluster construct in AWS CDK (TypeScript in this example but any language will do).

Something like the following.

import { Cluster, FargateService } from '@aws-cdk/aws-ecs';

private updateClusterServices(cluster: Cluster): void {
  for (const service of cluster.getServices()) {
    // do something with service
  }
}

However there is no such getServices() method on Cluster .

Is there another way to do this or is this fundamentally not possible with CDK for some reason?

Answer 1

Turns out there is a way to do something like this if you at least have the Service name too.

import { Cluster, FargateService } from '@aws-cdk/aws-ecs';

private updateClusterServices(scope: Construct, cluster: Cluster, serviceName: string): void {
  const service = FargateService.fromFargateServiceAttributes(scope, 'FindFargateServices', {
    cluster: cluster,
    serviceName: serviceName,
  });

  console.log(service.serviceArn);

  // do something with service
}

The result appears to be the TaskSet serviceArn.

arn:aws:ecs:ap-southeast-2:1234567890:service/backend

From comparing it with the CLI output.

$ aws ecs describe-services --cluster blue-green-cluster --services backend
{
    "services": [
        {
            "serviceArn": "arn:aws:ecs:ap-southeast-2:1234567890:service/blue-green-cluster/backend",
            "serviceName": "backend",
            "clusterArn": "arn:aws:ecs:ap-southeast-2:1234567890:cluster/blue-green-cluster",
...
            "taskSets": [
                {
                    "taskSetArn": "arn:aws:ecs:ap-southeast-2:1234567890:task-set/blue-green-cluster/backend/ecs-svc/2091139980078414071",
                    "serviceArn": "arn:aws:ecs:ap-southeast-2:1234567890:service/backend",
                    "clusterArn": "arn:aws:ecs:ap-southeast-2:1234567890:cluster/blue-green-cluster",
...
}