aws-ecs-patterns error: Cluster for this service needs Ec2 capacity. Call addXxxCapacity() on the cluster

Question

根据 AWS CDK 文档，如果 I declare my VPC then I shouldn't declare 'capacity'，希望有人能在这里帮助我，但是当我运行 cdk synth 时，我收到以下错误。 ..

throw new Error(Validation failed with the following errors:\n ${errorList});

Error: Validation failed with the following errors: [PrerenderInfrasctutureStack/preRenderApp/Service] Cluster for this service needs Ec2 capacity. Call addXxxCapacity() on the cluster.

这是我的代码... （我希望 Nathan Peck 看到这个）

const ec2 = require('@aws-cdk/aws-ec2');
const ecsPattern = require('@aws-cdk/aws-ecs-patterns');
const ecs = require('@aws-cdk/aws-ecs');
class PrerenderInfrasctutureStack extends cdk.Stack {
  /**
   *
   * @param {cdk.Construct} scope
   * @param {string} id
   * @param {cdk.StackProps=} props
   */


  constructor(scope, id, props) {
    super(scope, id, props);

    const myVPC = ec2.Vpc.fromLookup(this, 'publicVpc', {
      vpcId:'vpc-xxx'
    });


    const preRenderApp = new ecsPattern.ApplicationLoadBalancedEc2Service(this, 'preRenderApp', {
      vpcId: myVPC,
      certificate: 'arn:aws:acm:ap-southeast-2:xxx:certificate/xxx', //becuase this is spcified, then the LB will automatically use HTTPS
      domainName: 'my-dev.com.au.',
      domainZone:'my-dev.com.au',
      listenerPort: 443,
      publicLoadBalancer: true,
      memoryReservationMiB: 8,
      cpu: 4096,
      desiredCount: 1,
      taskImageOptions:{
        image: ecs.ContainerImage.fromRegistry('xxx.dkr.ecr.region.amazonaws.com/express-prerender-server'), 
        containerPort: 3000
      },
    });


  }

}


module.exports = { PrerenderInfrasctutureStack }

Answer 1

这是因为如果您没有明确传递集群，那么它会使用您帐户中存在的默认集群。然而，默认集群开始时没有 EC2 容量，因为 EC2 实例在运行时会产生费用。您可以将空的默认集群与 Fargate 模式一起使用，因为 Fargate 不需要 EC2 容量，它只是运行s 您在 Fargate 中的容器，但是在您将 EC2 实例添加到集群之前，默认集群将无法使用 EC2 模式.

此处的简单解决方案是改用 ApplicationLoadBalancedFargateService，因为 Fargate 服务运行使用 Fargate 容量，因此它们不需要集群中的 EC2 实例。或者，您应该使用类似以下内容定义自己的集群：

// Create an ECS cluster
const cluster = new ecs.Cluster(this, 'Cluster', {
  vpc,
});

// Add capacity to it
cluster.addCapacity('DefaultAutoScalingGroupCapacity', {
  instanceType: new ec2.InstanceType("t2.xlarge"),
  desiredCapacity: 3,
});

然后在创建 ApplicationLoadBalancedEc2Service

时将该集群作为属性传递

希望对您有所帮助！

aws-ecs-patterns error: Cluster for this service needs Ec2 capacity. Call addXxxCapacity() on the cluster

aws-ecs-patterns error: Cluster for this service needs Ec2 capacity. Call addXxxCapacity() on the cluster

amazon-ecs

aws-cdk

infrastructure-as-code