如何修复 CloudFormation 错误“提供的负载均衡器可能无效。请确保它们存在并重试

Question

当我尝试使用以下 cloudformation yml 文件使用应用程序负载均衡器创建 Autoscale 组时

    LoadBalancer: 
      Type: AWS::ElasticLoadBalancingV2::LoadBalancer
      Properties: 
        Type: application
        Subnets: 
          Ref: VPCZoneIdentifier  

    AutoScalingGroup:
      Type: AWS::AutoScaling::AutoScalingGroup
      DependsOn: LoadBalancer
      Properties:
        AvailabilityZones: 
          Ref: "AvailabilityZones"
        Cooldown: 120
        DesiredCapacity:
          Ref: DesiredCapacityASG
        LaunchConfigurationName: 
          Ref: LaunchConfiguration
        MaxSize:
          Ref: MaxSizeASG
        MinSize:
          Ref: MinSizeASG
        LoadBalancerNames: 
          - Ref: "LoadBalancer"
        TargetGroupARNs:
          - !Ref TargetGroup

我收到一条错误消息：“提供的负载均衡器可能无效。请确保它们存在并重试。（服务：AmazonAutoScaling；状态代码：400；错误代码：ValidationError；请求 ID：）”

Answer 1

这个错误是发生是因为你使用LoadBalancerNames的应用负载均衡器，因为它注意到这里

修复它：删除 LoadBalancerNames并将TargetGroupARNs保留在属性中

LoadBalancerNames:
- Ref: "LoadBalancer"

所以 yml 文件将类似于：

    AutoScalingGroup:
      Type: AWS::AutoScaling::AutoScalingGroup
      DependsOn: LoadBalancer
      Properties:
        AvailabilityZones: 
          Ref: "AvailabilityZones"
        Cooldown: 120
        DesiredCapacity:
          Ref: DesiredCapacityASG
        LaunchConfigurationName: 
          Ref: LaunchConfiguration
        MaxSize:
          Ref: MaxSizeASG
        MinSize:
          Ref: MinSizeASG
        TargetGroupARNs:
          - !Ref TargetGroup