Configure Application Auto Scaling resources with AWS CloudFormation - AWS CloudFormation
Create a scaling policy for an AppStream fleetCreate a scaling policy for an Aurora DB clusterCreate a scaling policy for a DynamoDB tableCreate a scaling policy for an Amazon ECS service (metrics: average CPU and memory)Create a scaling policy for an Amazon ECS service (metric: average request count per target)Create a scheduled action with a cron expression for a Lambda functionCreate a scheduled action with an at expression for a Spot Fleet

Configure Application Auto Scaling resources with AWS CloudFormation

This section provides AWS CloudFormation template examples for Application Auto Scaling scaling policies and scheduled actions for different AWS resources.

Important

When an Application Auto Scaling snippet is included in the template, you might need to declare a dependency on the specific scalable resource that's created through the template using theDependsOn attribute. This overrides the default parallelism and directs AWS CloudFormation to operate on resources in a specified order. Otherwise, the scaling configuration might be applied before the resource has been set up completely.

Create a scaling policy for an AppStream fleet

This snippet shows how to create a policy and apply it to an AWS::AppStream::Fleet resource using the AWS::ApplicationAutoScaling::ScalingPolicy resource. The AWS::ApplicationAutoScaling::ScalableTarget resource declares a scalable target to which this policy is applied. Application Auto Scaling can scale the number of fleet instances at a minimum of 1 instance and a maximum of 20. The policy keeps the average capacity utilization of the fleet at 75 percent, with scale-out and scale-in cooldown periods of 300 seconds (5 minutes).

It uses the Fn::Join and Ref intrinsic functions to construct the ResourceId property with the logical name of the AWS::AppStream::Fleet resource that's specified in the same template.

JSON

{
  "Resources" : {
    "ScalableTarget" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalableTarget",
      "Properties" : {
        "MaxCapacity" : 20,
        "MinCapacity" : 1,
        "RoleARN" : { "Fn::Sub" : "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/appstream.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_AppStreamFleet" },
        "ServiceNamespace" : "appstream",
        "ScalableDimension" : "appstream:fleet:DesiredCapacity",
        "ResourceId" : {
          "Fn::Join" : [
            "/",
            [
              "fleet",
              {
                "Ref" : "logicalName"
              }
            ]
          ]
        }
      }
    },
    "ScalingPolicyAppStreamFleet" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalingPolicy",
      "Properties" : {
        "PolicyName" : { "Fn::Sub" : "${AWS::StackName}-target-tracking-cpu75" },
        "PolicyType" : "TargetTrackingScaling",
        "ServiceNamespace" : "appstream",
        "ScalableDimension" : "appstream:fleet:DesiredCapacity",
        "ResourceId" : {
          "Fn::Join" : [
            "/",
            [
              "fleet",
              {
                "Ref" : "logicalName"
              }
            ]
          ]
        },
        "TargetTrackingScalingPolicyConfiguration" : {
          "TargetValue" : 75,
          "PredefinedMetricSpecification" : {
            "PredefinedMetricType" : "AppStreamAverageCapacityUtilization"
          },
          "ScaleInCooldown" : 300,
          "ScaleOutCooldown" : 300
        }
      }
    } 
  }
}

YAML

---
Resources:
  ScalableTarget:
    Type: AWS::ApplicationAutoScaling::ScalableTarget
    Properties:
      MaxCapacity: 20
      MinCapacity: 1
      RoleARN: 
        Fn::Sub: 'arn:aws:iam::${AWS::AccountId}:role/aws-service-role/appstream.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_AppStreamFleet'
      ServiceNamespace: appstream
      ScalableDimension: appstream:fleet:DesiredCapacity
      ResourceId: !Join
        - /
        - - fleet
          - !Ref logicalName
  ScalingPolicyAppStreamFleet:
    Type: AWS::ApplicationAutoScaling::ScalingPolicy
    Properties:
      PolicyName: !Sub ${AWS::StackName}-target-tracking-cpu75
      PolicyType: TargetTrackingScaling
      ServiceNamespace: appstream
      ScalableDimension: appstream:fleet:DesiredCapacity
      ResourceId: !Join
        - /
        - - fleet
          - !Ref logicalName
      TargetTrackingScalingPolicyConfiguration:
        TargetValue: 75
        PredefinedMetricSpecification:
          PredefinedMetricType: AppStreamAverageCapacityUtilization
        ScaleInCooldown: 300
        ScaleOutCooldown: 300

Create a scaling policy for an Aurora DB cluster

In this snippet, you register an AWS::RDS::DBCluster resource. The AWS::ApplicationAutoScaling::ScalableTarget resource indicates that the DB cluster should be dynamically scaled to have from one to eight Aurora Replicas. You also apply a target tracking scaling policy to the cluster using the AWS::ApplicationAutoScaling::ScalingPolicy resource.

In this configuration, the RDSReaderAverageCPUUtilization predefined metric is used to adjust an Aurora DB cluster based on an average CPU utilization of 40 percent across all Aurora Replicas in that Aurora DB cluster. The configuration provides a scale-in cooldown period of 10 minutes and a scale-out cooldown period of 5 minutes.

This example uses the Fn::Sub intrinsic function to construct the ResourceId property with the logical name of the AWS::RDS::DBCluster resource that is specified in the same template.

JSON

{
  "Resources" : {
    "ScalableTarget" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalableTarget",
      "Properties" : {
        "MaxCapacity" : 8,
        "MinCapacity" : 1,
        "RoleARN" : { "Fn::Sub" : "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/rds.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_RDSCluster" },
        "ServiceNamespace" : "rds",
        "ScalableDimension" : "rds:cluster:ReadReplicaCount",
        "ResourceId" : { "Fn::Sub" : "cluster:${logicalName}" }
      }
    },
    "ScalingPolicyDBCluster" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalingPolicy",
      "Properties" : {
        "PolicyName" : { "Fn::Sub" : "${AWS::StackName}-target-tracking-cpu40" },
        "PolicyType" : "TargetTrackingScaling",
        "ServiceNamespace" : "rds",
        "ScalableDimension" : "rds:cluster:ReadReplicaCount",
        "ResourceId" : { "Fn::Sub" : "cluster:${logicalName}" }, 
        "TargetTrackingScalingPolicyConfiguration" : {
          "TargetValue" : 40,
          "PredefinedMetricSpecification" : {
            "PredefinedMetricType" : "RDSReaderAverageCPUUtilization"
          },
          "ScaleInCooldown" : 600,
          "ScaleOutCooldown" : 300
        }
      }
    }
  }
}

YAML

---
Resources:
  ScalableTarget:
    Type: AWS::ApplicationAutoScaling::ScalableTarget
    Properties:
      MaxCapacity: 8
      MinCapacity: 1
      RoleARN: 
        Fn::Sub: 'arn:aws:iam::${AWS::AccountId}:role/aws-service-role/rds.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_RDSCluster'
      ServiceNamespace: rds
      ScalableDimension: rds:cluster:ReadReplicaCount
      ResourceId: !Sub cluster:${logicalName}
  ScalingPolicyDBCluster:
    Type: AWS::ApplicationAutoScaling::ScalingPolicy
    Properties:
      PolicyName: !Sub ${AWS::StackName}-target-tracking-cpu40
      PolicyType: TargetTrackingScaling
      ServiceNamespace: rds
      ScalableDimension: rds:cluster:ReadReplicaCount
      ResourceId: !Sub cluster:${logicalName}
      TargetTrackingScalingPolicyConfiguration:
        TargetValue: 40
        PredefinedMetricSpecification:
          PredefinedMetricType: RDSReaderAverageCPUUtilization
        ScaleInCooldown: 600
        ScaleOutCooldown: 300

Create a scaling policy for a DynamoDB table

This snippet shows how to create a policy with the TargetTrackingScaling policy type and apply it to an AWS::DynamoDB::Table resource using the AWS::ApplicationAutoScaling::ScalingPolicy resource. The AWS::ApplicationAutoScaling::ScalableTarget resource declares a scalable target to which this policy is applied, with a minimum of five write capacity units and a maximum of 15. The scaling policy scales the table's write capacity throughput to maintain the target utilization at 50 percent based on the DynamoDBWriteCapacityUtilization predefined metric.

It uses the Fn::Join and Ref intrinsic functions to construct the ResourceId property with the logical name of the AWS::DynamoDB::Table resource that's specified in the same template.

Note

For more information about how to create an AWS CloudFormation template for DynamoDB resources, see the blog post How to use AWS CloudFormation to configure auto scaling for Amazon DynamoDB tables and indexes on the AWS Database Blog.

JSON

{
  "Resources" : {
    "WriteCapacityScalableTarget" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalableTarget",
      "Properties" : {
        "MaxCapacity" : 15,
        "MinCapacity" : 5,
        "RoleARN" : { "Fn::Sub" : "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/dynamodb.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_DynamoDBTable" },
        "ServiceNamespace" : "dynamodb",
        "ScalableDimension" : "dynamodb:table:WriteCapacityUnits",
        "ResourceId" : {
          "Fn::Join" : [
            "/",
            [
              "table",
              {
                "Ref" : "logicalName"
              }
            ]
          ]
        }
      }
    },
    "WriteScalingPolicy" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalingPolicy",
      "Properties" : {
        "PolicyName" : "WriteScalingPolicy",
        "PolicyType" : "TargetTrackingScaling",
        "ScalingTargetId" : { "Ref" : "WriteCapacityScalableTarget" },
        "TargetTrackingScalingPolicyConfiguration" : {
          "TargetValue" : 50.0,
          "ScaleInCooldown" : 60,
          "ScaleOutCooldown" : 60,
          "PredefinedMetricSpecification" : {
            "PredefinedMetricType" : "DynamoDBWriteCapacityUtilization"
          }
        }
      }
    }
  }
}

YAML

---
Resources:
  WriteCapacityScalableTarget:
    Type: AWS::ApplicationAutoScaling::ScalableTarget
    Properties:
      MaxCapacity: 15
      MinCapacity: 5
      RoleARN: 
        Fn::Sub: 'arn:aws:iam::${AWS::AccountId}:role/aws-service-role/dynamodb.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_DynamoDBTable'
      ServiceNamespace: dynamodb
      ScalableDimension: dynamodb:table:WriteCapacityUnits
      ResourceId: !Join
        - /
        - - table
          - !Ref logicalName
  WriteScalingPolicy:
    Type: AWS::ApplicationAutoScaling::ScalingPolicy
    Properties:
      PolicyName: WriteScalingPolicy
      PolicyType: TargetTrackingScaling
      ScalingTargetId: !Ref WriteCapacityScalableTarget
      TargetTrackingScalingPolicyConfiguration:
        TargetValue: 50.0
        ScaleInCooldown: 60
        ScaleOutCooldown: 60
        PredefinedMetricSpecification:
          PredefinedMetricType: DynamoDBWriteCapacityUtilization

Create a scaling policy for an Amazon ECS service (metrics: average CPU and memory)

This snippet shows how to create a policy and apply it to an AWS::ECS::Service resource using the AWS::ApplicationAutoScaling::ScalingPolicy resource. The AWS::ApplicationAutoScaling::ScalableTarget resource declares a scalable target to which this policy is applied. Application Auto Scaling can scale the number of tasks at a minimum of 1 task and a maximum of 6.

It creates two scaling policies with the TargetTrackingScaling policy type. The policies are used to scale the ECS service based on the service's average CPU and memory usage. It uses the Fn::Join and Ref intrinsic functions to construct the ResourceId property with the logical names of the AWS::ECS::Cluster (myContainerCluster) and AWS::ECS::Service (myService) resources that are specified in the same template.

JSON

{
  "Resources" : {
    "ECSScalableTarget" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalableTarget",
      "Properties" : {
        "MaxCapacity" : "6",
        "MinCapacity" : "1",
        "RoleARN" : { "Fn::Sub" : "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/ecs.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_ECSService" },
        "ServiceNamespace" : "ecs",
        "ScalableDimension" : "ecs:service:DesiredCount",
        "ResourceId" : {
          "Fn::Join" : [
            "/",
            [
              "service",
              {
                "Ref" : "myContainerCluster"
              },
              {
                "Fn::GetAtt" : [
                  "myService",
                  "Name"
                ]
              }
            ]
          ]
        }
      }
    },
    "ServiceScalingPolicyCPU" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalingPolicy",
      "Properties" : {
        "PolicyName" : { "Fn::Sub" : "${AWS::StackName}-target-tracking-cpu70" },
        "PolicyType" : "TargetTrackingScaling",
        "ScalingTargetId" : { "Ref" : "ECSScalableTarget" },
        "TargetTrackingScalingPolicyConfiguration" : {
          "TargetValue" : 70.0,
          "ScaleInCooldown" : 180,
          "ScaleOutCooldown" : 60,
          "PredefinedMetricSpecification" : {
            "PredefinedMetricType" : "ECSServiceAverageCPUUtilization"
          }
        }
      }
    },
    "ServiceScalingPolicyMem" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalingPolicy",
      "Properties" : {
        "PolicyName" : { "Fn::Sub" : "${AWS::StackName}-target-tracking-mem90" },
        "PolicyType" : "TargetTrackingScaling",
        "ScalingTargetId" : { "Ref" : "ECSScalableTarget" },
        "TargetTrackingScalingPolicyConfiguration" : {
          "TargetValue" : 90.0,
          "ScaleInCooldown" : 180,
          "ScaleOutCooldown" : 60,
          "PredefinedMetricSpecification" : {
            "PredefinedMetricType" : "ECSServiceAverageMemoryUtilization"
          }
        }
      }
    }
  }
}

YAML

---
Resources:
  ECSScalableTarget:
    Type: AWS::ApplicationAutoScaling::ScalableTarget
    Properties:
      MaxCapacity: 6
      MinCapacity: 1  
      RoleARN: 
        Fn::Sub: 'arn:aws:iam::${AWS::AccountId}:role/aws-service-role/ecs.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_ECSService'
      ServiceNamespace: ecs
      ScalableDimension: 'ecs:service:DesiredCount'
      ResourceId: !Join 
        - /
        - - service
          - !Ref myContainerCluster
          - !GetAtt myService.Name
  ServiceScalingPolicyCPU:
    Type: AWS::ApplicationAutoScaling::ScalingPolicy
    Properties:
      PolicyName: !Sub ${AWS::StackName}-target-tracking-cpu70
      PolicyType: TargetTrackingScaling
      ScalingTargetId: !Ref ECSScalableTarget
      TargetTrackingScalingPolicyConfiguration:
        TargetValue: 70.0
        ScaleInCooldown: 180
        ScaleOutCooldown: 60
        PredefinedMetricSpecification:
          PredefinedMetricType: ECSServiceAverageCPUUtilization
  ServiceScalingPolicyMem:
    Type: AWS::ApplicationAutoScaling::ScalingPolicy
    Properties:
      PolicyName: !Sub ${AWS::StackName}-target-tracking-mem90
      PolicyType: TargetTrackingScaling
      ScalingTargetId: !Ref ECSScalableTarget
      TargetTrackingScalingPolicyConfiguration:
        TargetValue: 90.0
        ScaleInCooldown: 180
        ScaleOutCooldown: 60
        PredefinedMetricSpecification:
          PredefinedMetricType: ECSServiceAverageMemoryUtilization

Create a scaling policy for an Amazon ECS service (metric: average request count per target)

The following example applies a target tracking scaling policy with the ALBRequestCountPerTarget predefined metric to an ECS service. The policy is used to add capacity to the ECS service when the request count per target (per minute) exceeds the target value. Because the value of DisableScaleIn is set to true, the target tracking policy won't remove capacity from the scalable target.

It uses the Fn::Join and Fn::GetAtt intrinsic functions to construct the ResourceLabel property with the logical names of the AWS::ElasticLoadBalancingV2::LoadBalancer (myLoadBalancer) and AWS::ElasticLoadBalancingV2::TargetGroup (myTargetGroup) resources that are specified in the same template.

The MaxCapacity and MinCapacity properties of the scalable target and the TargetValue property of the scaling policy reference parameter values that you pass to the template when creating or updating a stack.

JSON

{
  "Resources" : {
    "ECSScalableTarget" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalableTarget",
      "Properties" : {
        "MaxCapacity" : { "Ref" : "MaxCount" },
        "MinCapacity" : { "Ref" : "MinCount" },
        "RoleARN" : { "Fn::Sub" : "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/ecs.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_ECSService" },
        "ServiceNamespace" : "ecs",
        "ScalableDimension" : "ecs:service:DesiredCount",
        "ResourceId" : {
          "Fn::Join" : [
            "/",
            [
              "service",
              {
                "Ref" : "myContainerCluster"
              },
              {
                "Fn::GetAtt" : [
                  "myService",
                  "Name"
                ]
              }
            ]
          ]
        }
      }
    },
    "ServiceScalingPolicyALB" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalingPolicy",
      "Properties" : {
        "PolicyName" : "alb-requests-per-target-per-minute",
        "PolicyType" : "TargetTrackingScaling",
        "ScalingTargetId" : { "Ref" : "ECSScalableTarget" },
        "TargetTrackingScalingPolicyConfiguration" : {
          "TargetValue" : { "Ref" : "ALBPolicyTargetValue" },
          "ScaleInCooldown" : 180,
          "ScaleOutCooldown" : 30,
          "DisableScaleIn" : true,
          "PredefinedMetricSpecification" : {
            "PredefinedMetricType" : "ALBRequestCountPerTarget",
            "ResourceLabel" : {
              "Fn::Join" : [
                "/",
                [
                  {
                    "Fn::GetAtt" : [
                      "myLoadBalancer",
                      "LoadBalancerFullName"
                    ]
                  },
                  {
                    "Fn::GetAtt" : [
                      "myTargetGroup",
                      "TargetGroupFullName"
                    ]
                  }
                ]
              ]
            }
          }
        }
      }
    }
  }
}

YAML

---
Resources:
  ECSScalableTarget:
    Type: AWS::ApplicationAutoScaling::ScalableTarget
    Properties:
      MaxCapacity: !Ref MaxCount
      MinCapacity: !Ref MinCount  
      RoleARN: 
        Fn::Sub: 'arn:aws:iam::${AWS::AccountId}:role/aws-service-role/ecs.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_ECSService'
      ServiceNamespace: ecs
      ScalableDimension: 'ecs:service:DesiredCount'
      ResourceId: !Join 
        - /
        - - service
          - !Ref myContainerCluster
          - !GetAtt myService.Name
  ServiceScalingPolicyALB:
    Type: AWS::ApplicationAutoScaling::ScalingPolicy
    Properties:
      PolicyName: alb-requests-per-target-per-minute
      PolicyType: TargetTrackingScaling
      ScalingTargetId: !Ref ECSScalableTarget
      TargetTrackingScalingPolicyConfiguration:
        TargetValue: !Ref ALBPolicyTargetValue
        ScaleInCooldown: 180
        ScaleOutCooldown: 30
        DisableScaleIn: true
        PredefinedMetricSpecification:
          PredefinedMetricType: ALBRequestCountPerTarget
          ResourceLabel: !Join 
            - '/' 
            - - !GetAtt myLoadBalancer.LoadBalancerFullName
              - !GetAtt myTargetGroup.TargetGroupFullName

Create a scheduled action with a cron expression for a Lambda function

This snippet registers the provisioned concurrency for a function alias (AWS::Lambda::Alias) named BLUE using the AWS::ApplicationAutoScaling::ScalableTarget resource. It also creates a scheduled action with a recurring schedule using a cron expression. The time zone for the recurring schedule is UTC.

It uses the Fn::Join and Ref intrinsic functions in the RoleARN property to specify the ARN of the service-linked role. It uses the Fn::Sub intrinsic function to construct the ResourceId property with the logical name of the AWS::Lambda::Function or AWS::Serverless::Function resource that is specified in the same template.

Note

You can't allocate provisioned concurrency on an alias that points to the unpublished version ($LATEST).

For more information about how to create an AWS CloudFormation template for Lambda resources, see the blog post Scheduling AWS Lambda Provisioned Concurrency for recurring peak usage on the AWS Compute Blog.

JSON

{
  "ScalableTarget" : {
    "Type" : "AWS::ApplicationAutoScaling::ScalableTarget",
    "Properties" : {
      "MaxCapacity" : 250,
      "MinCapacity" : 0,
      "RoleARN" : {
        "Fn::Join" : [
          ":",
          [
            "arn:aws:iam:",
            {
              "Ref" : "AWS::AccountId"
            },
            "role/aws-service-role/lambda.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_LambdaConcurrency"
          ]
        ]
      },
      "ServiceNamespace" : "lambda",
      "ScalableDimension" : "lambda:function:ProvisionedConcurrency",
      "ResourceId" : { "Fn::Sub" : "function:${logicalName}:BLUE" },
      "ScheduledActions" : [
        {
          "ScalableTargetAction" : {
            "MinCapacity" : "250"
          },
          "ScheduledActionName" : "my-scale-out-scheduled-action",
          "Schedule" : "cron(0 18 * * ? *)",
          "EndTime" : "2022-12-31T12:00:00.000Z"
        }
      ]
    }
  }
}

YAML

ScalableTarget:
  Type: AWS::ApplicationAutoScaling::ScalableTarget
  Properties:
    MaxCapacity: 250
    MinCapacity: 0
    RoleARN: !Join 
      - ':'
      - - 'arn:aws:iam:'
        - !Ref 'AWS::AccountId'
        - role/aws-service-role/lambda.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_LambdaConcurrency
    ServiceNamespace: lambda
    ScalableDimension: lambda:function:ProvisionedConcurrency
    ResourceId: !Sub function:${logicalName}:BLUE
    ScheduledActions:
      - ScalableTargetAction:
          MinCapacity: 250
        ScheduledActionName: my-scale-out-scheduled-action
        Schedule: 'cron(0 18 * * ? *)'
        EndTime: '2022-12-31T12:00:00.000Z'

Create a scheduled action with an at expression for a Spot Fleet

This snippet shows how to create two scheduled actions that occur only once for an AWS::EC2::SpotFleet resource using the AWS::ApplicationAutoScaling::ScalableTarget resource. The time zone for each one-time scheduled action is UTC.

It uses the Fn::Join and Ref intrinsic functions to construct the ResourceId property with the logical name of the AWS::EC2::SpotFleet resource that is specified in the same template.

Note

The Spot Fleet request must have a request type of maintain. Automatic scaling isn't supported for one-time requests or Spot blocks.

JSON

{
  "Resources" : {
    "SpotFleetScalableTarget" : {
      "Type" : "AWS::ApplicationAutoScaling::ScalableTarget",
      "Properties" : {
        "MaxCapacity" : 0,
        "MinCapacity" : 0,
        "RoleARN" : { "Fn::Sub" : "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/ec2.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_EC2SpotFleetRequest" },
        "ServiceNamespace" : "ec2",
        "ScalableDimension" : "ec2:spot-fleet-request:TargetCapacity",
        "ResourceId" : {
          "Fn::Join" : [
            "/",
            [
              "spot-fleet-request",
              {
                "Ref" : "logicalName"
              }
            ]
          ]
        },
        "ScheduledActions" : [
          {
            "ScalableTargetAction" : {
              "MaxCapacity" : "10",
              "MinCapacity" : "10"
            },
            "ScheduledActionName" : "my-scale-out-scheduled-action",
            "Schedule" : "at(2022-05-20T13:00:00)"
          },
          {
            "ScalableTargetAction" : {
              "MaxCapacity" : "0",
              "MinCapacity" : "0"
            },
            "ScheduledActionName" : "my-scale-in-scheduled-action",
            "Schedule" : "at(2022-05-20T21:00:00)"
          }
        ]
      }
    }
  }
}

YAML

---
Resources:
  SpotFleetScalableTarget:
    Type: AWS::ApplicationAutoScaling::ScalableTarget
    Properties:
      MaxCapacity: 0
      MinCapacity: 0
      RoleARN: 
        Fn::Sub: 'arn:aws:iam::${AWS::AccountId}:role/aws-service-role/ec2.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_EC2SpotFleetRequest'
      ServiceNamespace: ec2
      ScalableDimension: 'ec2:spot-fleet-request:TargetCapacity'
      ResourceId: !Join 
        - /
        - - spot-fleet-request
          - !Ref logicalName
      ScheduledActions:
        - ScalableTargetAction:
            MaxCapacity: 10
            MinCapacity: 10
          ScheduledActionName: my-scale-out-scheduled-action
          Schedule: 'at(2022-05-20T13:00:00)'
        - ScalableTargetAction:
            MaxCapacity: 0
            MinCapacity: 0
          ScheduledActionName: my-scale-in-scheduled-action
          Schedule: 'at(2022-05-20T21:00:00)'