ALIYUN::ESS::ScalingGroup - Resource Orchestration Service

ALIYUN::ESS::ScalingGroup is used to create a scaling group. A scaling group is a group of Elastic Compute Service (ECS) instances that are dynamically scaled based on the configured scenario. A scaling group does not immediately take effect after it is created. You must use ALIYUN::ESS::ScalingGroupEnable to enable the scaling group to trigger scaling activities and execute scaling rules.

Syntax

{
  "Type": "ALIYUN::ESS::ScalingGroup",
  "Properties": {
    "MultiAZPolicy": String,
    "DesiredCapacity": Integer,
    "NotificationConfigurations": List,
    "ProtectedInstances": List,
    "LaunchTemplateId": String,
    "LaunchTemplateVersion": String,
    "ScalingGroupName": String,
    "VSwitchIds": List,
    "DefaultCooldown": Integer,
    "MinSize": Integer,
    "GroupDeletionProtection": Boolean,
    "MaxSize": Integer,
    "InstanceId": String,
    "VSwitchId": String,
    "LoadBalancerIds": List,
    "StandbyInstances": List,
    "RemovalPolicys": List,
    "HealthCheckType": String,
    "DBInstanceIds": List,
    "Tags": List,
    "OnDemandPercentageAboveBaseCapacity": Integer,
    "CompensateWithOnDemand": Boolean,
    "ContainerGroupId": String,
    "ScalingPolicy": String,
    "SpotInstanceRemedy": Boolean,
    "SpotInstancePools": Integer,
    "OnDemandBaseCapacity": Integer,
    "GroupType": String
  }
}

Properties


Property	Type	Required	Editable	Description	Constraint
MinSize	Integer	Yes	Yes	The minimum number of ECS instances in the scaling group.	Valid values: 0 to 1000. When the number of ECS instances in the scaling group is less than the value of the MinSize property, Auto Scaling automatically creates ECS instances until the number of instances is equal to the value of this property.
MaxSize	Integer	Yes	Yes	The maximum number of ECS instances in the scaling group.	Valid values: 0 to 1000. When the number of ECS instances in the scaling group is greater than the value of the MaxSize property, Auto Scaling automatically removes ECS instances from the scaling group until the number of instances is equal to the value of this property.
ScalingGroupName	String	No	Yes	The display name of the scaling group.	The name must be 2 to 64 characters in length and can contain letters, digits, underscores (_), hyphens (-), and periods (.). The name must start with a letter or digit. The name must be unique to an Alibaba Cloud account within a region. Default value: ScalingGroupId.
LaunchTemplateId	String	No	Yes	The ID of the launch template that is used by Auto Scaling to create instances.	None.
LaunchTemplateVersion	String	No	Yes	The version of the instance launch template.	Valid values: A fixed template version number. Default: the default template version. Latest: the latest template version.
RemovalPolicys	List	No	Yes	The policies that are used to remove ECS instances from the scaling group.	Valid values: OldestInstance: removes the ECS instance that is added to the scaling group at the earliest point in time. This is a default policy. NewestInstance: removes ECS instances that are most recently added to the scaling group. OldestScalingConfiguration: removes the ECS instance that is created based on the earliest scaling configuration. This is also a default policy.
VSwitchId	String	No	No	The ID of the vSwitch.	None.
LoadBalancerIds	List	No	Yes	The ID of the Server Load Balancer (SLB) instance.	This value can be a JSON array that consists of up to five SLB instance IDs. Separate multiple IDs with commas (,).
DefaultCooldown	Integer	No	Yes	The cooldown time after a scaling activity in which ECS instances are added to or removed from the scaling group.	Valid values: 0 to 86400. Unit: seconds. Default value: 300. During the cooldown time, Auto Scaling executes only scaling activities that are triggered by CloudMonitor event-triggered tasks.
DBInstanceIds	List	No	Yes	The IDs of ApsaraDB RDS instances.	This value can be a JSON array that contains up to eight ApsaraDB RDS instance IDs. Separate multiple IDs with commas (,).
VSwitchIds	List	No	No	The IDs of vSwitches.	You can specify up to five vSwitch IDs. If you set this property, the VSwitchId property is ignored. vSwitches are sorted in descending order of priority. If Auto Scaling fails to create ECS instances in the zone of the vSwitch with the highest priority, Auto Scaling attempts to create ECS instances in the zone of the vSwitch with a lower priority.
MultiAZPolicy	String	No	No	The ECS instance scaling policy for a multi-zone scaling group.	Valid values: PRIORITY: scales ECS instances based on the specified vSwitch. If Auto Scaling fails to create ECS instances in the zone of the vSwitch with the highest priority, Auto Scaling attempts to create ECS instances in the zone of the vSwitch with a lower priority. BALANCE: evenly distributes ECS instances across zones that are specified in the scaling group. COST_OPTIMIZED: creates ECS instances based on the unit prices of the vCPUs in ascending order. Preemptible instances are created first when preemptible instance types are specified for the scaling configuration. Pay-as-you-go instances are created if no preemptible instances are available due to issues such as insufficient ECS resources.
NotificationConfigurations	List	No	Yes	The notification configurations for event and resource changes.	For more information, see NotificationConfigurations properties
ProtectedInstances	List	No	Yes	The number of protected ECS instances in the scaling group.	Maximum value: 1000.
StandbyInstances	List	No	Yes	The number of ECS instances that are in the standby state in the scaling group.	Maximum value: 1000.
HealthCheckType	String	No	Yes	The type of health check.	Valid values: ECS NONE
GroupDeletionProtection	Boolean	No	Yes	Specifies whether to enable deletion protection for the scaling group.	Valid values: true: Deletion protection is enabled for the scaling group. The scaling group cannot be deleted. false: Deletion protection is disabled for the scaling group. This is the default value.
DesiredCapacity	Integer	No	Yes	The expected number of ECS instances in the scaling group. Auto Scaling automatically maintains the specified number of ECS instances.	The expected number must be greater than or equal to the value of MinSize and less than or equal to the value of MaxSize.
InstanceId	String	No	No	The ID of the ECS instance from which Auto Scaling obtains configuration information and uses this information to create a scaling configuration.	None.
Tags	List	No	Yes	The tags of the scaling group.	You can specify up to 20 tags. For more information, see Tags properties
OnDemandPercentageAboveBaseCapacity	Integer	No	Yes	The percentage of pay-as-you-go instances among the excess instances that exceed the number specified by the OnDemandBaseCapacity property.	Valid values: 0 to 100.
CompensateWithOnDemand	Boolean	No	Yes	Specifies whether to automatically create pay-as-you-go instances to reach the expected number of ECS instances.	You can set this parameter to specify whether pay-as-you-go instances can be automatically created to reach the expected number of ECS instances when the expected number of preemptible instances is not reached. The expected number of preemptible instances may not be reached due to reasons such as high costs and insufficient resources. This property is valid only if the MultiAZPolicy property is set to COST_OPTIMIZED. Valid values: true: yes. This is the default value. false: no.
ContainerGroupId	String	No	No	The ID of the elastic container instance.	None.
ScalingPolicy	String	No	No	The reclaim mode of the scaling group.	Valid values: recycle: If a scale-in is performed, instances that are no longer used are stopped. release: If a scale-in is performed, instances that are no longer used are released. This property specifies the reclaim modes of scaling groups, but the policy that is used to remove ECS instances from scaling groups is determined by the RemovePolicy property of the RemoveInstances operation. For more information, see RemoveInstances
SpotInstanceRemedy	Boolean	No	Yes	Specifies whether to supplement preemptible instances.	Valid values: true: supplements preemptible instances. If you set the value to true, Auto Scaling attempts to create a new preemptible instance if an existing preemptible instance is to be reclaimed. false: does not supplement preemptible instances.
SpotInstancePools	Integer	No	Yes	Specifies the number of instances of specific types.	Auto Scaling evenly creates preemptible instances based on multiple types of instances that have the lowest costs. Valid values: 1 to 10.
OnDemandBaseCapacity	Integer	No	Yes	The minimum number of pay-as-you-go instances that must be contained in the scaling group.	Valid values: 0 to 1000. If the number of pay-as-you-go instances is less than the value of this property, pay-as-you-go instances are preferentially created.
GroupType	String	No	No	The type of instances that are managed by the scaling group.	Valid values: ECS: the ECS instances. This is the default value. ECI: the elastic container instances.

NotificationConfigurations syntax

"NotificationConfigurations": [
  {
    "NotificationArn": String,
    "NotificationTypes": List
  }
]

NotificationConfigurations properties


Property	Type	Required	Editable	Description	Constraint
NotificationArn	String	Yes	No	The Alibaba Cloud Resource Name (ARN) of the notification object that Auto Scaling uses to notify you when an instance is in the transition state for the lifecycle hook. This object can be a Message Service (MNS) queue or an MNS topic.	Format: MNS queue: `acs:ess:{region}:{account-id}:queue/{queuename}` MNS topic: `acs:ess:{region}:{account-id}:topic/{topicname}`
NotificationTypes	List	Yes	No	The types of notification configurations for ESS events and resource changes.	None.

Tags syntax

"Tags": [
  {
    "Key": String,
    "Value": String
  }
]

Tags properties


Property	Type	Required	Editable	Description	Constraint
Key	String	Yes	No	The tag key.	The tag key must be 1 to 128 characters in length and cannot contain `http://` or `https://`. The tag key cannot start with `acs:` or `aliyun`.
Value	String	No	No	The tag value.	The tag value must be 0 to 128 characters in length and cannot contain `http://` or `https://`. The tag value cannot start with `acs:` or `aliyun`.

Return values

Fn::GetAtt

ScalingGroupId: the ID of the scaling group.
ScalingGroupName: the name of the scaling group.

Examples

YAML format

ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  DBInstanceIds:
    Description: 'ID list of an RDS instance. A Json Array with format: [ "rm-id0",
      "rm-id1", ... "rm-idz" ], support up to 100 RDS instance.'
    MaxLength: 100
    Type: CommaDelimitedList
  DefaultCooldown:
    Description: 'Default cool-down time (in seconds) of the scaling group. Value
      range: [0, 86400].

      The default value is 300s.'
    MaxValue: 86400
    MinValue: 0
    Type: Number
  DesiredCapacity:
    Description: The expected number of ECS instances in a scaling group. The scaling
      group automatically keeps the number of ECS instances as expected. The number
      of ECS instances cannot be greater than the value of MaxSize and cannot be less
      than the value of MinSize.
    Type: Number
  GroupDeletionProtection:
    AllowedValues:
    - 'True'
    - 'true'
    - 'False'
    - 'false'
    Default: false
    Description: 'Whether to enable deletion protection for scaling group.

      Default to False.'
    Type: Boolean
  HealthCheckType:
    AllowedValues:
    - ECS
    - NONE
    Description: The health check type. Allow values is "ECS" and "NONE", default
      to "ECS".
    Type: String
  InstanceId:
    Description: The ID of the ECS instance from which the scaling group obtains configuration
      information of the specified instance.
    Type: String
  LaunchTemplateId:
    Description: The ID of the instance launch template from which the scaling group
      obtains launch configurations.
    Type: String
  LaunchTemplateVersion:
    Description: 'The version of the instance launch template. Valid values:

      A fixed template version numbe.

      Default: The default template version is always used.

      Latest: The latest template version is always used.'
    Type: String
  LoadBalancerIds:
    Description: 'ID list of a Server Load Balancer instance. A Json Array with format:
      [ "lb-id0", "lb-id1", ... "lb-idz" ], support up to 100 Load Balancer instance.'
    MaxLength: 100
    Type: CommaDelimitedList
  MaxSize:
    Description: 'Maximum number of ECS instances in the scaling group. Value range:
      [0, 1000].'
    MaxValue: 1000
    MinValue: 0
    Type: Number
  MinSize:
    Description: 'Minimum number of ECS instances in the scaling group. Value range:
      [0, 1000].'
    MaxValue: 1000
    MinValue: 0
    Type: Number
  MultiAZPolicy:
    AllowedValues:
    - PRIORITY
    - BALANCE
    Description: 'ECS scaling strategy for multi availability zone. Allow value:

      1. PRIORITY: scaling the capacity according to the virtual switch (VSwitchIds.N)
      you define. ECS instances are automatically created using the next priority
      virtual switch when the higher priority virtual switch cannot be created in
      the available zone.

      2. BALANCE: evenly allocate ECS instances between the multiple available zone
      specified by the scaling group.'
    Type: String
  NotificationConfigurations:
    Description: When a scaling event occurs in a scaling group, ESS will send a notification
      to Cloud Monitor or MNS.
    Type: Json
  ProtectedInstances:
    Description: ECS instances of protected mode in the scaling group.
    MaxLength: 1000
    Type: CommaDelimitedList
  RemovalPolicys:
    AllowedValues:
    - OldestScalingConfiguration
    - OldestInstance
    - NewestInstance
    Description: 'Policy for removing ECS instances from the scaling group.

      Optional values:

      OldestInstance: removes the first ECS instance attached to the scaling group.

      NewestInstance: removes the first ECS instance attached to the scaling group.

      OldestScalingConfiguration: removes the ECS instance with the oldest scaling
      configuration.

      Default values: OldestScalingConfiguration and OldestInstance. You can enter
      up to two removal policies.'
    MaxLength: 2
    Type: CommaDelimitedList
  ScalingGroupName:
    AllowedPattern: ^[a-zA-Z0-9\u4e00-\u9fa5][-_.a-zA-Z0-9\u4e00-\u9fa5]{1,63}$
    Description: 'Name shown for the scaling group, which must contain 2-40 characters
      (English or Chinese). The name must begin with a number, an upper/lower-case
      letter or a Chinese character and may contain numbers, "_", "-" or ".". The
      account name is unique in the same region.

      If this parameter is not specified, the default value is ScalingGroupId.'
    Type: String
  StandbyInstances:
    Description: ECS instances of standby mode in the scaling group.
    MaxLength: 1000
    Type: CommaDelimitedList
  Tags:
    Description: Tags to attach to instance. Max support 20 tags to add during create
      instance. Each tag with two properties Key and Value, and Key is required.
    MaxLength: 20
    Type: Json
  VSwitchId:
    Description: If you create a VPC scaling group, you must specify the ID of a VSwitch.
    Type: String
  VSwitchIds:
    Description: 'Parameter VSwitchIds.N is used to create instance in multiple zones.
      Parameter VSwitchIds.N has a priority over parameter VSwitchId.

      The valid range of N is [1, 5], and you can specify at most 5 VSwitches in a
      VPC.

      The priority of VSwitches descends from 1 to 5, and 1 indicates the highest
      priority.

      When you fail to create an instance in the zone to which a specified VSwitch
      belongs, another VSwitch with less priority replaces the specified one automatically.'
    MaxLength: 5
    MinLength: 0
    Type: CommaDelimitedList
Resources:
  ScalingGroup:
    Properties:
      DBInstanceIds:
        Ref: DBInstanceIds
      DefaultCooldown:
        Ref: DefaultCooldown
      DesiredCapacity:
        Ref: DesiredCapacity
      GroupDeletionProtection:
        Ref: GroupDeletionProtection
      HealthCheckType:
        Ref: HealthCheckType
      InstanceId:
        Ref: InstanceId
      LaunchTemplateId:
        Ref: LaunchTemplateId
      LaunchTemplateVersion:
        Ref: LaunchTemplateVersion
      LoadBalancerIds:
        Ref: LoadBalancerIds
      MaxSize:
        Ref: MaxSize
      MinSize:
        Ref: MinSize
      MultiAZPolicy:
        Ref: MultiAZPolicy
      NotificationConfigurations:
        Ref: NotificationConfigurations
      ProtectedInstances:
        Ref: ProtectedInstances
      RemovalPolicys:
        Ref: RemovalPolicys
      ScalingGroupName:
        Ref: ScalingGroupName
      StandbyInstances:
        Ref: StandbyInstances
      Tags:
        Ref: Tags
      VSwitchId:
        Ref: VSwitchId
      VSwitchIds:
        Ref: VSwitchIds
    Type: ALIYUN::ESS::ScalingGroup
Outputs:
  ScalingGroupId:
    Description: Scaling group Id
    Value:
      Fn::GetAtt:
      - ScalingGroup
      - ScalingGroupId
  ScalingGroupName:
    Description: Scaling group name
    Value:
      Fn::GetAtt:
      - ScalingGroup
      - ScalingGroupName

JSON format

{
  "ROSTemplateFormatVersion": "2015-09-01",
  "Parameters": {
    "InstanceId": {
      "Type": "String",
      "Description": "The ID of the ECS instance from which the scaling group obtains configuration information of the specified instance."
    },
    "VSwitchIds": {
      "Type": "CommaDelimitedList",
      "Description": "Parameter VSwitchIds.N is used to create instance in multiple zones. Parameter VSwitchIds.N has a priority over parameter VSwitchId.\nThe valid range of N is [1, 5], and you can specify at most 5 VSwitches in a VPC.\nThe priority of VSwitches descends from 1 to 5, and 1 indicates the highest priority.\nWhen you fail to create an instance in the zone to which a specified VSwitch belongs, another VSwitch with less priority replaces the specified one automatically.",
      "MinLength": 0,
      "MaxLength": 5
    },
    "NotificationConfigurations": {
      "Type": "Json",
      "Description": "When a scaling event occurs in a scaling group, ESS will send a notification to Cloud Monitor or MNS."
    },
    "VSwitchId": {
      "Type": "String",
      "Description": "If you create a VPC scaling group, you must specify the ID of a VSwitch."
    },
    "LoadBalancerIds": {
      "Type": "CommaDelimitedList",
      "Description": "ID list of a Server Load Balancer instance. A Json Array with format: [ \"lb-id0\", \"lb-id1\", ... \"lb-idz\" ], support up to 100 Load Balancer instance.",
      "MaxLength": 100
    },
    "DesiredCapacity": {
      "Type": "Number",
      "Description": "The expected number of ECS instances in a scaling group. The scaling group automatically keeps the number of ECS instances as expected. The number of ECS instances cannot be greater than the value of MaxSize and cannot be less than the value of MinSize."
    },
    "GroupDeletionProtection": {
      "Type": "Boolean",
      "Description": "Whether to enable deletion protection for scaling group.\nDefault to False.",
      "AllowedValues": [
        "True",
        "true",
        "False",
        "false"
      ],
      "Default": false
    },
    "LaunchTemplateId": {
      "Type": "String",
      "Description": "The ID of the instance launch template from which the scaling group obtains launch configurations."
    },
    "MaxSize": {
      "Type": "Number",
      "Description": "Maximum number of ECS instances in the scaling group. Value range: [0, 1000].",
      "MinValue": 0,
      "MaxValue": 1000
    },
    "ScalingGroupName": {
      "Type": "String",
      "Description": "Name shown for the scaling group, which must contain 2-40 characters (English or Chinese). The name must begin with a number, an upper/lower-case letter or a Chinese character and may contain numbers, \"_\", \"-\" or \".\". The account name is unique in the same region.\nIf this parameter is not specified, the default value is ScalingGroupId.",
      "AllowedPattern": "^[a-zA-Z0-9\\u4e00-\\u9fa5][-_.a-zA-Z0-9\\u4e00-\\u9fa5]{1,63}$"
    },
    "MinSize": {
      "Type": "Number",
      "Description": "Minimum number of ECS instances in the scaling group. Value range: [0, 1000].",
      "MinValue": 0,
      "MaxValue": 1000
    },
    "DefaultCooldown": {
      "Type": "Number",
      "Description": "Default cool-down time (in seconds) of the scaling group. Value range: [0, 86400].\nThe default value is 300s.",
      "MinValue": 0,
      "MaxValue": 86400
    },
    "StandbyInstances": {
      "Type": "CommaDelimitedList",
      "Description": "ECS instances of standby mode in the scaling group.",
      "MaxLength": 1000
    },
    "LaunchTemplateVersion": {
      "Type": "String",
      "Description": "The version of the instance launch template. Valid values:\nA fixed template version numbe.\nDefault: The default template version is always used.\nLatest: The latest template version is always used."
    },
    "MultiAZPolicy": {
      "Type": "String",
      "Description": "ECS scaling strategy for multi availability zone. Allow value:\n1. PRIORITY: scaling the capacity according to the virtual switch (VSwitchIds.N) you define. ECS instances are automatically created using the next priority virtual switch when the higher priority virtual switch cannot be created in the available zone.\n2. BALANCE: evenly allocate ECS instances between the multiple available zone specified by the scaling group.",
      "AllowedValues": [
        "PRIORITY",
        "BALANCE"
      ]
    },
    "RemovalPolicys": {
      "Type": "CommaDelimitedList",
      "AllowedValues": [
        "OldestScalingConfiguration",
        "OldestInstance",
        "NewestInstance"
      ],
      "Description": "Policy for removing ECS instances from the scaling group.\nOptional values:\nOldestInstance: removes the first ECS instance attached to the scaling group.\nNewestInstance: removes the first ECS instance attached to the scaling group.\nOldestScalingConfiguration: removes the ECS instance with the oldest scaling configuration.\nDefault values: OldestScalingConfiguration and OldestInstance. You can enter up to two removal policies.",
      "MaxLength": 2
    },
    "ProtectedInstances": {
      "Type": "CommaDelimitedList",
      "Description": "ECS instances of protected mode in the scaling group.",
      "MaxLength": 1000
    },
    "DBInstanceIds": {
      "Type": "CommaDelimitedList",
      "Description": "ID list of an RDS instance. A Json Array with format: [ \"rm-id0\", \"rm-id1\", ... \"rm-idz\" ], support up to 100 RDS instance.",
      "MaxLength": 100
    },
    "Tags": {
      "Type": "Json",
      "Description": "Tags to attach to instance. Max support 20 tags to add during create instance. Each tag with two properties Key and Value, and Key is required.",
      "MaxLength": 20
    },
    "HealthCheckType": {
      "Type": "String",
      "Description": "The health check type. Allow values is \"ECS\" and \"NONE\", default to \"ECS\".",
      "AllowedValues": [
        "ECS",
        "NONE"
      ]
    }
  },
  "Resources": {
    "ScalingGroup": {
      "Type": "ALIYUN::ESS::ScalingGroup",
      "Properties": {
        "InstanceId": {
          "Ref": "InstanceId"
        },
        "VSwitchIds": {
          "Ref": "VSwitchIds"
        },
        "NotificationConfigurations": {
          "Ref": "NotificationConfigurations"
        },
        "VSwitchId": {
          "Ref": "VSwitchId"
        },
        "LoadBalancerIds": {
          "Ref": "LoadBalancerIds"
        },
        "DesiredCapacity": {
          "Ref": "DesiredCapacity"
        },
        "GroupDeletionProtection": {
          "Ref": "GroupDeletionProtection"
        },
        "LaunchTemplateId": {
          "Ref": "LaunchTemplateId"
        },
        "MaxSize": {
          "Ref": "MaxSize"
        },
        "ScalingGroupName": {
          "Ref": "ScalingGroupName"
        },
        "MinSize": {
          "Ref": "MinSize"
        },
        "DefaultCooldown": {
          "Ref": "DefaultCooldown"
        },
        "StandbyInstances": {
          "Ref": "StandbyInstances"
        },
        "LaunchTemplateVersion": {
          "Ref": "LaunchTemplateVersion"
        },
        "MultiAZPolicy": {
          "Ref": "MultiAZPolicy"
        },
        "RemovalPolicys": {
          "Ref": "RemovalPolicys"
        },
        "ProtectedInstances": {
          "Ref": "ProtectedInstances"
        },
        "DBInstanceIds": {
          "Ref": "DBInstanceIds"
        },
        "Tags": {
          "Ref": "Tags"
        },
        "HealthCheckType": {
          "Ref": "HealthCheckType"
        }
      }
    }
  },
  "Outputs": {
    "ScalingGroupId": {
      "Description": "Scaling group Id",
      "Value": {
        "Fn::GetAtt": [
          "ScalingGroup",
          "ScalingGroupId"
        ]
      }
    },
    "ScalingGroupName": {
      "Description": "Scaling group name",
      "Value": {
        "Fn::GetAtt": [
          "ScalingGroup",
          "ScalingGroupName"
        ]
      }
    }
  }
}

If you want to define only one scaling configuration that has a dependency for a scaling group, you must use the DependsOn property for the scaling group when you configure the Resources section of a template. The DependsOn property is used to associate the scaling configuration with the dependency in the template.

In this example, the DependsOn property in ScalingGroup is set to SecurityGroup because SecurityGroup is the dependency of ScalingConfiguration.

ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  VpcId:
    AssociationProperty: ALIYUN::ECS::VPC::VPCId
    Type: String
  VSwitchId:
    AssociationProperty: ALIYUN::ECS::VSwitch::VSwitchId
    Type: String
    AssociationPropertyMetadata:
      VpcId: VpcId
  SystemDiskCategory:
    Type: String
    Default: cloud_essd
  InstanceType:
    Type: String
    Default: ecs.g6e.large
  ImageId:
    Type: String
    Default: centos_7_04_64_20G_alibase_201701015.vhd
Resources:
  ScalingGroupEnable:
    Type: ALIYUN::ESS::ScalingGroupEnable
    Properties:
      ScalingConfigurationId:
        Ref: ScalingConfiguration
      ScalingGroupId:
        Ref: ScalingGroup
      ScalingRuleArisExecuteVersion: 0
  SecurityGroup:
    Type: ALIYUN::ECS::SecurityGroup
    Properties:
      SecurityGroupName:
        Ref: ALIYUN::StackName
      VpcId:
        Ref: VpcId
      SecurityGroupIngress:
        - PortRange: '-1/-1'
          Priority: 1
          SourceCidrIp: 0.0.X.X/0
          IpProtocol: all
          NicType: internet
      SecurityGroupEgress:
        - PortRange: '-1/-1'
          Priority: 1
          IpProtocol: all
          DestCidrIp: 0.0.X.X/0
          NicType: internet
        - PortRange: '-1/-1'
          Priority: 1
          IpProtocol: all
          DestCidrIp: 0.0.X.X/0
          NicType: intranet
  ScalingConfiguration:
    Type: ALIYUN::ESS::ScalingConfiguration
    DependsOn: ScalingGroup
    Properties:
      InstanceType:
        Ref: InstanceType
      ImageId:
        Ref: ImageId
      SystemDiskCategory:
        Ref: SystemDiskCategory
      SystemDiskSize: 100
      ScalingConfigurationName:
        Ref: ALIYUN::StackName
      ScalingGroupId:
        Ref: ScalingGroup
      SecurityGroupId:
        Ref: SecurityGroup
  ScalingGroup:
    Type: ALIYUN::ESS::ScalingGroup
    DependsOn: SecurityGroup
    Properties:
      MaxSize: 3
      MinSize: 0
      DefaultCooldown: 15
      VpcId:
        Ref: VpcId
      VSwitchId:
        Ref: VSwitchId
Outputs: {}

For more examples, visit ScalingGroup.json and ScalingGroup.yml. In the examples, the following resource types are used: ALIYUN::ESS::ScalingGroup, ALIYUN::ESS::ScalingRule, ALIYUN::ESS::AlarmTask, ALIYUN::ESS::AlarmTaskEnable, ALIYUN::ESS::LifecycleHook, and ALIYUN::ESS::ScheduledTask.