Auto Scaling：CreateScalingConfiguration

Action

String

Yes

CreateScalingConfiguration

A required parameter. Set the value to CreateScalingConfiguration.

ScalingGroupId

String

Yes

asg-bp14wlu85wrpchm0****

The ID of the scaling group to which the scaling configuration belongs.

ImageId

String

No

centos6u5_64_20G_aliaegis****.vhd

The ID of the image file used to automatically create instances.

ImageName

String

No

image****

The name of the image file. Image names must be unique within a region. You cannot use this parameter to specify images from Alibaba Cloud Marketplace.

InstanceType

String

No

ecs.g6.large

An ECS instance type. For more information, see Instance families.

Cpu

Integer

No

2

The number of vCPUs. Unit: cores.

Specifying both Cpu and Memory defines a range of instance types. For example, Cpu=2 and Memory=16 defines all instance types with 2 vCPUs and 16 GiB of memory. Auto Scaling determines the set of available instance types based on factors such as I/O optimization and zones, then creates the instance with the lowest price.

Memory

Integer

No

16

The memory size. Unit: GiB.

Specifying both Cpu and Memory defines a range of instance types. For example, Cpu=2 and Memory=16 defines all instance types with 2 vCPUs and 16 GiB of memory. Auto Scaling determines the set of available instance types based on factors such as I/O optimization and zones, then creates the instance with the lowest price.

DeploymentSetId

String

No

ds-bp1frxuzdg87zh4pz****

The ID of the deployment set to which the ECS instance belongs.

SecurityGroupId

String

No

sg-280ih****

The ID of the security group to which the ECS instance belongs. ECS instances in the same security group can access each other.

IoOptimized

String

No

optimized

Specifies whether the instance is I/O optimized. Valid values:

• none: The instance is not I/O optimized.

• optimized: The instance is I/O optimized.

The default value for instances of retired instance types is none. For other instance types, the default value is optimized.

InternetChargeType

String

No

PayByTraffic

The billing method for network usage. Valid values:

• PayByBandwidth: pay-by-bandwidth. In this mode, InternetMaxBandwidthOut is the selected fixed bandwidth.

• PayByTraffic: pay-by-data-transfer. In this mode, InternetMaxBandwidthOut is only a bandwidth cap. Billing is based on actual network traffic.

If you do not specify this parameter, the default value is PayByBandwidth for classic network instances and PayByTraffic for VPC instances.

InternetMaxBandwidthIn

Integer

No

10

The maximum inbound public bandwidth. Unit: Mbit/s. Valid values:

• If the purchased outbound public bandwidth is less than or equal to 10 Mbit/s: 1 to 10. Default value: 10.

• If the purchased outbound public bandwidth is greater than 10 Mbit/s: 1 to the value of InternetMaxBandwidthOut. Default value: the value of InternetMaxBandwidthOut.

InternetMaxBandwidthOut

Integer

No

10

The maximum outbound public bandwidth. Unit: Mbit/s. Valid values: 0 to 100.

Default value: 0.

SystemDisk.Category

String

No

cloud_ssd

The category of the system disk. Valid values:

• cloud: basic disk.

• cloud_efficiency: ultra disk.

• cloud_ssd: standard SSD.

• ephemeral_ssd: local SSD.

• cloud_essd: ESSD.

• cloud_auto: ESSD AutoPL disk.

You cannot specify this parameter and SystemDiskCategories.N at the same time. If neither parameter is specified, this parameter has a default value. If the instance type is a Generation I instance type and the instance is not I/O optimized, the default value is cloud. Otherwise, the default value is cloud_efficiency.

SystemDisk.Size

Integer

No

100

The size of the system disk. Unit: GiB. Valid values:

• Basic disk: 20 to 500.

• ESSD:

  • PL0: 1 to 2048.

  • PL1: 20 to 2048.

  • PL2: 461 to 2048.

  • PL3: 1261 to 2048.

• ESSD AutoPL disk: 1 to 2048.

• Other disk types: 20 to 2048.

The value must be greater than or equal to max{1, ImageSize}.

Default value: max{40, ImageSize}.

SystemDisk.DiskName

String

No

cloud_ssdSystem

The name of the system disk. The name must be 2 to 128 characters in length and can contain letters and Chinese characters. It must start with a letter or a Chinese character and cannot start with http:// or https://. It can contain digits, colons (:), underscores (_), and hyphens (-).

SystemDisk.Description

String

No

Test system disk.

The description of the system disk. The description must be 2 to 256 characters in length and can contain letters and Chinese characters. It cannot start with http:// or https://.

SystemDisk.AutoSnapshotPolicyId

String

No

sp-bp12m37ccmxvbmi5****

The ID of the automatic snapshot policy applied to the system disk.

SystemDisk.PerformanceLevel

String

No

PL1

The performance level (PL) of the ESSD system disk. Valid values:

• PL0: An ESSD provides up to 10,000 random read/write IOPS.

• PL1: An ESSD provides up to 50,000 random read/write IOPS.

• PL2: An ESSD provides up to 100,000 random read/write IOPS.

• PL3: An ESSD provides up to 1,000,000 random read/write IOPS.

Default value: PL1.

ScalingConfigurationName

String

No

scalingconfig****

The name of the scaling configuration. The name must be 2 to 64 characters in length and can contain letters, digits, Chinese characters, underscores (_), hyphens (-), and periods (.). It must start with a letter, digit, or Chinese character.

The name must be unique within a scaling group in the same region. If you do not specify this parameter, the scaling configuration ID is used by default.

LoadBalancerWeight

Integer

No

50

The weight of the ECS instance as a backend server for Server Load Balancer. Valid values: 1 to 100.

Default value: 50.

Tags

String

No

{"key1":"value1","key2":"value2", ... "key5":"value5"}

The tags of the ECS instance. Tags are passed as key-value pairs. You can specify up to 20 tags. Requirements for keys and values:

• A key can be up to 64 characters in length. It cannot start with aliyun or acs: and cannot contain http:// or https://. If you use tags, the key cannot be an empty string.

• A value can be up to 128 characters in length. It cannot start with aliyun or acs: and cannot contain http:// or https://. The value can be an empty string.

UserData

String

No

ZWNobyBoZWxsbyBlY3Mh

The user data of the ECS instance. The user data must be Base64-encoded. The raw data before encoding cannot exceed 32 KB.

KeyPairName

String

No

KeyPairTest

The name of the key pair used to log on to the ECS instance.

• For Windows instances, this parameter is ignored and defaults to empty.

• For Linux instances, password-based logon is disabled by default.

RamRoleName

String

No

ramrole****

The name of the RAM role for the ECS instance. RAM role names are provided and maintained by RAM. You can call ListRoles to query available RAM roles. For information about creating a RAM role, see CreateRole.

SecurityEnhancementStrategy

String

No

Active

Specifies whether to enable security hardening. Valid values:

• Active: Enables security hardening. This applies only to public images.

• Deactive: Disables security hardening. This applies to all image types.

InstanceName

String

No

instance****

The name of ECS instances automatically created using this scaling configuration.

HostName

String

No

host****

The hostname of the ECS instance. A period (.) or hyphen (-) cannot be the first or last character, and cannot appear consecutively. Naming requirements vary by instance type:

• Windows instances: The hostname must be 2 to 15 characters in length and can contain letters, digits, and hyphens (-). It cannot contain periods (.) or consist entirely of digits.

• Other instance types (such as Linux): The hostname must be 2 to 64 characters in length and can contain multiple periods (.). Each segment between periods can contain letters, digits, and hyphens (-).

SpotStrategy

String

No

NoSpot

The preemption policy for a pay-as-you-go instance. Valid values:

• NoSpot: A regular pay-as-you-go instance.

• SpotWithPriceLimit: A preemptible instance with a user-defined maximum price.

• SpotAsPriceGo: A preemptible instance where the system automatically bids based on the current market price.

Default value: NoSpot.

PasswordInherit

Boolean

No

false

Specifies whether to use the password preset in the image. If you use this parameter, ensure the image has a password set. Valid values:

• true: Use the preset password of the image.

• false: Do not use the preset password of the image.

Password

String

No

123abc****

The password of the ECS instance. The password must be 8 to 30 characters in length and contain at least three of the following character types: uppercase letters, lowercase letters, digits, and special characters. Special characters include the following:

()` ~!@#$%^&*-_+=\|{}[]:;'<>,.?/

For Windows instances, the password cannot start with a forward slash (/).

ResourceGroupId

String

No

rg-resource****

The ID of the resource group to which the ECS instance belongs.

HpcClusterId

String

No

hpc-clusterid

The ID of the HPC cluster to which the ECS instance belongs.

InstanceDescription

String

No

Test instance.

The description of the ECS instance. The description must be 2 to 256 characters in length and can contain letters and Chinese characters. It cannot start with http:// or https://.

ClientToken

String

No

123e4567-e89b-12d3-a456-42665544****

Ensures request idempotence.

Generate a unique parameter value from your client to ensure uniqueness across different requests. This parameter supports only ASCII characters and cannot exceed 64 characters in length. For more information, see How to ensure idempotence.

Ipv6AddressCount

Integer

No

1

The number of randomly generated IPv6 addresses to assign to the ENI.

CreditSpecification

String

No

Standard

The performance mode of a burstable instance. Valid values:

• Standard: standard mode.

• Unlimited: unlimited mode.

For more information, see the Performance modes section in Overview of burstable instances.

ImageFamily

String

No

hangzhou-daily-update

The name of the image family. Setting this parameter retrieves the latest available image within the current image family to create an instance. If you have already set the ImageId parameter, you cannot set this parameter.

ZoneId

String

No

cn-hangzhou-g

The ID of the zone to which the ECS instance belongs.

DedicatedHostId

String

No

dh-bp67acfmxazb4p****

Specifies whether to create an ECS instance on a Dedicated Host. Because Dedicated Hosts do not support spot instances, if you specify the DedicatedHostId parameter, the SpotStrategy and SpotPriceLimit settings in the request are automatically ignored.

You can call DescribeDedicatedHosts to query the list of Dedicated Host IDs.

Affinity

String

No

default

Specifies whether to associate the Dedicated Host instance with the Dedicated Host. Valid values:

• default: The instance is not associated with the Dedicated Host. If you restart an instance that was stopped in economical mode and the original Dedicated Host has insufficient resources, the instance is placed on another Dedicated Host in the automatic deployment resource pool.

• host: The instance is associated with the Dedicated Host. If you restart an instance that was stopped in economical mode, it remains on the original Dedicated Host. If the original Dedicated Host has insufficient resources, the instance fails to restart.

Default value: default.

Tenancy

String

No

default

Specifies whether to create the instance on a Dedicated Host. Valid values:

• default: Create a non-Dedicated Host instance.

• host: Create a Dedicated Host instance. If you do not specify DedicatedHostId, Alibaba Cloud automatically selects a Dedicated Host to place the instance.

Default value: default.

SchedulerOptions

Map

No

["testManagedPrivateSpaceId****"]

The scheduling options.

PrivatePoolOptions.MatchCriteria

String

No

Open

The private pool capacity option for instance launch. After an elasticity assurance or capacity reservation takes effect, it generates private pool capacity that you can select when launching an instance. Valid values:

• Open: open mode. Automatically matches open private pool capacity. If no eligible private pool capacity is found, public pool resources are used. In this mode, you do not need to set the PrivatePoolOptions.Id parameter.

• Target: specified mode. Uses the specified private pool capacity to launch the instance. If the private pool capacity is unavailable, the instance launch fails. In this mode, you must specify a private pool ID, so PrivatePoolOptions.Id is required.

• None: no-use mode. The instance launch does not use private pool capacity.

PrivatePoolOptions.Id

String

No

eap-bp67acfmxazb4****

The ID of the private pool. This is the ID of the elasticity assurance or capacity reservation.

SpotDuration

Integer

No

1

The protection period of the spot instance. Unit: hours. Valid values:

• 1: After creation, Alibaba Cloud ensures the instance runs for 1 hour without being automatically released. After 1 hour, the system automatically compares the bid price with the market price and checks resource inventory to decide whether to retain or reclaim the instance.

• 0: After creation, Alibaba Cloud cannot guarantee the instance runs for 1 hour. The system automatically compares the bid price with the market price and checks resource inventory to decide whether to retain or reclaim the instance.

  Note

  Alibaba Cloud sends a notification through ECS system events within 5 minutes before the instance is reclaimed. Spot instances are billed by the second. Select an appropriate protection period based on your task duration.

Default value: 1.

SpotInterruptionBehavior

String

No

Terminate

The interruption mode of the spot instance. Only Terminate (default) is supported, which directly releases the instance.

InstanceTypes.N

String

No

ecs.g6.large

Multiple instance type parameters. N ranges from 1 to 20, meaning you can specify up to 20 instance types in a scaling configuration.

N represents the priority of the instance type in the current scaling configuration. The instance type with N=1 has the highest priority. Priority decreases as N increases. If an instance cannot be created with a higher-priority instance type, Auto Scaling automatically selects the next-priority instance type.

InstanceTypeOverride.N.InstanceType

String

No

ecs.c5.xlarge

To specify the capacity of an instance type in the scaling configuration, specify both this parameter and InstanceTypeOverride.N.WeightedCapacity.

This parameter specifies the instance type. You can specify N of this parameter, combined with InstanceTypeOverride.N.WeightedCapacity, to extend multi-instance type support with custom weights. N ranges from 1 to 20.

For valid values of InstanceType, see Instance families.

InstanceTypeOverride.N.WeightedCapacity

Integer

No

4

To specify the capacity of an instance type in the scaling configuration, specify this parameter after specifying InstanceTypeOverride.N.InstanceType. The two parameters correspond one-to-one, and N must be consistent.

This parameter specifies the weight of the instance type, indicating the capacity size of a single instance of this type in the scaling group. A larger weight means fewer instances of this type are needed to meet the desired capacity.

Because performance metrics such as the number of vCPUs and memory size vary for each instance type, you can configure different weights based on your needs.

Example:

• Current capacity: 0.

• Desired capacity: 6.

• ecs.c5.xlarge capacity: 4.

To meet the desired capacity, the scaling group scales out two ecs.c5.xlarge instances.

WeightedCapacity ranges from 1 to 500.

DataDisk.N.PerformanceLevel

String

No

PL1

The performance level (PL) of the ESSD data disk. The value of N must match the N in DataDisk.N.Category=cloud_essd. Valid values:

• PL0: An ESSD provides up to 10,000 random read/write IOPS.

• PL1: An ESSD provides up to 50,000 random read/write IOPS.

• PL2: An ESSD provides up to 100,000 random read/write IOPS.

• PL3: An ESSD provides up to 1,000,000 random read/write IOPS.

Default value: PL1.

DataDisk.N.AutoSnapshotPolicyId

String

No

sp-bp19nq9enxqkomib****

The ID of the automatic snapshot policy applied to the data disk. N ranges from 1 to 16.

DataDisk.N.Encrypted

String

No

false

Specifies whether to encrypt data disk N. N ranges from 1 to 16. Valid values:

• true: Encrypt.

• false: Do not encrypt.

Default value: false.

DataDisk.N.Description

String

No

Test data disk.

The description of data disk N. N ranges from 1 to 16. The description must be 2 to 256 characters in length and can contain letters and Chinese characters. It cannot start with http:// or https://.

DataDisk.N.SnapshotId

String

No

s-280s7****

The snapshot used to create the data disk. N ranges from 1 to 16. After you specify this parameter, DataDisk.N.Size is ignored, and the actual disk size created equals the size of the specified snapshot.

If the snapshot was created on or before July 15, 2013, the call is rejected and returns InvalidSnapshot.TooOld.

DataDisk.N.Categories.N

String

No

cloud

Multiple disk types for data disk N. The first N indicates the Nth data disk (range: 1 to 16). The second N indicates the Nth disk type for the Nth data disk (range: 1 to 4), meaning you can specify up to four disk types for a data disk in a scaling configuration. A smaller N indicates higher priority. If a disk cannot be created using a higher-priority disk type, Auto Scaling automatically tries the next-priority disk type. Valid values:

• cloud: basic disk. The DeleteWithInstance property of a basic disk created with an instance is true.

• cloud_efficiency: ultra disk.

• cloud_ssd: standard SSD.

• cloud_essd: ESSD.

DataDisk.N.Size

Integer

No

100

The size of data disk N. N ranges from 1 to 16. Unit: GiB. Valid values:

• cloud: 5 to 2000.

• cloud_efficiency: 20 to 32768.

• cloud_ssd: 20 to 32768.

• cloud_essd: 20 to 32768.

• ephemeral_ssd: 5 to 800.

After you specify this parameter, the disk size must be greater than or equal to the snapshot size (specified by SnapshotId).

DataDisk.N.Device

String

No

/dev/xvdb

The mount point of the data disk. N ranges from 1 to 16. If you do not specify this parameter, the system automatically assigns a mount point when creating the ECS instance, starting from /dev/xvdb and ending at /dev/xvdz.

DataDisk.N.DiskName

String

No

cloud_ssdData

The name of data disk N. N ranges from 1 to 16. The name must be 2 to 128 characters in length and can contain letters and Chinese characters. It must start with a letter or a Chinese character and cannot start with http:// or https://. It can contain digits, colons (:), underscores (_), and hyphens (-).

DataDisk.N.Category

String

No

cloud_ssd

The category of data disk N. N ranges from 1 to 16. Valid values:

• cloud: basic disk. The DeleteWithInstance property of a basic disk created with an instance is true.

• cloud_efficiency: ultra disk.

• cloud_ssd: standard SSD.

• ephemeral_ssd: local SSD.

• cloud_essd: ESSD.

• cloud_auto: ESSD AutoPL disk.

You cannot specify this parameter and DataDisk.N.Categories.N at the same time. If neither parameter is specified, the default value is:

• For I/O optimized instances: cloud_efficiency.

• For non-I/O optimized instances: cloud.

DataDisk.N.DeleteWithInstance

Boolean

No

true

Specifies whether to release the data disk when the instance is released. N ranges from 1 to 16. Valid values:

• true: The disk is released with the instance.

• false: The disk is retained when the instance is released.

This parameter applies only to standalone disks (DataDisk.N.Category is cloud, cloud_efficiency, cloud_ssd, cloud_essd, or cloud_auto). Otherwise, an error occurs.

Default value: true.

DataDisk.N.KMSKeyId

String

No

0e478b7a-4262-4802-b8cb-00d3fb40****

The ID of the KMS key for the data disk. N ranges from 1 to 16.

DataDisk.N.ProvisionedIops

Long

No

100

The provisioned IOPS (input/output operations per second) performance metric of the data disk.

DataDisk.N.BurstingEnabled

Boolean

No

false

Specifies whether to enable Burst (performance bursting) for the data disk. Valid values:

• true: Enable.

• false: Do not enable.

  Note

  This parameter is supported only when DataDisk.Category is set to cloud_auto.

For more information, see ESSD AutoPL disks.

SpotPriceLimit.N.PriceLimit

Float

No

0.5

The bid price for the spot instance. N ranges from 1 to 20. This parameter takes effect only when SpotStrategy is set to SpotWithPriceLimit.

SpotPriceLimit.N.InstanceType

String

No

ecs.g6.large

The instance type of the spot instance. N ranges from 1 to 20. This parameter takes effect only when SpotStrategy is set to SpotWithPriceLimit.

SecurityGroupIds.N

String

No

sg-bp18kz60mefs****

Adds the ECS instance to multiple security groups simultaneously. The range of N depends on the maximum number of security groups an instance can join. For more information, see the Security group section in Limits.

InstancePatternInfo.N.Cores

Integer

No

2

In intelligent configuration mode, this is the number of vCPU cores for the instance type, used to filter eligible instance types. For more information, see Instance families. N ranges from 1 to 10.

Note the following:

• The InstancePatternInfo.N parameter applies only when the network type of the scaling group is VPC.

• The InstancePatternInfo.N parameter requires both InstancePatternInfo.N.Cores and InstancePatternInfo.N.Memory to be configured.

• If you have already specified an instance type using InstanceType or InstanceTypes.N, Auto Scaling prioritizes your specified instance type for scale-outs. If the specified instance type is out of stock, it uses the lowest-priced instance type from those matching the InstancePatternInfo.N parameter values.

InstancePatternInfo.N.InstanceFamilyLevel

String

No

EnterpriseLevel

In intelligent configuration mode, this is the instance family level, used to filter eligible instance types. Valid values:

• EntryLevel: entry-level, which refers to shared-resource instances. These are more cost-effective but cannot guarantee stable computing performance. They are suitable for scenarios with low CPU usage. For more information, see Shared-resource instances.

• EnterpriseLevel: enterprise-level. These offer stable performance and dedicated resources, suitable for scenarios requiring high stability. For more information, see Instance families.

• CreditEntryLevel: credit entry-level, which refers to burstable instances. These use CPU credits to ensure computing performance and are suitable for scenarios with low CPU usage and occasional CPU bursts. For more information, see Burstable instances.

N ranges from 1 to 10.

InstancePatternInfo.N.MaxPrice

Float

No

2

In intelligent configuration mode, this is the maximum hourly price you accept for a pay-as-you-go or spot instance, used to filter eligible instance types. N ranges from 1 to 10.

InstancePatternInfo.N.Memory

Float

No

4

In intelligent configuration mode, this is the memory size of the instance type, used to filter eligible instance types. Unit: GiB. For more information, see Instance families. N ranges from 1 to 10.

InstancePatternInfo.N.ExcludedInstanceType.N

String

No

ecs.n1.small/ecs.n1.*/*7*

The instance types to exclude. Use a wildcard character (*) to exclude a single type or an entire family. Examples:

• ecs.c6.large: Excludes the ecs.c6.large instance type.

• ecs.c6.*: Excludes the entire c6 instance family.

InstancePatternInfo.N.Architecture.N

String

No

X86

The architecture type of the instance type. Valid values:

• X86: X86 compute.

• Heterogeneous: heterogeneous computing, such as GPU or FPGA.

• BareMetal: Elastic Compute Service Bare Metal Instance.

• Arm: Arm compute.

Default value: Includes all architecture types.

InstancePatternInfo.N.BurstablePerformance

String

No

Include

Specifies whether the instance type is a burstable instance. Valid values:

• Exclude: Does not include burstable instance types.

• Include: Includes burstable instance types.

• Required: Includes only burstable instance types.

Default value: Include.

InstancePatternInfo.N.InstanceTypeFamilies.N

String

No

ecs.g6

The specified instance families. N indicates you can set multiple instance families. N ranges from 1 to 10.

InstancePatternInfo.N.MinimumCpuCoreCount

Integer

No

2

The minimum number of vCPU cores for the instance type.

InstancePatternInfo.N.MaximumCpuCoreCount

Integer

No

4

The maximum number of vCPU cores for the instance type.

InstancePatternInfo.N.GpuSpecs.N

String

No

NVIDIA V100

The GPU type.

InstancePatternInfo.N.InstanceCategories.N

String

No

Compute-optimized with GPU

The instance classification. Valid values:

• General-purpose: general-purpose.

• Compute-optimized: compute-optimized.

• Memory-optimized: memory-optimized.

• Big data: big data.

• Local SSDs: local SSDs.

• High Clock Speed: high frequency.

• Enhanced: enhanced.

• Shared: shared-resource.

• Compute-optimized with GPU: GPU-accelerated compute-optimized.

• Visual Compute-optimized: visual compute-optimized.

• Heterogeneous Service: heterogeneous service.

• Compute-optimized with FPGA: FPGA-accelerated compute-optimized.

• Compute-optimized with NPU: NPU-accelerated compute-optimized.

• ECS Bare Metal: Elastic Compute Service Bare Metal Instance.

• High Performance Compute: high-performance computing (HPC).

InstancePatternInfo.N.CpuArchitectures.N

String

No

X86

The CPU architecture of the instance. Valid values:

• X86.

• ARM.

InstancePatternInfo.N.PhysicalProcessorModels.N

String

No

Intel Xeon(Ice Lake) Platinum 8369B", "Intel Xeon(Skylake) Platinum 8163", … "Intel Xeon(Cascade Lake) Platinum 8269CY

The processor model of the instance. N indicates you can set multiple processor models. N ranges from 1 to 10.

InstancePatternInfo.N.MinimumEniQuantity

Integer

No

2

The maximum number of elastic network interfaces (ENIs) that can be attached to an instance.

InstancePatternInfo.N.MinimumEniPrivateIpAddressQuantity

Integer

No

2

The maximum number of IPv4 addresses per elastic network interface (ENI) on the instance.

InstancePatternInfo.N.MinimumEniIpv6AddressQuantity

Integer

No

1

The maximum number of IPv6 addresses per Elastic Network Interface (ENI) on an instance.

InstancePatternInfo.N.MinimumInitialCredit

Integer

No

12

The minimum initial vCPU credits for a t5 or t6 burstable instance.

InstancePatternInfo.N.MinimumBaselineCredit

Integer

No

12

The minimum baseline vCPU computing performance (sum of all vCPUs) for a t5 or t6 burstable instance.

InstancePatternInfo.N.MinimumMemorySize

Float

No

4

The minimum memory size of the instance. Unit: GiB.

InstancePatternInfo.N.MaximumMemorySize

Float

No

4

The maximum memory size of the instance. Unit: GiB.

InstancePatternInfo.N.MinimumGpuAmount

Integer

No

2

The minimum number of GPUs for the instance. The value must be a positive integer.

InstancePatternInfo.N.MaximumGpuAmount

Integer

No

2

The maximum number of GPUs for the instance. The value must be a positive integer.

SystemDiskCategories.N

String

No

cloud

Multiple disk types for the system disk. N ranges from 1 to 4, meaning you can specify up to four disk types for the system disk in a scaling configuration. A smaller N indicates higher priority. If a disk cannot be created using a higher-priority disk type, Auto Scaling automatically tries the next-priority disk type. Valid values:

• cloud: basic disk.

• cloud_efficiency: ultra disk.

• cloud_ssd: standard SSD.

• cloud_essd: ESSD.

SystemDisk.Encrypted

Boolean

No

false

Specifies whether to encrypt the system disk. Valid values:

• true: Encrypt.

• false: Do not encrypt.

Default value: false.

SystemDisk.KMSKeyId

String

No

0e478b7a-4262-4802-b8cb-00d3fb40****

The ID of the KMS key used for the system disk.

SystemDisk.EncryptAlgorithm

String

No

AES-256

The encryption algorithm used for the system disk. Valid values:

• AES-256.

• SM4-128.

Default value: AES-256.

SystemDisk.ProvisionedIops

Long

No

100

The provisioned IOPS (input/output operations per second) performance metric of the system disk.

SystemDisk.BurstingEnabled

Boolean

No

false

Specifies whether to enable Burst (performance bursting) for the system disk. Valid values:

• true: Enable.

• false: Do not enable.

  Note

  This parameter is supported only when SystemDisk.Category is set to cloud_auto.

For more information, see ESSD AutoPL disks.

ImageOptions.LoginAsNonRoot

Boolean

No

false

Specifies whether to log on to the ECS instance as the ecs-user user. For more information, see Manage logon usernames of ECS instances. Valid values:

• true: Yes.

• false: No.

Default value: false.

DeletionProtection

Boolean

No

false

The release protection attribute of the ECS instance. This applies only to pay-as-you-go instances and indicates whether the instance can be directly released through the ECS console or API (DeleteInstance). Valid values:

• true: Enables instance release protection, preventing direct release through the ECS console or API (helps prevent accidental deletion of scaled-out instances in Auto Scaling).

• false: Disables instance release protection, allowing direct release through the ECS console or API.

Default value: false.

StorageSetId

String

No

ss-bp67acfmxazb4p****

The ID of the storage set.

StorageSetPartitionNumber

Integer

No

2

The maximum number of partitions in the storage set. The value must be an integer greater than or equal to 2.

CustomPriorities.N.InstanceType

String

No

ecs.g6.large

The CustomPriorities field indicates the custom priority of an ECS instance type + virtual switch combination. The CustomPriorities.N.InstanceType parameter specifies the instance type in the custom priority.

If an ECS instance cannot be created based on a higher-priority ECS instance type + virtual switch combination, Auto Scaling automatically selects the next-priority combination.

CustomPriorities.N.VswitchId

String

No

vsw-bp14zolna43z266bq****

The CustomPriorities.N.VswitchId parameter specifies the ID of the vSwitch for a custom priority.

NetworkInterfaces.N.InstanceType

String

No

Primary

The type of the ENI. When using NetworkInterfaces.N, you must configure a primary ENI, but you cannot set SecurityGroupId or SecurityGroupIds.N at the same time. Valid values:

• Primary: primary ENI.

• Secondary: secondary ENI.

Default value: Secondary.

NetworkInterfaces.N.NetworkInterfaceTrafficMode

String

No

HighPerformance

The communication mode of the network interface. Valid values:

• Standard: uses TCP communication mode.

• HighPerformance: enables the Elastic RDMA Interface (ERI) and uses RDMA communication mode.

Default value: Standard.

NetworkInterfaces.N.Ipv6AddressCount

Integer

No

1

The number of randomly generated IPv6 addresses to assign to the primary ENI. Note the following:

• This parameter takes effect only if NetworkInterfaces.N.InstanceType is set to Primary.

• You cannot set this parameter if NetworkInterface.N.InstanceType is set to Secondary or is empty.

• After setting this parameter, you cannot set the Ipv6AddressCount parameter.

NetworkInterfaces.N.SecurityGroupIds.N

String

No

sg-uf6ij8dwxh****

One or more security group IDs to which the ENI belongs. Note the following:

• If NetworkInterfaces.N.InstanceType is set to Primary, you must set this parameter. In this case, it functions the same as SecurityGroupIds.N, but you cannot set SecurityGroupId or SecurityGroupIds.N at the same time.

• If NetworkInterfaces.N.InstanceType is set to Secondary or is empty, this parameter is optional. The default value is the security group of the ECS instance (that is, the primary ENI's security group).

NetworkInterfaces.N.SecondaryPrivateIpAddressCount

Integer

No

2

The number of secondary private IPv4 addresses to assign to the ENI. Valid values: 1 to 49.

• The value cannot exceed the IP address limit for the instance type. For more information, see Instance families.

• NetworkInterface.N.SecondaryPrivateIpAddressCount specifies the number of secondary private IPv4 addresses (excluding the primary private IP) to assign to the ENI. The system randomly allocates these addresses from the available CIDR block of the virtual switch (NetworkInterface.N.VSwitchId).

DedicatedHostClusterId

String

No

dc-2zedxc67zqzt7lb4****

The ID of the dedicated host cluster.

SecurityOptions.ConfidentialComputingMode

String

No

TDX

The confidential computing mode. Valid values:

• Enclave: The ECS instance uses Enclave to build a confidential computing environment. For more information, see Build a confidential computing environment using Enclave.

• TDX: Builds a TDX confidential computing environment. For more information, see Build a TDX confidential computing environment.

HttpEndpoint

String

No

enabled

Specifies whether to enable the access channel for instance metadata. Valid values:

• enabled: Enable.

• disabled: Disable.

Default value: enabled.

HttpTokens

String

No

optional

Specifies whether to enforce the use of the security-hardened mode (IMDSv2) when accessing instance metadata. Valid values:

• optional: Do not enforce.

• required: Enforce. If you set this value, you cannot access instance metadata in normal mode.

Default value: optional.

ResourcePoolOptions.Strategy

String

No

PrivatePoolFirst

The resource pool includes private pools generated after an elasticity assurance or capacity reservation takes effect, and the public pool, which can be selected when launching an instance. Valid values:

• PrivatePoolFirst: private pool first. When this strategy is selected and ResourcePoolOptions.PrivatePoolIds is specified, the specified private pools are used first. If no private pool is specified or the specified private pools have insufficient capacity, open-type private pools are automatically matched. If no eligible private pools are found, instances are created from the public pool.

• PrivatePoolOnly: private pool only. When this strategy is selected, you must specify ResourcePoolOptions.PrivatePoolIds. If the specified private pools have insufficient capacity, the instance launch fails.

• None: Do not use a resource pool strategy.

Default value: None.

ResourcePoolOptions.PrivatePoolIds.N

String

No

eap-bp67acfmxazb4****

The ID of the private pool. This is the ID of the elasticity assurance or capacity reservation. This parameter accepts only Target mode private pool IDs. N ranges from 1 to 20.

ScalingConfigurationId

String

asc-bp1ffogfdauy0nu5****

The ID of the scaling configuration.

RequestId

String

473469C7-AA6F-4DC5-B3DB-A3DC0DE3****

The ID of the request.