You can call this operation to replace the system disk or operating system of an ECS instance. The ID of the system disk is changed and the original disk is released.

Description

When you replace the system disk of an instance, take note of the following points:

  • You cannot change the category of the system disk.
  • You cannot change the billing method of the system disk.
  • The instance must be in the Stopped state.
    Note For VPC-type instances only: You must disable the No Fees for Stopped Instances (VPC-Connected) feature when you stop the instance. This prevents the instance from failing to be restarted due to insufficient ECS resources after the system disk is replaced. For more information, see StopInstance.
  • Make sure that the OperationLocks parameter of the instance is not set to "LockReason" : "security". For more information, seeAPI behavior when an instance is locked for security reasons.
  • The instance to which the system disk is attached cannot have an unpaid order.
  • You can set the SystemDisk.Size parameter to re-specify the capacity of the system disk.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
InstanceId String Yes i-m-bp67acfmxazb4ph***

The ID of the instance.
Action String Yes ReplaceSystemDisk

The operation that you want to perform. If you use a custom HTTP URL or HTTPS URL to make an API request, you must specify the Action parameter. Set the value to ReplaceSystemDisk.

ImageId String No m-bp67acfmxazb4ph***

The ID of the image used when the operating system is replaced.
SystemDisk.Size Integer No 80

The capacity of the new system disk. Unit: GiB. Valid values: Max{20, the size of the image specified by ImageId} to 500.

Default value: Max{40, the size of the image specified by ImageId}.

Note You will be charged for the capacity that exceeds Max{20, the capacity of the original system disk}.
ClientToken String No 123e4567-e89b-12d3-a456-426655440000

The client token that is used to ensure the idempotence of the request. You can use the client to generate the value, but you must ensure that it is unique among different requests. The ClientToken value can only contain ASCII characters and cannot exceed 64 characters in length. For more information, see How to ensure idempotence.

UseAdditionalService Boolean No true

Specifies whether to use the virtual machine system configuration provided by Alibaba Cloud (Windows: NTP and KMS. Linux: NTP and YUM).

Note This parameter is valid when you attach a system disk whose device name is /dev/xvda.
Password String No EcsV587!

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


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

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

The default value is the original password.

Note If the Password parameter is specified, we recommend that you send requests over HTTPS to secure your password.
KeyPairName String No JoshuaCentOS

The name of the key pair.

Note This parameter is applicable only to Linux instances. You can bind an SSH key pair to the instance as a logon credential. However, the password logon method will be disabled after you bind the SSH key pair.
PasswordInherit Boolean No false

Specifies whether to use the password preset in the image.

Default value: false.

Note If the PasswordInherit parameter is set to true, you must not specify the Password parameter, and must ensure that the selected image has a password configured.
Platform String No CentOS

The release version of the operating system. Valid values:

  • CentOS
  • Ubuntu
Architecture String No i386

The system architecture. Valid values:

  • i386
  • x86_64
SecurityEnhancementStrategy String No Active

Specifies whether to use Security Center for free after you replace the system disk. Valid values:

  • Active: Security Center is used for free after the system disk is replaced. This value is applicable only to public images.
  • Deactive: Security Center is not used for free after the system disk is replaced. This value is applicable to all images.

Default value: Deactive.

Response parameters

Parameter Type Example Description
DiskId String d-bp67acfmxazb4ph***

The ID of the new system disk.
RequestId String 473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E

The ID of the request.

Examples

Sample requests

https://ecs.aliyuncs.com/?Action=ReplaceSystemDisk
&InstanceId=i-bp67acfmxazb4ph***
&ImageId=m-bp67acfmxazb4ph***
&SystemDisk.Size=80
&ClientToken=123e4567-e89b-12d3-a456-426655440000
&PasswordInherit=false
&KeyPairName=JoshuaCentOS
&SecurityEnhancementStrategy=Active
&<Common request parameters>

Sample success responses

XML format 

<ReplaceSystemDiskResponse>
      <DiskId>d-bp67acfmxazb4ph***</DiskId>
      <RequestId>F3CD6886-D8D0-4FEE-B93E-1B73239673DE</RequestId>
</ReplaceSystemDiskResponse>

JSON format 

{
	"RequestId":"337568C5-64F3-4B76-8CDD-D3D8C57B5B8C",
	"DiskId":"d-bp67acfmxazb4ph***"
}

Error codes

HTTP status code Error code Error message Description
404 InvalidInstanceId.NotFound The specified InstanceId does not exist. The error message returned because the specified InstanceId parameter does not exist. Check whether the instance ID is correct.
400 InvalidSystemDiskSize.ValueNotSupported The specified parameter SystemDisk.Size is invalid. The error message returned because the specified SystemDisk.Size parameter is invalid.
404 InvalidInstanceId.NotFound The specified instance does not exist. The error message returned because the specified InstanceId parameter does not exist. Check whether the instance ID is correct.
404 InvalidImageId.NotFound The specified ImageId does not exist. The error message returned because the specified image does not exist under this account. Check whether the image ID is correct.
403 IncorrectInstanceStatus The current status of the resource does not support this operation. The error message returned because the operation is not supported while the resource is in the current state.
403 InstanceLockedForSecurity The instance is locked due to security. The error message returned because the operation is not supported while the instance is locked for security reasons.
403 ImageNotSubscribed The specified image has not be subscribed. The error message returned because you have not subscribed to the specified Alibaba Cloud Marketplace image.
403 ImageRemovedInMarket The specified market image is not available, Or the specified user defined image includes product code because it is based on an image subscribed from marketplace, and that image in marketplace includeing exact the same product code has been removed. The error message returned because the specified Alibaba Cloud Marketplace image is unavailable.
500 OperationDenied Internal Error. The error message returned because an internal error has occurred.
400 InvalidParameter.Conflict The specified image does not support the specified instance type. The error message returned because the specified image cannot be used for the specified instance type.
404 InvalidSystemDiskSize.MoreThanMaxSize The specified SystemDisk.Size parameter exceeds the maximum size. The error message returned because the maximum size of the specified system disk has been reached.
500 InternalError The request processing has failed due to some unknown error. The error message returned because an internal error has occurred. Try again later. If the problem persists, submit a ticket.
403 InstanceExpiredOrInArrears The specified operation is denied as your prepay instance is expired (prepay mode) or in arrears (afterpay mode). The error message returned because the subscription instance has expired. Renew the instance first.
403 ChargeTypeViolation The operation is not permitted due to charge type of the instance. The error message returned because the billing method of the instance does not support this operation.
403 DiskCreatingSnapshot The operation is denied due to a snapshot of the specified disk is not completed yet. The error message returned because a snapshot of the specified disk is being created.
403 IoOptimized.NotSupported The specified image is not support IoOptimized Instance. The error message returned because the specified image does not support I/O optimized instances.
403 ImageNotSupportInstanceType The specified image don not support the InstanceType instance. The error message returned because the specified image does not support the specified instance type.
403 QuotaExceed.BuyImage The specified image is from the image market,You have not bought it or your quota has been exceeded. The error message returned because you have not purchased the specified Alibaba Cloud Marketplace image or you have no image quotas.
404 InvalidSystemDiskSize.LessThanImageSize The specified parameter SystemDisk.Size is less than the image size. The error message returned because the specified system disk size is smaller than the image size.
404 InvalidSystemDiskSize.LessThanMinSize The specified parameter SystemDisk.Size is less than the min size. The error message returned because the specified system disk size is smaller than the minimum allowable size.
404 NoSuchResource The specified resource is not found. The error message returned because the specified resource does not exist.
400 InvalidSystemDiskSize.ImageNotSupportResize The specified image does not support resize. The error message returned because the specified image does not support resizing.
400 InvalidSystemDiskSize The specified parameter SystemDisk.Size is invalid. The error message returned because the specified SystemDisk.Size parameter is invalid.
403 INST_HAS_UNPAID_ORDER The instance has unpaid order. The error message returned because you have unpaid orders for the instance.
400 InvalidSystemDiskSize.ValueNotSupported The specified parameter SystemDisk.Size is invalid The error message returned because the specified SystemDisk.Size parameter is invalid.
400 InvalidPassword.Malformed The specified parameter "Password" is not valid. The error message returned because the specified Password parameter is invalid.
400 InvalidPasswordParam.Mismatch The input password should be null when passwdInherit is true. The error message returned because the Password parameter is specified while the PasswordInherit parameter is set to true.
400 OperationDenied The specified image contains the snapshot of the data disk,does not support this operation. The error message returned because the specified image contains the snapshot of the data disk and cannot be exported.
400 InvalidDiskCategory.ValueNotSupported The specified parameter "DiskCategory" is not valid. The error message returned because the specified DiskCategory parameter is invalid.
403 OperationDenied.InstanceCreating The specified instance is creating. The error message returned because the specified instance already exists.
400 InvalidParameter.Conflict %s The error message returned because the parameter conflicts with another parameter.
400 InvalidSystemDiskSize.ValueNotSupported %s The error message returned because the specified SystemDisk.Size parameter is invalid.
400 OperationDenied %s The error message returned because the operation is denied.
400 InvalidKeyPairName.NotFound The specified KeyPairName does not exist. The error message returned because the specified KeyPairName parameter does not exist.
400 DependencyViolation.IoOptimize The specified parameter InstanceIds is not valid. The error message returned because the specified InstanceIds parameter is invalid.
403 InvalidParameter.NotMatch %s The error message returned because the parameter conflicts with another parameter.
400 MissingParameter.Architecture Architecture should not be null. The error message returned because the required Architecture parameter is not specified.
400 InvalidArchitecture.Malformed Architecture is not valid. The error message returned because the specified Architecture parameter is invalid.
400 MissingParameter.Platform Platform should not be null. The error message returned because the required Platform parameter is not specified.
400 InvalidPlatform.Malformed Platform is not valid. The error message returned because the specified Platform parameter is invalid.
400 InvalidParameter.AllEmpty %s The error message returned because the required parameters are not specified.
400 InvalidDiskId.NotFound The specified disk do not exist. The error message returned because the specified DiskId parameter does not exist.
400 InvalidDatadisk.DiskStatusViolation The operation is not permitted due to status of the Datadisk. The error message returned because the operation is not supported while the data disk is in the current state.
400 InvalidDatadisk.DiskCategoryViolation The operation is not permitted due to category of the Datadisk. The error message returned because the category of the specified data disk is not supported.
403 ResourcesNotInSameZone The specified instance and disk are not in the same zone. The error message returned because the specified instance and disk are not in the same zone.
400 InvalidSystemDiskSize.ValueNotSupported The specified SystemDiskSize is not valid. The error message returned because the specified SystemDisk.Size parameter is invalid.
400 MissingParameter The input parameter "ImageId" that is mandatory for processing this request is not supplied. The error message returned because the required ImageId parameter is not specified.
403 ImageNotSupportInstanceType The specified instanceType is not supported by instance with marketplace image. The error message returned because the specified Alibaba Cloud Marketplace image does not support the specified instance type.
500 InternalError The request processing has failed due to some unknown error, exception or failure. The error message returned because an unknown error has occurred.

For a list of error codes, visit the API Error Center.