The following list of request parameters only lists interface request parameters and some public parameters, For a complete list of public parameters see public request parameters.

Parameter name	Required	Allow NULL	Type	Description
Action	Yes	No	String	Public parameter, The value of this interface: InstanceAttachISO
Version	Yes	No	String	Public parameter, The value of this interface: 2017-03-12
Region	No	No	String	Public parameter,Regional information A list of supported geographies is available through the DescribeRegions interface
InstanceId	Yes	No	String	ID of the instance for mounting the ISO image Example: ins-61dyt49h
ImageUrl	Yes	No	String	COS address where the ISO image is stored Example: http://111-1251533127.cosd.convergecloud.com/kiki/4769fxg.vmdk
Architecture	Yes	No	String	Operating system architecture of the ISO image: x86_64 or arm_64 Example: x86_64
OsType	Yes	No	String	Operating system type of the ISO image Example: CentOS
OsVersion	Yes	No	String	Operating system version of the ISO image Example: 7.2.1
DryRun	No	No	Bool	Check parameters only, do not execute task. Example: true

3. Output Parameters

Parameter name	Type	Description
RequestId	String	Unique request id, Each request will return. The RequestId of the request needs to be provided when locating the problem.

4. Error Code

The following lists only the error codes related to the interface business logic, For other error codes, see public ErrorCode.

Error Code	Description
InvalidImageOsVersion.Unsupported	Unsupported operating system version.
InvalidParameter.InvalidParameterUrlError	Incorrect URL address.
InvalidImageOsType.Unsupported	Unsupported operating system type.
InvalidInstanceId.NotFound	No corresponding instance was found.