Last updated: 2020-07-17 16:32:58

    1. API Description

    Domain name for API request:

    This API is used to reset the password of the operating system instances to a user-specified password.

    • To modify the password of the administrator account: the name of the administrator account varies with the operating system. In Windows, it is Administrator; in Ubuntu, it is ubuntu; in Linux, it is root.
    • To reset the password of a running instance, you need to set the parameter ForceStop to True for a forced shutdown. If not, only passwords of stopped instances can be reset.
    • Batch operations are supported. You can reset the passwords of up to 100 instances to the same value once.
    • You can call the DescribeInstances API and find the result of the operation in the response parameter LatestOperationState. If the value is SUCCESS, the operation is successful.

    A maximum of 10 requests can be initiated per second for this API.

    Note: This API supports Finance regions. If the common parameter Region is a Finance region, a domain name with the Finance region needs to be specified, for example:

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    2. Input Parameters

    The following request parameter list only provides API request parameters and some common parameters. For the complete common parameter list, see Common Request Parameters.

    Parameter Name Required Type Description
    Action Yes String Common parameter. The value used for this API: ResetInstancesPassword.
    Version Yes String Common parameter. The value used for this API: 2017-03-12.
    Region Yes String Common parameter. For more information, please see the list of regions supported by the product.
    InstanceIds.N Yes Array of String Instance ID(s). To obtain the instance IDs, you can call DescribeInstances and look for InstanceId in the response. The maximum number of instances in each request is 100.
    Password Yes String Login password of the instance. The rule of password complexity varies with operating systems:
    For a Linux instance, the password must be 8 to 30 characters in length; password with more than 12 characters is recommended. It cannot begin with "/", and must contain at least three types of the following:
  • Lowercase letters: [a-z]
  • Uppercase letters: [A-Z]
  • Numbers: 0-9
  • Special characters: ()`!@#$%^&*-+=_|{}[]:;'<>,.?/
    For a Windows CVM, the password must be 12 to 30 characters in length. It cannot begin with "/" or contain your username. It must contain at least three types of the following:
  • Lowercase letters: [a-z]
  • Uppercase letters: [A-Z]
  • Numbers: 0-9
  • Special characters: ()`!@#$%^&*-+=_|{}[]:;' <>,.?/
  • If the specified instances include both Linux and Windows instances, you need to follow the password requirements for Windows instances.
  • UserName No String Username of the instance operating system for which the password needs to be reset. This parameter is limited to 64 characters.
    ForceStop No Boolean Whether to force shut down a running instances. It is recommended to manually shut down a running instance before resetting the user password. Valid values:
  • TRUE: force shut down an instance after a normal shutdown fails.
  • FALSE: do not force shut down an instance after a normal shutdown fails.

    Default value: FALSE.

    A forced shutdown is similar to switching off the power of a physical computer. It may cause data loss or file system corruption. Be sure to only force shut down a CVM when it cannot be shut down normally.
  • 3. Output Parameters

    Parameter Name Type Description
    RequestId String The unique request ID, which is returned for each request. RequestId is required for locating a problem.

    4. Example

    Example1 Resetting the password of a Linux/Windows instance

    This example shows you how to reset the password of a Linux/Windows instance, and then use the new password to log in to the instance.

    Input Example

    &<common request parameters>

    Output Example

      "Response": {
        "RequestId": "6ef60bec-0242-43af-bb20-270359fb54a7"

    5. Developer Resources

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    Command Line Interface

    6. Error Code

    The following only lists the error codes related to the API business logic. For other error codes, see Common Error Codes.

    Error Code Description
    InternalServerError Internal error.
    InvalidInstance.NotSupported This instance is not supported.
    InvalidInstanceId.Malformed Invalid instance ID. The specified instance ID has an invalid format. For example, ins-1122 has an invalid ID length.
    InvalidInstanceId.NotFound No instance found.
    InvalidParameterValue Invalid parameter value: parameter value is in the wrong format or is not supported.
    InvalidParameterValue.LimitExceeded The number of parameter values exceeds the limit.
    InvalidParameterValue.TooLong Invalid parameter value: parameter value is too long.
    InvalidPassword Invalid password. The specified password does not meet the password requirements. For example, the password length does not meet the requirements.
    MissingParameter Missing parameter: a required parameter is missing.

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