tencent cloud



Last updated: 2023-12-04 16:31:55

    1. API Description

    Domain name for API request: lighthouse.tencentcloudapi.com.

    This API is used to bind a user-specified key pair to an instance.

    • Only instances on LINUX_UNIX in [RUNNING, STOPPED] status are supported. Instances in RUNNING status will be forcibly shut down before binding.
    • If the public key of a key pair is written to the SSH configuration of the instance, you will be able to log in to the instance with the private key of the key pair.
    • If the instance is already associated with a key, the old key will become invalid.
    • If you currently use a password to log in, you will no longer be able to do so after you associate the instance with a key.
    • Batch operations are supported. The maximum number of instances in each request is 100. If instances not available for the operation are selected, you will get an error code.
    • This API is async. After the request is sent successfully, a RequestId will be returned. At this time, the operation is not completed immediately. The result of the instance operation can be queried by calling the DescribeInstances API. If the latest operation status (LatestOperationState) of the instance is SUCCESS, the operation is successful.

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

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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 Params. The value used for this API: AssociateInstancesKeyPairs.
    Version Yes String Common Params. The value used for this API: 2020-03-24.
    Region No String Common Params. This parameter is not required for this API.
    KeyIds.N Yes Array of String Key pair ID list. Each request can contain up to 100 key pairs.
    InstanceIds.N Yes Array of String Instance ID list. Each request can contain up to 100 instances at a time. You can get an instance ID from the InstanceId returned by the DescribeInstances API.

    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 Binding key pair to instance

    This example shows you how to bind a key pair to an instance.

    Input Example

    POST / HTTP/1.1
    Host: lighthouse.tencentcloudapi.com
    Content-Type: application/json
    X-TC-Action: AssociateInstancesKeyPairs
    <Common request parameters>
        "InstanceIds": [
        "KeyIds": [

    Output Example

        "Response": {
            "RequestId": "f192c1a9-580e-4653-9d54-ba42cd4353a3"

    5. Developer Resources


    TencentCloud API 3.0 integrates SDKs that support various programming languages to make it easier for you to call APIs.

    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
    FailedOperation.DescribeInstanceStatus An error occurred when querying the instance status.
    FailedOperation.InstanceOperationFailed Failed to manipulate the instance.
    InternalError.DescribeInstanceStatus Failed to query the instance status. Please try again later.
    InternalError.InvalidCommandNotFound The command is not found.
    InvalidParameterValue.Duplicated Invalid parameter value: duplicate values are not allowed.
    InvalidParameterValue.InstanceIdMalformed Invalid parameter value: the instance ID format is invalid.
    InvalidParameterValue.KeyPairIdMalformed Invalid parametric value: the key pair ID format is invalid.
    InvalidParameterValue.LimitExceeded Invalid parametric value: the number of parameter values exceeds the upper limit.
    InvalidParameterValue.OutOfRange Invalid parametric value: it is not within the valid range.
    OperationDenied.InstanceCreating It is not allowed to manipulate this instance, as it is being created.
    OperationDenied.InstanceOperationInProgress It is not allowed to manipulate this instance, as the last operation is still in progress.
    ResourceNotFound.InstanceIdNotFound The instance ID does not exist.
    ResourceNotFound.InstanceNotFound The instance does not exist.
    ResourceNotFound.KeyIdNotFound The key pair ID does not exist.
    UnauthorizedOperation.MFAExpired MFA has expired.
    UnauthorizedOperation.MFANotFound MFA does not exist.
    UnauthorizedOperation.NoPermission No permission
    UnsupportedOperation.InvalidInstanceState Unsupported operation: the instance status is invalid.
    UnsupportedOperation.KeyPairBindDuplicate Unsupported operation: one key pair cannot be bound to the same instance repeatedly.
    UnsupportedOperation.LatestOperationUnfinished Unsupported operation: the last operation of the instance has not been completed.
    UnsupportedOperation.WindowsNotAllowToAssociateKeyPair Windows instances do not support binding key pairs.
    UnsupportedOperation.WindowsNotSupportKeyPair SSH key pair is not available for Windows instances
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