Modifies the attributes of an Application Load Balancer (ALB) instance, such as the status, name, and modification protection.


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Request parameters

Parameter Type Required Example Description
Action String Yes UpdateLoadBalancerAttribute

The operation that you want to perform.

Set the value to UpdateLoadBalancerAttribute.

ClientToken String No 5A2CFF0E-5718-45B5-9D4D-70B3FF3898

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

DryRun Boolean No true

Specifies whether to precheck this request. Valid values:

  • true: prechecks the API request. Resources are not created. The system checks the required parameters, request format and service limits. If the request fails the check, the corresponding error message is returned. If the request passes the precheck, the DryRunOperation error code is returned.
  • false (default): checks the request. After the request passes the check, an HTTP_2xx status code is returned and the operation is performed.
LoadBalancerId String Yes lb-bp1b6c719dfa08ex****

The ID of the ALB instance.

LoadBalancerName String No lb-instance-test

The name must be 2 to 128 characters in length, and can contain letters, digits, periods (.), underscores (_), and hyphens (-). The name must start with a letter.

ModificationProtectionConfig Object No

The configuration of modification protection.

Reason String No ManageInstance

The reason must be 2 to 128 characters in length, and must start with a letter. It can contain digits, periods (.), underscores (_), and hyphens (-).

This parameter is valid only if ModificationProtectionStatus is set to ConsoleProtection.

Status String No ConsoleProtection

Specifies whether to enable the configuration read-only mode for the ALB instance. Valid values:

  • NonProtection: disables the configuration read-only mode. After you disable the configuration read-only mode, you cannot set the ModificationProtectionReason parameter. If the ModificationProtectionReason parameter is set, the configuration is cleared.
  • ConsoleProtection: enables the configuration read-only mode. In this case, you can set the ModificationProtectionReason parameter.

Response parameters

Parameter Type Example Description
JobId String 72dcd26b-f12d-4c27-b3af-18f6aed5****

The ID of the query task.

RequestId String CEF72CEB-54B6-4AE8-B225-F876FF7BA984

The ID of the request.


Sample requests

&Common request parameters

Sample success responses

XML format

HTTP/1.1 200 OK


JSON format

HTTP/1.1 200 OK

  "JobId" : "72dcd26b-f12d-4c27-b3af-18f6aed5****",
  "RequestId" : "CEF72CEB-54B6-4AE8-B225-F876FF7BA984"

Error codes

HttpCode Error code Error message Description
400 IncorrectStatus.LoadBalancer The status of %s [%s] is incorrect. The error message returned because the status of the specified resource %s [%s] is invalid.
400 IncorrectBusinessStatus.LoadBalancer The business status of %s [%s]  is incorrect. The error message returned because the business status of the specified resource %s [%s] is invalid.
404 ResourceNotFound.LoadBalancer The specified resource %s is not found. The error message returned because the specified resource %s does not exist.

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