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Server Load Balancer:UpdateLoadBalancerAttribute

Last Updated:Dec 10, 2025

Modifies the attributes of a Gateway Load Balancer (GWLB) instance.

Operation description

  • The UpdateLoadBalancerAttribute operation is asynchronous. After a request is sent, the system returns a request ID and runs the task in the background. You can call the GetLoadBalancerAttribute operation to query the status of the GWLB instance.

    • If the GWLB instance is in the Configuring state, the modification is in progress.

    • If the GWLB instance is in the Active state, the modification is complete.

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Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

gwlb:UpdateLoadBalancerAttribute

update

*LoadBalancer

acs:gwlb:{#regionId}:{#accountId}:loadbalancer/{#LoadBalancerId}

None None

Request parameters

Parameter

Type

Required

Description

Example

LoadBalancerId

string

Yes

The ID of the GWLB instance.

gwlb-9njtjmqt7zfcqm****

LoadBalancerName

string

No

The name of the GWLB instance.

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

testGwlbName

DryRun

boolean

No

Specifies whether to perform a dry run. Valid values:

  • true: performs a dry run. The system checks the required parameters, request format, and service limits. If the request fails the dry run, an error message is returned. If the request passes the dry run, the DryRunOperation error code is returned.

  • false (default): performs a dry run and sends the request. If the request passes the dry run, a 2xx HTTP status code is returned and the operation is performed.

false

ClientToken

string

No

The client token that is used to ensure the idempotence of the request.

You can use the client to generate the token, but you must make sure that the token is unique among different requests. The token can contain only ASCII characters.

Note

If you do not specify this parameter, the system automatically uses the RequestId of the request as the ClientToken. The RequestId may be different for each request.

123e4567-e89b-12d3-a456-426655440000

TrafficMode

string

No

The traffic mode. Valid values:

  • LoadBalance: The traffic is distributed by the GWLB instance.

  • ByPass: The traffic bypasses the GWLB instance.

LoadBalance

Response elements

Element

Type

Description

Example

object

RequestId

string

The request ID.

B956C629-0E8C-5EFF-BAC1-B0E3A8C5CBDD

Examples

Success response

JSON format

{
  "RequestId": "B956C629-0E8C-5EFF-BAC1-B0E3A8C5CBDD"
}

Error codes

HTTP status code

Error code

Error message

Description

400 IncorrectBusinessStatus.LoadBalancer The business status of %s [%s] is incorrect. Resource %s with business state %s does not support current operation
400 IncorrectStatus.LoadBalancer The status of %s [%s] is incorrect. Resource %s current state %s does not support operation
400 ResourceNotFound.LoadBalancer The specified resource of %s is not found.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.