All Products
Search
Document Center

Server Load Balancer:SetLoadBalancerUDPListenerAttribute

Last Updated:Sep 20, 2024

Modifies the configurations of a UDP listener.

Operation description

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer.

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

  • Operation: the value that you can use in the Action element to specify the operation on a resource.
  • Access level: the access level of each operation. The levels are read, write, and list.
  • Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
    • The required resource types are displayed in bold characters.
    • If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
  • Condition Key: the condition key that is defined by the cloud service.
  • Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.
OperationAccess levelResource typeCondition keyAssociated operation
slb:SetLoadBalancerUDPListenerAttributeupdate
  • acl
    acs:slb:{#regionId}:{#accountId}:acl/{#aclId}
  • loadbalancer
    acs:slb:{#regionId}:{#accountId}:loadbalancer/{#loadbalancerId}
  • slb:tag
none

Request parameters

ParameterTypeRequiredDescriptionExample
RegionIdstringNo

The region ID of the CLB instance.

You can call the DescribeRegions operation to query the most recent region list.

cn-hangzhou
LoadBalancerIdstringYes

The ID of the CLB instance.

lb-bp1rtfnodmywb43ecu4sf-c****
ListenerPortintegerYes

The frontend port used by the CLB instance.

Valid values: 1 to 65535.

80
BandwidthintegerNo

The maximum bandwidth of the listener. Unit: Mbit/s. Valid values:

  • -1: For a pay-by-data-transfer Internet-facing CLB instance, you can set this parameter to -1. This way, the bandwidth of the listener is unlimited.
  • 1 to 5120: For a pay-by-bandwidth Internet-facing CLB instance, you can specify the maximum bandwidth of each listener. The sum of bandwidth limits that you set for all listeners cannot exceed the maximum bandwidth of the CLB instance.
-1
SchedulerstringNo

The scheduling algorithm. Valid values:

  • wrr: Backend servers with higher weights receive more requests than those with lower weights.

    If two backend servers have the same weight, the backend server that has fewer connections is expected to receive more requests.

  • rr: Requests are distributed to backend servers in sequence.

  • sch: specifies consistent hashing that is based on source IP addresses. Requests from the same source IP address are distributed to the same backend server.

  • tch: specifies consistent hashing that is based on the following parameters: source IP address, destination IP address, source port, and destination port. Requests that contain the same preceding information are distributed to the same backend server.

  • qch: specifies consistent hashing that is based on QUIC connection IDs. Requests that contain the same QUIC connection ID are distributed to the same backend server.

Note
  • Only high-performance CLB instances support sch, tch, and qch.
  • You cannot switch the algorithm used by a CLB instance from wrr or rr to consistent hashing or from consistent hashing to weighted round robin or round robin.
wrr
HealthyThresholdintegerNo

The number of times that an unhealthy backend server must consecutively pass health checks before it can be declared healthy (from fail to success).

Valid values: 1 to 10.

4
UnhealthyThresholdintegerNo

The number of times that a healthy backend server must consecutively fail health checks before it is declared unhealthy. In this case, the health status is changed from success to fail.

Valid values: 1 to 10.

4
HealthCheckConnectTimeoutintegerNo

The timeout period of a health check. If a backend server, such as an Elastic Compute Service (ECS) instance, does not return a health check response within the specified timeout period, the server fails the health check. Unit: seconds.

Valid values: 1 to 300.

Note If the value of the HealthCheckConnectTimeout parameter is smaller than that of the HealthCheckInterval parameter, the timeout period specified by the HealthCheckConnectTimeout parameter is ignored and the period of time specified by the HealthCheckInterval parameter is used as the timeout period.
100
HealthCheckConnectPortintegerNo

The port that is used for health checks.

Valid values: 1 to 65535.

80
HealthCheckIntervalintegerNo

The interval at which health checks are performed. Unit: seconds.

Valid values: 1 to 50.

5
healthCheckReqstringNo

The request string for UDP listener health checks. The string must be 1 to 64 characters in length and can contain only letters and digits.

hello
healthCheckExpstringNo

The response string for UDP listener health checks. The string must be 1 to 64 characters in length and can contain only letters and digits.

ok
VServerGroupstringNo

Specifies whether to use a vServer group. Valid values:

  • on: yes
  • off: no
Note You cannot set both VserverGroup and MasterSlaveServerGroup to on.
on
VServerGroupIdstringNo

The ID of the vServer group.

rsp-cige6****
MasterSlaveServerGroupIdstringNo

The ID of the primary/secondary server group.

Note You cannot specify both VServerGroupId and MasterSlaveServerGroupId.
rsp-0bfuc****
MasterSlaveServerGroupstringNo

Specifies whether to use a primary/secondary server group. Valid values:

  • on: yes
  • off: no
Note You cannot set VserverGroup and MasterSlaveServerGroup both to on.
on
AclIdstringNo

The ID of the network access control list (ACL) that is associated with the listener.

Note If AclStatus is set to on, this parameter is required.
off
AclTypestringNo

The type of the network ACL. Valid values:

  • white: a whitelist. Only requests from the IP addresses or CIDR blocks in the network ACL are forwarded. Whitelists apply to scenarios where you want to allow only specific IP addresses to access an application. Your service may be adversely affected if the whitelist is not properly configured. After a whitelist is configured, only requests from IP addresses that are added to the whitelist are forwarded by the listener.

    If you enable a whitelist but do not add an IP address to the ACL, the listener forwards all requests.

  • black: a blacklist. All requests from the IP addresses or CIDR blocks in the network ACL are denied. Blacklists apply to scenarios where you want to block access from specified IP addresses to an application.

    If a blacklist is configured for a listener but no IP address is added to the blacklist, the listener forwards all requests.

Note If AclStatus is set to on, this parameter is required.
white
AclStatusstringNo

Specifies whether to enable access control. Valid values:

  • on: yes
  • off: no
off
DescriptionstringNo

The name of the listener.

The name must be 1 to 256 characters in length and can contain letters, digits, hyphens (-), forward slashes (/), periods (.), and underscores (_).

udp_80
ProxyProtocolV2EnabledbooleanNo

Specifies whether to use the Proxy protocol to pass client IP addresses to backend servers. Valid values:

  • true: yes
  • false (default): no
false
HealthCheckSwitchstringNo

Specifies whether to enable the health check feature. Valid values:

  • on (default): yes
  • off: no
on

Response parameters

ParameterTypeDescriptionExample
object
RequestIdstring

The ID of the request.

CEF72CEB-54B6-4AE8-B225-F876FF7BA984

Examples

Sample success responses

JSONformat

{
  "RequestId": "CEF72CEB-54B6-4AE8-B225-F876FF7BA984"
}

Error codes

HTTP status codeError codeError message
400InvalidParameterValue.SpecNotSupportThe loadBalancer of shared spec does not support the parameter value, %s.
400OperationNotSupport.AclThe cloud box instance does not support acl.
400InvalidParameterValue.RegionNotSupportThe region does not support the parameter value, %s.
400IpVersionConflictThe ip version of this LoadBalancer and the Acl is conflict.
400InvalidParameterValue.ZoneNotSupportThe zone does not support the parameter value, %s.
400OperationFailed.ServerGroupInUseThe VServerGroup or MasterSlaveServerGroup can not be close for this listener.
400InvalidParam.VServerGroupIdThe specified VServerGroupId is invalid.
400MissingParam.HealthCheckConnectPortThe parameter HealthCheckConnectPort is required.
400InvalidParam.ListenerPortThe specified ListenerPort is invalid.
400InvalidParam.StartPortThe specified StartPort is invalid.
400InvalidParamSize.PortRangeThe size of param PortRange is invalid.
400InvalidParam.EndPortThe specified EndPort is invalid.
400InvalidParam.PortRangeThe specified PortRange is invalid.
400QuotaLimitExceeds.AclAttachedToListener%s.
400QuotaLimitExceeds.TotalAclEntry%s.
400AclListenerOverLimit%s.
400Duplicated.AclEntry%s.
400InvalidParamLength.HealthCheckReqThe length of the parameter HealthCheckReq is invalid.
400InvalidParamLength.HealthCheckExpThe length of the parameter HealthCheckExp is invalid.
400InvalidParam.HealthCheckReqThe param HealthCheckReq is invalid.
400InvalidParam.HealthCheckExpThe param HealthCheckExp is invalid.
400ResourceNotFound.VServerGroup%s.
400IllegalParam.FailoverThresholdThe parameter FailoverThreshold is illegal.
400IllegalParam.FailoverStrategyThe parameter FailoverStrategy is illegal.
400InvalidParameter.ZoneNotSupportThe zone does not support the parameter %s.
400MasterSlaveServerConflictThe servers are conflict for MasterSlaveGroup.
400MissingParam.VServerGroupIdThe parameter VServerGroupId is missing.
400VipNotSupportQuicVersionThe listener does not support the parameter of QuicVersion.
400IllegalParam.HealthCheckTypeThe param of HealthCheckType is illegal.
400IllegalParam.HealthCheckMethodThe param of HealthCheckMethod is illegal.
400IllegalParam.HealthCheckThe param of HealthCheck is illegal.
400OperationDenied.MasterSlaveGroupLogEnabledThe operation is denied because of MasterSlaveGroupLogEnabled.
400OperationDenied.OnlyIpv4SlbSupportThe operation is not allowed because of OnlyIpv4SlbSupport.
400OperationDenied.FullNatModeNotAllowedThe operation is not allowed because of FullNatModeNotAllowed.
400SpecNotSupportParameterThe instance with share spec does not support FullNatEnabled parameter.

For a list of error codes, visit the Service error codes.

Change history

Change timeSummary of changesOperation
2023-09-08The Error code has changedView Change Details