Use CreateLoadBalancerHTTPListener to create an HTTP listener - ENS

Creates an HTTP listener.

Operation description

up to 100 times per second per account.
up to 10 times per second per user.

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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

ens:CreateLoadBalancerHTTPListener

create

*All Resource

*

None

Request parameters

Parameter	Type	Required	Description	Example
LoadBalancerId	string	Yes	The ID of the Edge Load Balancer (ELB) instance.	lb-5s7crik3yo3bp03gqrbp5****
ListenerPort	integer	Yes	The listener port that is used by Edge Load Balancer (ELB) to receive requests and forward the requests to backend servers. Valid values: 1 to 65535. Note We recommend that you use port 80 for HTTP.	8080
ListenerForward	string	No	Specifies whether to enable redirection from HTTP to HTTPS. Valid values: on off (default)	off
ForwardPort	integer	No	The listener port that is used to redirect HTTP requests to HTTPS.	0
Description	string	No	The name of the listener. The value must be 1 to 80 characters in length. Note The value cannot start with `http://` or `https://`.	Listener description
XForwardedFor	string	No	Specifies whether to use the X-Forwarded-For header to obtain the real IP address of the client. Valid values: on off (default)	off
Scheduler	string	No	The scheduling algorithm. Valid values: wrr (default): Backend servers with higher weights receive more requests than backend servers with lower weights. wlc: Requests are distributed based on the weights and number of connections to backend servers. If two backend servers have the same weight, the backend server that has fewer connections receives more requests. rr: Requests are distributed to backend servers in sequence. sch: consistent hashing based on source IP addresses. Requests from the same source IP address are distributed to the same backend server. qch: consistent hashing based on QUIC connection IDs (CIDs). Requests that contain the same QUIC CID are distributed to the same backend server. iqch: consistent hashing based on three specific bytes of iQUIC CIDs. Requests with the same second, third, and fourth bytes are distributed to the same backend server.	wrr
HealthCheck	string	Yes	Specifies whether to enable the health check feature. Valid values: on off (default)	on
HealthCheckDomain	string	No	The domain name that you want to use for health checks. Note This parameter takes effect only if you set HealthCheck to on.	www.aliyundoc.com
HealthCheckURI	string	No	The URI used for health checks. The URI must be 1 to 80 characters in length. Note A URL must start with a forward slash (`/`) but cannot contain only forward slashes (`/`). This parameter takes effect only if the HealthCheck parameter is set to on.	/checkpreload.htm
HealthyThreshold	integer	No	The number of consecutive successful health checks that must occur before an unhealthy and inaccessible backend server is declared healthy and accessible. Valid values: 2 to 10. Default value: 3. Note This parameter takes effect only if you set HealthCheck to on.	3
UnhealthyThreshold	integer	No	The number of consecutive failed health checks that must occur before a healthy and accessible backend server is declared unhealthy and inaccessible. Valid values: 2 to 10. Default value: 3. Note This parameter takes effect only if you set HealthCheck to on.	3
HealthCheckTimeout	integer	No	The timeout period of a health check response. If a backend server does not respond within the specified timeout period, the server fails the health check. Default value: 5. Valid values: 1 to 300. Unit: seconds. Note This parameter takes effect only if the HealthCheck parameter is set to on. If the value of HealthCheckTimeout is smaller than the value of HealthCheckInterval, the timeout period specified by HealthCheckTimeout becomes invalid, and the value of HealthCheckInterval is used as the timeout period.	5
HealthCheckConnectPort	integer	No	The backend port that is used for health checks. Valid values: 1 to 65535. Note This parameter takes effect only if you set HealthCheck to on.	30040
HealthCheckInterval	integer	No	The interval at which health checks are performed. Valid values: 1 to 50. Default value: 2. Unit: seconds. Note This parameter takes effect only if you set HealthCheck to on.	2
HealthCheckHttpCode	string	No	The HTTP status code for a successful health check. Valid values: http_2xx (default) http_3xx http_4xx http_5xx Note This parameter takes effect only if you set HealthCheck to on.	http_2xx
IdleTimeout	integer	No	The timeout period for idle connections. Default value: 15. Valid values: 1 to 60. Unit: seconds. Note If no request is received within the specified timeout period, ELB closes the connection. When a request is received, ELB creates a new connection.	15
RequestTimeout	integer	No	The timeout period of a request. Default value: 60. Valid values: 1 to 180. Unit: seconds. Note If no response is received from the backend server within the specified timeout period, ALB returns an HTTP 504 error code to the client.	60
HealthCheckMethod	string	No	The HTTP request method for health checks. Valid values: head (default) get Note This parameter takes effect only if the HealthCheck parameter is set to on.	head
BackendServerPort	integer	No	The port used by the backend server of the ELB instance. Valid values: 1 to 65535.	8080

Response elements

Element	Type	Description	Example
	object	Schema of Response
RequestId	string	The ID of the request.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E

Examples

Success response

JSON format

{
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E"
}

Error codes

HTTP status code	Error code	Error message	Description
400	ens.interface.error	An error occurred while call the API.
400	Invalid%s	The specified parameter %s is invalid.
400	Missing%s	You must specify the parameter %s.
400	LoadBalancerNotFound	The input parameter loadBalancerId that is not found.
400	IncorrectInstanceStatus	The current status of the resource does not support this operation.	The current operation is not supported. The disk is being reset.
400	ListenerAlreadyExists	The listenerPort already exists.	Listener already exists
400	NoPermission	Permission denied.
400	InvalidParameter.%s	The specified field %s invalid. Please check it again.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.