Adds backend servers.
Operation description
- You can call this operation up to 100 times per second.
- You can call this operation up to 10 times per second per account.
Debugging
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.
Operation | Access level | Resource type | Condition key | Associated operation |
---|---|---|---|---|
ens:AddBackendServers | create | *All Resources * |
| none |
Request parameters
Parameter | Type | Required | Description | Example |
---|---|---|---|---|
LoadBalancerId | string | Yes | The frontend port that is used by the Edge Load Balance (ELB) instance. Valid values: 1 to 65535. | lb-5qzdmxefgrpxd7oz2mefonvtx |
BackendServers | array<object> | Yes | The list of backend servers that you want to add to the Edge Load Balancer (ELB) instance. You can add up to 20 backend servers at a time. Note
Only Edge Node Service (ENS) instances that are in the running state can be added to the ELB instance as backend servers.
| |
object | Yes | The list of backend servers that you want to add to the ELB instance. You can add up to 20 backend servers at a time. Note
Only ENS instances that are in the running state can be added to the ELB instance as backend servers.
| ||
ServerId | string | Yes | The ID of the backend server. | i-5uf6dwyzch3wly790**** |
Weight | integer | No | The weight of the backend server. Default value: 100. Valid values: 0 to 100. Note
The value 0 indicates that requests are not forwarded to the backend server.
| 100 |
Type | string | No | The type of the backend server. Valid values:
| ens |
Ip | string | No | The IP address of the backend server. | 192.168.X.X |
Port | integer | No | The backend port that is used by the ELB instance. | 3309 |
Response parameters
Examples
Sample success responses
JSON
format
{
"RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E",
"BackendServers": {
"BackendServer": [
{
"ServerId": "i-5uf6hj58zvml4ali8****",
"Weight": 100,
"Type": "ens",
"Ip": "192.168.0.1",
"Port": 0
}
]
}
}
Error codes
HTTP status code | Error code | Error message | Description |
---|---|---|---|
400 | ens.interface.error | An error occurred while call the API. | - |
400 | LoadBalancerNotFound | The input parameter loadBalancerId that is not found. | The load balancing instance does not exist. |
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 | InstanceNotFound | The input parameter instanceId that is not found. | - |
400 | InvalidParameter.Mismatch | Specified loadbalancer and backendServer are not in the same network. | - |
400 | QuotaExceed.BackendServer | Backend servers quota exceeded in this loadbalancer. | - |
400 | Missing%s | You must specify the parameter %s. | - |
400 | Invalid%s | The specified parameter %s is invalid. | - |
400 | InstanceNotFound | The input parameter instancdId that is not found. | - |
400 | InvalidParameter.EniType | The type of eni is invalid | - |
400 | InvalidParameter.EniStatus | The status of eni is invalid | - |
400 | InvalidParameter.EniServiceManaged | The eni is managed by service | - |
400 | NoPermission | Permission denied. | - |
400 | InvalidParameter.%s | The specified field %s invalid. Please check it again. | - |
For a list of error codes, visit the Service error codes.
Change history
Change time | Summary of changes | Operation |
---|---|---|
2023-09-21 | The Error code has changed | View Change Details |