All Products
Search
Document Center

Serverless App Engine:DescribeApplicationSlbs

Last Updated:Apr 22, 2026

Queries the configurations of Server Load Balancer (SLB) instances for an application.

Try it now

Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

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

sae:DescribeApplicationSlbs

get

*All Resource

*

None None

Request syntax

GET /pop/v1/sam/app/slb HTTP/1.1

Request parameters

Parameter

Type

Required

Description

Example

AppId

string

Yes

The ID of the application.

017f39b8-dfa4-4e16-a84b-1dcee4b1****

Response elements

Element

Type

Description

Example

object

The returned data.

RequestId

string

The request ID.

91F93257-7A4A-4BD3-9A7E-2F6EAE6D****

Message

string

The returned message.

  • If the request is successful, success is returned.

  • If the request fails, a specific error code is returned.

success

TraceId

string

The trace ID that is used to query the details of a request.

0a98a02315955564772843261e****

Data

object

The returned result.

Intranet

array<object>

The configurations of the internal-facing SLB instance.

object

The details of the configuration of the internal-facing SLB instance.

HttpsCertId

string

The ID of the certificate for the HTTPS protocol.

1513561019707729_16f37aae5f3_-375882821_-169099****

Protocol

string

The supported protocol.

TCP

TargetPort

integer

The container port.

8080

Port

integer

The listening port of the SLB instance.

80

HttpsCaCertId

string

The ID of the CA certificate for the HTTPS protocol.

1513561019707729_16f37aae5f3_-375882821_-169099****

StickySession

boolean

Indicates whether session persistence is enabled.

false

StickySessionType

string

The cookie handling method. Valid values:

  • insert: inserts a cookie. When a client makes the first request, the SLB instance inserts a cookie into the response. The next request from the client contains the cookie, and the SLB instance forwards the request to the same backend server.

  • server: rewrites a cookie. When the SLB instance detects a user-defined cookie, it rewrites the cookie. The next request from the client contains the new cookie, and the SLB instance forwards the request to the same backend server.

Note

This parameter is required when StickySession is set to true.

insert

CookieTimeout

integer

The cookie timeout period. Unit: seconds. Valid values: 1 to 86400.

Note

This parameter is required when StickySession is set to true and StickySessionType is set to insert.

56

Cookie

string

The cookie that is configured on the server.

The cookie must be 1 to 200 characters in length and can contain only ASCII letters and digits. It cannot contain commas (,), semicolons (;), or spaces. It cannot start with a dollar sign ($).

Note

This parameter is required when StickySession is set to true and StickySessionType is set to server.

wwe

CreateTime

integer

The time when the rule was created. This value is a UNIX timestamp.

1741247308294

InternetIp

string

The public IP address.

59.74.**.**

InternetSlbId

string

The ID of the Internet-facing SLB instance.

lb-uf6xc7wybefehnv45****

Internet

array<object>

The configurations of the Internet-facing SLB instance.

object

The details of the configuration of the Internet-facing SLB instance.

HttpsCertId

string

The ID of the certificate for the HTTPS protocol.

1513561019707729_16f37aae5f3_-375882821_-169099****

Protocol

string

The supported protocol.

TCP

TargetPort

integer

The container port.

8080

Port

integer

The listening port of the SLB instance.

80

HttpsCaCertId

string

The ID of the CA certificate for the HTTPS protocol.

1513561019707729_16f37aae5f3_-375882821_-169099****

StickySession

boolean

Indicates whether session persistence is enabled.

false

StickySessionType

string

The cookie handling method. Valid values:

  • insert: inserts a cookie. When a client makes the first request, the SLB instance inserts a cookie into the response. The next request from the client contains the cookie, and the SLB instance forwards the request to the same backend server.

  • server: rewrites a cookie. When the SLB instance detects a user-defined cookie, it rewrites the cookie. The next request from the client contains the new cookie, and the SLB instance forwards the request to the same backend server.

Note

This parameter is required when StickySession is set to true.

insert

CookieTimeout

integer

The cookie timeout period. Unit: seconds. Valid values: 1 to 86400.

Note

This parameter is required when StickySession is set to true and StickySessionType is set to insert.

56

Cookie

string

The cookie that is configured on the server.

The cookie must be 1 to 200 characters in length and can contain only ASCII letters and digits. It cannot contain commas (,), semicolons (;), or spaces. It cannot start with a dollar sign ($).

Note

This parameter is required when StickySession is set to true and StickySessionType is set to server.

wwe

CreateTime

integer

The time when the rule was created. This value is a UNIX timestamp.

1741247308294

IntranetSlbId

string

The ID of the internal-facing SLB instance.

lb-uf6xc7wybefehnv45****

IntranetIp

string

The private IP address.

192.168.XX.XX

InternetSlbExpired

boolean

Indicates whether the Internet-facing SLB instance has expired.

false

IntranetSlbExpired

boolean

Indicates whether the internal-facing SLB instance has expired.

false

InternetSlbChargeType

string

The billing method of the Internet-facing SLB instance.

PayBySpec

IntranetSlbChargeType

string

The billing method of the internal-facing SLB instance.

PayBySpec

AppId

string

The application ID.

AppName

string

The application name.

ClusterId

string

The cluster ID.

ErrorCode

string

The error code.

  • This parameter is not returned if the request is successful.

  • This parameter is returned if the request fails. For more information, see the Error codes section in this topic.

Code

string

The HTTP status code. Valid values:

  • 2xx: The request is successful.

  • 3xx: The request is redirected.

  • 4xx: A client error occurs.

  • 5xx: A server error occurs.

200

Success

boolean

Indicates whether the configuration of the SLB instance was obtained. Valid values:

  • true: The configuration was obtained.

  • false: The configuration failed to be obtained.

true

Examples

Success response

JSON format

{
  "RequestId": "91F93257-7A4A-4BD3-9A7E-2F6EAE6D****",
  "Message": "success",
  "TraceId": "0a98a02315955564772843261e****",
  "Data": {
    "Intranet": [
      {
        "HttpsCertId": "1513561019707729_16f37aae5f3_-375882821_-169099****",
        "Protocol": "TCP",
        "TargetPort": 8080,
        "Port": 80,
        "HttpsCaCertId": "1513561019707729_16f37aae5f3_-375882821_-169099****",
        "StickySession": false,
        "StickySessionType": "insert",
        "CookieTimeout": 56,
        "Cookie": "wwe",
        "CreateTime": 1741247308294
      }
    ],
    "InternetIp": "59.74.**.**",
    "InternetSlbId": "lb-uf6xc7wybefehnv45****",
    "Internet": [
      {
        "HttpsCertId": "1513561019707729_16f37aae5f3_-375882821_-169099****",
        "Protocol": "TCP",
        "TargetPort": 8080,
        "Port": 80,
        "HttpsCaCertId": "1513561019707729_16f37aae5f3_-375882821_-169099****",
        "StickySession": false,
        "StickySessionType": "insert",
        "CookieTimeout": 56,
        "Cookie": "wwe",
        "CreateTime": 1741247308294
      }
    ],
    "IntranetSlbId": "lb-uf6xc7wybefehnv45****",
    "IntranetIp": "192.168.XX.XX",
    "InternetSlbExpired": false,
    "IntranetSlbExpired": false,
    "InternetSlbChargeType": "PayBySpec",
    "IntranetSlbChargeType": "PayBySpec",
    "AppId": "",
    "AppName": "",
    "ClusterId": ""
  },
  "ErrorCode": "",
  "Code": "200",
  "Success": true
}

Error codes

HTTP status code

Error code

Error message

Description

400 InvalidApplication.NotFound The current application does not exist.
400 InvalidParameter.NotEmpty You must specify the parameter %s.
400 InvalidParameter.Obviously The specified parameter is invalid {%s}.
400 InvalidParameter.WithMessage The parameter is invalid {%s}: %s

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.