Describe the forwarding rules of application load balancing - DescribeRules

Overview

Describe a specified forwarding rule or all forwarding rules under an application-type load balancer listener

💡 The Weight of the default rule stays in sync with the actual Weight of the target.

Definition

Public Parameters

Parameter Name	Type	Description Information	Required
Action	string	Corresponding API command name, the current API is `DescribeRules`.	Yes
PublicKey	string	The user’s public key can be obtained from Console	Yes
Signature	string	User signature generated based on public key and API command, see Signature Algorithm	Yes

Request Parameters

Parameter Name	Type	Description Information	Required
Region	string	Region. See List of Regions and Availability Zones	Yes
ProjectId	string	Project ID. If not filled in, the default project is used, sub-accounts must be filled in. Please refer to the GetProjectList interface.	Yes
LoadBalancerId	string	ID of the Application Load Balancer Instance	Yes
ListenerId	string	Listener’s ID	Yes
RuleId	string	The ID of the application load balancing forwarding rule. If RuleId is specified, only this rule will be described.	No

Response Field

Field Name	Type	Description Information	Required
RetCode	int	Return status code. If it is 0, it means successful return. If it is not 0, it means failure.	Yes
Action	string	Operation command name.	Yes
Message	string	Returns an error message, providing detailed description when `RetCode` is non-zero.	No
Rules	array[Rule]	Forwarding Rule Information	Yes

Data Model

Rule

Field Name	Type	Description Information	Required
RuleId	string	ID of the forwarding rule	No
RuleConditions	array[RuleCondition]	Forwarding rule matching conditions. See RuleCondition for specific structure.	No
RuleActions	array[RuleAction]	Forwarding action. For specific rules, see RuleAction.	No
IsDefault	boolean	Is it the default forwarding rule?	No
Pass	boolean	When the service node for forwarding is empty, should the rule be ignored?	No

RuleCondition

Field Name	Type	Description Information	Required
Type	string	Match condition type. Limited enumeration values: Host, Path	Yes
HostConfig	HostConfigSet	Domain-related configuration. Required when Type is Host. See HostConfigSet for specific structure.	No
PathConfig	PathConfigSet	Configuration related to the path. Required when Type is Path. For detailed structure, see PathConfigSet.	No

RuleAction

Field Name	Type	Description Information	Required
Type	string	Action type. Limited enumeration values: Forward, “InsertHeader”, “Cors”, “FixedResponse”, “RemoveHeader”	Yes
ForwardConfig	ForwardConfigSet	Forward service node related configuration, corresponding to type value: “Forward”. For specific structure, see ForwardConfigSet.	No
FixedResponseConfig	FixedResponseConfigSet	Static return related configuration, corresponding to type value: “FixedResponse”. For specific structure, see FixedResponseConfigSet	No
InsertHeaderConfig	InsertHeaderConfigSet	Insert header-related configuration, corresponding to the type value: “InsertHeader”. For the specific structure, see InsertHeaderConfigSet.	No
CorsConfig	CorsConfigSet	Configuration related to cross-domain, corresponding to type value: “Cors”. For specific structure, see CorsConfigSet.	No
RemoveHeaderConfig	RemoveHeaderConfigSet	Delete header-related configuration, corresponding type value: “RemoveHeader”. For specific structure, see RemoveHeaderConfigSet	No
Order	int	The execution order of forwarding rule actions ranges from 1 to 1000, with actions executed from smallest to largest value. The value cannot be empty or duplicated. Forward and FixedResponse types of actions do not consider Order and are executed last.	No

ForwardConfigSet

Field Name	Type	Description Information	Required
Targets	array[ForwardTargetSet]	The backend service nodes to be forwarded. It is limited to the service node pool of the listener; the array length can be 0. See ForwardTargetSet for detailed structure.	Yes

FixedResponseConfigSet

Field Name	Type	Description Information	Required
HttpCode	int	Returned HTTP response codes, only supporting 2xx, 4xx, 5xx numbers, where x is any digit.	Yes
Content	string	Returned fixed content. Supports storing up to 1 KB, only supports printable characters within the ASCII code range ch >= 32 && ch < 127, excluding $.	No

InsertHeaderConfigSet

Field Name	Type	Description Information	Required
Key	string	The inserted header field name must be 1 to 40 characters long and can include uppercase and lowercase letters a-z, numbers, underscores (_), and hyphens (-). The header field name cannot be reused in InsertHeader. The header field cannot use the following (case insensitive): x-real-ip, x-forwarded-for, x-forwarded-proto, x-forwarded-srcport, ucloud-alb-trace, connection, upgrade, content-length, transfer-encoding, keep-alive, te, host, cookie, remoteip, authority.	Yes
Value	string	Inserted header field content. When ValueType is SystemDefined, the values are as follows: ClientSrcPort: Client port. ClientSrcIp: Client IP address. Protocol: Protocol of the client’s request (HTTP or HTTPS). RuleID: ID of the forwarding rule hit by the client’s request. ALBID: ALB ID. ALBPort: ALB port. When ValueType is UserDefined: You can customize the header field content, with a length limit of 1~128 characters, supporting printable characters in the ASCII range ch >= 32 && ch < 127, excluding $. When ValueType is ReferenceHeader: You can reference a specific field from the request header, with a length limit of 1~128 characters, supporting lowercase letters a~z, numbers, hyphens (-), and underscores (_).	Yes
ValueType	string	Header field content type. Values: UserDefined: User specified. ReferenceHeader: Referencing a field from the user’s request header. SystemDefined: System defined.	Yes

CorsConfigSet

Field Name	Type	Description Information	Required
AllowOrigin	array[string]	Allowed access source list. Supports configuring only one element , or configuring one or more values. A single value must start with http:// or https://, followed by a correct domain name or a first-level wildcard domain. (Example: http://.test.abc.example.com) A single value can be without a port or specify a port, with a port range: 1~65535. Supports up to 5 values.	Yes
AllowHeaders	array[string]	List of Headers allowed for cross-origin. Supports configuration as * or one or more value entries. A single value entry can only contain uppercase and lowercase letters, numbers, and cannot start or end with an underscore (_) or hyphen (-), with a maximum length limit of 32 characters. Supports up to 20 values.	No
ExposeHeaders	array[string]	List of allowed exposed Headers. Supports configuration as * or one or more value entries. A single value entry can only contain uppercase and lowercase letters, numbers, and cannot start or end with an underscore (_) or hyphen (-), with a maximum length of 32 characters. Supports up to 20 values.	No
AllowMethods	array[string]	Select the allowed HTTP methods for cross-domain access. Values: GET POST PUT DELETE HEAD OPTIONS PATCH	No
AllowCredentials	string	Allow carrying credential information. Values: on: Yes. off: No.	No
MaxAge	int	The maximum cache time for preflight requests in the browser, in seconds. Value range: -1~172800.	No

RemoveHeaderConfigSet

Field Name	Type	Description Information	Required
Key	string	The names of the header fields to be deleted, currently only the following default configured fields can be deleted: X-Real-IP, X-Forwarded-For, X-Forwarded-Proto, X-Forwarded-SrcPort	Yes

ForwardTargetSet

Field Name	Type	Description Information	Required
Id	string	Identification ID of the service node	Yes
Weight	int	Weight. Only valid when the load balancing algorithm of the listener is weighted round robin; Value range [1-100], default value is 1.	No

HostConfigSet

Field Name	Type	Description Information	Required
Values	array[string]	Value. Currently only supports an array length of 1; The value must meet the conditions of the relevant matching method.	Yes
MatchMode	string	Matching method. Limited enumeration values: Regular-Regular, Wildcard-Wildcard domain; Default value: Regular.	No

PathConfigSet

Field Name	Type	Description Information	Required
Values	array[string]	Value. Currently only supports an array length of 1; The value must meet the conditions of the relevant matching method.	Yes

Example

Request Example


https://api.genesissai.com/?Action=DescribeRules
&Region=cn-zj
&ProjectId=AONmKvcb
&LoadBalancerId=cCWlIOts
&ListenerId=NmxHLcXL
&RuleId=vNcPniOK

Response Example


{
  "Action": "DescribeRulesResponse",
  "RetCode": 0,
  "Rules": [
    {
      "IsDefault": true,
      "Pass": false,
      "RuleActions": [
        {
          "InsertHeaderConfig": {
            "Key": "test1",
            "Value": "ClientSrcPort",
            "ValueType": "SystemDefined"
          },
          "Order": 1,
          "Type": "InsertHeader"
        },
        {
          "InsertHeaderConfig": {
            "Key": "test2",
            "Value": "test2",
            "ValueType": "UserDefined"
          },
          "Order": 2,
          "Type": "InsertHeader"
        },
        {
          "InsertHeaderConfig": {
            "Key": "test3",
            "Value": "test3",
            "ValueType": "UserDefined"
          },
          "Order": 3,
          "Type": "InsertHeader"
        },
        {
          "Order": 4,
          "RemoveHeaderConfig": {
            "Key": "X-Forwarded-Proto"
          },
          "Type": "RemoveHeader"
        },
        {
          "CorsConfig": {
            "AllowCredentials": "on",
            "AllowHeaders": [
              "Origin",
              "Accept",
              "Accept"
            ],
            "AllowMethods": [
              "OPTIONS",
              "HEAD",
              "GET",
              "POST",
              "PUT",
              "PATCH"
            ],
            "AllowOrigin": [
              "http://example.com",
              "http://example.com",
              "https://example.com:123",
              "https://example.com:12313"
            ],
            "ExposeHeaders": [
              "User-Agent",
              "Cache-Control"
            ],
            "MaxAge": -1
          },
          "Order": 5,
          "Type": "Cors"
        },
        {
          "ForwardConfig": {
            "Targets": [
              {
                "Id": "ars-XXXXX",
                "Weight": 1
              }
            ]
          },
          "Type": "Forward"
        }
      ],
      "RuleConditions": [
        {
          "HostConfig": {},
          "PathConfig": {},
          "Type": "cn-zj"
        }
      ],
      "RuleId": "GHOQYSjh"
    }
  ]
}