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    Resource Orchestration Service:DATASOURCE::SLB::Rules

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    Resource Orchestration Service:DATASOURCE::SLB::Rules

    Last Updated:Jun 18, 2026

    Queries the forwarding rules configured for a specified listener.

    Syntax

    {
  "Type": "DATASOURCE::SLB::Rules",
  "Properties": {
    "ListenerPort": String,
    "LoadBalancerId": String,
    "ListenerProtocol": String,
    "RefreshOptions": String
  }
}

    Properties

    Property

    Type

    Required

    Editable

    Description

    Constraint

    ListenerPort

    String

    Yes

    Yes

    The frontend listening port of the Server Load Balancer (SLB) instance.

    Valid values: 1 to 65535.

    LoadBalancerId

    String

    Yes

    Yes

    The ID of the SLB instance.

    None.

    ListenerProtocol

    String

    No

    Yes

    The frontend protocol of the SLB instance.

    This property must be specified when listeners that use different protocols listen on the same port.

    RefreshOptions

    String

    No

    Yes

    The refresh policy for data source resources when the stack is updated.

    Valid values:

    • Never (default): does not refresh data source resources when the stack is updated.

    • Always: refreshes data source resources when the stack is updated.

    Return values

    Fn::GetAtt

    • RuleIds: the IDs of the forwarding rules.

    • Rules: details of the forwarding rules.

    Property

    Type

    Description

    Constraint

    RuleIds

    List

    The IDs of the forwarding rules.

    None.

    Rules

    List

    Details of the forwarding rules.

    None.

    HealthCheckHttpCode

    String

    The HTTP status codes for a successful health check.

    Separate multiple HTTP status codes with commas (,).

    Valid values:

    • http_2xx (default)

    • http_3xx

    • http_4xx

    • http_5xx

    Note

    This property takes effect only when HealthCheck is set to on.

    HealthCheckUri

    String

    The URI used for health checks.
    Note

    This property takes effect only when HealthCheck is set to on.

    CookieTimeout

    String

    The timeout period of the cookie.

    Valid values: 1 to 86400.

    Unit: seconds.

    Note

    This property takes effect only when StickySession is set to on and StickySessionType is set to insert.

    RuleId

    String

    The ID of the forwarding rule.

    None.

    Url

    String

    The request path specified in the forwarding rule.

    None.

    ListenerProtocol

    String

    The frontend protocol of the SLB instance.

    None.

    HealthCheckTimeout

    Integer

    The timeout period of a health check response.

    If a backend Elastic Compute Service (ECS) instance does not return a health check response within the specified timeout period, the instance fails the health check.

    Valid values: 1 to 300.

    Unit: seconds.

    Note

    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.

    This property takes effect only when HealthCheck is set to on.

    HealthCheck

    String

    Whether the health check feature is enabled.

    Valid values:

    • on

    • off

    Note

    This property takes effect only when ListenerSync is set to off. If you set ListenerSync to on, the health check configuration of the listener is used.

    ListenerSync

    String

    Whether the forwarding rule uses the scheduling algorithm, session persistence, and health check configurations of the listener.

    Valid values:

    • on: The forwarding rule uses the configurations of the listener.

    • off: The forwarding rule does not use the configurations of the listener. You can specify health check and session persistence configurations for the forwarding rule.

    UnhealthyThreshold

    Integer

    The number of consecutive health check failures required before a healthy backend server is declared unhealthy.

    Valid values: 2 to 10.

    Note

    This property takes effect only when HealthCheck is set to on.

    HealthyThreshold

    Integer

    The number of consecutive health check successes required before an unhealthy backend server is declared healthy.

    Valid values: 2 to 10.

    Note

    This property takes effect when HealthCheck is set to on.

    HealthCheckInterval

    Integer

    The interval between two consecutive health checks.

    Valid values: 1 to 50.

    Unit: seconds.

    Note

    This property takes effect only when HealthCheck is set to on.

    HealthCheckConnectPort

    Integer

    The port used for health checks on backend servers.

    Valid values: 1 to 65535.

    Note

    This property takes effect only when HealthCheck is set to on. If you leave HealthCheckConnectPort empty and set HealthCheck to on, the backend port configuration of the listener is used by default.

    Cookie

    String

    The cookie configured on the backend server.

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

    Note

    This property takes effect only when StickySession is set to on and StickySessionType is set to server.

    VServerGroupId

    String

    The ID of the vServer group associated with the forwarding rule.

    None.

    Scheduler

    String

    The scheduling algorithm.

    Valid values:

    • wrr (default): Backend servers that have higher weights receive more requests than backend servers that have lower weights.

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

    Note

    This property takes effect only when ListenerSync is set to off. If you set ListenerSync to on, the scheduling algorithm configuration of the listener is used.

    RuleName

    String

    The name of the forwarding rule.

    The name must be 1 to 80 characters in length and can contain letters, digits, hyphens (-), forward slashes (/), periods (.), and underscores (_).

    Note

    Forwarding rule names must be unique within a listener.

    Domain

    String

    The domain name specified in the forwarding rule.

    None.

    StickySession

    String

    Whether session persistence is enabled.

    Valid values:

    • on

    • off

    Note

    • This property takes effect only when ListenerSync is set to off.

    • If you set ListenerSync to on, the session persistence configuration of the listener is used.

    StickySessionType

    String

    The method used to handle a cookie.

    Valid values:

    • insert: inserts a cookie. SLB inserts the SERVERID cookie into the first HTTP or HTTPS response packet that is sent to a client. The next request from the client carries the cookie, and SLB forwards this request to the recorded backend server.

    • server: rewrites a cookie. When SLB detects a user-defined cookie, SLB overwrites the original cookie with the user-defined cookie. The next request from the client carries the user-defined cookie, and SLB forwards this request to the recorded backend server.

    Note

    This property takes effect only when StickySession is set to on.

    HealthCheckDomain

    String

    The domain name used for health checks.

    Valid values:

    • $_ip: the private IP address of the backend server. If you set this property to $_ip or leave this property empty, SLB uses the private IP address of each backend server as the domain name for health checks.

    • domain: a domain name. The domain name must be 1 to 80 characters in length and can contain letters, digits, periods (.), and hyphens (-).

    Note

    This property takes effect only when HealthCheck is set to on.

    Examples

    ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  LoadBalancerId:
    Type: String
    AssociationProperty: ALIYUN::SLB::Instance::InstanceId
    Description: The ID of the CLB instance.
Resources:
  ExtensionDataSource:
    Type: DATASOURCE::SLB::Rules
    Properties:
      ListenerPort: 3443
      LoadBalancerId:
        Ref: LoadBalancerId
Outputs:
  RuleIds:
    Description: The list of rule IDs.
    Value:
      Fn::GetAtt:
        - ExtensionDataSource
        - RuleIds
  Rules:
    Description: The list of rules.
    Value:
      Fn::GetAtt:
        - ExtensionDataSource
        - Rules
    {
  "ROSTemplateFormatVersion": "2015-09-01",
  "Parameters": {
    "LoadBalancerId": {
      "Type": "String",
      "AssociationProperty":"ALIYUN::SLB::Instance::InstanceId",
      "Description": "The ID of the CLB instance."
    }
  },
  "Resources": {
    "ExtensionDataSource": {
      "Type": "DATASOURCE::SLB::Rules",
      "Properties": {
        "ListenerPort": 3443,
        "LoadBalancerId": {
          "Ref": "LoadBalancerId"
        }
      }
    }
  },
  "Outputs": {
    "RuleIds": {
      "Description": "The list of rule IDs.",
      "Value": {
        "Fn::GetAtt": [
          "ExtensionDataSource",
          "RuleIds"
        ]
      }
    },
    "Rules": {
      "Description": "The list of rules.",
      "Value": {
        "Fn::GetAtt": [
          "ExtensionDataSource",
          "Rules"
        ]
      }
    }
  }
}