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Enterprise Distributed Application Service:UpdateApplicationScalingRule

Last Updated:Jan 08, 2024

Modifies an auto scaling policy for an application.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer.

Debug

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.
OperationAccess levelResource typeCondition keyAssociated operation
edas:ManageApplicationWrite
  • Application
    acs:edas:{#regionId}:{#accountId}:namespace/{#NameSpaceId}/application/{#AppId}
    none
none

Request syntax

PUT /pop/v1/eam/scale/application_scaling_rule

Request parameters

ParameterTypeRequiredDescriptionExample
AppIdstringNo

The ID of the application. You can call the ListApplication operation to query the application ID. For more information, see ListApplication .

78194c76-3dca-418e-a263-cccd1ab4****
ScalingRuleNamestringNo

The name of the auto scaling policy.

cpu-trigger
ScalingRuleTypestringNo

The type of the auto scaling policy.

  • Set the value to trigger.
trigger
ScalingRuleEnablebooleanNo

Specifies whether to enable the auto scaling policy. Valid values:

  • true: enables the auto scaling policy.
  • false: disables the auto scaling policy.
true
ScalingRuleMetricstringNo

This parameter is deprecated.

1
ScalingRuleTimerstringNo

This parameter is deprecated.

1
ScalingRuleTriggerstringNo

The trigger policy for the auto scaling policy. Set this parameter in the JSON format by using the ScalingRuleTriggerDTO class. For more information, see Additional description of request parameters.

ScalingRuleTriggerDTO{......}
ScalingBehaviourstringNo

The behavior of the auto scaling. See the example for the data structure.

{"scaleUp":{"stabilizationWindowSeconds":"0","selectPolicy":"Max","policies":[{"type":"Pods","value":5,"periodSeconds":15}]},"scaleDown":{"stabilizationWindowSeconds":"300","selectPolicy":"Max","policies":[{"type":"Percent","value":200,"periodSeconds":15}]}}

Additional description of request parameters

public class ScalingRuleTriggerDTO {
    /**
     * The maximum number of replicas. The maximum value is 1000. 
     */
    Integer maxReplicas;
    /**
     * The minimum number of replicas. The minimum value is 0. 
     */
    Integer minReplicas;

    /**
     * The list of triggers. Multiple triggers are supported. 
     */
    List<Trigger> triggers;

    @Data
    @ToString
    @Builder
    @AllArgsConstructor
    @NoArgsConstructor
    public static class Trigger {
        /**
         * The type of the trigger. Valid values: cron and app_metric. 
         */
        String type;

        /**
         * The name of the trigger. The name must start with a letter, and can contain digits, letters, hyphens (-), and underscores (_). The name can be up to 30 characters in length. 
         */
        String name;

        /**
          The metadata of the trigger. Set this parameter to a JSON string that consists of key-value pairs. The metadata varies based on the trigger type. 
          1. cron
           {"period":"weekly","dryRun":"false","timerInDay":[{"atTime":"08:00","targetReplicas":2},{"atTime":"20:00","targetReplicas":1}],"timerInWeek":["Sat","Thu"]}
          * period: the scaling cycle. Valid values: daily, weekly, and monthly. 
          * dryRun: Value false indicates observation and scaling. Value true indicates observation only. 
          * timerInDay: the daily scaling cycle, which specifies the number of replicas to be maintained from a specific point in time. 
         * timerInWeek: the day of the week in the CRON expression. Example: Fri. 

         2. app_metric
         {\"metricName\":\"arms_appstat.incall_QPS\",\"dryRun\":\"false\",\"targetValAvg\":\"true\",\"targetAverageValue\":\"100\"}
         
         * metricName: the name of the metric. Valid values:
              * arms_appstat.incall_QPS: the queries per second (QPS).
              * arms_appstat.incall_rt: the response time (RT).
              * arms_appstat.system_CPU: the CPU utilization.
              * arms_appstat.system_MEM: the memory usage.
         * dryRun: Value false indicates observation and scaling. Value true indicates observation only. 
        * targetValAvg: Value true indicates that the target value is an average value. Value false indicates that the target value is not an average value. Set this parameter to true only for the arms_appstat.incall_QPS metric. 
        * targetAverageValue or targetValue: Specify the targetAverageValue parameter if the targetValAvg parameter is set to true. Specify the targetValue parameter if the targetValAvg parameter is set to false. 
        */
        String metadata;
    }
}

Response parameters

ParameterTypeDescriptionExample
object
Codeinteger

The HTTP status code that is returned.

200
Messagestring

The message that is returned.

success
RequestIdstring

The ID of the request.

a5281053-08e4-47a5-b2ab-5c0323de7b5a
AppScalingRuleobject

The information about the auto scaling policy.

UpdateTimelong

The time when the auto scaling policy was last modified. This value is a UNIX timestamp representing the number of milliseconds that have elapsed since January 1, 1970, 00:00:00 UTC.

1574251601785
CreateTimelong

The time when the auto scaling policy was created. This value is a UNIX timestamp representing the number of milliseconds that have elapsed since January 1, 1970, 00:00:00 UTC.

1574251601785
AppIdstring

The ID of the application to which the auto scaling policy belongs.

78194c76-3dca-418e-a263-cccd1ab4****
LastDisableTimelong

The time when the auto scaling policy was last disabled. This value is a UNIX timestamp representing the number of milliseconds that have elapsed since January 1, 1970, 00:00:00 UTC.

1574251601785
MaxReplicasinteger

This parameter is deprecated.

1
ScaleRuleEnabledboolean

Indicates whether the auto scaling policy is enabled. Valid values:

  • true: The auto scaling policy is enabled.
  • false: The auto scaling policy is disabled.
true
ScaleRuleTypestring

The type of the auto scaling policy. The value is fixed to trigger.

trigger
MinReplicasinteger

This parameter is deprecated.

1
ScaleRuleNamestring

The name of the auto scaling policy.

cpu-trigger
Metricobject

This parameter is deprecated.

MinReplicasinteger

This parameter is deprecated.

1
MaxReplicasinteger

This parameter is deprecated.

1
Metricsobject []

This parameter is deprecated.

MetricTargetAverageUtilizationinteger

This parameter is deprecated.

1
MetricTypestring

This parameter is deprecated.

cpu
Triggerobject

The configurations of the trigger.

MinReplicasinteger

The minimum number of replicas. The minimum value is 0.

1
MaxReplicasinteger

The maximum number of replicas. The maximum value is 1000.

122
Triggersobject []

The configurations of the trigger.

Typestring

The type of the trigger. Valid values: cron and app_metric.

cron
MetaDatastring

The metadata of the trigger.

{"dryRun":true}
Namestring

The name of the trigger.

cpu
Behaviourobject
ScaleUpobject
StabilizationWindowSecondsinteger

The cooldown time of the scale-out. Valid values: 0 to 3600. Unit: seconds. Default value: 0.

0
SelectPolicystring

The step size policy for the scale-out. Valid values: Max, Min, and Disable.

Max
Policiesobject []

The configuration of the policy.

PeriodSecondsinteger

The cycle of the policy check. Valid values: 0 to 1800. Unit: seconds.

15
Typestring

The type of the policy. Valid values: Pods and Percent.

Pods
Valuestring

The policy value of auto scaling. Set the value to an integer greater than zero. If the policy type is Pods, the value of this parameter indicates the number of pods. If the policy type is Percent, the value of this parameter indicates a percentage, which can exceed 100%.

10
ScaleDownobject
StabilizationWindowSecondsinteger

The cooldown time of the scale-in. Valid values: 0 to 3600. Unit: seconds. Default value: 300.

300
SelectPolicystring

The step size policy for the scale-in. Valid values: Max, Min, and Disable.

Max
Policiesobject []

The configuration of the policy.

PeriodSecondsinteger

The cycle of the policy check. Valid values: 0 to 1800. Unit: seconds.

15
Typestring

The type of the policy. Valid values: Pods and Percent.

Pods
Valuestring

The policy value of auto scaling. Set the value to an integer greater than zero. If the policy type is Pods, the value of this parameter indicates the number of pods. If the policy type is Percent, the value of this parameter indicates a percentage, which can exceed 100%.

10

Examples

Sample success responses

JSONformat

{
  "Code": 200,
  "Message": "success",
  "RequestId": "a5281053-08e4-47a5-b2ab-5c0323de7b5a",
  "AppScalingRule": {
    "UpdateTime": 1574251601785,
    "CreateTime": 1574251601785,
    "AppId": "78194c76-3dca-418e-a263-cccd1ab4****",
    "LastDisableTime": 1574251601785,
    "MaxReplicas": 1,
    "ScaleRuleEnabled": true,
    "ScaleRuleType": "trigger",
    "MinReplicas": 1,
    "ScaleRuleName": "cpu-trigger",
    "Metric": {
      "MinReplicas": 1,
      "MaxReplicas": 1,
      "Metrics": [
        {
          "MetricTargetAverageUtilization": 1,
          "MetricType": "cpu"
        }
      ]
    },
    "Trigger": {
      "MinReplicas": 1,
      "MaxReplicas": 122,
      "Triggers": [
        {
          "Type": "cron",
          "MetaData": "{\"dryRun\":true}",
          "Name": "cpu"
        }
      ]
    },
    "Behaviour": {
      "ScaleUp": {
        "StabilizationWindowSeconds": 0,
        "SelectPolicy": "Max",
        "Policies": [
          {
            "PeriodSeconds": 15,
            "Type": "Pods",
            "Value": "10"
          }
        ]
      },
      "ScaleDown": {
        "StabilizationWindowSeconds": 300,
        "SelectPolicy": "Max",
        "Policies": [
          {
            "PeriodSeconds": 15,
            "Type": "Pods",
            "Value": "10"
          }
        ]
      }
    }
  }
}

Error codes

For a list of error codes, visit the Service error codes.