GetAutoScalingPolicy - E-MapReduce - Alibaba Cloud Documentation Center

Debugging

You can run this interface directly in OpenAPI Explorer, saving you the trouble of calculating signatures. After running successfully, OpenAPI Explorer can automatically generate SDK code samples.

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.

Operation	Access level	Resource type	Condition key	Associated operation
emr:GetAutoScalingPolicy	get	All Resources *	none	none

Request parameters

Parameter	Type	Required	Description	Example
RegionId	string	Yes	The region ID.	cn-hangzhou
ClusterId	string	Yes	The cluster ID.	c-b933c5aac8fe****
NodeGroupId	string	Yes	The ID of the node group.	ng-869471354ecd****

Response parameters

Parameter	Type	Description	Example
	object	The response parameters.
ScalingPolicy	object	The information about the auto scaling policy.
NodeGroupId	string	The ID of the node group.	ng-869471354ecd****
ClusterId	string	The cluster ID.	c-b933c5aac8fe****
ScalingRules	array<object>	The auto scaling rules.
ScalingRuleDTO	object
RuleName	string	The name of the auto scaling rule.	scaling-out-memory
TriggerType	string	The type of the auto scaling rule. Valid values: TIME_TRIGGER: time-based scaling METRICS_TRIGGER: load-based scaling	TIME_TRIGGER
ActivityType	string	The scaling type. Valid values: SCALE_OUT SCALE_IN	SCALE_OUT
AdjustmentType	string	The adjustment type.	CHANGE_IN_CAPACITY
AdjustmentValue	integer	The adjustment value. The parameter value must be a positive integer, which indicates the number of instances that you want to add or remove.	100
TimeTrigger	TimeTrigger	The description of time-based scaling.
MetricsTrigger	MetricsTrigger	The description of load-based scaling.
ScalingPolicyId	string	The ID of the scaling policy.	asp-asduwe23znl***
Constraints	object	The maximum and minimum number of nodes in the node group.
MaxCapacity	integer	The maximum number of nodes in the node group. Default value: 2000.	2000
MinCapacity	integer	The minimum number of nodes in the node group. Default value: 0.	0
RequestId	string	The request ID.	DD6B1B2A-5837-5237-ABE4-FF0C8944****

Examples

Sample success responses

JSONformat

{
  "ScalingPolicy": {
    "NodeGroupId": "ng-869471354ecd****",
    "ClusterId": "c-b933c5aac8fe****",
    "ScalingRules": [
      {
        "RuleName": "scaling-out-memory",
        "TriggerType": "TIME_TRIGGER",
        "ActivityType": "SCALE_OUT",
        "AdjustmentType": "CHANGE_IN_CAPACITY",
        "AdjustmentValue": 100,
        "TimeTrigger": {
          "LaunchTime": "",
          "StartTime": 1639714800000,
          "EndTime": 1639714800000,
          "LaunchExpirationTime": 600,
          "RecurrenceType": "WEEKLY",
          "RecurrenceValue": "MON,FRI,SUN"
        },
        "MetricsTrigger": {
          "TimeWindow": 30,
          "EvaluationCount": 2,
          "CoolDownInterval": 300,
          "TimeConstraints": [
            {
              "StartTime": "06:00:00",
              "EndTime": "23:59:59"
            }
          ],
          "ConditionLogicOperator": "Or",
          "Conditions": [
            {
              "MetricName": "yarn_resourcemanager_root_availablememoryusage",
              "Tags": [
                {
                  "Key": "department",
                  "Value": "IT"
                }
              ],
              "Statistics": "AVG",
              "ComparisonOperator": "LT",
              "Threshold": 12.5
            }
          ]
        }
      }
    ],
    "ScalingPolicyId": "asp-asduwe23znl***",
    "Constraints": {
      "MaxCapacity": 2000,
      "MinCapacity": 0
    }
  },
  "RequestId": "DD6B1B2A-5837-5237-ABE4-FF0C8944****"
}

Error codes

HTTP status code	Error code	Error message
400	ConflictParameters	Parameters that must not be used together. %s
400	IncompleteSignature	The request signature is invalid.
400	InvalidAction	The action %s requested is invalid.
400	InvalidParameter	The specified parameter %s is not valid.
400	InvalidParameterValue	The input parameter %s is invalid or out of range.
400	MissingAction	The action %s requested is missing.
400	MissingParameter	The input parameter %s that is mandatory for processing this request is not supplied.
400	NotAuthorized	You do not have permission to perform this action. %s
400	ThrottlingException	The request was denied due to request throttling. %s
404	ResourceNotFound	The resource not found by %s.
500	InternalError	The request processing has failed due to some unknown error, exception or failure.
503	ServiceFailure	The request has failed due to a temporary failure of %s service.
503	ServiceUnavailable	The request has failed due to a temporary failure of the server.

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

Change history

Change time	Summary of changes	Operation
2024-06-18	The response structure of the API has changed	View Change Details
2024-03-15	The response structure of the API has changed	View Change Details