Updating an Auto Scaling Policy

Function

This API is used to update an auto scaling policy.

URI

PUT /v2/{project_id}/autoscaling-policy/{cluster_id}

**Table 1** URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Explanation Project ID. For details about how to obtain the project ID, see Obtaining a Project ID. Constraints N/A Value range The value must consist of 1 to 64 characters. Only letters and digits are allowed. Default value N/A
cluster_id	Yes	String	Explanation Cluster ID. If this parameter is specified, the latest metadata of the cluster that has been patched will be obtained. For details about how to obtain the cluster ID, see Obtaining a Cluster ID. Constraints N/A Value range The value can contain 1 to 64 characters, including only letters, digits, underscores (_), and hyphens (-). Default value N/A

Request Parameters

**Table 2** Request body parameters
Parameter	Mandatory	Type	Description
node_group_name	Yes	String	Explanation Node group name. Value range This parameter is mandatory. If resource_pool_name is set to default, the auto scaling policies are created by node group. If resource_pool_name is not set to default, policies of the resource pool corresponding to the node group are created.
resource_pool_name	Yes	String	Explanation Pool name. Value range This parameter is mandatory. If the cluster version does not support auto scaling for a specified resource pool, set this parameter to default. If this parameter is not default, the auto scaling policy of the specified resource pool is deleted.
auto_scaling_policy	No	AutoScalingPolicyInfo object	Explanation Auto scaling rule. For details about the parameters, see Table 3.

**Table 3** AutoScalingPolicyInfo
Parameter	Mandatory	Type	Description
auto_scaling_enable	Yes	Boolean	Explanation Whether to enable the auto scaling rule. Constraints N/A Value range true: Enable the auto scaling rule. false: Disable the autoscaling rule. Default value N/A
min_capacity	Yes	Integer	Explanation Minimum number of nodes left in the node group. Constraints N/A Value range 0-500 Default value N/A
max_capacity	Yes	Integer	Explanation Maximum number of nodes in the node group. Constraints N/A Value range 0-500 Default value N/A
resources_plans	No	Array of ResourcesPlan objects	Explanation Resource plan list. If this parameter is left blank, the resource plan is disabled. Constraints When auto_scaling_enable is set to true, either this parameter or resources_plans must be configured. For details about this parameter, see Table 4.
rules	No	Array of Rule objects	Explanation Auto scaling rules. Constraints When auto scaling is enabled, either a resource plan or an auto scaling rule must be configured. The number of records cannot exceed 10. For details, see Table 5.
tags	No	Array of Tag objects	Explanation Auto scaling tags. For details, see Table 7. . Constraints The number of records cannot exceed 20.

**Table 4** ResourcesPlan
Parameter	Mandatory	Type	Description
period_type	Yes	String	Explanation Cycle type of a resource plan. This parameter can be set to daily only. Constraints N/A Value range N/A Default value N/A
start_time	Yes	String	Explanation Start time of a resource plan. The value is in the format of hour:minute, indicating that the time ranges from 00:00 to 23:59. Constraints N/A Value range N/A Default value N/A
end_time	Yes	String	Explanation End time of a resource plan. The format is the same as that of start_time. Constraints The value cannot be earlier than the start_time, and the interval between start_time and start_time cannot be less than 30 minutes. Value range N/A Default value N/A
min_capacity	Yes	Integer	Explanation Minimum number of the preserved nodes in a node group in a resource plan. Constraints N/A Value range 0-500 Default value N/A
max_capacity	Yes	Integer	Explanation Maximum number of the preserved nodes in a node group in a resource plan. Constraints N/A Value range 0-500 Default value N/A
effective_days	No	Array of strings	Explanation The effective date of a resource plan. If this parameter is left blank, it indicates that the resource plan takes effect every day. The options are as follows: MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, and SUNDAY Constraints N/A

**Table 5** Rule
Parameter	Mandatory	Type	Description
name	Yes	String	Explanation Name of an auto scaling rule. Constraints N/A Value range The value can contain 1 to 64 characters, including only letters, digits, underscores (_), and hyphens (-). Rule names must be unique in a node group. Default value N/A
description	No	String	Explanation Description about an auto scaling rule. Constraints N/A Value range The value can contain 0 to 1024 characters. Default value N/A
adjustment_type	Yes	String	Explanation Adjustment type of an auto scaling rule. Constraints N/A Value range scale_out: cluster scale-out scale_in: cluster scale-in Default value N/A
cool_down_minutes	Yes	Integer	Explanation Cluster cooling time after an auto scaling rule is triggered, when no auto scaling operation is performed. The unit is minute. Constraints N/A Value range The value ranges from 0 to 10080. 10080 indicates the number of minutes in a week. Default value N/A
scaling_adjustment	Yes	Integer	Explanation Number of nodes that can be adjusted once. Constraints N/A Value range 1-100 Default value N/A
trigger	Yes	Trigger object	Explanation The condition for triggering a rule. For details, see Table 6. Constraints N/A

**Table 6** Trigger
Parameter	Mandatory	Type	Description
metric_name	Yes	String	Explanation Metric name. This triggering condition makes a judgment according to the value of the metric. Constraints N/A Default value N/A
metric_value	Yes	String	Explanation Metric threshold to trigger a rule. The value must be an integer or a number with two decimal places. Constraints N/A Value range Only integers or numbers with two decimal places are allowed. Default value N/A
comparison_operator	No	String	Explanation Metric judgment logic operator. Constraints N/A Value range LT: less than GT: greater than LTOE: less than or equal to GTOE: greater than or equal to Default value N/A
evaluation_periods	Yes	Integer	Explanation Number of consecutive five-minute periods, during which a metric threshold is reached Constraints N/A Value range 1-288 Default value N/A

**Table 7** Tag
Parameter	Mandatory	Type	Description
key	Yes	String	Explanation Tag key. Constraints N/A Value range A tag key can contain letters, digits, spaces, and special characters _.:=+-@, but cannot start or end with a space or start with _sys_. The tag key of a resource must be unique. It can contain a maximum of 128 Unicode characters and cannot be an empty string. Default value N/A
value	Yes	String	Explanation Tag value. Constraints N/A Value range The value can contain letters, digits, spaces, and special characters _.:=+-@, but cannot start or end with a space or start with _sys_. The value can contain a maximum of 255 Unicode characters and can be an empty string. Default value N/A

Response Parameters

None

Example Request

Update an auto scaling policy, set the number of node groups in node_group_1 to 0 to 5, and configure two scaling rules. If the value of YARNAppRunning is greater than or equal to 75 for one 5-minute period, add one Task node. If the value of YARNAppRunning is less than or equal to 25 for one 5-minute period, stop one Task node. The cooling duration is 20 minutes, and the aaa=bbb label is added to the involved nodes.

/v2/{project_id}/autoscaling-policy/{cluster_id}

{
  "node_group_name" : "ttt",
  "auto_scaling_policy" : {
    "auto_scaling_enable" : true,
    "min_capacity" : 0,
    "max_capacity" : 5,
    "rules" : [ {
      "name" : "default-expand-1",
      "adjustment_type" : "scale_out",
      "cool_down_minutes" : 20,
      "scaling_adjustment" : 1,
      "trigger" : {
        "metric_name" : "YARNAppRunning",
        "metric_value" : 75,
        "comparison_operator" : "GT",
        "evaluation_periods" : 1
      }
    }, {
      "name" : "default-shrink-1",
      "adjustment_type" : "scale_in",
      "cool_down_minutes" : 20,
      "scaling_adjustment" : 1,
      "trigger" : {
        "metric_name" : "YARNAppRunning",
        "metric_value" : 25,
        "comparison_operator" : "LT",
        "evaluation_periods" : 1
      }
    } ],
    "resources_plans" : [ {
      "period_type" : "daily",
      "start_time" : "06:00",
      "end_time" : "20:00",
      "min_capacity" : "0",
      "max_capacity" : "2",
      "effective_days" : null
    } ],
    "tags" : [ {
      "key" : "aaa",
      "value" : "bbb"
    } ]
  },
  "resource_pool_name" : "default"
}