Viewing Auto Scaling Policies

Function

This API is used to view all auto scaling policies of a specified cluster.

URI

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

Table 1 URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	The project ID. For details about how to obtain the project ID, see Obtaining a Project ID.
cluster_id	Yes	String	The cluster ID. For details about how to obtain the cluster ID, see Obtaining a Cluster ID.

Request Parameters

None

Response Parameters

Status code: 200

Table 2 Response body parameter
Parameter	Type	Description
[Array element]	Array of AutoScalingPolicyV2 objects	The auto scaling policy list. For details, see Table 3.

Table 3 AutoScalingPolicyV2
Parameter	Type	Description
node_group_name	String	The node group name. This parameter is mandatory. If resource_pool_name is default, the auto scaling policies are created by node group. If resource_pool_name is not default, policies of the resource pool corresponding to the node group are created.
resource_pool_name	String	The resource plan name. 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	AutoScalingPolicyInfo object	The auto scaling policy. For details, see Table 4.

Table 4 AutoScalingPolicyInfo
Parameter	Type	Description
auto_scaling_enable	Boolean	Whether to enable the auto scaling policy.
min_capacity	Integer	The minimum number of nodes reserved in the node group. The value ranges from 0 to 500.
max_capacity	Integer	The maximum number of nodes in the node group. The value ranges from 0 to 500.
resources_plans	Array of ResourcesPlan objects	The resource plan list. If this parameter is left blank, the resource plan is disabled. When auto_scaling_enable is set to true, either this parameter or rules must be configured. For details about this parameter, see Table 5.
rules	Array of Rule objects	List of auto scaling rules. When auto_scaling_enable is set to true, either this parameter or resources_plans must be configured. For details about this parameter, see Table 6.
tags	Array of Tag objects	Auto scaling tags. For details, see Table 8.

Table 5 ResourcesPlan
Parameter	Type	Description
period_type	String	The cycle type of a resource plan. Currently, only the following cycle type is supported: daily
start_time	String	The 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.
end_time	String	The end time of a resource plan. The value is in the same format as that of start_time. The interval between end_time and start_time must be greater than or equal to 30 minutes.
min_capacity	Integer	The minimum number of reserved nodes in a node group in a resource plan. The value ranges from 0 to 500.
max_capacity	Integer	The maximum number of reserved nodes in a node group in a resource plan. The value ranges from 0 to 500.
effective_days	Array of strings	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

Table 6 Rule
Parameter	Type	Description
name	String	The name of an auto scaling rule. The name can contain only 1 to 64 characters. Only letters, numbers, hyphens (-), and underscores (_) are allowed. Rule names must be unique in a node group.
description	String	The description about an auto scaling rule. It contains a maximum of 1,024 characters.
adjustment_type	String	Auto scaling rule adjustment type. Possible values: scale_out: cluster scale-out scale_in: cluster scale-in
cool_down_minutes	Integer	The cluster cooling time after an auto scaling rule is triggered, when no auto scaling operation is performed. The unit is minute. The value ranges from 0 to 10080. One week is equal to 10,080 minutes.
scaling_adjustment	Integer	The number of cluster nodes that can be adjusted at a time. The value ranges from 1 to 100.
trigger	Trigger object	The condition for triggering a rule. For details, see Table 7.

Table 7 Trigger
Parameter	Type	Description
metric_name	String	The metric name. This triggering condition makes a judgment according to the value of the metric. A metric name contains a maximum of 64 characters.
metric_value	String	The metric threshold to trigger a rule. The value must be an integer or a number with two decimal places.
comparison_operator	String	The metric judgment logic operator. Possible values: LT: less than GT: greater than LTOE: less than or equal to GTOE: greater than or equal to
evaluation_periods	Integer	The number of consecutive five-minute periods, during which a metric threshold is reached. The value ranges from 1 to 288.

Table 8 Tag
Parameter	Type	Description
key	String	Tag key The tag key can contain a maximum of 36 Unicode characters and cannot be an empty string. The tag key cannot start or end with spaces or contain non-printable ASCII characters (0–31) and special characters (=*<>\,\|/). The tag key of a resource must be unique.
value	String	Tag value The value can contain 0 to 43 unicode characters. The tag value cannot start or end with spaces or contain non-printable ASCII characters (0–31) and special characters (=*<>\,\|/).

Status code: 400

Table 9 Response body parameters
Parameter	Type	Description
error_code	String	Error codes.
error_msg	String	The error message.

Example Request

None

Example Response

Status code: 200

Auto scaling policies are displayed.

{
  "auto_scaling_policies" : [ {
    "node_group_name" : "task_node_analysis_group",
    "resource_pool_name" : "default",
    "auto_scaling_policy" : {
      "auto_scaling_enable" : true,
      "min_capacity" : 0,
      "max_capacity" : 1,
      "resources_plans" : [ {
        "period_type" : "daily",
        "effective_days" : [ "SUNDAY" ],
        "start_time" : "12:00",
        "end_time" : "13:00",
        "min_capacity" : 2,
        "max_capacity" : 3
      } ],
      "rules" : [ {
        "name" : "default-expand-1",
        "description" : "",
        "adjustment_type" : "scale_out",
        "cool_down_minutes" : 5,
        "scaling_adjustment" : 1,
        "trigger" : {
          "metric_name" : "YARNAppRunning",
          "metric_value" : 100,
          "comparison_operator" : "GTOE",
          "evaluation_periods" : 1
        }
      } ]
    }
  } ]
}

Status Codes

See Status Codes.

Error Codes

See Error Codes.

Parent topic: Auto Scaling APIs

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Auto Scaling APIs

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Updating an Auto Scaling Policy

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