Scaling In a Cluster

Function

This API is used to scale in an MRS cluster.

URI

POST /v2/{project_id}/clusters/{cluster_id}/shrink

**Table 1** URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Explanation 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. 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. Constraints N/A Value range The value can contain 1 to 64 characters, including only letters, digits, underscores (_), and hyphens (-). Default value N/A
count	No	Integer	Explanation Number of nodes to be removed. If a specified node is to be removed, this parameter can be left blank. Constraints N/A Value range N/A Default value N/A
resource_ids	No	Array of strings	Explanation Resource IDs of nodes to be removed during node scale-in. If this parameter is left blank, nodes are automatically removed based on system rules. Only abnormal ECS nodes can be removed. The specified nodes are forcibly removed. You can obtain the value of resource_id by calling the host API. Constraints N/A

Response Parameters

Status code: 200

**Table 3** Response body parameter
Parameter	Type	Description
result	String	Explanation Result of the request for updating a mapping. Value range succeeded: The operation is successful. failed: The operation failed.

Example Request

Remove a node from node group node_group_1.

/v2/ff8080828997cb24018a1b2db3440b80/clusters/f7f45c04-4303-411c-9b71-d2cb730dd162/shrink 
  
 { 
   "node_group_name" : "node_group_1", 
   "count" : 1 
 }

Forcibly remove a node whose resource ID is 678050cd-ba1d-4550-942d-f2e396b1c6fb from node group node_group_1.

/v2/ff8080828997cb24018a1b2db3440b80/clusters/f7f45c04-4303-411c-9b71-d2cb730dd162/shrink 
  
 { 
   "node_group_name" : "node_group_1", 
   "resource_ids" : [ "678050cd-ba1d-4550-942d-f2e396b1c6fb" ] 
 }