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	Project ID. The value can contain a maximum of 64 characters.
cluster_id	Yes	String	Cluster ID. The value can contain a maximum of 64 characters.

Request Parameters

**Table 2** Request body parameters
Parameter	Mandatory	Type	Description
node_group_name	Yes	String	Node group name Minimum length: 1 character Maximum length: 64 characters
count	No	Integer	Number of nodes to be removed. If a specified node is to be removed, this parameter can be left blank.
resource_ids	No	Array of strings	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.

Response Parameters

Status code: 200

**Table 3** Response body parameter
Parameter	Type	Description
result	String	Operation result. Value succeeded indicates that the operation is successful, and value failed indicates that the operation fails.

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" ] 
 }