This API is used to remove instances of specific types and reduce instance storage capacity in a cluster.

You can debug this API in . Automatic authentication is supported.

POST /v1.0/extend/{project_id}/clusters/{cluster_id}/role/shrink

**Table 1** Path parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID. For details, see Obtaining a Project ID and Name.
cluster_id	Yes	String	ID of the cluster you want to scale in

**Table 2** Request body parameter
Parameter	Mandatory	Type	Description
shrink	Yes	Array of ShrinkNodeReq objects	Type and quantity of nodes you want to remove

**Table 3** ShrinkNodeReq
Parameter	Mandatory	Type	Description
reducedNodeNum	Yes	Integer	Number of nodes you want to remove. - After the scale-in, there has to be at least one node in each AZ under each node type. - In a cross-AZ cluster, the difference between the numbers of the same type nodes in different AZs cannot exceed 1. - For a cluster with no Master nodes, the number of removed data nodes (including cold data nodes and other types of nodes) in a scale-in must be fewer than half of the original data node number, and the number of remaining data nodes after a scale-in must be greater than the maximum number of index replicas. - For a cluster with Master nodes, the number of removed master nodes in a scale-in must be fewer than half of the original master node number. After scale-in, there has to be an odd number of master nodes, and there has to be at least three of them.
type	Yes	String	Node type. ess: data node ess-cold: cold data node ess-client: Client node ess-master: Master node

None

{
  "shrink" : [ {
    "type" : "ess",
    "reducedNodeNum" : 1
  } ]
}

None

Status Code	Description
200	The request is processed.
400	Invalid request. Modify the request instead of retrying.
409	The request cannot be processed due to a conflict. This status code indicates that the resource that the client attempts to create already exists, or the request fails to be processed because of the update of the conflict request.
412	The server does not meet one of the requirements that the requester puts on the request.

Removing Nodes of a Specific Type