Adding Components to a Cluster

Function

This API is used to add components to a cluster.

URI

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

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

Request Parameters

**Table 2** Request body parameters
Parameter	Mandatory	Type	Description
components_install_mode	Yes	Array of ComponentInstallMode objects	Component installation details. For details about the parameters, see Table 3.

**Table 3** ComponentInstallMode
Parameter	Mandatory	Type	Description
component	Yes	String	Component name
node_groups	Yes	Array of AssignedNodeGroup objects	Role deployment information of the component. For details, see Table 4.
component_user_password	No	String	User password of the component. The password is used for machine-machine account to connect to the ClickHouse component. The password: Must contain 8 to 26 characters. Cannot be the username or the username spelled backwards. Must contain every type of the following: Lowercase letters Uppercase letters Numbers Special characters (!@$%^-_=+[{}]:,./?)
component_default_password	No	String	Default user password of the component. The password is used for human-machine account to connect to the ClickHouse component. The password: Must contain 8 to 26 characters. Cannot be the username or the username spelled backwards. Must contain every type of the following: Lowercase letters Uppercase letters Numbers Special characters (!@$%^-_=+[{}]:,./?)

**Table 4** AssignedNodeGroup
Parameter	Mandatory	Type	Description
name	Yes	String	Node group name
assigned_roles	Yes	Array of strings	Role deployment information. You can specify the roles deployed in a node group. This parameter is a string array. Each string represents a role expression. Role expression definition: If the role is deployed on all nodes in a node group, set this parameter to {role name}, for example, DataNode. If the role is deployed on a specified subscript node in the node group: {role name}:{index1},{index2}…,{indexN}, for example, NameNode:1,2. The subscript starts from 1. For some roles, multiple instances of the same role can be deployed on the same node with {role name}[{instance count}], for example, EsNode[9]. You do not need to specify the role location. By default, multiple instances are deployed on all nodes in a node group. For details about the available roles, see the Roles and Components Supported by MRS.

Response Parameters

Status code: 200

**Table 5** 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

Add the ClickHouse component to a cluster in normal mode.

v2/f77c10d14a544393a24e5f0bf53202b6/clusters/ff879d3a-e5d5-4485-a9b6-c673b52673fa/components

{
  "components_install_mode" : [ {
    "component" : "ClickHouse",
    "node_groups" : [ {
      "name" : "master_node_default_group",
      "assigned_roles" : [ "ClickHouseServer:1,2" ]
    }, {
      "name" : "node_group_1",
      "assigned_roles" : [ "ClickHouseServer", "ClickHouseBalancer" ]
    } ],
    "component_user_password" : "*****",
    "component_default_password" : "*****"
  } ]
}

Add the HBase component.

v2/f77c10d14a544393a24e5f0bf53202b6/clusters/ff879d3a-e5d5-4485-a9b6-c673b52673fa/components

{
  "components_install_mode" : [ {
    "component" : "HBase",
    "node_groups" : [ {
      "name" : "master_node_default_group",
      "assigned_roles" : [ "RegionServer", "HMaster" ]
    } ]
  } ]
}