You can call the ScaleOutCluster operation to add worker nodes to a Container Service for Kubernetes (ACK) cluster. The worker nodes can be deployed across zones.

Note The ScaleOutCluster API operation is phased out. You must call the node pool-related API operations to manage nodes. If you want to add worker nodes to an ACK cluster, call the ScaleClusterNodePool API operation. For more information, see ScaleClusterNodePool.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request syntax

POST /api/v2/clusters/ClusterId HTTP/1.1 
Content-Type:application/json
{
  "count" : Long,
  "key_pair" : "String",
  "login_password" : "String",
  "vswitch_ids" : [ "String" ],
  "worker_instance_charge_type" : "String",
  "worker_period" : Long,
  "worker_period_unit" : "String",
  "worker_auto_renew" : Boolean,
  "worker_auto_renew_period" : Long,
  "worker_instance_types" : [ "String" ],
  "worker_system_disk_category" : "String",
  "worker_system_disk_size" : Long,
  "worker_data_disks" : [ {
    "category" : "String",
    "size" : Long,
    "encrypted" : "String",
    "auto_snapshot_policy_id" : "String"
  } ],
  "cloud_monitor_flags" : Boolean,
  "cpu_policy" : "String",
  "image_id" : "String",
  "user_data" : "String",
  "rds_instances" : [ "String" ],
  "tags" : [ {
    "key" : "String",
    "value" : "String"
  } ],
  "taints" : [ {
    "key" : "String",
    "value" : "String",
    "effect" : "String"
  } ],
  "runtime" : {
    "name" : "String",
    "version" : "String"
  }
}

Request parameters

Table 1. Request path parameters
Parameter Type Required Example Description
ClusterId String Yes c82e6987e2961451182edacd74faf****

The ID of the cluster.

Table 2. Request body parameters
Parameter Type Required Example Description
count Long Yes 3

The number of worker nodes that you want to add.

key_pair String Yes secrity-key

The name of the key pair. You must set this parameter or the login_password parameter.

login_password String Yes Hello@1234

The password for Secure Shell (SSH) logon. You must set this parameter or the key_pair parameter. The password must be 8 to 30 characters in length, and must contain at least three of the following character types: uppercase letters, lowercase letters, digits, and special characters.

vswitch_ids Array of String Yes vsw-2ze4jvvvade1yk899****

The IDs of the vSwitches that are specified for the nodes that you want to add. Before you scale out an ACK cluster, the cluster uses the vSwitches that are specified when the cluster is created.

worker_instance_charge_type String No PrePaid

The billing method of worker nodes. Valid values:

  • PrePaid: subscription
  • PostPaid: pay-as-you-go

Default value: PostPaid.

worker_period Long No 1

The subscription duration of worker nodes. This parameter takes effect and is required only if worker_instance_charge_type is set to PrePaid.

Valid values: 1, 2, 3, 6, 12, 24, 36, 48, and 60.

Default value: 1.

worker_period_unit String No Month

The billing cycle of worker nodes. This parameter is required only if worker_instance_charge_type is set to PrePaid.

Set the value to Month. Worker nodes are billed only on a monthly basis.

worker_auto_renew Boolean No true

Specifies whether to enable auto-renewal for worker nodes. This parameter takes effect only if worker_instance_charge_type is set to PrePaid. Valid values:

  • true: enables auto-renewal.
  • false: disables auto-renewal.

Default value: true.

worker_auto_renew_period Long No 6

The cycle of auto-renewal. This parameter take effects and is required only if the subscription billing method is selected for worker nodes.

Valid values: 1, 2, 3, 6, and 12.

Default value: 1.

worker_instance_types Array of String Yes ecs.c5.xlarge

The instance types of worker nodes. You must specify at least one instance type. For more information, see Instance families.

Note The instance types are listed in descending order of priority. If worker nodes fail to be created based on the instance type of the highest priority, the system attempts to create worker nodes by using the instance type of the next highest priority.
worker_system_disk_category String Yes cloud_efficiency

The type of system disk that is specified for worker nodes. Valid values:

  • cloud_efficiency: ultra disk
  • cloud_ssd: standard SSD
  • cloud_essd: enhanced SSD

Default value: cloud_ssd.

worker_system_disk_size Long Yes 120

The size of the system disk that is specified for worker nodes. Unit: GiB.

Valid values: 40 to 500.

Default value: 120.

worker_data_disks Array of data_disk No

The configurations of the data disks that are mounted to worker nodes. Each configuration includes disk type and disk size.

cloud_monitor_flags Boolean No true

Specifies whether to install the CloudMonitor agent. Valid values:

  • true: installs the CloudMonitor agent.
  • false: does not install the CloudMonitor agent.

Default value: false.

cpu_policy String No none

The CPU policy. The following policies are supported if the cluster version is 1.12.6 or later.

  • static: This policy allows pods with specific resource characteristics on the node to be granted with enhanced CPU affinity and exclusivity.
  • none: This policy indicates that the default CPU affinity is used.

Default value: none.

image_id String No m-bp16z7xko3vvv8gt****

Specifies a custom image for nodes. By default, the system image is used. You can select a custom image to replace the default image. For more information, see Custom images.

user_data String No IyEvdXNyL2Jpbi9iYXNoCmVjaG8gIkhlbGxvIEFD****

The user-defined data of the node pool. For more information, see Generate user-defined data.

rds_instances Array of String No rm-2zev748xi27xc****

The names of ApsaraDB RDS instances.

tags Array of tag No

The labels to be added to nodes. Labeling rules:

  • Each label consists of a case-sensitive key-value pair. You can add at most 20 labels.
  • When you add a label, you must specify a unique key but you can leave the value empty. A key cannot exceed 64 characters in length and a value cannot exceed 128 characters in length. Keys and values cannot start with aliyun, acs:, https://, or http://. For more information, see Labels and Selectors.
taints Array of taint No

The taints to be added to nodes. Taints are added to nodes to prevent pods from being scheduled to inappropriate nodes. However, toleration rules allow pods to be scheduled to nodes with matching taints. For more information, see taint-and-toleration.

runtime runtime No

The container runtime.

Response syntax

HTTP/1.1 200
Content-Type:application/json
{
  "cluster_id" : "String",
  "request_id" : "String",
  "task_id" : "String"
}

Response parameters

Table 3. Response body parameters
Parameter Type Example Description
cluster_id String c82e6987e2961451182edacd74faf****

The ID of the cluster.

request_id String 687C5BAA-D103-4993-884B-C35E4314A1E1

The ID of the request.

task_id String T-5a54309c80282e39ea00002f

The ID of the task.

Examples

Sample requests

POST /api/v2/clusters/c82e6987e2961451182edacd74faf**** HTTP/1.1 
Content-Type:application/json
{
  "count" : 3,
  "key_pair" : "secrity-key",
  "login_password" : "Hello@1234",
  "vswitch_ids" : [ "vsw-2ze4jvvvade1yk899****" ],
  "worker_instance_charge_type" : "PrePaid",
  "worker_period" : 1,
  "worker_period_unit" : "Month",
  "worker_auto_renew" : true,
  "worker_auto_renew_period" : 6,
  "worker_instance_types" : [ "ecs.c5.xlarge" ],
  "worker_system_disk_category" : "cloud_efficiency",
  "worker_system_disk_size" : 120,
  "worker_data_disks" : [ {
    "category" : "cloud_ssd",
    "size" : 40,
    "encrypted" : "true",
    "auto_snapshot_policy_id" : "sp-2zej1nogjvovnz4z****"
  } ],
  "cloud_monitor_flags" : true,
  "cpu_policy" : "none",
  "image_id" : "m-bp16z7xko3vvv8gt****",
  "user_data" : "IyEvdXNyL2Jpbi9iYXNoCmVjaG8gIkhlbGxvIEFD****",
  "rds_instances" : [ "rm-2zev748xi27xc****" ],
  "tags" : [ {
    "key" : "env",
    "value" : "prod"
  } ],
  "taints" : [ {
    "key" : "key",
    "value" : "value",
    "effect" : "NoSchedule"
  } ],
  "runtime" : {
    "name" : "docker",
    "version" : "19.03.5"
  }
}

Sample success responses

XML format 

HTTP/1.1 200 OK
Content-Type:application/xml

<cluster_id>c82e6987e2961451182edacd74faf****</cluster_id>
<request_id>687C5BAA-D103-4993-884B-C35E4314A1E1</request_id>
<task_id>T-5a54309c80282e39ea00002f</task_id>

JSON format 

HTTP/1.1 200 OK
Content-Type:application/json

{
  "cluster_id" : "c82e6987e2961451182edacd74faf****",
  "request_id" : "687C5BAA-D103-4993-884B-C35E4314A1E1",
  "task_id" : "T-5a54309c80282e39ea00002f"
}

Error codes

For a list of error codes, visit the API Error Center.