Help Center/ ModelArts/ API Reference/ Resource Management/ Obtaining Nodes in a Resource Pool

Updated on 2026-01-30 GMT+08:00

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Obtaining Nodes in a Resource Pool

Function

This API is used to obtain the node list of a specified resource pool. This API is used when you need to obtain the details about a resource pool, such as the node distribution, status, or resource usage. Before using this API, ensure that the resource pool has been created and is available, and you have the required permission. After the query, the system returns the detailed information about the nodes in the resource pool, including the node ID, status, and resource usage, helping you manage and optimize resources. If the resource pool does not exist, you do not have the permission to access the resource pool, or the request parameters are invalid, the API will return an error message.

Debugging

You can debug this API through automatic authentication in API Explorer or use the SDK sample code generated by API Explorer.

Authorization Information

Each account has all the permissions required to call all APIs, but IAM users must be assigned the required permissions.

If you are using role/policy-based authorization, see Permissions Policies and Supported Actions for details on the required permissions.

If you are using identity policy-based authorization, the following identity policy-based permissions are required.

Action	Access Level	Resource Type (*: required)	Condition Key	Alias	Dependencies
modelarts:pool:get	Read	pool *	g:ResourceTag/<tag-key>	-	-
modelarts:pool:get	Read	-	g:EnterpriseProjectId	-	-

URI

GET /v2/{project_id}/pools/{pool_name}/nodes

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Definition: Project ID. For details, see Obtaining a Project ID and Name. Constraints: The value can contain 1 to 64 characters. Letters, digits, and hyphens (-) are allowed. Range: N/A Default Value: N/A
pool_name	Yes	String	Definition: Resource pool ID. The value is obtained from the metadata.name field in the resource pool details. *Constraints: The value can contain 36 to 63 characters. It must start with a lowercase letter and cannot end with a hyphen (-). Digits and hyphens (-) are allowed. Range: N/A Default Value: N/A

**Table 2** Query Parameters
Parameter	Mandatory	Type	Description
continue	No	String	Definition: Offset parameter of the pagination query Constraints: Optional Range: The value is obtained from the metadata.continue field in the response to the last pagination query. An empty value indicates no offset. Default Value: N/A
limit	No	Integer	Definition: Number of resources returned in a single pagination query Constraints: N/A Range: 0 to 500 Default Value: 500

Request Parameters

None

Response Parameters

Status code: 200

**Table 3** Response body parameters
Parameter	Type	Description
apiVersion	String	Definition: API version of the resource. Range: v2: The current resource version is v2.
kind	String	Definition: Resource type. Range: NodeList: nodes
metadata	NodeListMetadata object	Definition: Metadata of a node list.
items	Array of Node objects	Definition: Node resource list.

**Table 4** NodeListMetadata
Parameter	Type	Description
continue	String	Definition: Offset parameter of the pagination query. Range: The value is obtained from the metadata.continue field in the response to the last pagination query. An empty value indicates no offset.
remainingItemCount	Long	Definition: Number of remaining resources in a pagination query. Default Value: N/A

**Table 5** Node
Parameter	Type	Description
apiVersion	String	Definition: API version of the resource. Range: v2: The current resource version is v2.
kind	String	Definition: Resource type. Range: Node: node
metadata	NodeMetadata object	Definition: Metadata of a node resource.
spec	NodeSpec object	Definition: Specifications of a node resource.
status	NodeStatus object	Definition: Status of a node resource.

**Table 6** NodeMetadata
Parameter	Type	Description
name	String	Definition: Node name. Range: N/A
creationTimestamp	String	Definition: Creation time. Range: N/A
labels	NodeLabels object	Definition: Node labels.
annotations	NodeVOAnnotations object	Definition: Node annotations.

**Table 7** NodeLabels
Parameter	Type	Description
os.modelarts.node/cluster	String	Definition: Name of the cluster where the node is located. Range: N/A
os.modelarts.node/elastic.quota	String	Definition: Logical pool bound to the node. Range: N/A
os.modelarts.node/nodepool	String	Definition: ID of the node pool where the node is located. Range: N/A
os.modelarts.node/batch.uid	String	Definition: Batch creation ID. Range: N/A
os.modelarts.node/batch.name	String	Definition: Batch creation name. Range: N/A
os.modelarts.node/batch.type	String	Definition: Batch creation type. Range hyperinstance: supernode
os.modelarts.node/batch.count	String	Definition: Number of nodes created in batches. Range: N/A
os.modelarts/resource.id	String	Definition: Node resource ID. Range: N/A
os.modelarts/tenant.domain.id	String	Definition: Tenant ID of a node, which records the tenant account under which the node is created. Range: N/A
os.modelarts/tenant.project.id	String	Definition: Project ID of a node, which records the project under which the node is created. Range: N/A
os.modelarts/billing.status	String	Definition: Node billing status. Range 0: normal 1: frozen 2: deleted or terminated
os.modelarts.node/volcano.scheduler.cabinet-exclusive	String	Definition: Whether the node is exclusively occupied by a full-rack job. If yes, tha tag exists and its value is the ID of the exclusive training job. Range: N/A
cce.kubectl.kubernetes.io/cabinet	String	Definition: IP address of the TOR switch where the node is located. Use hyphens (-) to separate multiple IP addresses of TOR switches. Range: N/A
os.modelarts.node/underlying.instance.id	String	Definition: Instance ID of the underlying resources of the node, for example, the ECS instance ID of the supernode. Range: N/A
os.modelarts.node/ha.redundant.enabled	String	Definition: Whether HA redundancy is enabled for the node. Range true: enabled false: disabled
os.modelarts.node/nodepoolname	String	Definition: Name of the node pool where the node is located. The value can contain 2 to 50 characters and must start with a lowercase letter. It cannot end with a hyphen (-) or -default. Only lowercase letters, hyphens (-), and digits are allowed. Range: N/A

**Table 8** NodeVOAnnotations
Parameter	Type	Description
os.modelarts/npu-topology-placement	String	Definition: Topology of the NPU resource usage. The value is a 16-bit binary number, where the first bit from the right indicates PU 1. 1 indicates occupied, and 0 indicates idle. For example, if PUs 1 and 15 are occupied in a 16-PU server, the value is 0100000000000001. If PUs 1 and 7 are occupied in an 8-PU server, the returned value is 0000000001000001. Constraints: N/A Range: N/A Default Value: N/A

**Table 9** NodeSpec
Parameter	Type	Description
flavor	String	Definition: Node specifications. Range: N/A.
os	Os object	Definition: OS image information.
hostNetwork	NodeNetwork object	Definition: Node network information.
rootVolume	VolumeVO object	Definition: System disk information.
dataVolumes	Array of VolumeVO objects	Definition: Data disk information.
extendParams	ResourceExtendParams object	Definition: Custom configuration.

**Table 10** Os
Parameter	Type	Description
name	String	Definition: OS name and version, for example, EulorOS 2.5. This parameter can be left blank when a private image is specified. Range: N/A.
imageId	String	Definition: OS image ID. Range: N/A.
imageType	String	Definition: OS image type. This parameter must be specified when a private image is set. By default, the preset image is used. You do not need to specify this field. Range: private: private images "": The preset image is used.
autoMatch	String	Definition: Automatic OS image matching configuration. If this parameter is set, the optimal image is automatically selected, and this parameter is automatically cleared. Range: OS name and version, for example, EulorOS 2.5.

**Table 11** NodeNetwork
Parameter	Type	Description
vpc	String	Definition: VPC ID. Range: N/A.
subnet	String	Definition: Subnet ID. Range: N/A.
securityGroups	Array of strings	Definition: Security group ID set.

**Table 12** VolumeVO
Parameter	Type	Description
volumeType	String	Definition: Disk type.. Range: SSD: Ultra-high I/O disk GPSSD: General-purpose SSD
size	String	Definition: Disk size, in GiB. Range: N/A.
count	Integer	Definition: Number of disks. If this parameter is not specified, the default value 1 is used. Range: N/A.

**Table 13** ResourceExtendParams
Parameter	Type	Description
dockerBaseSize	String	Definition: Container image space of a node. Range: Specified: The default value of dockerBaseSize ranges from 50 to 500. However, the actual value is restricted by the container data disk size of the node. Unlimited: *dockerBaseSize="0, indicating that the container image space is not limited.
postInstall	String	Definition: Post-installation script. The entered value must be encoded using Base64. Range: N/A.
runtime	String	Definition: Container runtime. Range: docker: Container runtime. It is the most commonly used container engine, which is used to create and manage container instances based on container images. containerd: Industrial-grade container runtime. It focuses on container lifecycle management and is one of the core components at the bottom layer of Docker. It can also be deployed independently.
labelPolicyOnExistingNodes	String	Definition: Kubernetes label update policy of existing nodes. If the value is empty, the existing nodes are updated by default. Range: refresh: Update. ignore: Do not update.
taintPolicyOnExistingNodes	String	Definition: Kubernetes taint update policy of existing nodes. If the value is empty, the existing nodes are updated by default. Range: refresh: Update. ignore: Do not update.
tagPolicyOnExistingNodes	String	Definition: Resource tag update policy of existing nodes. If the value is empty, the existing nodes are updated by default. Range: refresh: Update. ignore: Do not update.
XParameterPlaneSubnet	String	Definition: Subnet ID used for data transmission on the parameter plane between physical clusters. The value cannot be the same as the node subnet or container subnet. Range: N/A.
nodePoolName	String	Definition: Name of the node pool specified by you. The value is a string of 2 to 50 characters, consisting of lowercase letters, hyphens (-), and digits. It must start with a lowercase letter and cannot end with a hyphen (-) or -default. Range: N/A.

**Table 14** NodeStatus
Parameter	Type	Description
phase	String	Definition: Status of a node. Range: Available: The node is available. Creating: The node is being created. Deleting: The node is being deleted. Abnormal: The node is abnormal. Checking: The node is performing a self-check.
az	String	Definition: AZ where a node is located. Range: N/A
privateIp	String	Definition: IP address of a node. Range: N/A
resources	NodeResource object	Definition: Resources of a node.
availableResources	NodeResource object	Definition: Available resources of a node.

**Table 15** NodeResource
Parameter	Type	Description
cpu	String	Definition: Number of CPU cores on a node. Range: N/A
memory	String	Definition: Memory size of a node, in GiB. Range: N/A
nvidia.com/gpu	String	Definition: Number of GPUs on a node. Range: N/A
huawei.com/ascend-snt3	String	Definition: Number of snt3 NPUs on a node. Range: N/A
huawei.com/ascend-snt9	String	Definition: Number of snt9 NPUs on a node. Range: N/A

Status code: 404

**Table 16** Response body parameters
Parameter	Type	Description
error_code	String	Definition: ModelArts error code. Range: N/A
error_msg	String	Definition: Error message. Range: N/A

Example Requests

Obtain nodes in a resource pool.

GET https://{endpoint}/v2/{project_id}/pools/{pool_name}/nodes

{ }

Example Responses

Status code: 200

{
  "kind" : "NodeList",
  "apiVersion" : "v2",
  "metadata" : { },
  "items" : [ {
    "kind" : "Node",
    "apiVersion" : "v2",
    "metadata" : {
      "name" : "os-node-created-zlncn",
      "creationTimestamp" : "2022-09-16T05:32:44Z"
    },
    "spec" : {
      "flavor" : "modelarts.vm.cpu.4ud"
    },
    "status" : {
      "phase" : "Available",
      "az" : "cn-north-7c",
      "privateIp" : "192.168.0.1",
      "resources" : {
        "cpu" : "3920m",
        "memory" : "6270Mi"
      },
      "availableResources" : {
        "cpu" : "2970m",
        "memory" : "4558Mi"
      }
    }
  }, {
    "kind" : "Node",
    "apiVersion" : "v2",
    "metadata" : {
      "name" : "os-node-created-4s522",
      "creationTimestamp" : "2022-09-16T03:20:53Z"
    },
    "spec" : {
      "flavor" : "modelarts.vm.cpu.4ud"
    },
    "status" : {
      "phase" : "Available",
      "az" : "cn-north-7c",
      "privateIp" : "192.168.0.2",
      "resources" : {
        "cpu" : "3920m",
        "memory" : "6270Mi"
      },
      "availableResources" : {
        "cpu" : "2970m",
        "memory" : "4558Mi"
      }
    }
  }, {
    "kind" : "Node",
    "apiVersion" : "v2",
    "metadata" : {
      "name" : "os-node-created-v7hfj",
      "creationTimestamp" : "2022-09-16T09:16:37Z"
    },
    "spec" : {
      "flavor" : "modelarts.vm.cpu.4ud"
    },
    "status" : {
      "phase" : "Available",
      "az" : "cn-north-7c",
      "privateIp" : "192.168.0.3",
      "resources" : {
        "cpu" : "3920m",
        "memory" : "6270Mi"
      },
      "availableResources" : {
        "cpu" : "3720m",
        "memory" : "5670Mi"
      }
    }
  } ]
}

Status code: 404

Not found.

{
  "error_code" : "ModelArts.50015001",
  "error_msg" : "pool not found"
}

Status Codes

Status Code	Description
200	OK
404	Not found.

Error Codes

See Error Codes.

Parent topic: Resource Management

Previous topic: Querying a Plug-in Template

Next topic: Deleting nodes in batches

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