GetNodeGroup - E-MapReduce - Alibaba Cloud Documentation Center

You can call this operation to obtain the details of a node group.

Debugging

You can run this interface directly in OpenAPI Explorer, saving you the trouble of calculating signatures. After running successfully, OpenAPI Explorer can automatically generate SDK code samples.

Debug

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

Operation: the value that you can use in the Action element to specify the operation on a resource.
Access level: the access level of each operation. The levels are read, write, and list.
Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- The required resource types are displayed in bold characters.
- If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
Condition Key: the condition key that is defined by the cloud service.
Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.

Operation	Access level	Resource type	Condition key	Associated operation
emr:GetNodeGroup	get	All Resources ``	none	none

Request parameters

Parameter	Type	Required	Description	Example
RegionId	string	Yes	The ID of the region in which you want to create the instance.	cn-hangzhou
ClusterId	string	Yes	The ID of the cluster.	c-b933c5aac8fe****
NodeGroupId	string	Yes	The ID of the node group.	ng-869471354ecd****

Response parameters

Parameter	Type	Description	Example
	object	The response parameters.
NodeGroup	NodeGroup	The node group.
RequestId	string	The ID of the request.	DD6B1B2A-5837-5237-ABE4-FF0C8944****

Examples

Sample success responses

JSONformat

{
  "NodeGroup": {
    "ZoneId": "cn-hangzhou",
    "NodeGroupId": "ng-869471354ecd****",
    "NodeGroupName": "core-1",
    "NodeGroupType": "MASTER",
    "RunningNodeCount": 3,
    "InstanceTypes": [
      "ecs.g7.2xlarge"
    ],
    "PaymentType": "Subscription",
    "DataDisks": [
      {
        "Category": "cloud_essd",
        "Size": 80,
        "PerformanceLevel": "PL1",
        "Count": 5
      }
    ],
    "SystemDisk": {
      "Category": "cloud_essd",
      "Size": 60,
      "PerformanceLevel": "PL1",
      "Count": 1
    },
    "NodeGroupState": "RESIZING",
    "AdditionalSecurityGroupIds": [
      ""
    ],
    "WithPublicIp": true,
    "VSwitchIds": [
      "vsw-bp1opd2qejvhsabfe****"
    ],
    "SpotStrategy": "NoSpot",
    "SpotBidPrices": [
      {
        "InstanceType": "ecs.g7.2xlarge",
        "BidPrice": 1000
      }
    ],
    "StateChangeReason": {
      "Code": "UserRequest",
      "Message": "The instance type is required."
    },
    "MinimalNodeCount": 0,
    "MaximalNodeCount": 200,
    "GracefulShutdown": false,
    "SpotInstanceRemedy": false,
    "NodeResizeStrategy": "PRIORITY",
    "CostOptimizedConfig": {
      "OnDemandBaseCapacity": 80,
      "OnDemandPercentageAboveBaseCapacity": 80,
      "SpotInstancePools": 2
    },
    "DeploymentSetStrategy": "NONE",
    "AutoCompensateState": false,
    "ExtraAttributes": {
      "key": "true"
    },
    "AckConfig": {
      "AckInstanceId": "",
      "NodeSelectors": [
        {
          "Key": "department",
          "Value": "IT"
        }
      ],
      "Tolerations": [
        {
          "Key": "",
          "Value": "",
          "Operator": "",
          "Effect": ""
        }
      ],
      "Namespace": "",
      "RequestCpu": 0,
      "RequestMemory": 0,
      "LimitCpu": 0,
      "LimitMemory": 0,
      "DataDiskStorageClass": "",
      "DataDiskSize": 0,
      "CustomLabels": [
        {
          "Key": "department",
          "Value": "IT"
        }
      ],
      "CustomAnnotations": [
        {
          "Key": "department",
          "Value": "IT"
        }
      ],
      "MountHostCgroup": true,
      "NodeAffinity": "",
      "PodAntiAffinity": "",
      "PodAffinity": "",
      "PreStartCommand": [
        ""
      ],
      "Pvcs": [
        {
          "DataDiskStorageClass": "",
          "DataDiskSize": 0,
          "Path": "",
          "Name": ""
        }
      ],
      "Volumes": [
        {
          "Name": "",
          "Path": "",
          "Type": ""
        }
      ],
      "VolumeMounts": [
        {
          "Name": "",
          "Path": ""
        }
      ]
    },
    "IaaSType": "",
    "PrivatePoolOptions": {
      "PrivatePoolIds": [
        ""
      ],
      "MatchCriteria": "Open"
    },
    "Status": "CREATED"
  },
  "RequestId": "DD6B1B2A-5837-5237-ABE4-FF0C8944****"
}

Error codes

HTTP status code	Error code	Error message
400	ConflictParameters	Parameters that must not be used together. %s
400	IncompleteSignature	The request signature is invalid.
400	InvalidAction	The action %s requested is invalid.
400	InvalidParameter	The specified parameter %s is not valid.
400	InvalidParameterValue	The input parameter %s is invalid or out of range.
400	MissingAction	The action %s requested is missing.
400	MissingParameter	The input parameter %s that is mandatory for processing this request is not supplied.
400	NotAuthorized	You do not have permission to perform this action. %s
400	ThrottlingException	The request was denied due to request throttling. %s
404	ResourceNotFound	The resource not found by %s.
500	InternalError	The request processing has failed due to some unknown error, exception or failure.
503	ServiceFailure	The request has failed due to a temporary failure of %s service.
503	ServiceUnavailable	The request has failed due to a temporary failure of the server.

For a list of error codes, visit the Service error codes.

Change history

Change time	Summary of changes	Operation
2023-07-06	The internal configuration of the API is changed, but the call is not affected	View Change Details