HDInsightCompute Class

Reference

Manages an HDInsight cluster compute target in Azure Machine Learning.

Azure HDInsight is a popular platform for big-data analytics. The platform provides Apache Spark, which can be used to train your model. For more information, see What are compute targets in Azure Machine Learning?

Class ComputeTarget constructor.

Retrieve a cloud representation of a Compute object associated with the provided workspace. Returns an instance of a child class corresponding to the specific type of the retrieved Compute object.

Inheritance: ComputeTarget

HDInsightCompute

Constructor

HDInsightCompute(workspace, name)

Parameters

Name	Description
workspace Required	Workspace The workspace object containing the HDInsightCompute object to retrieve.
name Required	str The name of the of the HDInsightCompute object to retrieve.
workspace Required	Workspace The workspace object containing the Compute object to retrieve.
name Required	str The name of the of the Compute object to retrieve.

Remarks

The following sample shows how to create a Spark for HDInsight cluster in Azure.


   from azureml.core.compute import ComputeTarget, HDInsightCompute
   from azureml.exceptions import ComputeTargetException
   import os

   try:
   # If you want to connect using SSH key instead of username/password you can provide parameters private_key_file and private_key_passphrase

   # Attaching a HDInsight cluster using the public address of the HDInsight cluster is no longer supported.
   # Instead, use resourceId of the HDInsight cluster.
   # The resourceId of the HDInsight Cluster can be constructed using the following string format:
   # /subscriptions/<subscription_id>/resourceGroups/<resource_group>/providers/Microsoft.HDInsight/clusters/<cluster_name>.
   # You can also use subscription_id, resource_group and cluster_name without constructing resourceId.
       attach_config = HDInsightCompute.attach_configuration(resource_id='<resource_id>',
                                                             ssh_port=22,
                                                             username=os.environ.get('hdiusername', '<ssh_username>'),
                                                             password=os.environ.get('hdipassword', '<my_password>'))

       hdi_compute = ComputeTarget.attach(workspace=ws,
                                          name='myhdi',
                                          attach_configuration=attach_config)

   except ComputeTargetException as e:
       print("Caught = {}".format(e.message))


   hdi_compute.wait_for_completion(show_output=True)

Full sample is available from https://github.com/Azure/MachineLearningNotebooks/blob/master/how-to-use-azureml/training/train-in-spark/train-in-spark.ipynb

Methods

attach	DEPRECATED. Use the `attach_configuration` method instead. Associate an existing HDI resource with the provided workspace.
attach_configuration	Create a configuration object for attaching an HDInsight compute target. Attaching a HDInsight cluster using the public address of the HDInsight cluster is no longer supported. Instead, use resourceId of the HDInsight cluster. The resourceId of the HDInsight Cluster can be constructed using the following string format: "/subscriptions/<subscription_id>/resourceGroups/<resource_group>/ providers/Microsoft.HDInsight/clusters/<cluster_name>". You can also use subscription_id, resource_group and cluster_name without constructing resourceId. For more details: https://aka.ms/azureml-compute-hdi
delete	Delete is not supported for HDInsightCompute object. Use detach instead.
deserialize	Convert a JSON object into a HDInsightCompute object.
detach	Detaches the HDInsightCompute object from its associated workspace. Underlying cloud objects are not deleted, only the association is removed.
get_credentials	Retrieve the credentials for the HDInsightCompute target.
refresh_state	Perform an in-place update of the properties of the object. This method updates the properties based on the current state of the corresponding cloud object. This is primarily used for manual polling of compute state.
serialize	Convert this HDInsightCompute object into a JSON serialized dictionary.

attach

DEPRECATED. Use the attach_configuration method instead.

Associate an existing HDI resource with the provided workspace.

static attach(workspace, name, username, address, ssh_port='22', password='', private_key_file='', private_key_passphrase='')

Parameters

Name	Description
workspace Required	Workspace The workspace object to associate the compute resource with.
name Required	str The name to associate with the compute resource inside the provided workspace. Does not have to match the name of the compute resource to be attached.
username Required	str The username needed to access the resource.
address Required	str The address of the resource to be attached.
ssh_port	int The exposed port for the resource. Defaults to 22. Default value: 22
password Required	str The password needed to access the resource.
private_key_file Required	str The path to a file containing the private key for the resource.
private_key_passphrase Required	str The private key phrase needed to access the resource.

Returns

Type	Description
HDInsightCompute	An HDInsightCompute object representation of the compute object.

Exceptions

Type	Description
ComputeTargetException

attach_configuration

Create a configuration object for attaching an HDInsight compute target.

Attaching a HDInsight cluster using the public address of the HDInsight cluster is no longer supported. Instead, use resourceId of the HDInsight cluster. The resourceId of the HDInsight Cluster can be constructed using the following string format: "/subscriptions/<subscription_id>/resourceGroups/<resource_group>/ providers/Microsoft.HDInsight/clusters/<cluster_name>".

You can also use subscription_id, resource_group and cluster_name without constructing resourceId. For more details: https://aka.ms/azureml-compute-hdi

static attach_configuration(username, subscription_id=None, resource_group=None, cluster_name=None, resource_id=None, address=None, ssh_port='22', password='', private_key_file='', private_key_passphrase='')

Parameters

Name	Description
username Required	str The username needed to access the resource.
subscription_id	str The Azure subscription ID Default value: None
resource_group	str Name of the resource group in which HDI cluster is located. Default value: None
cluster_name	str The HDI cluster name Default value: None
resource_id	str The Azure Resource Manager (ARM) resource ID for the resource to be attached. Default value: None
address	str The address for the resource to be attached. Default value: None
ssh_port	int The exposed port for the resource. Defaults to 22. Default value: 22
password Required	str The password needed to access the resource.
private_key_file Required	str The path to a file containing the private key for the resource.
private_key_passphrase Required	str The private key phrase needed to access the resource.

Returns

Type	Description
HDInsightAttachConfiguration	A configuration object to be used when attaching a Compute object.

Exceptions

Type	Description
ComputeTargetException

delete

Delete is not supported for HDInsightCompute object. Use detach instead.

delete()

Exceptions

Type	Description
ComputeTargetException

deserialize

Convert a JSON object into a HDInsightCompute object.

static deserialize(workspace, object_dict)

Parameters

Name	Description
workspace Required	Workspace The workspace object the HDInsightCompute object is associated with.
object_dict Required	dict A JSON object to convert to a HDInsightCompute object.

Returns

Type	Description
HDInsightCompute	The HDInsightCompute representation of the provided JSON object.

Exceptions

Type	Description
ComputeTargetException

Remarks

Raises a ComputeTargetException if the provided workspace is not the workspace the Compute is associated with.

detach

Detaches the HDInsightCompute object from its associated workspace.

Underlying cloud objects are not deleted, only the association is removed.

detach()

Exceptions

Type	Description
ComputeTargetException

get_credentials

Retrieve the credentials for the HDInsightCompute target.

get_credentials()

Returns

Type	Description
dict	The credentials for the HDInsightCompute target

Exceptions

Type	Description
ComputeTargetException

refresh_state

Perform an in-place update of the properties of the object.

This method updates the properties based on the current state of the corresponding cloud object. This is primarily used for manual polling of compute state.

refresh_state()

Exceptions

Type	Description
ComputeTargetException

serialize

Convert this HDInsightCompute object into a JSON serialized dictionary.

serialize()

Returns

Type	Description
dict	The JSON representation of this HDICompute object.

Exceptions

Type	Description
ComputeTargetException

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HDInsightCompute Class

Constructor

Parameters

Remarks

Methods

attach

Parameters

Returns

Exceptions

attach_configuration

Parameters

Returns

Exceptions

delete

Exceptions

deserialize

Parameters

Returns

Exceptions

Remarks

detach

Exceptions

get_credentials

Returns

Exceptions

refresh_state

Exceptions

serialize

Returns

Exceptions

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