Connection

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Connection

hsml.connection.Connection(
    host=None,
    port=443,
    project=None,
    hostname_verification=True,
    trust_store_path=None,
    api_key_file=None,
    api_key_value=None,
)

A Hopsworks Model Management connection object.

The connection is project specific, so you can access the project's own Model Registry and Model Serving.

This class provides convenience classmethods accessible from the hsml-module:

Connection factory

For convenience, hsml provides a factory method, accessible from the top level module, so you don't have to import the Connection class manually:

import hsml
conn = hsml.connection()

Save API Key as File

To get started quickly, you can simply create a file with the previously created Hopsworks API Key and place it on the environment from which you wish to connect to Hopsworks.

You can then connect by simply passing the path to the key file when instantiating a connection:

    import hsml
    conn = hsml.connection(
        'my_instance',                      # DNS of your Hopsworks instance
        443,                                # Port to reach your Hopsworks instance, defaults to 443
        'my_project',                       # Name of your Hopsworks project
        api_key_file='modelregistry.key',   # The file containing the API key generated above
        hostname_verification=True)         # Disable for self-signed certificates
    )
    mr = conn.get_model_registry()          # Get the project's default model registry
    ms = conn.get_model_serving()           # Uses the previous model registry

Clients in external clusters need to connect to the Hopsworks Model Registry and Model Serving using an API key. The API key is generated inside the Hopsworks platform, and requires at least the "project", "modelregistry", "dataset.create", "dataset.view", "dataset.delete", "serving" and "kafka" scopes to be able to access a model registry and its model serving. For more information, see the integration guides.

Arguments

• host Optional[str]: The hostname of the Hopsworks instance, defaults to None.
• port int: The port on which the Hopsworks instance can be reached, defaults to 443.
• project Optional[str]: The name of the project to connect to. When running on Hopsworks, this defaults to the project from where the client is run from. Defaults to None.
• hostname_verification bool: Whether or not to verify Hopsworks certificate, defaults to True.
• trust_store_path Optional[str]: Path on the file system containing the Hopsworks certificates, defaults to None.
• api_key_file Optional[str]: Path to a file containing the API Key.
• api_key_value Optional[str]: API Key as string, if provided, however, this should be used with care, especially if the used notebook or job script is accessible by multiple parties. Defaults to None.

Returns

Connection. Connection handle to perform operations on a Hopsworks project.

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Properties

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api_key_file

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api_key_value

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host

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hostname_verification

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port

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project

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Methods

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close

Connection.close()

Close a connection gracefully.

This will clean up any materialized certificates on the local file system of external environments.

Usage is recommended but optional.

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connect

Connection.connect()

Instantiate the connection.

Creating a Connection object implicitly calls this method for you to instantiate the connection. However, it is possible to close the connection gracefully with the close() method, in order to clean up materialized certificates. This might be desired when working on external environments. Subsequently you can call connect() again to reopen the connection.

Example

import hsml
conn = hsml.connection()
conn.close()
conn.connect()

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connection

Connection.connection(
    host=None,
    port=443,
    project=None,
    hostname_verification=True,
    trust_store_path=None,
    api_key_file=None,
    api_key_value=None,
)

Connection factory method, accessible through hsml.connection().

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get_model_registry

Connection.get_model_registry(project=None)

Get a reference to a model registry to perform operations on, defaulting to the project's default model registry. Shared model registries can be retrieved by passing the project argument.

Arguments

• project str: The name of the project that owns the shared model registry, the model registry must be shared with the project the connection was established for, defaults to None.

Returns

ModelRegistry. A model registry handle object to perform operations on.

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get_model_serving

Connection.get_model_serving()

Get a reference to model serving to perform operations on. Model serving operates on top of a model registry, defaulting to the project's default model registry.

Example

import hopsworks

project = hopsworks.login()

ms = project.get_model_serving()

Returns

ModelServing. A model serving handle object to perform operations on.

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