openlineage-python 0.12.0

OpenLineage Python Client

OpenLineage-python

To install from source, run:

$ python setup.py install

Configuration

Config file

Main way of configuring OpenLineage Client is by yaml file, which contains all the details of how to connect to your OpenLineage backend.

Config file is located by

1. looking at OPENLINEAGE_CONFIG environment variable
2. looking for file openlineage.yml at current working directory
3. looking for file openlineage.yml at $HOME/.openlineage directory.

Different ways of connecting to OpenLineage backend are supported by standarized Transport interface.
This is example config that specifies http transport:

transport:
  type: "http"
  url: "https://backend:5000"
  auth:
    type: "api_key"
    api_key: "f048521b-dfe8-47cd-9c65-0cb07d57591e"

type property is required. It can be one of the build-in transports, or custom one. There are three build-in transports, http, kafka or console. Custom transports type is fully qualified class name that can be imported.

Rest of the properties are defined by particular transport.
Specification of build-in ones are below.

HTTP

• url - required string parameter specifying
• timeout - optional float parameter specifying timeout when sending event. By default 5 seconds.
• verify optional boolean attribute specifying if client should verify TLS certificates of backend. By default true.
• auth - optional dictionary specifying authentication options. Type property is required.
  • type: required property if auth dictionary is set. Set to api_key or to fully qualified class name of your TokenProvider
  • api_key: if api_key type is set, it sets value at Authentication HTTP header as Bearer

Kafka

• config - required string parameter - dictionary that contains Kafka producer config as in Kafka producer config
• topic - required string parameter - topic on what events will be send
• flush - optional boolean parameter - if it's set to True, then Kafka will flush after each event. By default set to true.

Custom transport

To implement custom transport, follow instructions in openlineage/client/transport/transport.py file.

Config as env vars

If there is no config file found, OpenLineage client looks at environment variables.
This way of configuring supports only http transport, and only subset of it's config.

• OPENLINEAGE_URL - point to service which will consume OpenLineage events
• OPENLINEAGE_API_KEY - set if consumer of OpenLineage events requires Bearer authentication key

OPENLINEAGE_URL and OPENLINEAGE_API_KEY can also be set up manually when creating client instance.