Version 0.21.0

Major Features and Improvements

Pipelines compiled using KubeflowDagRunner now defaults to using the gRPC-based MLMD server deployed in Kubeflow Pipelines clusters when performing operations on pipeline metadata.
Added tfx model rewriting and tflite rewriter.
Added LatestBlessedModelResolver as an experimental feature which gets the latest model that was blessed by model validator.
TFX version 0.21.0 will be the last version of TFX supporting Python 2.
Added support for RuntimeParameters to allow users can specify templated values at runtime. This is currently only supported in Kubeflow Pipelines. Currently, only attributes in ComponentSpec.PARAMETERS and the URI of external artifacts can be parameterized (component inputs / outputs can not yet be parameterized). See tfx/examples/chicago_taxi_pipeline/taxi_pipeline_runtime_parameter.py for example usage.
Users can access the parameterized pipeline root when defining the pipeline by using the pipeline.ROOT_PARAMETER placeholder in KubeflowDagRunner.
Users can pass appropriately encoded Python dict objects to specify protobuf parameters in ComponentSpec.PARAMETERS; these will be decoded into the proper protobuf type. Users can avoid manually constructing complex nested protobuf messages in the component interface.
Added support in Trainer for using other model artifacts. This enables scenarios such as warm-starting.
Updated trainer executor to pass through custom config to the user module.
Artifact type-specific properties can be defined through overriding the PROPERTIES dictionary of a types.artifact.Artifact subclass.
Added new example of chicago_taxi_pipeline on Google Cloud Bigquery ML.
Added support for multi-core processing in the Flink and Spark Chicago Taxi PortableRunner example.
Added a metadata adapter in Kubeflow to support logging the Argo pod ID as an execution property.
Added a prototype Tuner component and an end-to-end iris example.
Created new generic trainer executor for non estimator based model, e.g., native Keras.
Updated to support passing tfma.EvalConfig in evaluator when calling TFMA.
Users can create a pipeline using a new experimental CLI command, template.
Added an iris example with native Keras.

Bug fixes and other changes

Added --skaffold_cmd flag when updating a pipeline for kubeflow in CLI.
Changed python_version to 3.7 when using TF 1.15 and later for Cloud AI Platform Prediction.
Switched the default behavior of KubeflowDagRunner to not mounting GCP secret.
Fixed "invalid spec: spec.arguments.parameters[6].name 'pipeline-root' is not unique" error when the user include pipeline.ROOT_PARAMETER and run pipeline on KFP.
Added support for an hparams artifact as an input to Trainer in preparation for tuner support.
Refactored common dependencies in the TFX dockerfile to a base image to improve the reliability of image building process.
Fixes missing Tensorboard link in KubeflowDagRunner.
Depends on apache-beam[gcp]>=2.17,<2.18
Depends on ml-metadata>=0.21,<0.22.
Depends on tensorflow-data-validation>=0.21,<0.22.
Depends on tensorflow-model-analysis>=0.21,<0.22.
Depends on tensorflow-transform>=0.21,<0.22.
Depends on tfx-bsl>=0.21,<0.22.
Depends on pyarrow>=0.14,<0.15.
Removed tf.compat.v1 usage for iris and cifar10 examples.
CSVExampleGen: started using the CSV decoding utilities in tfx-bsl (tfx-bsl>=0.15.2)
Fixed problems with Airflow tutorial notebooks.
Added performance improvements for the Transform Component (for statistics generation).
Raised exceptions when container building fails.
Enhanced custom slack component by adding a kubeflow example.
Allowed windows style paths in Transform component cache.
Fixed bug in CLI (--engine=kubeflow) which uses hard coded obsolete image (TFX 0.14.0) as the base image.
Fixed bug in CLI (--engine=kubeflow) which could not handle skaffold response when an already built image is reused.
Allowed users to specify the region to use when serving with AI Platform.
Allowed users to give deterministic job id to AI Platform Training job.
System-managed artifact properties ("name", "state", "pipeline_name" and "producer_component") are now stored as ML Metadata artifact custom properties.
Fixed loading trainer and transformation functions from python module files without the .py extension.
Fixed some ill-formed visualization when running on KFP.
Removed system info from artifact properties and use channels to hold info for generating MLMD queries.
Rely on MLMD context for inter-component artifact resolution and execution publishing.
Added pipeline level context and component run level context.
Included test data for examples/chicago_taxi_pipeline in package.
Changed BaseComponentLauncher to require the user to pass in an ML Metadata connection object instead of a ML Metadata connection config.
Capped version of Tensorflow runtime used in Google Cloud integration to 1.15.
Updated Chicago Taxi example dependencies to Beam 2.17.0, Flink 1.9.1, Spark 2.4.4.
Fixed an issue where build_ephemeral_package() used an incorrect path to locate the tfx directory.
The ImporterNode now allows specification of general artifact properties.
Added 'tfx_executor', 'tfx_version' and 'tfx_py_version' labels for CAIP, BQML and Dataflow jobs submitted from TFX components.

Deprecations

Breaking changes

For pipeline authors

Standard artifact TYPE_NAME strings were reconciled to match their class names in types.standard_artifacts.
The "split" property on multiple artifacts has been replaced with the JSON-encoded "split_names" property on a single grouped artifact.
The execution caching mechanism was changed to rely on ML Metadata pipeline context. Existing cached executions will not be reused when running on this version of TFX for the first time.
The "split" property on multiple artifacts has been replaced with the JSON-encoded "split_names" property on a single grouped artifact.

For component authors

Artifact type name strings to the types.artifact.Artifact and types.channel.Channel classes are no longer supported; usage here should be replaced with references to the artifact subclasses defined in types.standard_artfacts.* or to custom subclasses of types.artifact.Artifact.

Documentation updates

Version 0.15.0

Major Features and Improvements

Offered unified CLI for tfx pipeline actions on various orchestrators including Apache Airflow, Apache Beam and Kubeflow.
Polished experimental interactive notebook execution and visualizations so they are ready for use.
Added BulkInferrer component to TFX pipeline, and corresponding offline inference taxi pipeline.
Introduced ImporterNode as a special TFX node to register external resource into MLMD so that downstream nodes can use as input artifacts. An example taxi_pipeline_importer.py enabled by ImporterNode was added to showcase the user journey of user-provided schema (issue #571).
Added experimental support for TFMA fairness indicator thresholds.
Demonstrated DirectRunner multi-core processing in Chicago Taxi example, including Airflow and Beam.
Introduced PipelineConfig and BaseComponentConfig to control the platform specific settings for pipelines and components.
Added a custom Executor of Pusher to push model to BigQuery ML for serving.
Added KubernetesComponentLauncher to support launch ExecutorContainerSpec in a Kubernetes cluster.
Made model validator executor forward compatible with TFMA change.
Added Iris flowers classification example.
Added support for serialization and deserialization of components.
Made component launcher extensible to support launching components on multiple platforms.
Simplified component package names.
Introduced BaseNode as the base class of any node in a TFX pipeline DAG.
Added docker component launcher to launch container component.
Added support for specifying pipeline root in runtime when run on KubeflowDagRunner. A default value can be provided when constructing the TFX pipeline.
Added basic span support in ExampleGen to ingest file based data sources that can be updated regularly by upstream.
Branched serving examples under chicago_taxi_pipeline/ from chicago_taxi/ example.
Supported beam arg 'direct_num_workers' for multi-processing on local.
Improved naming of standard component inputs and outputs.
Improved visualization functionality in the experimental TFX notebook interface.
Allowed users to specify output file format when compiling TFX pipelines using KubeflowDagRunner.
Introduced ResolverNode as a special TFX node to resolve input artifacts for downstream nodes. ResolverNode is a convenient way to wrap TFX Resolver, a logical unit for resolving input artifacts.
Added cifar-10 example to demonstrate image classification.
Added container builder feature in the CLI tool for container-based custom python components. This is specifically for the Kubeflow orchestration engine, which requires containers built with the custom python code.
Demonstrated DirectRunner multi-core processing in Chicago Taxi example, including Airflow and Beam.
Added Kubeflow artifact visualization of inputs, outputs and execution properties for components using a Markdown file. Added Tensorboard to Trainer components as well.

Bug fixes and other changes

Bumped test dependency to kfp (Kubeflow Pipelines SDK) to be at version 0.1.31.2.
Fixed trainer executor to correctly make transform_output optional.
Updated Chicago Taxi example dependency tensorflow to version >=1.14.0.
Updated Chicago Taxi example dependencies tensorflow-data-validation, tensorflow-metadata, tensorflow-model-analysis, tensorflow-serving-api, and tensorflow-transform to version >=0.14.
Updated Chicago Taxi example dependencies to Beam 2.14.0, Flink 1.8.1, Spark 2.4.3.
Adopted new recommended way to access component inputs/outputs as component.outputs['output_name'] (previously, the syntax was component.outputs.output_name).
Updated Iris example to skip transform and use Keras model.
Fixed the check for input artifact existence in base driver.
Fixed bug in AI Platform Pusher that prevents pushes after first model, and not being marked as default.
Replaced all usage of deprecated tensorflow.logging with absl.logging.
Used special user agent for all HTTP requests through googleapiclient and apitools.
Transform component updated to use tf.compat.v1 according to the TF 2.0 upgrading procedure.
TFX updated to use tf.compat.v1 according to the TF 2.0 upgrading procedure.
Added Kubeflow local example pipeline that executes components in-cluster.
Fixed a bug that prevents updating execution type.
Fixed a bug in model validator driver that reads across pipeline boundaries when resolving latest blessed model.
Depended on apache-beam[gcp]>=2.16,<3
Depended on ml-metadata>=0.15,<0.16
Depended on tensorflow>=1.15,<3
Depended on tensorflow-data-validation>=0.15,<0.16
Depended on tensorflow-model-analysis>=0.15.2,<0.16
Depended on tensorflow-transform>=0.15,<0.16
Depended on 'tfx_bsl>=0.15.1,<0.16'
Made launcher return execution information, containing populated inputs, outputs, and execution id.
Updated the default configuration for accessing MLMD from pipelines running in Kubeflow.
Updated Airflow developer tutorial
CSVExampleGen: started using the CSV decoding utilities in tfx-bsl (tfx-bsl>=0.15.2)
Added documentation for Fairness Indicators.

Deprecations

Deprecated component_type in favor of type.
Deprecated component_id in favor of id.
Move beam_pipeline_args out of additional_pipeline_args as top level pipeline param
Deprecated chicago_taxi folder, beam setup scripts and serving examples are moved to chicago_taxi_pipeline folder.

Breaking changes

Moved beam setup scripts from examples/chicago_taxi/ to examples/chicago_taxi_pipeline/
Moved interactive notebook classes into tfx.orchestration.experimental namespace.
Starting from 1.15, package tensorflow comes with GPU support. Users won't need to choose between tensorflow and tensorflow-gpu. If any GPU devices are available, processes spawned by all TFX components will try to utilize them; note that in rare cases, this may exhaust the memory of the device(s).
Caveat: tensorflow 2.0.0 is an exception and does not have GPU support. If tensorflow-gpu 2.0.0 is installed before installing tfx, it will be replaced with tensorflow 2.0.0. Re-install tensorflow-gpu 2.0.0 if needed.
Caveat: MLMD schema auto-upgrade is now disabled by default. For users who upgrades from 0.13 and do not want to lose the data in MLMD, please refer to MLMD documentation for guide to upgrade or downgrade MLMD database. Users who upgraded from TFX 0.14 should not be affected since there is not schema change between these two versions.

For pipeline authors

Deprecated the usage of tf.contrib.training.HParams in Trainer as it is deprecated in TF 2.0. User module relying on member method of that class will not be supported. Dot style property access will be the only supported style from now on.
Any SavedModel produced by tf.Transform <=0.14 using any tf.contrib ops (or tf.Transform ops that used tf.contrib ops such as tft.quantiles, tft.bucketize, etc.) cannot be loaded with TF 2.0 since the contrib library has been removed in 2.0. Please refer to this issue.

For component authors

Documentation updates

Added conceptual info on Artifacts to guide/index.md

Version 0.14.0

Major Features and Improvements

Added support for Google Cloud ML Engine Training and Serving as extension.
Supported pre-split input for ExampleGen components
Added ImportExampleGen component for importing tfrecord files with TF Example data format
Added a generic ExampleGen component to reduce the work of custom ExampleGen
Released Python 3 type hints and added support for Python 3.6 and 3.7.
Added an Airflow integration test for chicago_taxi_simple example.
Updated tfx docker image to use Python 3.6 on Ubuntu 16.04.
Added example for how to define and add a custom component.
Added PrestoExampleGen component.
Added Parquet executor for ExampleGen component.
Added Avro executor for ExampleGen component.
Enables Kubeflow Pipelines users to specify arbitrary ContainerOp decorators that can be applied to each pipeline step.
Added scripts and instructions for running the TFX Chicago Taxi example on Spark (via Apache Beam).
Introduced a new mechanism of artifact info passing between components that relies solely on ML Metadata.
Unified driver and execution logging to go through tf.logging.
Added support for Beam as an orchestrator.
Introduced the experimental InteractiveContext environment for iterative notebook development, as well as an example Chicago Taxi notebook in this environment with TFDV / TFMA examples.
Enabled Transform and Trainer components to specify user defined function (UDF) module by Python module path in addition to path to a module file.
Enable ImportExampleGen component for Kubeflow.
Enabled SchemaGen to infer feature shape.
Enabled metadata logging and pipeline caching capability for KubeflowRunner.
Used custom container for AI Platform Trainer extension.
Introduced ExecutorSpec, which generalizes the representation of executors to include both Python classes and containers.
Supported run context for metadata tracking of tfx pipeline.

Deprecations

Deprecated 'metadata_db_root' in favor of passing in metadata_connection_config directly.
airflow_runner.AirflowDAGRunner is renamed to airflow_dag_runner.AirflowDagRunner.
runner.KubeflowRunner is renamed to kubeflow_dag_runner.KubeflowDagRunner.
The "input" and "output" exec_properties fields for ExampleGen executors have been renamed to "input_config" and "output_config", respectively.
Declared 'cmle_training_args' on trainer and 'cmle_serving_args' on pusher deprecated. User should use the trainer/pusher executors in tfx.extensions.google_cloud_ai_platform module instead.
Moved tfx.orchestration.gcp.cmle_runner to tfx.extensions.google_cloud_ai_platform.runner.
Deprecated csv_input and tfrecord_input, use external_input instead.

Bug fixes and other changes

Updated components and code samples to use tft.TFTransformOutput ( introduced in tensorflow_transform 0.8). This avoids directly accessing the DatasetSchema object which may be removed in tensorflow_transform 0.14 or 0.15.
Fixed issue #113 to have consistent type of train_files and eval_files passed to trainer user module.
Fixed issue #185 preventing the Airflow UI from visualizing the component's subdag operators and logs.
Fixed issue #201 to make GCP credentials optional.
Bumped dependency to kfp (Kubeflow Pipelines SDK) to be at version at least 0.1.18.
Updated code example to
- use 'tf.data.TFRecordDataset' instead of the deprecated function 'tf.TFRecordReader'
- add test to train, evaluate and export.
Component definition streamlined with explicit ComponentSpec and new style for defining component classes.
TFX now depends on pyarrow>=0.14.0,<0.15.0 (through its dependency on tensorflow-data-validation).
Introduced 'examples' to the Trainer component API. It's recommended to use this field instead of 'transformed_examples' going forward.
Trainer can now run without the 'transform_output' input.
Added check for duplicated component ids within a pipeline.
String representations for Channel and Artifact (TfxType) classes were improved.
Updated workshop/setup/setup_demo.sh to fix version incompatibilities
Updated workshop by adding note and instructions to fix issue with GCC version when starting airflow webserver.
Prepared support for analyzer cache optimization in transform executor.
Fixed issue #463 correcting syntax in SCHEMA_EMPTY message.
Added an explicit check that pipeline name cannot exceed 63 characters.
SchemaGen takes a new argument, infer_feature_shape to indicate whether to infer shape of features in schema. Current default value is False, but we plan to remove default value for it in future.
Depended on 'click>=7.0,<8'
Depended on apache-beam[gcp]>=2.14,<3
Depended on ml-metadata>=-1.14.0,<0.15
Depended on tensorflow-data-validation>=0.14.1,<0.15
Depended on tensorflow-model-analysis>=0.14.0,<0.15
Depended on tensorflow-transform>=0.14.0,<0.15

Breaking changes

For pipeline authors

The "outputs" argument, which is used to override the automatically- generated output Channels for each component class has been removed; the equivalent overriding functionality is now available by specifying optional keyword arguments (see each component class definition for details).
The optional arguments "executor" and "unique_name" of component classes have been uniformly renamed to "executor_spec" and "instance_name", respectively.
The "driver" optional argument of component classes is no longer available: users who need to override the driver for a component should subclass the component and override the DRIVER_CLASS field.
The example_gen.component.ExampleGen class has been refactored into the example_gen.component._QueryBasedExampleGen and example_gen.component.FileBasedExampleGen classes.
pipeline_root passed to pipeline.Pipeline is now the root to the running pipeline instead of root of all pipelines.

For component authors

Component class definitions have been simplified; existing custom components need to:
- specify a ComponentSpec contract and conform to new class definition style (see base_component.BaseComponent)
- specify EXECUTOR_SPEC=ExecutorClassSpec(MyExecutor) in the component definition to replace executor=MyExecutor from component constructor.
Artifact definitions for standard TFX components have moved from using string type names into being concrete Artifact classes (see each official TFX component's ComponentSpec definition in types.standard_component_specs and the definition of built-in Artifact types in types.standard_artifacts).
The base_component.ComponentOutputs class has been renamed to base_component._PropertyDictWrapper.
The tfx.utils.types.TfxType class has been renamed to tfx.types.Artifact.
The tfx.utils.channel.Channel class has been moved to tfx.types.Channel.
The "static_artifact_collection" argument to types.Channel has been renamed to "artifacts".
ArtifactType for artifacts will have two new properties: pipeline_name and producer_component.
The ARTIFACT_STATE_* constants were consolidated into the types.artifacts.ArtifactState enum class.

Version 0.13.0

Major Features and Improvements

Adds support for Python 3.5
Initial version of following orchestration platform supported:
- Kubeflow
Added TensorFlow Model Analysis Colab example
Supported split ratio for ExampleGen components
Supported running a single executor independently

Bug fixes and other changes

Fixes issue #43 that prevent new execution in some scenarios
Fixes issue #47 that causes ImportError on chicago_taxi execution on dataflow
Depends on apache-beam[gcp]>=2.12,<3
Depends on tensorflow-data-validation>=0.13.1,<0.14
Depends on tensorflow-model-analysis>=0.13.2,<0.14
Depends on tensorflow-transform>=0.13,<0.14
Deprecations:
- PipelineDecorator is deprecated. Please construct a pipeline directly from a list of components instead.
Increased verbosity of logging to container stdout when running under Kubeflow Pipelines.
Updated developer tutorial to support Python 3.5+

Breaking changes

Examples code are moved from 'examples' to 'tfx/examples': this ensures that PyPi package contains only one top level python module 'tfx'.

Things to notice for upgrading

Multiprocessing on Mac OS >= 10.13 might crash for Airflow. See AIRFLOW-3326 for details and solution.

Version 0.12.0

Major Features and Improvements

Adding TFMA Architecture doc
TFX User Guide
Initial version of the following TFX components:
- CSVExampleGen - CSV data ingestion
- BigQueryExampleGen - BigQuery data ingestion
- StatisticsGen - calculates statistics for the dataset
- SchemaGen - examines the dataset and creates a data schema
- ExampleValidator - looks for anomalies and missing values in the dataset
- Transform - performs feature engineering on the dataset
- Trainer - trains the model
- Evaluator - performs analysis of the model performance
- ModelValidator - helps validate exported models ensuring that they are "good enough" to be pushed to production
- Pusher - deploys the model to a serving infrastructure, for example the TensorFlow Serving Model Server
Initial version of following orchestration platform supported:
- Apache Airflow
Polished examples based on the Chicago Taxi dataset.

Bug fixes and other changes

Cleanup Colabs to remove TF warnings
Performance improvement during shuffling of post-transform data.
Changing example to move everything to one file in plugins
Adding instructions to refer to README when running Chicago Taxi notebooks

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