wooohooo..... ! On Thu, Feb 6, 2025 at 8:20β―PM Utkarsh Sharma <utkarsh.sha...@astronomer.io.invalid> wrote:
> Dear Airflow Community, > > I am thrilled to announce the availability of *Apache Airflow 3.0.0.alpha2* > for testing! Airflow 3.0 marks a significant milestone as the first major > release in over four years, introducing improvements that enhance user > experience, task execution, and system scalability. > First, a few caveats: > > - This is an *alpha release*, so do not run it in production. It may > contain significant issues, and you will likely need to reset your > database > between this and subsequent alpha, beta, or release candidate > versions. *(Consider > yourself warned!)* > - This release is intended for *Airflow developers and early adopters* > to test the build and start preparing for Airflow 3.0.0. This is *not an > official release*βthat will happen when we create a release candidate > and hold a vote. > - The *expected timeline* for the first release candidate is *the week > of 2025-03-31*, but we encourage early feedback to help stabilize the > release. > > What's New in 3.0.0.alpha2? > > Apache Airflow 3.0.0 introduces significant enhancements and breaking > changes. > *Notable Features* *DAG Versioning & Bundles* > > - Airflow now tracks *DAG versions*, offering better visibility into > historical DAG changes and execution states. > - *DAG Bundles* ensure tasks run with the correct code version, even as > DAGs evolve. > > *Modern Web Application* > > - The UI has been *rebuilt using React* and a complete *API-driven > structure*, improving maintainability and extensibility. > - A new *React-based plugin system* supports custom widgets, improved > workflow visibility, and integration with external tools. > > *Task Execution Interface* > > - Airflow 3.0 adopts a *client/server architecture*, decoupling task > execution from the internal meta-database via API-based interaction. > - This allows for *remote execution*, *multi-language support*, enhanced > security, and better dependency management. > - The *Edge Executor* enables seamless remote task execution without > direct database connections. > > *Data Assets & Asset-Centric Syntax* > > - Airflow 3.0 enhances dataset management by introducing *Data Assets*, > expanding beyond tables and files to include ML models and more. > - Assets can be explicitly defined using the @asset decorator, > simplifying tracking and dependencies. > > *External Event-Driven Scheduling* > > - Airflow now supports *event-driven DAG triggers* from external sources > like message queues. > - This builds upon dataset scheduling and enhances integration with the > external data ecosystem. > > For a more comprehensive list of new features, see the 3.0.0.alpha2 release > notes > < > https://github.com/apache/airflow/blob/3.0.0a2/RELEASE_NOTES.rst#airflow-300alpha2-2025-01-31 > > > . > > For a list of the breaking changes, visit: Apache Airflow Breaking Changes > <https://cwiki.apache.org/confluence/x/9pCMEw> > *Known Issues in 3.0.0.alpha2* *AIP-72 - Task Execution Interface* > > - *DB isolation in tasks* is not enforced yet. > - *KubernetesExecutor* does not yet use the Task Execution Interface. > - The following do not work on *LocalExecutor* or *CeleryExecutor*: > - Skip-based tasks (e.g. branch or skip operators). > - Task callbacks. > - *OpenLineage listeners* are not yet functional in this alpha release. > > *AIP-38 - Modern Web Application* > > - The new UI has *limited functionality* at this time and is still being > enhanced until GA. > - *FastAPI API server* (including the new UI and public API) does not > yet have authentication. > - UI performance may degrade with a *large number of DAGs* or *very big > DAGs*. > - Notable areas of functionality *not yet implemented* in the UI: > - DAG Versioning, Data Assets, Backfills, DAG Gantt View. > > *AIP-63 - DAG Versioning* > > - Callbacks are *not yet working* on the DAG Processor (e.g., DAG-level > callbacks). > - The concept of a separate --subdir in the DAG processor is being > replaced with *DAG Bundles*, but currently, the DAG processor always > parses all bundles. > > *AIP-82 - Event-Based Scheduling* > > - Some triggers (e.g., *file-based triggers*) may lead to *duplicate DAG > runs*. > > *Where to Get It?* > > The *alpha snapshot* is available at: Apache Airflow 3.0.0.alpha2 > Distribution <https://dist.apache.org/repos/dist/dev/airflow/3.0.0a2/> > > - *Binary Python "sdist" snapshot:* apache-airflow-3.0.0a2-bin.tar.gz > - *Binary Python wheel snapshot:* > apache_airflow-3.0.0a2-py3-none-any.whl > > This snapshot has *not been published to PyPI*. > > Also present are *alpha releases* for: > > - apache-airflow-task-sdk > - apache-airflow-providers-standard > - apache-airflow-providers-fab > - apache-airflow-providers-celery > > These *are also not published to PyPI*. > *Public Keys & Verification* > > Public keys for verification are available at: Apache Airflow KEYS > <https://www.apache.org/dist/airflow/KEYS> > *Installation Instructions* > > To build a virtualenv that installs this alpha release and required > packages: > > uv venv > > uv pip install --find-links > https://dist.apache.org/repos/dist/dev/airflow/3.0.0a2/ \ > apache-airflow==3.0.0a2 \ > apache-airflow-task-sdk==1.0.0a2 \ > apache-airflow-providers-standard==0.1.0a2 \ > apache-airflow-providers-fab==2.0.0a2 \ > apache-airflow-providers-celery==3.11.0a2 > > *Changes Youβll Need to Consider* > > - The *standalone DAG processor* is now required, start it with: > > airflow dag-processor > > - The new UI and public API start with: > > airflow fastapi-api > > UI is available at http://localhost:9091/webapp. > - Depending on your deployment setup, you may need to set the [workers] > execution_api_server_url config option. Default: > > http://localhost:9091/execution/ > > > *Get Involved* > > We encourage the community to *test this release* and report any issues or > feedback. Your contributions help us ensure a *stable and reliable Airflow > 3.0.0 release*. > > A huge *thank you* to all the contributors who have worked on this > milestone release! > > *Best,* > Utkarsh and Jed >
