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Updating Airflow

This file documents any backwards-incompatible changes in Airflow and assists people when migrating to a new version.

Airflow 1.8

Changes to Behavior

New DAGs are paused by default

Previously, new DAGs would be scheduled immediately. To retain the old behavior, add this to airflow.cfg:

[core]
dags_are_paused_at_creation = False

Google Cloud Operator and Hook alignment

All Google Cloud Operators and Hooks are aligned and use the same client library. Now you have a single connection type for all kinds of Google Cloud Operators.

If you experience problems connecting with your operator make sure you set the connection type "Google Cloud Platform".

Also the old P12 key file type is not supported anymore and only the new JSON key files are supported as a service account.

Deprecated Features

These features are marked for deprecation. They may still work (and raise a DeprecationWarning), but are no longer supported and will be removed entirely in Airflow 2.0

  • Hooks and operators must be imported from their respective submodules

    airflow.operators.PigOperator is no longer supported; from airflow.operators.pig_operator import PigOperator is. (AIRFLOW-31, AIRFLOW-200)

  • Operators no longer accept arbitrary arguments

    Previously, Operator.__init__() accepted any arguments (either positional *args or keyword **kwargs) without complaint. Now, invalid arguments will be rejected. (apache#1285)

Airflow 1.7.1.2

Changes to Configuration

Email configuration change

To continue using the default smtp email backend, change the email_backend line in your config file from:

[email]
email_backend = airflow.utils.send_email_smtp

to:

[email]
email_backend = airflow.utils.email.send_email_smtp

S3 configuration change

To continue using S3 logging, update your config file so:

s3_log_folder = s3://my-airflow-log-bucket/logs

becomes:

remote_base_log_folder = s3://my-airflow-log-bucket/logs
remote_log_conn_id = <your desired s3 connection>