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Version: 0.26

Astronomer v0.26 Release Notes


This document includes all release notes for Astronomer Software v0.26.

Astronomer v0.27 is the latest Stable version of Astronomer Software, while v0.28 remains the latest long-term support (LTS) version. To upgrade to Astronomer v0.26 from v0.25, read Upgrade to v0.26. For more information about Software release channels, read Release and Lifecycle Policies.

We're committed to testing all Astronomer Software versions for scale, reliability and security on Amazon EKS, Google GKE and Azure AKS. If you have any questions or an issue to report, don't hesitate to reach out to us.


Release date: March 1, 2022

Additional improvements

  • Fixed several CVEs
  • Updated documentation links in the UI to point to Software documentation


Release date: January 10, 2022

Bug Fixes

  • Fixed an issue where users could not create Deployments via an IAM role


Release date: December 11, 2021

Bug Fixes

  • Remediated CVE-2021-44228 related to Log4J by setting ES_JAVA_OPTS=-Dlog4j2.formatMsgNoLookups=true at runtime for all ElasticSearch containers


Release date: November 22, 2021

Support for Airflow 2.2.0

Apache Airflow 2.2.0 is an exciting milestone in the open source project. Most notably, this release introduces custom timetables and deferrable operators.

Custom Timetables

Timetables are a powerful new framework that you can use to create custom schedules using Python. In an effort to provide more flexibility and address known limitations imposed by cron, timetables use an intuitive data_interval that, for example, allows you to schedule a DAG to run daily on Monday through Friday, but not on the weekend. Timetables can be easily plugged into existing DAGs, which means that it's easy to create your own or use community-developed timetables in your project.

For more information on using timetables, read the Apache Airflow Documentation.

Deferrable Operators

Deferrable operators are a new type of Airflow operator that promises improved performance and lower resource costs. While standard operators and sensors take up a Worker or Scheduler slot even when they are waiting for an external trigger, deferrable operators are designed to suspend themselves and free up that Worker or Scheduler slot while they wait. This is made possible by a new, lightweight Airflow component called the Triggerer.

As part of supporting deferrable operators, you can provision multiple Triggerers on your Astronomer Deployments. By provisioning multiple Triggerers, you can ensure that tasks using Deferrable Operators are run even when one Triggerer goes down. For more information about configuring Triggerers and other resources, see Configure a Deployment.

CLI Verbosity Flag

You can now specify a --verbosity flag for all Astronomer CLI commands. When you specify this flag with a CLI command, the CLI prints out Logrus logs as the command runs. This is useful for debugging any errors that might result from a CLI command.

The flag prints out different levels of logs depending on the value that you pass it. Each possible value (debug, info, warn, error, fatal, and panic) maps to a different Logrus logging level. For more information about these logging levels, read the Logrus documentation.

Minor Improvements

  • You can now create a custom set of cluster-level permissions for the Astronomer Commander service by setting false in your config.yaml file and pushing a new RoleBinding to a pre-created Kubernetes namespace.
  • In the astronomer.houston.config section of your config.yaml file, you can now configure a list of allowedSystemLevelDomains []. If you configure this list, only users with emails from domains specified in the list (for example, <company>.com) can be granted System Admin privileges.
  • Greatly improved load times for the System Admin page in the UI.
  • You can now specify a node port for 3rd party ingress controllers with a service type of nodePort.
  • The naming format of service account pods has been changed from <release-name>-dags-prod-worker-serviceaccount to release_name-dags-prod-airflow-worker.

Bug Fixes

  • Fixed an issue where you could not update an existing Deployment's IAM role via the Astronomer CLI
  • Fixed an issue where Deployments would not work on clusters with custom domains
  • Fixed error handling when interacting with a Deployment that wasn't fully spun up
  • Added a new validation step for Airflow Helm chart values configured in the astronomer.houston.config.deployments.helm.airflow section of config.yaml