Helm Chart for Apache Airflow¶
This chart will bootstrap an Airflow deployment on a Kubernetes cluster using the Helm package manager.
Kubernetes 1.20+ cluster
PV provisioner support in the underlying infrastructure (optionally)
Supported Airflow version:
Supported database backend:
CeleryExecutorprovided by KEDA
PostgreSQL and PgBouncer with a battle-tested configuration
StatsD/Prometheus metrics for Airflow
Prometheus metrics for PgBouncer
Automatic database migration after a new deployment
Administrator account creation during deployment
Kerberos secure configuration
One-command deployment for any type of executor. You don’t need to provide other services e.g. Redis/Database to test the Airflow.
Installing the Chart¶
To install this chart using Helm 3, run the following commands:
helm repo add apache-airflow https://airflow.apache.org helm upgrade --install airflow apache-airflow/airflow --namespace airflow --create-namespace
The command deploys Airflow on the Kubernetes cluster in the default configuration. The Parameters reference section lists the parameters that can be configured during installation.
List all releases using
Upgrading the Chart¶
To upgrade the chart with the release name
helm upgrade airflow apache-airflow/airflow --namespace airflow
To upgrade to a new version of the chart, run
helm repo update first.
Uninstalling the Chart¶
To uninstall/delete the
helm delete airflow --namespace airflow
The command removes all the Kubernetes components associated with the chart and deletes the release.
Some kubernetes resources created by the chart helm hooks might be left in the namespace after executing
helm uninstall, for example,
Installing the Chart with Argo CD, Flux or Terraform¶
When installing the chart using Argo CD, Flux, or Terraform, you MUST set the four following values, or your application will not start as the migrations will not be run:
createUserJob: useHelmHooks: false applyCustomEnv: false migrateDatabaseJob: useHelmHooks: false applyCustomEnv: false
This is so these CI/CD services can perform updates without issues and preserve the immutability of Kubernetes Job manifests.
This also applies if you install the chart using
--wait in your
helm install command.
While deploying this Helm chart with Argo, you might encounter issues with database migrations not running automatically on upgrade.
To run database migrations with Argo CD automatically, you will need to add:
migrateDatabaseJob: jobAnnotations: "argocd.argoproj.io/hook": Sync
This will run database migrations every time there is a
Sync event in Argo CD. While it is not ideal to run the migrations on every sync, it is a trade-off that allows them to be run automatically.
If you use the Celery(Kubernetes)Executor with the built-in Redis, it is recommended that you set up a static Redis password either by supplying