Astronomer's Helm Chart for Apache Airflow
This chart will bootstrap an Airflow deployment on a Kubernetes cluster using the Helm package manager.
The version of this chart does not correlate to any other component. If it happens to align with OSS airflow that is just a coincidence. Users should not expect feature parity between OSS airflow chart and the Astronomer airflow-chart for identical version numbers.
Quickstart
To install this helm chart remotely (using helm 3)
kubectl create namespace airflow
helm repo add astronomer https://helm.astronomer.io
helm install airflow --namespace airflow astronomer/airflow
To install this repository from source
kubectl create namespace airflow
helm install --namespace airflow .
Prerequisites
- Kubernetes 1.12+
- Helm 3.6+
- PV provisioner support in the underlying infrastructure
Installing the Chart
To install the chart with the release name my-release
:
helm install --name my-release .
The command deploys Airflow on the Kubernetes cluster in the default configuration. The Parameters section lists the parameters that can be configured during installation.
Tip: List all releases using
helm list
Upgrading the Chart
First, look at the updating documentation to identify any backwards-incompatible changes.
To upgrade the chart with the release name my-release
:
helm upgrade --name my-release .
Uninstalling the Chart
To uninstall/delete the my-release
deployment:
helm delete my-release
The command removes all the Kubernetes components associated with the chart and deletes the release.
Updating DAGs
Bake DAGs in Docker image
The recommended way to update your DAGs with this chart is to build a new docker image with the
latest code (docker build -t my-company/airflow:8a0da78 .
), push it to an accessible
registry (docker push my-company/airflow:8a0da78
), then update the Airflow pods with that image:
helm upgrade my-release . \
--set images.airflow.repository=my-company/airflow \
--set images.airflow.tag=8a0da78
Docker Images
- The Airflow image that are referenced as the default values in this chart are generated from this repository: https://github.com/astronomer/ap-airflow.
- Other non-airflow images used in this chart are generated from this repository: https://github.com/astronomer/ap-vendor.
Parameters
The complete list of parameters supported by the community chart can be found on the Parameteres Reference page, and can be set under the airflow
key in this chart.
The following tables lists the configurable parameters of the Astronomer chart and their default values.
Parameter | Description | Default |
---|---|---|
ingress.enabled |
Enable Kubernetes Ingress support | false |
ingress.acme |
Add acme annotations to Ingress object | false |
ingress.tlsSecretName |
Name of secret that contains a TLS secret | ~ |
ingress.webserverAnnotations |
Annotations added to Webserver Ingress object | {} |
ingress.flowerAnnotations |
Annotations added to Flower Ingress object | {} |
ingress.baseDomain |
Base domain for VHOSTs | ~ |
ingress.auth.enabled |
Enable auth with Astronomer Platform | true |
extraObjects |
Extra K8s Objects to deploy (these are passed through tpl ). More about Extra Objects. |
[] |
sccEnabled |
Enable security context constraints required for OpenShift | false |
authSidecar.enabled |
Enable authSidecar | false |
authSidecar.repository |
The image for the auth sidecar proxy | nginxinc/nginx-unprivileged |
authSidecar.tag |
The image tag for the auth sidecar proxy | stable |
authSidecar.pullPolicy |
The K8s pullPolicy for the the auth sidecar proxy image | IfNotPresent |
authSidecar.port |
The port the auth sidecar exposes | 8084 |
gitSyncRelay.enabled |
Enables git sync relay feature. | False |
gitSyncRelay.repo.url |
Upstream URL to the git repo to clone. | ~ |
gitSyncRelay.repo.branch |
Branch of the upstream git repo to checkout. | main |
gitSyncRelay.repo.depth |
How many revisions to check out. Leave as default 1 except in dev where history is needed. |
1 |
gitSyncRelay.repo.wait |
Seconds to wait before pulling from the upstream remote. | 60 |
gitSyncRelay.repo.subPath |
Path to the dags directory within the git repository. | ~ |
Specify each parameter using the --set key=value[,key=value]
argument to helm install
. For example,
helm install --name my-release \
--set executor=CeleryExecutor \
--set enablePodLaunching=false .
Walkthrough using kind
Install kind, and create a cluster
We recommend testing with Kubernetes 1.25+, example:
kind create cluster --image kindest/node:v1.25.11
Confirm it's up:
kubectl cluster-info --context kind-kind
Add Astronomer's Helm repo
helm repo add astronomer https://helm.astronomer.io
helm repo update
Create namespace + install the chart
kubectl create namespace airflow
helm install airflow -n airflow astronomer/airflow
It may take a few minutes. Confirm the pods are up:
kubectl get pods --all-namespaces
helm list -n airflow
Run kubectl port-forward svc/airflow-webserver 8080:8080 -n airflow
to port-forward the Airflow UI to http://localhost:8080/ to confirm Airflow is working.
Login as admin and password admin.
Build a Docker image from your DAGs
-
Start a project using astro-cli, which will generate a Dockerfile, and load your DAGs in. You can test locally before pushing to kind with
astro airflow start
.mkdir my-airflow-project && cd my-airflow-project astro dev init
-
Then build the image:
docker build -t my-dags:0.0.1 .
-
Load the image into kind:
kind load docker-image my-dags:0.0.1
-
Upgrade Helm deployment:
helm upgrade airflow -n airflow \ --set images.airflow.repository=my-dags \ --set images.airflow.tag=0.0.1 \ astronomer/airflow
Extra Objects
This chart can deploy extra Kubernetes objects (assuming the role used by Helm can manage them). For Astronomer Cloud and Enterprise, the role permissions can be found in the Commander role.
extraObjects:
- apiVersion: batch/v1beta1
kind: CronJob
metadata:
name: "{{ .Release.Name }}-somejob"
spec:
schedule: "*/10 * * * *"
concurrencyPolicy: Forbid
jobTemplate:
spec:
template:
spec:
containers:
- name: myjob
image: ubuntu
command:
- echo
args:
- hello
restartPolicy: OnFailure
Contributing
Check out our contributing guide!
License
Apache 2.0 with Commons Clause