Turn scripts into workflows and UIs in minutes

Install • Core Values • Full Values • Local S3 • Caveats • Kubernetes Tips

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Install

Have Helm 3 installed.

helm repo add windmill https://windmill-labs.github.io/windmill-helm-charts/
helm install mywindmill windmill/windmill -n windmill --create-namespace --values values.yaml

To update versions:

helm repo update windmill
helm upgrade mywindmill windmill/windmill -n windmill --values values.yaml

You do not need to provide a values.yaml to be able to test it on minikube. Follow the steps below.

When using a non super-user role for postgresql in databaseUrl

You will need to setup some required roles which would otherwise be done automatically when using a super-user role for the databaseUrl.

Follow those instructions

Test it on minikube

To make it work on a local minkube to test. Get the ip address of the ingress:

▶ kubectl get ingress -n windmill
NAME       CLASS    HOSTS                        ADDRESS        PORTS   AGE
windmill   <none>   windmill,windmill,windmill   192.168.49.2   80      13m

If not ip address is displayed, enable the ingress addon:

minikube addons enable ingress

Then modify /etc/hosts to match the baseDomain, by default 'windmill'.

E.g:

192.168.49.2   windmill

Then open your browser at http://windmill

Core Values

# windmill root values block
windmill:
  # domain as shown in browser, this is used together with `baseProtocol` as part of the BASE_URL environment variable in app and worker container and in the ingress resource, if enabled
  baseDomain: windmill
  baseProtocol: http
  # postgres URI, pods will crashloop if database is unreachable, sets DATABASE_URL environment variable in app and worker container
  databaseUrl: postgres://postgres:windmill@windmill-postgresql/windmill?sslmode=disable
  # replica for the application app
  appReplicas: 2
  # replicas for the workers, jobs are executed on the workers
  workerReplicas: 2
  # replicas for the lsp containers used by the app
  lspReplicas: 2
  # add additional worker groups
  workerGroups:
  # workers configuration
  - name: "gpu"
    ...
  # Use those to override the tag or image used for the app and worker containers. Windmill uses the same image for both.
  # By default, if enterprise is enable, the image is set to ghcr.io/windmill-labs/windmill-ee, otherwise the image is set to ghcr.io/windmill-labs/windmill
  #tag: "mytag"
  #image: "ghcr.io/windmill-labs/windmill"
  ...

# enable postgres (bitnami) on kubernetes
postgresql:
  enabled: true

# enable minio (bitnami) on kubernetes
minio:
  enabled: true

# Configure Ingress
ingress:
  className: ""
  ...

# enable enterprise features
enterprise:
  # -- enable windmill enterprise, requires license key.
  enabled: false
  # -- s3 bucket to use for dependency cache. Sets S3_CACHE_BUCKET environment variable in worker container
  s3CacheBucket: mybucketname
  # -- windmill provided Enterprise license key. Sets LICENSE_KEY environment variable in app and worker container.
  licenseKey: 123456F
  # -- use nsjail for sandboxing
  nsjail: false

Full Values

Key	Type	Default	Description
enterprise.enabled	bool	false	enable Windmill Enterprise , requires license key.
enterprise.enabledS3DistributedCache	bool	false
enterprise.licenseKey	string	"123456F"	Windmill provided Enterprise license key. Sets LICENSE_KEY environment variable in app and worker container.
enterprise.nsjail	bool	false	use nsjail for sandboxing
enterprise.s3CacheBucket	string	"mybucketname"	S3 bucket to use for dependency cache. Sets S3_CACHE_BUCKET environment variable in worker container
enterprise.samlMetadata	string	""	SAML Metadata URL to enable SAML SSO
enterprise.scimToken	string	""
ingress.annotations	object	{}
ingress.className	string	""
ingress.enabled	bool	true	enable/disable included ingress resource
ingress.tls	list	[]	TLS config for the ingress resource. Useful when using cert-manager and nginx-ingress
minio.auth.rootPassword	string	"windmill"
minio.auth.rootUser	string	"windmill"
minio.enabled	bool	false	enabled included Minio operator for s3 resource demo purposes
minio.fullnameOverride	string	"windmill-minio"
minio.mode	string	"standalone"
minio.primary.enabled	bool	true
postgresql.auth.database	string	"windmill"
postgresql.auth.postgresPassword	string	"windmill"
postgresql.enabled	bool	true	enabled included Postgres container for demo purposes only using bitnami
postgresql.fullnameOverride	string	"windmill-postgresql"
postgresql.primary.persistence.enabled	bool	true
serviceAccount.annotations	object	{}
serviceAccount.create	bool	true
serviceAccount.name	string	""
windmill.app.affinity	object	{}	Affinity rules to apply to the pods
windmill.app.annotations	object	{}	Annotations to apply to the pods
windmill.app.autoscaling.enabled	bool	false	enable or disable autoscaling
windmill.app.autoscaling.maxReplicas	int	10	maximum autoscaler replicas
windmill.app.autoscaling.targetCPUUtilizationPercentage	int	80	target CPU utilization
windmill.app.extraEnv	list	[]	Extra environment variables to apply to the pods
windmill.app.nodeSelector	object	{}	Node selector to use for scheduling the pods
windmill.app.resources	object	{}	Resource limits and requests for the pods
windmill.app.tolerations	list	[]	Tolerations to apply to the pods
windmill.appReplicas	int	2	replica for the application app
windmill.baseDomain	string	"windmill"	domain as shown in browser, this variable and baseProtocol are used as part of the BASE_URL environment variable in app and worker container and in the ingress resource, if enabled
windmill.baseProtocol	string	"http"	protocol as shown in browser, change to https etc based on your endpoint/ingress configuration, this variable and baseDomain are used as part of the BASE_URL environment variable in app and worker container
windmill.cookieDomain	string	""	domain to use for the cookies. Use it if windmill is hosted on a subdomain and you need to share the cookies with the hub for instance
windmill.createWorkspaceRequireSuperadmin	bool	false	is any user allowed to create workspaces
windmill.databaseUrl	string	"postgres://postgres:windmill@windmill-postgresql/windmill?sslmode=disable"	Postgres URI, pods will crashloop if database is unreachable, sets DATABASE_URL environment variable in app and worker container
windmill.databaseUrlSecretName	string	""	name of the secret storing the database URI, take precedence over databaseUrl. The key of the url is 'url'
windmill.exposeHostDocker	bool	false	mount the docker socket inside the container to be able to run docker command as docker client to the host docker daemon
windmill.globalErrorHandlerPath	string	""	if set, the path to a script in the admins workspace that will be triggered upon any jobs failure
windmill.image	string	""	windmill image tag, will use the Acorresponding ee or ce image from ghcr if not defined. Do not include tag in the image name.
windmill.instanceEventsWebhook	string	""	send instance events to a webhook. Can be hooked back to windmill
windmill.lsp.affinity	object	{}	Affinity rules to apply to the pods
windmill.lsp.annotations	object	{}	Annotations to apply to the pods
windmill.lsp.autoscaling.enabled	bool	false	enable or disable autoscaling
windmill.lsp.autoscaling.maxReplicas	int	10	maximum autoscaler replicas
windmill.lsp.autoscaling.targetCPUUtilizationPercentage	int	80	target CPU utilization
windmill.lsp.extraEnv	list	[]	Extra environment variables to apply to the pods
windmill.lsp.nodeSelector	object	{}	Node selector to use for scheduling the pods
windmill.lsp.resources	object	{}	Resource limits and requests for the pods
windmill.lsp.tag	string	"latest"
windmill.lsp.tolerations	list	[]	Tolerations to apply to the pods
windmill.lspReplicas	int	2	replicas for the lsp containers used by the app
windmill.multiplayer.affinity	object	{}	Affinity rules to apply to the pods
windmill.multiplayer.annotations	object	{}	Annotations to apply to the pods
windmill.multiplayer.autoscaling.enabled	bool	false	enable or disable autoscaling
windmill.multiplayer.autoscaling.maxReplicas	int	10	maximum autoscaler replicas
windmill.multiplayer.autoscaling.targetCPUUtilizationPercentage	int	80	target CPU utilization
windmill.multiplayer.extraEnv	list	[]	Extra environment variables to apply to the pods
windmill.multiplayer.nodeSelector	object	{}	Node selector to use for scheduling the pods
windmill.multiplayer.resources	object	{}	Resource limits and requests for the pods
windmill.multiplayer.tag	string	"latest"
windmill.multiplayer.tolerations	list	[]	Tolerations to apply to the pods
windmill.multiplayerReplicas	int	2	replicas for the lsp containers used by the app
windmill.npmConfigRegistry	string	""	pass the npm for private registries
windmill.oauthConfig	string	"{}\n"	raw oauth config. See https://docs.windmill.dev/docs/misc/setup_oauth
windmill.oauthSecretName	string	""	name of the secret storing the oauthConfig. See https://docs.windmill.dev/docs/misc/setup_oauth
windmill.pipExtraIndexUrl	string	""	pass the extra index url to pip for private registries
windmill.pipIndexUrl	string	""	pass the index url to pip for private registries
windmill.pipTrustedHost	string	""	pass the trusted host to pip for private registries
windmill.rustLog	string	"info"	rust log level, set to debug for more information etc, sets RUST_LOG environment variable in app and worker container
windmill.smtp	object	{"enabled":false,"from":"noreply@windmill.dev","host":"smtp.gmail.com","password":"bar","port":587,"tls_implicit":false,"username":"ruben@windmill.dev"}	set smtp configs for windmill to be able to send emails when adding users to instance and workspaces
windmill.tag	string	""	windmill app image tag, will use the App version if not defined
windmill.workerGroups[0].affinity	object	{}	Affinity rules to apply to the pods
windmill.workerGroups[0].annotations	object	{}	Annotations to apply to the pods
windmill.workerGroups[0].extraEnv	list	[]	Extra environment variables to apply to the pods
windmill.workerGroups[0].name	string	"gpu"
windmill.workerGroups[0].nodeSelector	object	{}	Node selector to use for scheduling the pods
windmill.workerGroups[0].replicas	int	0
windmill.workerGroups[0].resources	object	{}	Resource limits and requests for the pods
windmill.workerGroups[0].tolerations	list	[]	Tolerations to apply to the pods
windmill.workerReplicas	int	2	replicas for the workers, jobs are executed on the workers
windmill.workers.affinity	object	{}	Affinity rules to apply to the pods
windmill.workers.annotations	object	{}	Annotations to apply to the pods
windmill.workers.autoscaling.enabled	bool	false	will not benefit from the global cache and the performances will be poor for newly spawned pods
windmill.workers.autoscaling.maxReplicas	int	10	maximum autoscaler replicas
windmill.workers.autoscaling.targetCPUUtilizationPercentage	int	80	target CPU utilization
windmill.workers.extraEnv	list	[]	Extra environment variables to apply to the pods
windmill.workers.nodeSelector	object	{}	Node selector to use for scheduling the pods
windmill.workers.resources	object	{}	Resource limits and requests for the pods
windmill.workers.tolerations	list	[]	Tolerations to apply to the pods

Local S3

The chart includes a Minio S3 distribution to demonstrate the usage of S3 as a resource in a vendor-agnostic environment like Kubernetes. The local Minio S3 service will be available to the Windmill workers through its Kubernetes service, which is set to "windmill-minio" by default. In the Resources page, you should create an S3 API Connection Object, and import it as a connection object to reduce code duplication between scripts. For the sake of this example, this stage is skipped. Below is an example of how to authenticate and use the provided local S3 distribution in a Python script running in Windmill:

from minio import Minio

def main():
    # Create a client with the MinIO server, its access key
    # and secret key.
    client = Minio(
        "windmill-minio", # Local Kubernetes Service
        access_key="windmill",
        secret_key="windmill",
    )

    # Make 'demo' bucket if not exist.
    found = client.bucket_exists("demo")
    if not found:
        client.make_bucket("demo")
    else:
        print("Bucket 'demo' already exists")

    with open('readme.txt', 'w') as f:
        f.write('Create a new text file!')

    client.fput_object(
        "demo", "readme.txt", "readme.txt",
    )

    print(
        "'readme.txt' is successfully uploaded as "
        "object 'readme.txt' to bucket 'demo'."
    )

Enterprise features

To use the enterprise version with the provided upon subscription, add the following to the values.yaml file:

enterprise:
  enabled: true
  licenseKey: <license key>

S3 Cache

Enterprise users can use S3 storage for dependency caching for performance. Cache is two way synced at regular intervals (10 minutes). To use it, the worker deployment requires access to an S3 bucket. There are several ways to do this:

1. On AWS (and EKS) , you can use a service account with IAM roles attached. See AWS docs - once you have a policy , you can create an account via eksctl for instance

   eksctl create iamserviceaccount --name serviceaccountname --namespace production --cluster windmill-cluster --role-name "iamrolename" \ --attach-policy-arn arn:aws:iam::12312315:policy/bucketpolicy --approve

2. Mount/attach a credentials file in /root/.aws/credentials of the worker deployment

3. Add environment variables for the AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY, via kube secrets.

The sync relies on rclone and uses its methods of authentication to s3 per Rclone documentation

Then the values settings become:

enterprise:
  enabled: true
  licenseKey: <license key>
  enabledS3DistributedCache: true
  s3CacheBucket: mybucketname

Caveats

• Postgres is included for demo purposes, it is a stateful set with a small volume claim applied. If you want to host postgres in k8s, there are better ways, or offload it outside your k8s cluster. Postgres can be disabled entirely in the values.yaml file.
• The postgres user/pass is currently not a secret/encrypted

Kubernetes Hosting Tips

The helm chart does have an ingress configuration included. It's enabled by default. The ingress uses the windmill.baseDomain variable for its hostname configuration. Here are two example configurations for an AWS ALB and nginx-ingress/cert-manager:

AWS ALB:

windmill:
  baseDomain: "windmill.example.com"
  ...

ingress:
  className: "alb"
  annotations:
    alb.ingress.kubernetes.io/scheme: internet-facing
    alb.ingress.kubernetes.io/tags: Environment=dev,Team=test
    alb.ingress.kubernetes.io/target-type: ip
    alb.ingress.kubernetes.io/target-group-attributes: stickiness.enabled=true,stickiness.lb_cookie.duration_seconds=604800,stickiness.type=lb_cookie
    alb.ingress.kubernetes.io/load-balancer-attributes: idle_timeout.timeout_seconds=600
    alb.ingress.kubernetes.io/group.name: windmill
    alb.ingress.kubernetes.io/group.order: '10'
    alb.ingress.kubernetes.io/certificate-arn: my-certificatearn
...

nginx ingress + cert-manager:

windmill:
  baseDomain: "windmill.example.com"
  ...

ingress:
  className: "nginx"
  tls:
    - hosts:
        - "windmill.example.com"
      secretName: windmill-tls-cert
  annotations:
    cert-manager.io/issuer: "letsencrypt-prod"
    nginx.ingress.kubernetes.io/affinity: "cookie"
    nginx.ingress.kubernetes.io/affinity-mode: "persistent"
    nginx.ingress.kubernetes.io/session-cookie-name: "route"
...

There are many ways to expose an app and it will depend on the requirements of your environment. If you don't want to use the included ingress and roll your own, you can just disable it. Overall, you want the following endpoints accessible included in the chart:

• windmill app on port 8000
• lsp application on port 3001
• metrics endpoints on port 8001 for the app and workers (ee only)

If you are using Prometheus and if the enterprise edition is enabled, you can scrape the windmill-app-metrics service on port 8001 at /metrics endpoint to gather stats about the Windmill application.