Kubeflow Manifests

Table of Contents

• Overview
• Kubeflow components versions
• Installation
  • Prerequisites
  • Install with a single command
  • Install individual components
  • Connect to your Kubeflow Cluster
  • Change default user password
• Release process
• Frequently Asked Questions

Overview

This repo is owned by the Manifests Working Group. If you are a contributor authoring or editing the packages please see Best Practices.

The Kubeflow Manifests repository is organized under three (3) main directories, which include manifests for installing:

Directory	Purpose
apps	Kubeflow's official components, as maintained by the respective Kubeflow WGs
common	Common services, as maintained by the Manifests WG
contrib	3rd party contributed applications, which are maintained externally and are not part of a Kubeflow WG

The distributions directory contains manifests for specific, opinionated distributions of Kubeflow, and will be phased out during the 1.4 release, since going forward distributions will maintain their manifests on their respective external repositories.

The docs, hack, and tests directories will also be gradually phased out.

Starting from Kubeflow 1.3, all components should be deployable using kustomize only. Any automation tooling for deployment on top of the manifests should be maintained externally by distribution owners.

Kubeflow components versions

Kubeflow Version: latest

This repo periodically syncs all official Kubeflow components from their respective upstream repos. The following matrix shows the git version that we include for each component:

Component	Local Manifests Path	Upstream Revision
Training Operator	apps/training-operator/upstream	v1.6.0-rc.0
Notebook Controller	apps/jupyter/notebook-controller/upstream	v1.7.0-rc.0
Tensorboard Controller	apps/tensorboard/tensorboard-controller/upstream	v1.7.0-rc.0
Central Dashboard	apps/centraldashboard/upstream	v1.7.0-rc.0
Profiles + KFAM	apps/profiles/upstream	v1.7.0-rc.0
PodDefaults Webhook	apps/admission-webhook/upstream	v1.7.0-rc.0
Jupyter Web App	apps/jupyter/jupyter-web-app/upstream	v1.7.0-rc.0
Tensorboards Web App	apps/tensorboard/tensorboards-web-app/upstream	v1.7.0-rc.0
Volumes Web App	apps/volumes-web-app/upstream	v1.7.0-rc.0
Katib	apps/katib/upstream	v0.15.0-rc.0
KServe	contrib/kserve/kserve	v0.10.0
KServe Models Web App	contrib/kserve/models-web-app	v0.10.0
Kubeflow Pipelines	apps/pipeline/upstream	2.0.0-alpha.7
Kubeflow Tekton Pipelines	apps/kfp-tekton/upstream	v1.5.1

The following is also a matrix with versions from common components that are used from the different projects of Kubeflow:

Component	Local Manifests Path	Upstream Revision
Istio	common/istio-1-16	1.16.0
Knative	common/knative/knative-serving common/knative/knative-eventing	1.8.1 1.8.1
Cert Manager	common/cert-manager	1.10.1

Installation

The Manifests WG provides two options for installing Kubeflow official components and common services with kustomize. The aim is to help end users install easily and to help distribution owners build their opinionated distributions from a tested starting point:

1. Single-command installation of all components under apps and common
2. Multi-command, individual components installation for apps and common

Option 1 targets ease of deployment for end users.
Option 2 targets customization and ability to pick and choose individual components.

The example directory contains an example kustomization for the single command to be able to run.

⚠️ In both options, we use a default email (user@example.com) and password (12341234). For any production Kubeflow deployment, you should change the default password by following the relevant section.

Prerequisites

• Kubernetes (up to 1.25) with a default StorageClass
• kustomize 5.0.0
  • ⚠️ Kubeflow is not compatible with earlier versions of Kustomize. This is because we need the sortOptions field, which is only available in Kustomize 5 and onwards kubeflow#2388.
• kubectl

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NOTE

kubectl apply commands may fail on the first try. This is inherent in how Kubernetes and kubectl work (e.g., CR must be created after CRD becomes ready). The solution is to simply re-run the command until it succeeds. For the single-line command, we have included a bash one-liner to retry the command.

The reason we do awk '!/well-defined/' is because there's a regression in Kustomize 5 and a line is printed in stdout and not stderr kubernetes-sigs/kustomize#5039. We'll remove this command once a future patch version of Kustomize is available.

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Install with a single command

You can install all Kubeflow official components (residing under apps) and all common services (residing under common) using the following command:

while ! kustomize build example | awk '!/well-defined/' | kubectl apply -f -; do echo "Retrying to apply resources"; sleep 10; done

Once, everything is installed successfully, you can access the Kubeflow Central Dashboard by logging in to your cluster.

Congratulations! You can now start experimenting and running your end-to-end ML workflows with Kubeflow.

Install individual components

In this section, we will install each Kubeflow official component (under apps) and each common service (under common) separately, using just kubectl and kustomize.

If all the following commands are executed, the result is the same as in the above section of the single command installation. The purpose of this section is to:

• Provide a description of each component and insight on how it gets installed.
• Enable the user or distribution owner to pick and choose only the components they need.

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Troubleshooting note

We've seen errors like the following when applying the kustomizations of different components:

error: resource mapping not found for name: "<RESOURCE_NAME>" namespace: "<SOME_NAMESPACE>" from "STDIN": no matches for kind "<CRD_NAME>" in version "<CRD_FULL_NAME>"
ensure CRDs are installed first

This is because a kustomization applies both a CRD and a CR very quickly, and the CRD hasn't become Established yet. You can learn more about this in kubernetes/kubectl#1117 and helm/helm#4925.

If you bump into this error we advise to re-apply the kustomization of the component.

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cert-manager

cert-manager is used by many Kubeflow components to provide certificates for admission webhooks.

Install cert-manager:

kustomize build common/cert-manager/cert-manager/base | kubectl apply -f -
kubectl wait --for=condition=ready pod -l 'app in (cert-manager,webhook)' --timeout=180s -n cert-manager
kustomize build common/cert-manager/kubeflow-issuer/base | kubectl apply -f -

In case you get this error:

Error from server (InternalError): error when creating "STDIN": Internal error occurred: failed calling webhook "webhook.cert-manager.io": failed to call webhook: Post "https://cert-manager-webhook.cert-manager.svc:443/mutate?timeout=10s": dial tcp 10.96.202.64:443: connect: connection refused

This is because the webhook is not yet ready to receive request. Wait a couple seconds and retry applying the manfiests.

For more troubleshooting info also check out https://cert-manager.io/docs/troubleshooting/webhook/

Istio

Istio is used by many Kubeflow components to secure their traffic, enforce network authorization and implement routing policies.

Install Istio:

kustomize build common/istio-1-16/istio-crds/base | kubectl apply -f -
kustomize build common/istio-1-16/istio-namespace/base | kubectl apply -f -
kustomize build common/istio-1-16/istio-install/base | kubectl apply -f -

Dex

Dex is an OpenID Connect Identity (OIDC) with multiple authentication backends. In this default installation, it includes a static user with email user@example.com. By default, the user's password is 12341234. For any production Kubeflow deployment, you should change the default password by following the relevant section.

Install Dex:

kustomize build common/dex/overlays/istio | kubectl apply -f -

OIDC AuthService

The OIDC AuthService extends your Istio Ingress-Gateway capabilities, to be able to function as an OIDC client:

kustomize build common/oidc-authservice/base | kubectl apply -f -

Knative

Knative is used by the KServe official Kubeflow component.

Install Knative Serving:

kustomize build common/knative/knative-serving/overlays/gateways | kubectl apply -f -
kustomize build common/istio-1-16/cluster-local-gateway/base | kubectl apply -f -

Optionally, you can install Knative Eventing which can be used for inference request logging:

kustomize build common/knative/knative-eventing/base | kubectl apply -f -

Kubeflow Namespace

Create the namespace where the Kubeflow components will live in. This namespace is named kubeflow.

Install kubeflow namespace:

kustomize build common/kubeflow-namespace/base | kubectl apply -f -

Kubeflow Roles

Create the Kubeflow ClusterRoles, kubeflow-view, kubeflow-edit and kubeflow-admin. Kubeflow components aggregate permissions to these ClusterRoles.

Install kubeflow roles:

kustomize build common/kubeflow-roles/base | kubectl apply -f -

Kubeflow Istio Resources

Create the Istio resources needed by Kubeflow. This kustomization currently creates an Istio Gateway named kubeflow-gateway, in namespace kubeflow. If you want to install with your own Istio, then you need this kustomization as well.

Install istio resources:

kustomize build common/istio-1-16/kubeflow-istio-resources/base | kubectl apply -f -

Kubeflow Pipelines

Install the Multi-User Kubeflow Pipelines official Kubeflow component:

kustomize build apps/pipeline/upstream/env/cert-manager/platform-agnostic-multi-user | awk '!/well-defined/' | kubectl apply -f -

This installs argo with the safe-to use runasnonroot emissary executor. Please note that the installer is still responsible to analyze the security issues that arise when containers are run with root access and to decide if the kubeflow pipeline main containers are run as runasnonroot. It is strongly recommended that the pipelines main containers are installed and run as runasnonroot and without any special capabilities to mitigate security risks.

Do not use the deprecated and insecure PNS executor anymore

kustomize build apps/pipeline/upstream/env/platform-agnostic-multi-user-pns | kubectl apply -f -

Refer to argo workflow executor documentation for further reasoning.

Multi-User Kubeflow Pipelines dependencies

• Istio + Kubeflow Istio Resources
• Kubeflow Roles
• OIDC Auth Service (or cloud provider specific auth service)
• Profiles + KFAM

Alternative: Kubeflow Pipelines Standalone

You can install Kubeflow Pipelines Standalone which

• does not support multi user separation
• has no dependencies on the other services mentioned here

You can learn more about their differences in Installation Options for Kubeflow Pipelines .

Besides installation instructions in Kubeflow Pipelines Standalone documentation, you need to apply two virtual services to expose Kubeflow Pipelines UI and Metadata API in kubeflow-gateway.

KServe

KFServing was rebranded to KServe.

Install the KServe component:

kustomize build contrib/kserve/kserve | kubectl apply -f -

Install the Models web app:

kustomize build contrib/kserve/models-web-app/overlays/kubeflow | kubectl apply -f -

• ../contrib/kserve/models-web-app/overlays/kubeflow

Katib

Install the Katib official Kubeflow component:

kustomize build apps/katib/upstream/installs/katib-with-kubeflow | kubectl apply -f -

Central Dashboard

Install the Central Dashboard official Kubeflow component:

kustomize build apps/centraldashboard/upstream/overlays/kserve | kubectl apply -f -

Admission Webhook

Install the Admission Webhook for PodDefaults:

kustomize build apps/admission-webhook/upstream/overlays/cert-manager | kubectl apply -f -

Notebooks

Install the Notebook Controller official Kubeflow component:

kustomize build apps/jupyter/notebook-controller/upstream/overlays/kubeflow | kubectl apply -f -

Install the Jupyter Web App official Kubeflow component:

kustomize build apps/jupyter/jupyter-web-app/upstream/overlays/istio | kubectl apply -f -

Profiles + KFAM

Install the Profile Controller and the Kubeflow Access-Management (KFAM) official Kubeflow components:

kustomize build apps/profiles/upstream/overlays/kubeflow | kubectl apply -f -

Volumes Web App

Install the Volumes Web App official Kubeflow component:

kustomize build apps/volumes-web-app/upstream/overlays/istio | kubectl apply -f -

Tensorboard

Install the Tensorboards Web App official Kubeflow component:

kustomize build apps/tensorboard/tensorboards-web-app/upstream/overlays/istio | kubectl apply -f -

Install the Tensorboard Controller official Kubeflow component:

kustomize build apps/tensorboard/tensorboard-controller/upstream/overlays/kubeflow | kubectl apply -f -

Training Operator

Install the Training Operator official Kubeflow component:

kustomize build apps/training-operator/upstream/overlays/kubeflow | kubectl apply -f -

User Namespace

Finally, create a new namespace for the the default user (named kubeflow-user-example-com).

kustomize build common/user-namespace/base | kubectl apply -f -

Connect to your Kubeflow Cluster

After installation, it will take some time for all Pods to become ready. Make sure all Pods are ready before trying to connect, otherwise you might get unexpected errors. To check that all Kubeflow-related Pods are ready, use the following commands:

kubectl get pods -n cert-manager
kubectl get pods -n istio-system
kubectl get pods -n auth
kubectl get pods -n knative-eventing
kubectl get pods -n knative-serving
kubectl get pods -n kubeflow
kubectl get pods -n kubeflow-user-example-com

Port-Forward

The default way of accessing Kubeflow is via port-forward. This enables you to get started quickly without imposing any requirements on your environment. Run the following to port-forward Istio's Ingress-Gateway to local port 8080:

kubectl port-forward svc/istio-ingressgateway -n istio-system 8080:80

After running the command, you can access the Kubeflow Central Dashboard by doing the following:

1. Open your browser and visit http://localhost:8080. You should get the Dex login screen.
2. Login with the default user's credential. The default email address is user@example.com and the default password is 12341234.

NodePort / LoadBalancer / Ingress

In order to connect to Kubeflow using NodePort / LoadBalancer / Ingress, you need to setup HTTPS. The reason is that many of our web apps (e.g., Tensorboard Web App, Jupyter Web App, Katib UI) use Secure Cookies, so accessing Kubeflow with HTTP over a non-localhost domain does not work.

Exposing your Kubeflow cluster with proper HTTPS is a process heavily dependent on your environment. For this reason, please take a look at the available Kubeflow distributions, which are targeted to specific environments, and select the one that fits your needs.

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NOTE

If you absolutely need to expose Kubeflow over HTTP, you can disable the Secure Cookies feature by setting the APP_SECURE_COOKIES environment variable to false in every relevant web app. This is not recommended, as it poses security risks.

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Change default user password

For security reasons, we don't want to use the default password for the default Kubeflow user when installing in security-sensitive environments. Instead, you should define your own password before deploying. To define a password for the default user:

1. Pick a password for the default user, with email user@example.com, and hash it using bcrypt:

   python3 -c 'from passlib.hash import bcrypt; import getpass; print(bcrypt.using(rounds=12, ident="2y").hash(getpass.getpass()))'

2. Edit common/dex/base/config-map.yaml and fill the relevant field with the hash of the password you chose:

   ...
     staticPasswords:
     - email: user@example.com
       hash: <enter the generated hash here>

Release process

The Manifest Working Group releases Kubeflow based on the release timeline. The community and the release team work closely with the Manifest Working Group to define the specific dates at the start of the release cycle and follow the release versioning policy, as defined in the Kubeflow release handbook.

Frequently Asked Questions

• Q: What versions of Istio, Knative, Cert-Manager, Argo, ... are compatible with Kubeflow?
  A: Please refer to each individual component's documentation for a dependency compatibility range. For Istio, Knative, Dex, Cert-Manager and OIDC-AuthService, the versions in common are the ones we have validated.
• Q: Can I use earlier version of Kustomize with Kubeflow manifests? A: The manual installation instructions work with Kustomize 3.2. To use the one-liner installation you'll need to comment out the sortOptions section in the example/kustomization.yaml.