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Installation

Before you begin

Make sure the following conditions are met:

  • A Kubernetes cluster with version 1.26 or newer is running. Learn how to install the Kubernetes tools. For any clusters with version lower than 1.27, we need to enable the feature gate for Start Ordinal, see https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#start-ordinal
  • Your cluster has at least 1 node with 1+ CPUs and 1G of memory available for the LeaderWorkerSet controller manager Deployment to run on. NOTE: On some cloud providers, the default node machine type will not have sufficient resources to run the LeaderWorkerSet controller manager and all the required kube-system pods, so you'll need to use a larger machine type for your nodes.
  • The kubectl command-line tool has communication with your cluster.

Install a released version

To install a released version of LeaderWorkerSet in your cluster, run the following command:

VERSION=v0.3.0
kubectl apply --server-side -f https://github.com/kubernetes-sigs/lws/releases/download/$VERSION/manifests.yaml

Uninstall

To uninstall a released version of LeaderWorkerSet from your cluster, run the following command:

VERSION=v0.3.0
kubectl delete -f https://github.com/kubernetes-sigs/lws/releases/download/$VERSION/manifests.yaml

Install the latest development version

To install the latest development version of LeaderWorkerSet in your cluster, run the following command:

kubectl apply --server-side -k github.com/kubernetes-sigs/lws/config/default?ref=main

The controller runs in the lws-system namespace.

Uninstall

To uninstall LeaderWorkerSet, run the following command:

kubectl delete -k github.com/kubernetes-sigs/lws/config/default

Build and install from source

To build LeaderWorkerSet from source and install LeaderWorkerSet in your cluster, run the following commands:

git clone https://github.com/kubernetes-sigs/lws.git
cd lws
IMAGE_REGISTRY=<registry>/<project> make image-push deploy

Uninstall

To uninstall LeaderWorkerSet, run the following command:

make undeploy

Optional: Use cert manager instead of internal cert

The webhooks use an internal certificate by default. However, if you wish to use cert-manager (which supports cert rotation), instead of internal cert, you can by performing the following steps.

First, install cert-manager on your cluster by running the following command:

VERSION=v1.11.0
kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/$VERSION/cert-manager.yaml

Next, in the file lws/config/default/kustomization.yaml replace ../internalcert with ../certmanager then uncomment all the lines beginning with [CERTMANAGER].

Finally, install the cert manager follwing the link: https://cert-manager.io/docs/installation/#default-static-install and apply these configurations to your cluster with kubectl apply --server-side -k config/default.