Technical Requirements for Kubernetes

The Kubernetes cluster on which you are deploying OpenWhisk must meet the following requirements:

  • Kubernetes version 1.19+. Our automated testing currently covers Kubernetes versions 1.19, 1.20, and 1.21.
  • The ability to create Ingresses to make a Kubernetes service available outside of the cluster so you can actually use OpenWhisk.
  • Unless you disable persistence (see, either your cluster must be configured to support Dynamic Volume Provision and you must have a DefaultStorageClass admission controller enabled or you must manually create any necessary PersistentVolumes when deploying the Helm chart.
  • Endpoints of Kubernetes services must be able to loopback to themselves (the kubelet's hairpin-mode must not be none).