第1章 Getting started with functions


Function lifecycle management includes creating and deploying a function, after which it can be invoked. You can do all of these operations on OpenShift Serverless using the kn func tool.

1.1. Prerequisites

To enable the use of OpenShift Serverless Functions on your cluster, you must complete the following steps:

  • The OpenShift Serverless Operator and Knative Serving are installed on your cluster.

    注記

    Functions are deployed as a Knative service. If you want to use event-driven architecture with your functions, you must also install Knative Eventing.

  • You have the oc CLI installed.
  • You have the Knative (kn) CLI installed. Installing the Knative CLI enables the use of kn func commands which you can use to create and manage functions.
  • You have installed Docker Container Engine or Podman version 3.4.7 or higher.
  • You have access to an available image registry, such as the OpenShift Container Registry.
  • If you are using Quay.io as the image registry, you must ensure that either the repository is not private, or that you have followed the OpenShift Container Platform documentation on Allowing pods to reference images from other secured registries.
  • If you are using the OpenShift Container Registry, a cluster administrator must expose the registry.
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