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Chapter 1. Red Hat JBoss Web Server Operator
An Operator is a Kubernetes-native application that makes it easy to manage complex stateful applications in Kubernetes and OpenShift environments. Red Hat JBoss Web Server (JWS) provides an Operator to manage JWS for OpenShift images. You can use the JWS Operator to create, configure, manage, and seamlessly upgrade instances of web server applications in OpenShift.
Operators include the following key concepts:
The Operator Framework is a toolkit to manage Operators in an effective, automated, and scalable way. The Operator Framework consists of three main components:
- You can use OperatorHub to discover Operators that you want to install.
- You can use the Operator Lifecycle Manager (OLM) to install and manage Operators in your OpenShift cluster.
- You can use the Operator SDK if you want to develop your own custom Operators.
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An Operator group is an OLM resource that provides multitenant configuration to OLM-installed Operators. An Operator group selects target namespaces in which to generate role-based access control (RBAC) for all Operators that are deployed in the same namespace as the
OperatorGroupobject. - Custom resource definitions (CRDs) are a Kubernetes extension mechanism that Operators use. CRDs allow the custom objects that an Operator manages to behave like native Kubernetes objects. The JWS Operator provides a set of CRD parameters that you can specify in custom resource files for web server applications that you want to deploy.
This document describes how to install the JWS Operator, deploy an existing JWS image, and delete Operators from a cluster. This document also provides details of the CRD parameters that the JWS Operator provides.
Before you follow the instructions in this guide, you must ensure that an OpenShift cluster is already installed and configured as a prerequisite. For more information about installing and configuring OpenShift clusters, see the OpenShift Container Platform Installing guide.
For a faster but less detailed guide to deploying a prepared image or building an image from an existing image stream, see the JWS Operator QuickStart guide.
Red Hat supports images for JWS 5.4 or later versions only.
Additional resources
