Chapter 2. Before You Begin
2.1. Comparison: Fuse and Fuse Integration Services
There are several major functionality differences:
- Fuse Management Console is not included as Fuse administration views have been integrated directly within the OpenShift Web Console.
- An application deployment with Fuse Integration Services consists of an application and all required runtime components packaged inside a Docker image. Applications are not deployed to a runtime as with Fuse, the application image itself is a complete runtime environment deployed and managed through OpenShift.
- Patching in an OpenShift environment is different from standalone Fuse since each application image is a complete runtime environment. To apply a patch, the application image is rebuilt and redeployed within OpenShift. Core OpenShift management capabilities allow for rolling upgrades and side-by-side deployment to maintain availability of your application during upgrade.
- Provisioning and clustering capabilities provided by Fabric in Fuse have been replaced with equivalent functionality in Kubernetes and OpenShift. There is no need to create or configure individual child containers as OpenShift automatically does this for you as part of deploying and scaling your application.
- Messaging services are created and managed using the A-MQ xPaaS images for OpenShift and not included directly within Fuse. Fuse Integration Services provides an enhanced version of the camel-amq component to allow for seamless connectivity to messaging services in OpenShift through Kubernetes.
- Live updates to running Karaf instances using the Karaf shell is strongly discouraged as updates will not be preserved if an application container is restarted or scaled up. This is a fundamental tenet of immutable architecture and essential to achieving scalability and flexibility within OpenShift.
Additional details on technical differences and support scope are documented in an associated KCS article.
2.2. Version Compatibility and Support
See the xPaaS part of the OpenShift and Atomic Platform Tested Integrations page for details about OpenShift image version compatibility.
2.3. Initial Setup
The instructions in this guide follow on from and assume an OpenShift instance similar to that created in the OpenShift Primer.