Openshift

Every enterprise has one: a Java EE application that has quietly earned its keep for a decade. It builds into an EAR, it wants an application server you download as a ZIP, it authenticates with a form and a j_security_check, and it imports everything from javax.*. It works. Nobody wants to touch it. And it is exactly the kind of thing that becomes impossible to deploy the day someone asks for “just put it in a container on OpenShift.” ...

Autoscaling is easy to explain and hard to see. The docs tell you a HorizontalPodAutoscaler watches CPU and adds pods — but to watch it happen you need a workload that burns CPU on demand, a deployment that reports its resource usage honestly, and a way to generate real traffic. This post wires all three together with a tiny Quarkus app, the quarkus-openshift extension, and k6. The full source is here: ozimakov-rh/quarkus-hello-world. It targets Quarkus 2.14 on Java 17. ...