Red Hat Container Development Kit (CDK) With Nested KVM

Why

If you are like me, you probably prefer to install new and exploratory software in a fresh virtual machine (VM) or container to insulate your laptop/desktop from software pollution (TM). Red Hat Container Development Kit (CDK) relies on virtualization to create a Red Hat Enterprise Linux (RHEL) virtual machine to run OpenShift (based on Kubernetes). Red Hat specifically supports installation of the CDK on Windows, macOS, and RHEL Server, but if you are running Fedora, RHEL Workstation, or even CentOS, you will run into trouble. If you are not running a supported desktop, you can always use a RHEL Server virtual machine, and this tutorial is for you.

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Extend Red Hat JBoss BPM Suite through the Service Repository

Introduction

Red Hat JBoss BPM Suite offers a really flexible BPMN engine that can be extended with Custom Reusable Services. Most users know them as Work Item Handler (the technical implementation name), but few of them know that it’s possible to expose them in a comfortable list of reusable services. In fact, you can create a repository of services and simplify the life of the BPMN designer that can easily pick and choose the right service.

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Develop and Deploy on OpenShift Online Starter using Red Hat JBoss Developer Studio

The OpenShift Online Starter platform is available for free: visit https://manage.openshift.com/. It is based on Red Hat OpenShift Container Platform 3.7. This offering allows you to play with OpenShift Container Platform and deploy artifacts. The purpose of the article is to describe how to use Red Hat JBoss Developer Studio or JBoss Tools together with this online platform.

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Introducing stapbpf – SystemTap’s new BPF backend

SystemTap 3.2 includes an early prototype of SystemTap’s new BPF backend (stapbpf). It represents a first step towards leveraging powerful new tracing and performance analysis capabilities recently added to the Linux kernel. In this post, I will compare the translation process of stapbpf with the default backend (stap) and compare some differences in functionality between these two backends.

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Inter-Reactive Kotlin Applications

Kotlin coroutines is one of the major features of Eclipse Vert.x 3.5.

Most of us are used to writing interactive code and going the reactive way is not a trivial paradigm shift for everyone: programming using asynchronous APIs can be more challenging than using a direct synchronous style, in particular, if you have several operations that you want to do in sequence. Also, error propagation is often more complex when using asynchronous APIs.

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How to customize OpenShift RBAC permissions

Recently I’ve received a question from a customer who would like to restrict user permission in OpenShift Container Platform in order to be compliant with his company’s security policies.

OpenShift has rich and fine-grained RBAC capabilities out of the box, which gives you the possibility to setup exactly who can do actions (verbs in OpenShift word) on every kind of resource.

Before we begin to dive deep into this topic, I have provided links to some resources I think will be of use to help better understand the concepts of roles, roles scope, RoleBinding, groups, etc.

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