Uncategorized Archives - Red Hat Developer

New and improved Topology view for OpenShift 4.3

By Steve Speicher and Veethika Mishra January 16, 2020June 29, 2020

The Topology view in the Red Hat OpenShift console’s Developer perspective is a thoughtfully designed interface that provides a visual representation of an application’s structure. This view helps developers clearly identify one resource type from another, as well as understand the overall communication dynamics within the application. Launched with the 4.2 release of OpenShift, the Topology view has already earned a spotlight in the cloud-native application development arena. The constant feedback cycles and regular follow-ups on the ongoing trends in the developer community have helped to shape up a great experience in the upcoming release. This article focuses on a few showstopper features in the Topology view that were added for OpenShift 4.3.

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JMS 2.0 on Kubernetes with Apache ActiveMQ

By Editorial Team December 20, 2019July 1, 2020

DevNation Live tech talks are hosted by the Red Hat technologists who create our products. These sessions include real solutions and code and sample projects to help you get started. In this talk, you’ll learn about Apache ActiveMQ from Justin Ross, Engineering Manager at Red Hat.

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4 command-line tools for Kubernetes: Linux edition

By Don Schenck August 8, 2019August 7, 2019

In a previous blog post, I detailed how to install four very useful Kubernetes tools on your macOS or Windows machine. Those tools—kubectl, stern, kubectx, and kubens—are must-haves for the advancing developer, as well as any folks in operations. What I failed to do previously, however, was include instructions for installing these tools on Linux. So… here we are.

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What is your biggest work environment distraction?

By Rikki Endsley April 15, 2019April 12, 2019

The 2019 Stack Overflow Developer Survey results show that more than 40% of respondents say a distracting work environment is the biggest challenge to productivity. What distracts you most in your work environment?

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Extend Red Hat JBoss BPM Suite through the Service Repository

By Donato Marrazzo January 30, 2018January 29, 2018

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

By Jeff Maury January 2, 2018March 19, 2020

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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Securing AMQ7 Brokers with SSL (part 2)

By Mary Cochran December 28, 2017December 27, 2017

Previously I did a post on Securing AMQ7 Routers with SSL. This post will expand upon that and explain how to secure JBoss AMQ7 Brokers with SSL and how to connect the routers and brokers with SSL as well.

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Introducing stapbpf – SystemTap’s new BPF backend

By Aaron Merey December 13, 2017December 12, 2017

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

By Julien Viet December 7, 2017December 7, 2017

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

By Michele Naldini December 4, 2017December 1, 2017

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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