Disclaimer: In most cases, we don’t recommend editing files in a container. However, in rare cases, you might need to reproduce and slightly modify a file in a production container, especially when debugging. (In this case, the vim method I’m using works on Fedora 32 on my laptop and it is the base of my Red Hat OpenShift container image.)
Continue reading Use vim in a production Red Hat OpenShift container in 6 easy steps
Operators are one of the ways to package, deploy, and manage application distribution on Red Hat OpenShift. After a developer creates an Operator, the next step is to get the Operator published on OperatorHub.io. Doing this allows users to install and deploy the Operator in their OpenShift clusters. The Operator is installed, updated, and the management lifecycle is handled by the Operator Lifecycle Manager (OLM).
In this article, we explore the steps required to test OLM integration for the Operator. For demonstration, we use a simple Operator that prints a test message to the shell. The Operator is packaged in the recently introduced Bundle Format.
Continue reading “Operator integration testing for Operator Lifecycle Manager”
In my previous article about nsswitch.conf I talked about how simple, perhaps too simple, this config file is to use. What I didn’t cover then was how simplistic its internal implementation is. Specifically, an application only loads this file once—the first time it’s needed.
Continue reading Coming in glibc 2.33: Reloadable nsswitch.conf
Combining Quarkus with Red Hat OpenShift provides an ideal environment for creating scalable, fast, and lightweight applications. Quarkus significantly increases developer productivity with tooling, pre-built integrations, application services, and more. This article presents 10 reasons why you should develop your Quarkus applications on OpenShift.
Continue reading 10 reasons to develop Quarkus applications on Red Hat OpenShift
Drools is a popular open source project known for its powerful rules engine. Few users realize that it can also be a gateway to the amazing possibilities of artificial intelligence. This two-part article introduces you to using Red Hat Decision Manager and its Drools-based rules engine to combine machine learning predictions with deterministic reasoning. In Part 1, we’ll prepare our machine learning logic. In Part 2, you’ll learn how to use the machine learning model from a knowledge service.
Continue reading Knowledge meets machine learning for smarter decisions, Part 1
Tekton is a powerful, Kubernetes-native framework for creating continuous integration and delivery (CI/CD) systems. In this article, we’ll use real-world examples to show you how to install Tekton, create Tasks, and eventually create our own pipeline.
Continue reading Getting started with Tekton and Pipelines
This article shows you how to install Red Hat JBoss Enterprise Application Platform (JBoss EAP) XP 2.0.0 GA with support for Eclipse MicroProfile. Once you’ve enabled Eclipse MicroProfile, you will be able to use its quickstart examples to start developing your own MicroProfile applications with Red Hat CodeReady Studio. In this demonstration, you’ll learn two ways to build and run the MicroProfile Config quickstart application.
Continue reading Develop Eclipse MicroProfile applications on Red Hat JBoss Enterprise Application Platform XP 2.0
If you’re looking to build Open Container Initiative (OCI) container images without a full container runtime or daemon installed, Buildah is the perfect solution. Now, Buildah is an open source, Linux-based tool that can build Docker- and Kubernetes-compatible images, and is easy to incorporate into scripts and build pipelines. In addition, Buildah has overlap functionality with Podman, Skopeo, and CRI-O.
Continue reading Getting started with Buildah
For a long time at Red Hat, all executables in RPMs were built with debuginfo enabled. While this practice makes it easier for people in support to investigate issues reported using tools such as GDB and crash, there are other important non-debugging uses for the resulting debuginfo.
Continue reading Debuginfo is not just for debugging programs