In most Kubernetes installations, a well-maintained etcd is one of the key conditions for having a peaceful administrator life. Most Kubernetes distributions imply limitations on etcd and its size. For Openshift there’s a quota limit of 8GB. Typically that limitation should not hit you unless you run really large clusters and or utilize the cluster […]
Photo by Daniel van den Berg on Unsplash On a warm summer day, I visited the Kubernetes Community Days Munich and enjoyed Adrian Reber’s talk about “Forensic container checkpointing and analysis”. Now I want to try that with OpenShift 4.13! This blog post will mainly cover how to enable and use checkpointing on OpenShift 4.13. […]
This article shows how MuleSoft’s Runtime Fabric (RTF) deployed to Red Hat OpenShift delivers a modern containerized API solution.
Introduction As a Solution Architect for Red Hat’s ecosystem, I talk to many independent software vendors (ISVs) about modernizing their applications to enable hybrid cloud and edge strategies. Linux, containers, Kubernetes and micro-services architecture are a default choice nowadays in many new application development projects. But sometimes you can not get rid of some dependencies […]
Introduction Since my last exploration of the topic in mid-2021, there have been significant advancements in cold disaster recovery for applications on Kubernetes. Since then, there have been remarkable improvements in both the technical aspects and the user experience of cold disaster recovery. Notably, the Kubernetes operator that manages the technical infrastructure for cold disaster […]
By Robert Baumgartner, Red Hat Austria, February 2023 (OpenShift 4.12) In this blog I will guide you on how to use service performance monitoring (SPM) with Jaeger. It should work with any application that is working with OpenTelemetry. This document is based on OpenShift 4.12. See Distributed tracing release notes. OpenShift distributed tracing platform Operator […]
By Robert Baumgartner, Red Hat Austria, March 2023 Summary Recently Red Hat has released a tool at the Customer Portal Labs that can give very detailed information about Operators and available updates, supported versions, and much more. The name of this tool is Red Hat OpenShift Container Platform Operator Update Information Checker Where to find […]
Node Base Images are OCI container images that are used to deliver software updates and customizations to rpm-ostree based Linux systems running on bare metal and virtual machines, such as Fedora CoreOS, Fedora IoT, Fedora Silverblue, CentOS Stream CoreOS, RHEL CoreOS, and RHEL for Edge. Node Base Images are built with OSTree Native Containers. While application […]
From Java code in your repo to a running Pod on Kubernetes. This article explains all the steps needed, including basic shortcuts.
Read this manual if you want to setup and demonstrate (or otherwise use) all the mechanisms of Quarkus GrumpyCat. First of all GrumpyCat is a micro services based multi player game, which you can use to demonstrate and play a nice PacMan / FatCat like game. But with this demo you can also easily demonstrate the benefits of using the GitOps principles for developing and deploying a bigger application.