Approaching the Kubernetes Bridge – Multi-container Apps with Rootless Podman

In the year 2023 we celebrate the 10th anniversary of Docker and the 9th anniversary of Kubernetes. Container technology has now become mainstream. But recent advances in the Podman ecosystem prove that innovation in the container world is still happening at a strong pace. Podman 4 was released in February 2022 and brought considerable improvements […]

A little bit of security is what I want

A quick tour of how a Kubernetes Management Platform like Red Hat OpenShift can help to ease developers day to day work and ensure security at the same time

Configuring custom domains for applications – the operator-way!

On a rainy Thursday evening, I was looking at a lemon tree and the lengthy URL of an application that I deployed some time ago on my OpenShift cluster. And I was wondering how I can make it shorter and human readable. Creating an edge route with a custom certificate is rather simple [1]. However, […]

Securing the integrity of Software Supply Chains

Overview How can we secure the integrity of our Software Supply Chains and have confidence that our software has not been tampered with and can be traced to its source? Which are the main parts of the software supply chain security? Before explaining how to secure the Software Supply Chain, we need first to understand […]

eBPF: More than package filtering… much more.

Let’s face it, eBPF is the hot topic of the day in the Linux and Kubernetes world: at KubeCon EU in Valencia it was hard to find a project not talking about it, and KubeCon US in October will probably be even more intense. And on September 28 and 29 there will be the virtual […]

Develop faster, operate smart: A Kubernetes-native guide to AI application development

tl;dr A Kubernetes-native software engineering approach for the development of AI applications helps you increase developer productivity, optimize resource consumption as well as simplify operations. A hands-on demo of this approach can be seen here. Two-step development approach The usage of an AI/ML model in an application requires basically a two-step development approach. The first […]

Escaping the Moving Target Platform Dilemma

tl;dr To ensure application consistency for distributed (multi hybrid) cloud environments, streamline your target platform from the bottom up. This helps you dealing with the Moving Target Platform Dilemma (MTPD). As mentioned in the previous article, using the SaaS Kubernetes (K8s) offerings from cloud providers (such as EKS, AKS, GKS) causes your application services to […]

The Moving Target Platform Dilemma

tl;dr You want to gain flexibility by leveraging the K8s offerings from multiple hyperscalers (“cloud providers”) for your application. You gain a bunch of inflexibility by assuring your application behaves equally on all these K8s target platforms. I remember the days as a Java developer when we had to ensure our applications (quite often pre-Spring […]

Kubernetes Native Development

Abstract of our book about how to develop, build, deploy, and run applications on Kubernetes In March 2021, we both embarked on a thrilling journey by writing a book on “Kubernetes Native Development – Develop, Build, Deploy, and Run Applications on Kubernetes”. The book covers a topic that is especially relevant for everyone that decided […]

The importance of getting resource requests and limits right.

Problem Summary At the start of spring 2022, I was asked to assist in untangling a very escalated set of related cases with one of our customers. Their cluster had been experiencing stability issues over a period of several months. Initial analyses by support seemed to suggest resource problems, in particular insufficient memory. There were […]

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