What you always wanted to know about your etcd usage

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 […]

Compliance is NOT Security

The Problem with Security and Compliance Mixture When talking to customers or colleagues, I often see two distinct topics being conflated: Compliance and (IT-) Security. Some customers have requirements they say MUST be fulfilled. When asked what their goal with this requirement is, they cannot elaborate the intention. They often fall back into saying that […]

Forensic container checkpointing in OpenShift

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. […]

Automatically update containers with podman-auto-update

Photo by Timelab on Unsplash In this tutorial I will show you how to configure automatic updates for containers in rootless Podman environments and how systemd manages these containers as services. The tutorial is divided into the following sections: If you are not interested in the possible use cases and would rather start right away, […]