Transforming a blogging platform into a real community initiative

Our blogging platform “Open Sourcerers” has grown to over 40 authors, all of whom share the same passion for open source technology. We believe that a community-based approach is essential, and everyone should have the opportunity to contribute to our platform. Until now, our focus has been solely on the content itself, but we have […]

Using OSTree Native Containers as Node Base Images

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 […]

Java to Pod

From Java code in your repo to a running Pod on Kubernetes. This article explains all the steps needed, including basic shortcuts.

Kubernetes: How a Rejected Internal Project Became a Global Standard

San Francisco, June 9-10, 2014. In the halls of the Marriott Marquis hotel, the first DockerCon is held. “Containers everywhere!” is printed on the back of event T-shirts. The first big news of DockerCon is the launch of Docker 1.0, but there is much more to come. It is the beginning of what is later […]

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 […]

OpenShift Local or Single Node OpenShift

Are you a developer or just a curious individual who wants to dip their toes in the Cloud, but are not sure whether to go for OpenShift Local or Single Node OpenShift? You’ve come to the right place. In this article, I will explore the differences and similarities between these two variants of OpenShift, so […]

Automated Application Packaging And Distribution with OpenShift – Helm Charts and Operators – Part 2/4

Part two of the article series. This time about Helm Charts, Operators and various CLI tools to work with container images.

How to go from Docker to Kubernetes the right way

Docker came a long way. It established itself very fast as the de-facto standard to get going with your container journey. It did not matter if you wanted to just play around with containers or if you wanted to build up new microservices, Docker was and still is a great choice to get yourself started. […]

Container images, multi-architecture, manifests, ids, digests – what’s behind?

Many of us use container images from day to day, maybe also in many various architectures. For example on your Raspberry PI (aarch64), do you really know how it works in detail? I have worked with container images more or less since 2015 but during an OpenShift 4 air-gapped installation and mirroring of images into […]

OPENSHIFT NETWORKING FROM A CONTAINER/WORKLOAD POINT OF VIEW – PART 6: CONTROLLING EGRESS TRAFFIC

OpenShift 3.3 and later contain the functionality to route pod traffic to the external world via a well-defined IP address. This is useful for example if your external services are protected using a firewall and you do not want to open the firewall to all cluster nodes. The way it works is that a egress […]

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