In part 1, I’ve given an introduction to my path to learn more about Kubernetes with a hands-on approach. The story ended with Minikube being installed and a first sample application (the ‘http echosever’) up and running in a container that is managed by Kubernetes. With all of this in place now, the next logical … Continue reading Kubernetes Intro – Part 2 – The Dashboard
When we are talking about the 5G Core and implementations based on containers the story does not end with Docker containers. As a 5GC is not only based on one server and needs lots of redundancy, a management (orchestration) tool is required to manage containers across a large number of servers. There are several tools … Continue reading Kubernetes Intro – Part 1
When I recently read this article about vulnerabilities to break out of virtual machines, I became aware again of the concept to run virtual machines inside virtual machines. This is also called nested virtualization and it seems most modern Intel and AMD CPUs support this feature. But does it really work ‘just like that and … Continue reading Nested Virtualization
A lot of today’s services that run on servers do so in containers, either in small setups that use Docker, for example, or in Kubernetes clusters for larger deployments. By design, containers encapsulate an application, so threads in a container can’t modify anything on the host computer that is not specifically attached to the container. … Continue reading Container Vulnerabilities
It’s the time of the year again to have a look back at the things that moved me this year. On the surface, it seems that I had relatively few posts about wireless network technologies. But this appearance is quite deceptive.
From today’s perspective, one of the most important courses during my computer science education in college was the one that taught me about how operating systems work. And while many things that I learned at college are no longer relevant, the material of that course is still as relevant today as it was then. Sure, … Continue reading Book Review: Linux Kernel Programming – Kaiwan N Billimoria
Earlier this year, I discovered how to run a graphical desktop in a virtual machine in the cloud. I promptly put this to good use and ran a couple of online hands-on workshops on various topics in recent months. In combination with Guacamole, participants don’t even need to install a remote desktop viewer, but can … Continue reading Several Desktops On A Single VM In The Cloud
Earlier this year, I started experimenting with how to make online talks and learning sessions online more interactive. Yes, after a year of conferences being online-only, I grew a bit tired of staring into a tiny camera lens and only getting little feedback. So I came up with cloud based virtual desktops for interactive online … Continue reading Online Workshops with Virtual Desktops in the Browser
After exploring many new technical topics over the past few months, including Docker and Kubernetes, I ventured out over the weekend to have a look at OpenStack. I wanted to have a closer look because OpenStack is used to provide a private cloud infrastructure, i.e. virtual machines (compute), storage, and networking for many projects. OpenStack … Continue reading Playing with OpenStack – A Rather Unpleasant Experience
Over the past months, I’ve been experimenting a lot with Docker and Kubernetes and decided to pass on the knowledge I have gained in occasional cloud-based hands-on workshops rather than doing presentations or videos. The advantage: Instead of talking ‘against a wall’ with virtually no feedback whatsoever during and after a presentation, hands-on workshops are … Continue reading A Firewall for Online Workshops