Get up and running quickly with Rancher’s Kubernetes-focused OS

k3OS: a Linux Distribution for Kubernetes

k3OS is a stripped-down, streamlined, easy-to-maintain operating system for running Kubernetes nodes. It is actively developed and maintained by Rancher Labs (now part of SUSE) and, as its name implies, it runs the K3s Kubernetes distribution (also Rancher-owned).

K3s is an official CNCF sandbox project that delivers a lightweight yet…

How to generate unique IDs in a distributed environment at scale

Generating unique identifiers is a task all programmers have had to deal with at some point in the course of an application’s development lifecycle. Unique IDs allow us to properly identify data objects, persist them, retrieve them, and have them participate in complex relational patterns.

But how are these unique…

How to use Docker Content Trust for your containers

With Docker dominating the delivery workflow, it’s become imperative that your container images can be trusted. How can your users be sure that the image content they’re downloading is what you’ve created? How can you verifiably prove that you are, indeed, the creator of an image?

In this article, we’ll…

These are the stories you loved reading in Mac O’Clock

March has been a challenging month for all of us, no matter where on this wonderful planet we live. The outbreak of COVID-19 changed our daily routine and found many of us bound at home. To quote the late Maya Angelou, “we may encounter many defeats but we must not…

How to introduce automatic security scans in your Java builds

While most of us take active measure when developing our projects to be protected against known security vulnerabilities, there is a series of passive actions and checks that are often overlooked.

The Open Web Application Security Project (OWASP) is a nonprofit foundation that works to improve the security of software…

“Hey Siri, do I have coronavirus?”

Apple’s Siri received an update to be able to provide guidance on Coronavirus, also known as COVID-19. You can now ask Siri:

“Hey Siri, do I have coronavirus?”

Siri will listen and guide you through a triage process as per U.S. Public Health Service’s guidelines.

Let’s see how that works.

Having symptoms workflow

Everyday monitoring and browsing utilities to avoid mistakes

It’s no secret that Kubernetes dominates the container-orchestration market. A recent study by StackRox confirmed adoption of Kubernetes is at an all-time high of 86% over other competitive solutions. Kubernetes is here to stay, so let’s prepare our development/admin environment for maximum flexibility and efficiency when working with Kubernetes.


Asymmetric cryptography concepts you should learn as an engineer

If you’re into software development, you have probably already been introduced to cryptography in one way or another. Signing messages, encrypting payloads, verifying signatures, and using certificates; these are all features we use every day even when we’re not aware of it.

Public-key cryptography, or asymmetric cryptography, is a topic…

These are the stories you loved reading in Mac O’Clock

Another month and Mac O’Clock continues to be the most active Apple-related publication on Medium. Many, many thanks to our authors and extra thanks to you, our loyal daily readers. We continue strong, publishing the best stories for Apple owners and enthusiasts.

Do you have an interesting story to share…

How to monitor the health of your containers using free, open-source tools

Whether you have a handful of containers running in your development machine or hundreds of containers running in production, knowing what happens behind the scenes can be invaluable. Do you see excessive disk activity and you don’t know which container is causing it? …

Nassos Michas

Software engineer | Cert. Scrum master | Cert. Professional for Requirements Engineering | CTO at European Dynamics

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