If you’re a Docker/Compose user new to Kubernetes, you might have noticed that you can’t use environment variables in your manifest files. This might not be a huge deal to most, especially since there are other (better) ways of managing environment variables in Kubernetes, but to someone getting started it can be a pain.
Continue reading “How to use environment variables in a Kubernetes manifest”
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In a previous post, I showed how to build your own Kubernetes clusters using K3s. Since then, I’ve found an even easier cluster deployment tool that runs entirely within Docker. That’s right – if you have a computer with Docker installed, you can run a full multi-node Kubernetes cluster with no additional setup. This post shows you how to do it, and provides an all-in-one script for spinning up a full cluster with a demo website in one command.
Continue reading “Deploy a Kubernetes cluster with Kubernetes in Docker (Kind)”
No joke, Kubernetes is a pain in the butt to set up yourself. Managed services like GKE and EKS are great if you have extra cash, but if you just want a basic cluster to mess around in (or you’re cheap like me), eventually you’ll start looking for a way to do it yourself.
After a lot of futzing around, I finally got a virtualized 3-node Kubernetes lab running on my home server. It’s not redundant, secure, or fail-safe, but I can run K8s applications on it without problem. And you can’t beat the cost. This blog will show you how to set up your own fully functioning, free Kubernetes cluster.
Continue reading “Bootstrap a Kubernetes cluster with KVM and K3s”
Installing programs is something most people take for granted. How could it be easier – you simply download an installation file, run it, answer a few prompts, and before you know it you have a fresh new application ready to go. This is fine for a single-user system like a laptop or desktop, but what happens when you want to share that program with someone else, or migrate it – along with its configuration and settings – to a different computer? What if you wanted to do a clean reinstall without having to hunt for scattered or leftover files? Better yet, what if you could run the application in a completely self-contained environment without it affecting your main system? Docker provides a unique way of accomplishing this, and the technology behind it is quickly gaining traction. Continue reading “Contain Your Excitement: Building Portable Apps with Docker”