Kubernetes networking has historically been split across two layers: the Container Network Interface (CNI), which handles pod-to-pod connectivity and network policy, and the service mesh, which adds application-layer features like mutual TLS, traffic routing, and observability. For years the common architecture looked like this: The rise of eBPF-based networking has started to collapse these layers….
Executive Summary If you’re spinning up infrastructure with an API but then managing it with a CLI, you’re not really doing Infrastructure as Code. You’re just making old-school IT move a bit faster. For years, people treated data centers like big rooms full of hardware. You are accelerating legacy IT without eliminating its entropy. The…
The “Stockout” Error on a Healthy Subnet It’s 2 PM on a random Tuesday, and suddenly the Cluster Autoscaler throws a warning: Unschedulable—No free IPs in subnet. You open up the VPC. The subnet’s a /20, so that’s 4,096 IPs. You only have 15 nodes. Quick math: 15 nodes, maybe 30 pods each, tops. That’s…
I’ve spent 25 years watching infrastructure fail, and here’s what I’ve learned: most outages don’t kick off with a dramatic meltdown. They creep in quietly. A bit of scheduler pressure, some memory reclaim, and no one’s dashboard even notices. Your CPU looks fine at 40%. There’s a 30% buffer left on memory. Still, the helpdesk…
“Write once, run anywhere.” It’s the oldest lie in distributed computing. Java promised it in the 90s. Docker promised it in the 2010s. Now, cloud vendors promise it—usually right before they lock you into a proprietary service mesh or a database that only exists in us-east-1. Let’s be real for a minute: Infrastructure is not…
The “Shim Tax” is Killing Your ROI If you are running standard Kubernetes clusters on top of VMware or cloud VMs, you are paying a hidden tax on every single pod you launch. It’s called the Shim Tax — and in high-density environments, it’s quietly consuming 2GB to 4GB of RAM per node just to keep the…
