k3s Has a Free Lightweight Kubernetes — Production-Ready Cluster in 30 Seconds

Full Kubernetes needs 4GB+ RAM per node, complex etcd setup, and a PhD in YAML. For most developers, it's overkill. k3s is Kubernetes stripped to essentials. Single binary, 512MB RAM, installs in 30 seconds. Certified Kubernetes — every K8s tool, Helm chart, and operator works unchanged. What You Get Free Apache 2.0 licensed: Single binary — 70MB, includes everything 512MB RAM — runs on Raspberry Pi 30-second install — one curl command Certified Kubernetes — passes CNCF conformance SQLite default — no etcd needed (PostgreSQL/MySQL optional) Built-in — Traefik ingress, CoreDNS, Flannel CNI, local-path storage Multi-arch — AMD64, ARM64, ARMv7 Auto-upgrades — system-upgrade-controller for rolling updates HA mode — multi-server for high availability Quick Start # Server (master) curl -sfL https://get.k3s.io | sh - # That's it. Check: kubectl get nodes Add a worker: # On worker node (get token from server: cat /var/lib/rancher/k3s/server/node-token) curl -sfL https://get.k3s.io | K3S_URL =