K3s homelab migration guide
- Hemant Kumar published a January 27, 2025 guide showing how to move a Docker Compose homelab onto K3s, the lightweight Kubernetes distribution. - The walkthrough converts Compose files with Kompose, then rebuilds storage, networking, and monitoring around K3s defaults like Traefik ingress and local-path volumes. - K3s ships with Traefik and local storage, so small homelabs gain realism but add operational overhead. (docs.k3s.io)
Docker Compose runs containers on one machine; K3s spreads them across several. Hemant Kumar’s January 27, 2025 guide walks homelab users through that jump. (terminalbytes.com) K3s is a lightweight Kubernetes distribution built for smaller systems, and Kumar frames it as a way to keep Kubernetes features without a full enterprise stack. He lists a 512MB memory floor, one CPU core, and a single-binary install. (terminalbytes.com) The migration starts with a backup of the existing Compose setup, then a conversion step using Kompose or hand-written manifests. Kumar recommends manual conversion for people who want to learn how Deployments, Services, ConfigMaps, and PersistentVolumeClaims fit together. (terminalbytes.com) That shift changes the basic model. In Docker Compose, containers usually stay on one host with one filesystem; in Kubernetes, pods can move between nodes, so storage and networking have to be declared separately. (terminalbytes.com) (docs.k3s.io) K3s ships with several pieces already installed, including CoreDNS, Traefik, metrics-server, and the local-path storage provisioner. That means a new homelab cluster can expose apps through Traefik without adding a separate ingress controller on day one. (docs.k3s.io 1) (docs.k3s.io 2) Storage is where many small clusters get tricky. K3s uses local-path by default, which ties a volume to the node that created it, so multi-node setups often add Network File System, or NFS, to share data across machines. (docs.k3s.io) (phillipsj.net) Both Jamie Phillips and Mark Sharpley advise testing the NFS mount on the K3s node before deploying a provisioner. Their examples install NFS client tools, mount the share manually, and only then create an NFS-backed StorageClass. (phillipsj.net) (marksharpley.co.uk) TLS, the layer that encrypts web traffic, usually lands at the cluster edge. K3s documentation says Traefik is the default ingress controller, and current K3s releases from v1.32 onward install Traefik v3 unless it is disabled. (docs.k3s.io 1) (docs.k3s.io 2) Observability means watching the cluster instead of guessing. TechHut’s monitoring guide uses Prometheus to scrape metrics, Grafana to display them, and node exporters on each machine, which matches the tooling many engineers see in production jobs. (techhut.tv) Brandon Hopkins made the tradeoff plain in a March 29, 2026 K3s homelab walkthrough: most home users with 10 to 30 containers on one server do not need Kubernetes, but people in DevOps, site reliability engineering, and infrastructure roles will keep running into it. (techhut.tv) That is the point of guides like Kumar’s. They turn a homelab from a pile of containers into a small platform with ingress, storage classes, health checks, and monitoring — closer to the systems many teams actually operate. (terminalbytes.com) (techhut.tv)
