k3s

K3s - Lightweight Kubernetes
===============================================
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Lightweight Kubernetes.  Production ready, easy to install, half the memory, all in a binary less than 100 MB.

Great for:

* Edge
* IoT
* CI
* Development
* ARM
* Embedding k8s
* Situations where a PhD in k8s clusterology is infeasible

What is this?
---

K3s is a [fully conformant](https://github.com/cncf/k8s-conformance/pulls?q=is%3Apr+k3s) production-ready Kubernetes distribution with the following changes:

1. It is packaged as a single binary.
1. It adds support for sqlite3 as the default storage backend. Etcd3, MariaDB, MySQL, and Postgres are also supported.
1. It wraps Kubernetes and other components in a single, simple launcher.
1. It is secure by default with reasonable defaults for lightweight environments.
1. It has minimal to no OS dependencies (just a sane kernel and cgroup mounts needed).
1. It eliminates the need to expose a port on Kubernetes worker nodes for the kubelet API by exposing this API to the Kubernetes control plane nodes over a websocket tunnel.

K3s bundles the following technologies together into a single cohesive distribution:

* [Containerd](https://containerd.io/) & [runc](https://github.com/opencontainers/runc)
* [Flannel](https://github.com/flannel-io/flannel) for CNI
* [CoreDNS](https://coredns.io/)
* [Metrics Server](https://github.com/kubernetes-sigs/metrics-server)
* [Traefik](https://containo.us/traefik/) for ingress
* [Klipper-lb](https://github.com/k3s-io/klipper-lb) as an embedded service load balancer provider
* [Kube-router](https://www.kube-router.io/) netpol controller for n