K3s vs Kubus

K3s is a certified, lightweight Kubernetes distribution for IoT and edge computing. It runs self-hosted on Linux and is released for x86_64, ARMv7, and ARM64. The distribution arrives as one binary or a minimal container image; the site describes the binary as under 70 MB, while documentation says under 100 MB. Documented uses include edge systems, homelabs, IoT, continuous integration, development, ARM single-board computers, air-gapped environments, and embedded Kubernetes. SQLite is the default datastore, with etcd, MySQL, and Postgres available. K3s packages containerd or cri-dockerd, Flannel, CoreDNS, Traefik, ServiceLB, Kube-router, local-path-provisioner, and Spegel. High-availability deployments can use embedded storage or external MySQL, PostgreSQL, or etcd. Air-gapped installation supports private registries, manually deployed images, or an embedded registry mirror. Security guidance includes hardening and CIS self-assessment material. Automated Kubernetes-native upgrades use Rancher’s system-upgrade-controller.

Kubus is a free, open-source Kubernetes GUI that runs locally and brings cluster resources, logs, shells, port forwards, metrics, and Helm into one desktop app. It can combine selected kubeconfig contexts in merged lists, with a cluster column identifying each resource's context. Alongside built-in Kubernetes resource types, it discovers custom resource definitions live. For troubleshooting, Kubus streams logs from multiple pods and provides container terminals, ephemeral debug containers, and node shells. Users can browse, install, upgrade, roll back, and uninstall Helm releases without the Helm binary. Kubus uses existing kubeconfig credentials and supports GKE, EKS, and AKS through their credential plugins; connections can also use SSH jump hosts or SOCKS and HTTP proxies. The local server binds to 127.0.0.1, and the maker says there is no cloud, account, or telemetry; Secret values are redacted by default. It is available on Windows, macOS, and Linux, though new releases no longer support Intel Macs. Metrics and health charts require metrics-server in the cluster.