k0s vs MicroShift

k0s is a free, self-hosted Kubernetes distribution for deploying workloads across public and private clouds, on-premises systems, bare metal, edge locations, and IoT environments. It comes as a single binary and needs no host operating-system components beyond the kernel. The project describes it as CNCF-certified Kubernetes and lists support for x86-64, ARM64, ARMv7, and RISC-V. Installation options include single-node, multi-node, air-gapped, and Docker methods. The k0sctl tool supports cluster lifecycle tasks such as upgrades and backup and restore. Kube-Router is the default networking option; custom CNI plugins are supported, with Calico listed as a preconfigured alternative. Datastore choices include etcd, SQLite, MySQL, and PostgreSQL. Listed security features include kube-bench, RBAC, network policies, control plane isolation, and OpenID provider support. Minimum requirements are 1 vCPU and 1 GB RAM. The project aims to keep the base versatile by limiting bundled add-ons such as ingress, service meshes, and storage. Mirantis offers support services and subscriptions.

MicroShift is a small-footprint OpenShift Kubernetes platform designed for edge computing. It aims to conserve CPU, memory, network, and storage resources and tolerate severe networking constraints. It runs as a single systemd service with a minimal OpenShift control plane and worker node. Included infrastructure services are DNS, an ingress router, service CA, OVN-Kubernetes CNI, and LVMS storage; optional components such as OLM, Gateway API, cert-manager, and SR-IOV come as separate RPM packages. The upstream build is for development and testing and runs without Red Hat subscriptions or pull secrets. Its listed operating-system options include CentOS 9 and 10, Fedora, Ubuntu, and macOS, with macOS using Podman machine in rootful mode. Minimum requirements include x86_64 or aarch64, Red Hat Enterprise Linux with Extended Update Support, 2 CPU cores, 2GB RAM, and 2GB free root storage. Production deployment can use bare metal or hypervisors supported and certified for Red Hat Enterprise Linux 9. The upstream build is free; pricing for other use is on request.