k0s vs kind

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.

kind runs local Kubernetes clusters with Docker container nodes, mainly for Kubernetes testing; local development and CI are also listed uses. It bootstraps cluster nodes with kubeadm and supports multi-node setups, including high availability. A configuration file can define worker and control-plane nodes, port mappings, and Kubernetes versions.

The tool can build Kubernetes release builds from source or use pre-published builds. It can detect Docker, Podman, or nerdctl as its container provider, including rootless providers subject to host and provider requirements. Users can load Docker images or an image archive into a cluster. Documentation covers ingress and Gateway API configuration with cloud-provider-kind, private registry workflows, and Kubernetes API audit logging.