Introduction to kURL

The Kubernetes URL Creator is a framework for creating custom Kubernetes distributions. These distros can then be shared as URLs (to install via curl and bash) or as downloadable packages (to install in airgapped environments). kURL relies on kubeadm to bring up the Kubernetes control plane, but there are a variety of tasks a system administrator must perform both before and after running kubeadm init in order to have a production-ready Kubernetes cluster. kURL is open source, with a growing list of add-on components (including Rook, Flannel, Contour, Prometheus, and more) which is easily extensible by contributing additional add-ons.

At its core, kURL is based on kubeadm, the cluster management tool built by the core Kubernetes team and owned by sig-cluster-lifecycle. This means it benefits from the latest Kubernetes updates, patches and security hot-fixes as they are shipped by Kubernetes maintainers. kURL is a framework for declaring the layers that exist before and after the services that kubeadm provides.

Compared to standard Kubernetes distributions, it's worth emphasizing that kURL is actually a flexible Kubernetes distribution creator. Most distributions make decisions about CRI, CNI, Storage, Ingress, etc. out of the box. Comparatively, kurl.sh allows you to choose your own providers and versions of these components.

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