Running Buildah inside a container

Podman and Buildah follow a fork/exec approach that makes them very easy to run inside a container, including rootless containers scenarios.

There are many use cases that imply the need for containerized builds. Nowadays, one of the most common adoption scenarios is the application build workflow running on top of a Kubernetes cluster.

Kubernetes is basically a container orchestrator that manages the scheduling of containers from a control plane over a set of worker nodes that run a container engine compatible with the Container Runtime Interface (CRI). Its design allows great flexibility in customizing networking, storage, and runtimes, and leads to the great flourishing of side projects that are now incubating or matured inside the Cloud Native Computing Foundation (CNCF).

Vanilla Kubernetes (which is the basic community release without any customization or add-ons) doesn't have any native build feature but offers the proper framework...