Buildah is a tool for creating OCI-compliant container images without requiring a background daemon process. It functions as a daemonless image constructor and distribution tool, allowing users to build, push, and pull images between local storage and remote registries.
The project distinguishes itself by supporting unprivileged image building through the use of user namespaces and rootless mode. It enables direct modification of container root filesystems by mounting them to the host, allowing images to be treated as directories that can be manipulated via standard shell commands or scripts.
The build engine supports both Dockerfile emulation and scripted image construction to generate compliant artifacts. Additional capabilities include containerized build isolation, build cache acceleration for increased speed, and the production of reproducible, bit-for-bit identical images.
The toolset also includes utilities for managing working containers, committing container state, and inspecting image metadata.