Buildah - a tool which facilitates building OCI container images

================================================================

Note: this package is in alpha, but is close to being feature-complete.

The Buildah package provides a command line tool which can be used to

• create a working container, either from scratch or using an image as a starting point
• create an image, either from a working container or via the instructions in a Dockerfile
• images can be built in either the OCI image format or the traditional upstream docker image format
• mount a working container's root filesystem for manipulation
• unmount a working container's root filesystem
• use the updated contents of a container's root filesystem as a filesystem layer to create a new image
• delete a working container or an image

Changelog

Installation notes

Buildah uses runc to run commands when buildah run is used, or when buildah build-using-dockerfile encounters a RUN instruction, so you'll also need to build and install a compatible version of runc for Buildah to call for those cases.

Example

From ./examples/lighttpd.sh:

cat > lighttpd.sh <<EOF
#!/bin/bash -x

ctr1=`buildah from ${1:-fedora}`

## Get all updates and install our minimal httpd server
buildah run $ctr1 -- dnf update -y
buildah run $ctr1 -- dnf install -y lighttpd

## Include some buildtime annotations
buildah config --annotation "com.example.build.host=$(uname -n)" $ctr1

## Run our server and expose the port
buildah config $ctr1 --cmd "/usr/sbin/lighttpd -D -f /etc/lighttpd/lighttpd.conf"
buildah config $ctr1 --port 80

## Commit this container to an image name
buildah commit $ctr1 ${2:-$USER/lighttpd}
EOF

chmod +x lighttpd.sh
./lighttpd.sh

Commands

Command	Description
buildah-add(1)	Add the contents of a file, URL, or a directory to the container.
buildah-bud(1)	Build an image using instructions from Dockerfiles.
buildah-commit(1)	Create an image from a working container.
buildah-config(1)	Update image configuration settings.
buildah-containers(1)	List the working containers and their base images.
buildah-copy(1)	Copies the contents of a file, URL, or directory into a container's working directory.
buildah-from(1)	Creates a new working container, either from scratch or using a specified image as a starting point.
buildah-images(1)	List images in local storage.
buildah-inspect(1)	Inspects the configuration of a container or image.
buildah-mount(1)	Mount the working container's root filesystem.
buildah-push(1)	Copies an image from local storage.
buildah-rm(1)	Removes one or more working containers.
buildah-rmi(1)	Removes one or more images.
buildah-run(1)	Run a command inside of the container.
buildah-tag(1)	Add an additional name to a local image.
buildah-umount(1)	Unmount a working container's root file system.
buildah-version(1)	Display the Buildah Version Information

Future goals include:

• more CI tests
• additional CLI commands (?)