Notice: This image will probably soon be deprecated in favor of our even smaller Alpine Linux based image. Alpine is a minimal Linux distro designed with containers in mind, based on Busybox, with a real, modern package system
The convenience of
apt-get install but for Busybox!
Using and installing packages
This image is meant to be used as the base image for Busybox-based containers. It includes glibc, uclibc, and opkg with an easy-to-use wrapper for installing packages from your Dockerfiles:
FROM progrium/busybox RUN opkg-install curl bash git CMD ["/bin/bash"]
The above Dockerfile grabs the latest package index during build, installs curl, bash, git, all their dependencies, and then deletes the local package index. The result is a Docker image that's only 10MB. Not too shabby.
Compare that to a minimal Ubuntu 12.04 (which comes with curl, bash) after installing git: 300MB.
Customizing buildroot configuration (Advanced)
If you want more control over how the rootfs is produced by customizing the buildroot config, there is some great tooling and an easy workflow. Delete the
rootfs.tar file, then:
$ cd rootfs $ make config
This will run an interactive menu inside a Docker container to configure buildroot. The resulting config will be placed at
rootfs/config. Now go back up and rebuild:
$ cd .. $ make build
This will cause buildroot to run again using rootbuilder and your config. Building will likely take a while. The result will not only be a new
rootfs.tar, but a new local Docker image tagged
This project was made possible thanks to DigitalOcean.