Initial Commit

.dockerignore

@@ -0,0 +1,13 @@
+.DS_Store
+*/.DS_Store
+
+.git/
+
+Makefile
+README.md
+Vagrantfile
+.vagrant/
+
+output/
+.ccache/
+.dl/

.gitignore

@@ -0,0 +1,7 @@
+.DS_Store
+
+.vagrant/
+
+output/
+.ccache/
+.dl/

Dockerfile

@@ -0,0 +1,63 @@
+FROM ubuntu:14.04.2
+
+ENV TERM xterm
+
+RUN apt-get update && \
+    apt-get install -y ca-certificates curl git && \
+    apt-get install -y unzip bc wget python xz-utils build-essential libncurses5-dev && \
+    apt-get install -y syslinux xorriso && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+# Setup Buildroot
+ENV SRCDIR /build
+RUN mkdir -p ${SRCDIR}
+
+ENV BUILDROOT_VERSION 2015.05
+ENV BUILDROOT ${SRCDIR}/buildroot
+RUN cd ${SRCDIR} && \
+    curl -OL http://buildroot.uclibc.org/downloads/buildroot-${BUILDROOT_VERSION}.tar.bz2 && \
+    tar xf buildroot-${BUILDROOT_VERSION}.tar.bz2 && \
+    mv buildroot-${BUILDROOT_VERSION} buildroot && \
+    rm -f buildroot-${BUILDROOT_VERSION}.tar.bz2
+
+# Setup overlay
+ENV OVERLAY /overlay
+RUN mkdir -p ${OVERLAY}
+WORKDIR ${OVERLAY}
+
+COPY overlay ${OVERLAY}
+
+ENV VERSION 0.9.5
+RUN mkdir -p etc && \
+    echo ${VERSION} > etc/version && \
+    echo "NAME=\"DockerRoot\"" > etc/os-release && \
+    echo "VERSION=${VERSION}" >> etc/os-release && \
+    echo "ID=docker-root" >> etc/os-release && \
+    echo "ID_LIKE=busybox" >> etc/os-release && \
+    echo "VERSION_ID=${VERSION}" >> etc/os-release && \
+    echo "PRETTY_NAME=\"DockerRoot v${VERSION}\"" >> etc/os-release
+
+# Add ca-certificates
+RUN mkdir -p etc/ssl/certs && \
+    cp /etc/ssl/certs/ca-certificates.crt etc/ssl/certs/
+
+# Add Docker
+ENV DOCKER_VERSION 1.7.1
+RUN mkdir -p bin && \
+    curl -L https://get.docker.io/builds/Linux/x86_64/docker-${DOCKER_VERSION} \
+       -o bin/docker && \
+    chmod +x bin/docker
+
+# Copy config files
+COPY configs ${SRCDIR}/configs
+RUN cd ${SRCDIR} && \
+    cp configs/buildroot.config ${BUILDROOT}/.config && \
+    cp configs/busybox.config ${BUILDROOT}/package/busybox/busybox.config
+
+COPY scripts ${SRCDIR}/scripts
+
+VOLUME ${BUILDROOT}/ccache
+VOLUME ${BUILDROOT}/dl
+
+WORKDIR ${BUILDROOT}
+CMD ["/build/scripts/build.sh"]

Makefile

@@ -0,0 +1,87 @@
+KERNEL_VERSION  := 4.0.9
+BUSYBOX_VERSION := 1.23.2
+
+TARGETS := output/rootfs.tar.xz output/bzImage output/docker-root.iso
+SOURCES := Dockerfile \
+	configs/buildroot.config \
+	configs/busybox.config \
+	configs/kernel.config \
+	configs/user.config \
+	configs/isolinux.cfg \
+	overlay/etc/profile.d/optbin.sh \
+	overlay/etc/profile.d/version.sh \
+	overlay/etc/skel/.wgetrc \
+	overlay/etc/sudoers.d/docker \
+	overlay/etc/sysctl.conf \
+	overlay/init \
+	overlay/sbin/shutdown \
+	overlay/usr/bin/respawn \
+	scripts/build.sh \
+	scripts/post_build.sh \
+	scripts/post_image.sh
+
+BUILD_IMAGE     := docker-root-builder
+BUILD_CONTAINER := docker-root-built
+
+BUILT := `docker ps -aq -f name=$(BUILD_CONTAINER) -f exited=0`
+
+CCACHE_DIR := /mnt/sda1/ccache
+
+all: $(TARGETS)
+
+$(TARGETS): build | output
+	docker cp $(BUILD_CONTAINER):/build/buildroot/output/images/$(@F) output/
+
+build: $(SOURCES) | .dl
+	$(eval SRC_UPDATED=$$(shell stat -f "%m" $^ | sort -gr | head -n1))
+	$(eval STR_CREATED=$$(shell docker inspect -f '{{.Created}}' $(BUILD_IMAGE) 2>/dev/null))
+	$(eval IMG_CREATED=`date -j -u -f "%F %T" "$$(STR_CREATED)" +"%s" 2>/dev/null || echo 0`)
+	@if [ "$(SRC_UPDATED)" -gt "$(IMG_CREATED)" ]; then \
+		set -e; \
+		docker build -t $(BUILD_IMAGE) .; \
+		(docker rm -f $(BUILD_CONTAINER) || true); \
+	fi
+	@if [ "$(BUILT)" == "" ]; then \
+		set -e; \
+		(docker rm -f $(BUILD_CONTAINER) || true); \
+		docker run -v $(CCACHE_DIR):/build/buildroot/ccache \
+			-v /vagrant/.dl:/build/buildroot/dl --name $(BUILD_CONTAINER) $(BUILD_IMAGE); \
+	fi
+
+output .ccache .dl:
+	mkdir -p $@
+
+clean:
+	$(RM) -r output
+	-docker rm -f $(BUILD_CONTAINER)
+
+distclean: clean
+	$(RM) -r .ccache .dl
+	-docker rmi $(BUILD_IMAGE)
+	vagrant destroy -f
+	$(RM) -r .vagrant
+
+.PHONY: all build clean distclean
+
+vagrant:
+	-vagrant resume
+	-vagrant reload
+	vagrant up --no-provision
+	vagrant provision
+	vagrant ssh -c 'sudo mkdir -p $(CCACHE_DIR)'
+
+config: | output
+	docker cp docker-root-built:/build/buildroot/.config output/
+	mv output/.config output/buildroot.config
+	docker cp docker-root-built:/build/buildroot/output/build/busybox-$(BUSYBOX_VERSION)/.config output/
+	mv output/.config output/busybox.config
+	docker cp docker-root-built:/build/buildroot/output/build/linux-$(KERNEL_VERSION)/.config output/
+	mv output/.config output/kernel.config
+
+install:
+	cp output/bzImage ../rancheros-lite/iso/
+	cp output/rootfs.tar.xz ../rancheros-lite/iso/
+	cp output/kernel.config ../rancheros-lite/vboxguest/
+	cp output/docker-root.iso ../rancheros-lite/
+
+.PHONY: vagrant config install

README.md

@@ -0,0 +1,18 @@
+# DockerRoot
+
+DockerRoot (formerly [RancherOS Lite](https://github.com/ailispaw/rancheros-lite)) is a lightweight Linux distribution made with [Buildroot](http://buildroot.uclibc.org/) especially to run a [Docker](https://www.docker.com/) daemon as PID 1.
+
+This is inspired by the following projects.
+
+- [Only Docker](https://github.com/ibuildthecloud/only-docker)
+- [RancherOS](https://github.com/rancherio/os)
+- [RancherOS Base System](https://github.com/rancher/os-base)
+- [Boot2Docker](https://github.com/boot2docker/boot2docker)
+- [DhyveOS](https://github.com/nlf/dhyve-os)
+
+## Features
+
+- Based on Buildroot 2015.05 with Linux kernel v4.0.9 and GLIBC.
+- Runs a Docker daemon as PID 1
+- Default username: docker
+- Default password: docker

Vagrantfile

@@ -0,0 +1,20 @@
+Vagrant.configure(2) do |config|
+  config.vm.define "docker-root"
+
+  config.vm.box = "ailispaw/rancheros-lite"
+
+  config.vm.provider :virtualbox do |vb|
+    vb.memory = 2048
+  end
+
+  config.vm.hostname = "docker-root"
+
+  config.vm.network "private_network", ip: "192.168.33.10"
+
+  config.vm.synced_folder ".", "/vagrant", type: "nfs", mount_options: ["nolock", "vers=3", "udp"]
+
+  # Adjusting datetime before provisioning.
+  config.vm.provision :shell, run: "always" do |sh|
+    sh.inline = "sntp -4sSc pool.ntp.org; date"
+  end
+end