Sabayon base: a Docker Project

Attention! It's under strong development

State: Alpha

The purpose of this project is to provide an image of Sabayon base. It is just a gentoo stage3 + entropy

UPDATE: Images are also on Docker Hub sabayon/base-amd64 and the already squashed image, sabayon/base-amd64-squashed

First steps on docker

Ensure to have the daemon started and running:

sudo systemctl start docker

Building sabayon-base locally

git clone https://github.com/mudler/docker-sabayon-base-amd64.git docker-sabayon-base
cd docker-sabayon-base
sudo docker build -t sabayon/base-amd64 .

Pulling sabayon-base from Docker Hub

sudo docker pull sabayon/base-amd64

Converting the image from Docker to use it with Molecules

Only with undocker, without squashing the layers

After pulling the docker image, install undocker and then as root:

docker save sabayon/base-amd64:latest | undocker -i -o base sabayon/base-amd64:latest

Using docker-squash

You can also squash the image with docker-squash and then extract your layers.

sudo docker save sabayon/base-amd64:latest | sudo TMPDIR=/dev/shm docker-squash -t sabayon/base-amd64:squashed > /your/prefered/path/base.tar

You can replace /dev/shm with your prefered tmpdir

With undocker, but squashing the layers

The squash can also been accomplished creating a container from the image, exporting it and then importing it back.

sudo docker run -t -i sabayon/base-amd64:latest /bin/bash
$ exit # You should drop in a shell, exit, you should see a container id, otherwise find it :
sudo docker ps -l
sudo docker export <CONTAINER ID> | docker import - sabayon/base-amd64:squashed
docker save sabayon/base-amd64:squashed | undocker -i -o base sabayon/base-amd64:squashed

Docker will loose the history revision and then you can estract the layer, using as base for chroot.

You now have the tree on the base/ directory

If you are planning to use the resulting files as a chroot, don't forget to set a nameserver on resolv.conf file

echo "nameserver 208.67.222.222" > base/etc/resolv.conf