Systemd inside ArchLinux
A base Dockerfile with which it is easy to build more specialized systemd-enabled containers.
Prebuild images are available at docker-hub and can be pulled in.
Lets build an image for running a nginx webserver:
Save the following lines in a file called
Dockerfile and run
docker build -t nginx-test ..
FROM macedigital/docker-arch-systemd RUN pacman -S nginx --noconfirm; systemctl enable nginx.service EXPOSE 80 CMD ["/usr/sbin/init"]
After its done, you can run the following command:
docker run --privileged=true -p 127.0.0.1:8888:80 -v /sys/fs/cgroup:/sys/fs/cgroup:ro nginx-test
Voila, go to localhost:8888 on your host machine and rejoice.
Please use a docker version after 1.2.x, which has a fix for https://github.com/dotcloud/docker/issues/2267 (
/etc/hostscannot be mounted read-only).
You cannot run any such build containers if your host OS does not support systemd (sorry, Ubuntu).
At the moment of writing, all containers must be run in privileged mode. Otherwise you will encounter this message
Failed to mount tmpfs at /run: Operation not permittedon start.
Its necessary to always mount the cgroups filesystem into the container using the
The base Dockerfile should work quite well for any more special purpose build. Nonetheless, feel free to use the issue tracker if you feel something is not right. Also, pull requests are welcomed.