https://github.com/macedigital/docker-arch-systemd

Base docker image with systemd enabled
https://github.com/macedigital/docker-arch-systemd

Last synced: 16 days ago
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Base docker image with systemd enabled

• Host: GitHub
• URL: https://github.com/macedigital/docker-arch-systemd
• Owner: macedigital
• License: mit
• Created: 2014-09-13T18:18:54.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-09-13T20:29:50.000Z (over 10 years ago)
• Last Synced: 2024-10-30T07:08:51.831Z (2 months ago)
• Language: Shell
• Homepage:
• Size: 129 KB
• Stars: 0
• Watchers: 1
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# 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](https://registry.hub.docker.com/u/macedigital/docker-arch-systemd/) and can be pulled in.

## Example

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.

## Notes

* Please use a docker version after 1.2.x, which has a fix for https://github.com/dotcloud/docker/issues/2267 (`/etc/resolv.conf` and `/etc/hosts` cannot 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 permitted` on start.

* Its necessary to always mount the cgroups filesystem into the container using the `-v /sys/fs/cgroup:/sys/fs/cgroup:ro` parameter.

## Issues

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.