For the LightBuildServer (LBS) I want to run some of my nightly builds already against Fedora 25 Beta, to see if I need to fix anything in the Mono packages for Fedora.
But there is no Beta image for Fedora 25 available at Docker Hub: https://hub.docker.com/_/fedora/
But here you can find an image for Fedora 25 Beta: https://getfedora.org/fi/cloud/prerelease/docker.html
So I download the image, and load the image like this:
cd /var/lib/docker wget https://download.fedoraproject.org/pub/fedora/linux/releases/test/25_Beta/Docker/x86_64/images/Fedora-Docker-Base-25_Beta-1.1.x86_64.tar.xz docker load -i /var/lib/docker/Fedora-Docker-Base-25_Beta-1.1.x86_64.tar.xz
You can see the image listed, when typing
REPOSITORY TAG IMAGE ID CREATED SIZE fedora-docker-base-25_beta-1.1.x86_64 latest a85629813141 8 days ago 197.8 MB
Now I can reference it in my Dockerfile like this:
Make sure to use the image name in lower case.