This container aggregates various tools used to build Fedora CoreOS style systems, including:
You can use podman or docker. These examples use podman. Note the
container must be privileged, as the build process uses container functionality
itself - we're using recursive containers.
Secondly, in order to build VM images, the container must have access to
/dev/kvm. If you're running this in a VM, you must enable
nested virt.
See also GCE nested virt.
Here we store data in /srv/coreos on our host system. You can choose
any directory you like.
$ mkdir /srv/coreos
$ cd /srv/coreos
$ alias coreos-assembler='podman run --rm --net=host -ti --privileged -v $(pwd):/srv --workdir /srv quay.io/cgwalters/coreos-assembler:testing'
You only need to do this once; it will create various directories and also download an installer image (used to make VMs).
$ coreos-assembler init
One thing to note is you'll have a /srv/coreos/src/config directory. By
default, this is a clone of https://github.com/cgwalters/fedora-coreos-config
If you're doing something custom, you likely want to fork it and edit. Just
replace the src/config directory with your git clone.
$ coreos-assembler build
Each build will write an ostree commit into /srv/coreos/repo as well
as generate VM images in /srv/coreos/builds/$datestamp.
The container image is built in OpenShift CI.