Example containers that derive from (Fedora) CoreOS

Fedora CoreOS is now also an OCI container image that can be used as a base image to create bootable derivative containers.

See https://github.com/coreos/fedora-coreos-docs/pull/540 for more information about how to use this.

Additional background links are:

• https://fedoraproject.org/wiki/Changes/OstreeNativeContainer
• https://github.com/coreos/enhancements/blob/main/os/coreos-layering.md

This repository contains example containers to demonstrate functionality.

Examples

• ansible-firewalld: Demos using Ansible to configure firewalld
• build-zfs-module: Build the ZFS third party module as rpm and install it
• butane: Demos using https://github.com/coreos/butane
• convert-ubuntu-package: Convert an Ubuntu package to rpm using alien and install it.
• dracut-module: Install and run a dracut module
• initramfs-module: Demos generating a initramfs with specific modules added and omitted.
• inject-go-binary: Demos adding building and injecting a Go binary + systemd unit
• podman-next: Use COPR to install the podman-next package
• rsyslog: Install and configure rsyslog to forward to a remote host
• replace-kernel: Replace the kernel using packages from Koji
• replace-systemd: Replacing a base package, in this case systemd
• selinux: Demos changing a SELinux boolean
• tailscale: Demos https://tailscale.com/download/linux/fedora
• wifi: Install support for wireless networks along with pre-baked configuration to join a network
• loading-kernel-module: Demo loading a kernel module to the worker nodes

Running an example

• Build an image using an example from this repo and push it to an image registry:

  set IMAGE (podman build $EXAMPLE -q)
  podman push $IMAGE quay.io/$USER/$EXAMPLE

• Setup a system that has rpm-ostree installed. One possibility is using virt-install.

• Rebase the system with rpm-ostree to the image