Machine OS Images

This repo builds a container image that contains the latest CoreOS ISO and can regurgitate it or the corresponding PXE files (kernel, initrd, rootfs).

Building the image

By default, the ISO is downloaded from the lookaside cache available only in OpenShift CI. To download directly (for local builds, or OKD), set the arg DIRECT_DOWNLOAD=true (the make build target sets this for you).

Retrieving the Machine OS

The scripts /bin/copy-iso and /bin/copy-pxe can be used to copy the ISO and PXE files respectively to a volume that is bound into the container. Pass the destination path as an argument. For example:

podman run --rm -v .:/data:bind /bin/copy-iso /data

For the copy-iso script, if the IP_OPTIONS environment variable is non-empty then the output ISO will be configured to add the provided option to the kernel command line.

The script /bin/copy-metal calls copy-iso and copy-pxe to copy the specific files needed for parts of the baremetal platform, depending on the first argument: --all for all files; --pxe for just the PXE files; or --image-build for just the ISO and initrd. In addition, symlinks are created so that filenames match the ones used in previous versions of the metal platform.