1d476dd994
When the kernel gets installed on Fedora, the rpm post scripts call "/bin/kernel-install" [1] to install it. This is a script provided by systemd. However, in [2], Fedora ships a patch to kernel-install that makes a call-out to /sbin/new-kernel-pkg -- the install script provided by grubby [3] Without grubby installed, systemd's kernel-install script goes off and runs dracut plugins directly [4], which eventually creates the initrd. For reasons that are not clearly explained, the initrd will end up in a a "machine-id" sub-directory of /boot (possibly, so you can symlink it?). It is also called "initrd", even though it's an initramfs, for historical reasons in dracut I think. It is at this point that I think 99-ramdisk has been written to move the generated initrd file back into /boot. Later on, when we build the image, we run grub-install and it picks up the kernel and the initrd and installs everything. grubby's new-kernel-pkg [6] it's very similar -- it uses dracut to make the initramfs ... but in this case it is put in /boot and is actually called initramfs. The subtle change that led me down this path is that dracut has been modified to have a "Recommends" for grubby for >F22 [7]. After discussing this change with the author, it turns out it was *always* intended to use the grubby-based kernel install scripts for Fedora -- our builds have been incorrect in not including the package. The author got sick of people removing the package and making unbootable systems, hence the change. Thus this removes the workarounds in 99-ramdisk and replace it with an install of the grubby package. grubby's kernel install script will put the kernel & generated initramfs in /boot, and it will be installed correctly via the usual grub install later when we build the disk image. I have built F22 & F23 fedora-minimal images with this and they boot. [1] http://pkgs.fedoraproject.org/cgit/kernel.git/tree/kernel.spec#n1832 [2] http://pkgs.fedoraproject.org/cgit/systemd.git/tree/kernel-install-grubby.patch [3] http://linux.die.net/man/8/new-kernel-pkg [4] https://github.com/haraldh/dracut/blob/master/50-dracut.install [5] |
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| .. | ||
| install.d | ||
| pre-install.d | ||
| root.d | ||
| element-deps | ||
| package-installs.yaml | ||
| pkg-map | ||
| README.rst | ||
=========== yum-minimal =========== Base element for creating minimal yum-based images. This element is incomplete by itself, you'll want to use the centos-minimal or fedora-minimal elements to get an actual base image. Use of this element will require 'yum' and 'yum-utils' to be installed on Ubuntu and Debian. Nothing additional is needed on Fedora or CentOS. The `DIB_OFFLINE` or more specific `DIB_YUMCHROOT_USE_CACHE` variables can be set to prefer the use of a pre-cached root filesystem tarball.