Normally the runtime image is an ext4 filesystem image that is
compressed with squashfs. dracut now supports setting up an overlayfs
when it detects a bare filesystem tree inside the squashfs.
This commit adds support for a --squashfs-only option which places the
root tree directly in the squashfs.img
This option will create an optionally compressed tarball containing a
disk image. This format is used by Google's Compute Engine.
This also adds a new option, tar_disk_name, to set the name of the disk
image that will be wrapped in the final tarball. opts.image_name
continues to be the final output file name.
If provided, round the disk image size up to a multiple of the value.
This allows for image formats with specific size-alignment requirements
(e.g., disk size must be in GiB).
If systemd's tmpfiles.d timer is executed while lorax is running it will
remove any files and directories older than 30 days. This is what has
been causing the occasional error where /proc/ would seem to vanish
during the install.
Upstream has proposed this solution, https://github.com/systemd/systemd/pull/11482
but until that is released we need a work-around to protect the lorax
files.
This commit does several things:
* Move the default tmpdir from /var/tmp/ to /var/tmp/lorax/
* Add a lorax.conf tmpfiles.d file that prevents systemd-tmpfiles from
removing anything under /var/tmp/lorax/
* Add an exit handler to lorax so that temporary directories are removed on
exit or on a python traceback.
* Use flock to lock access to the tempdir while lorax is running.
* Remove any unlocked tempdirs named /var/tmp/lorax/lorax.* at startup
Note that the exit handler will not remove the tempdir if lorax is
killed with a signal -- those are being caught by dnf and prevent the
exit handler from running.
systemd-tmpfiles cannot clean up the tempdirs at boot time because they
contain files labeled as shadow_t, so we have to remove those when lorax
runs. It uses the flock to prevent removing any directories created by
parallel instances of lorax and only removes ones that are unlocked.
Worst case they will be around until the first run of lorax after a
reboot.
If you want to keep the working directory around for debugging purposes
use --workdir /var/tmp/lorax/my-workdir and it won't be removed by
lorax.
Make runtime directly into squashfs image. This reduces largely
unreproducible ext4 layer, but requires anaconda's dracut module
modification to properly mount the image.
Pass --dnfplugin='*' to enable all of them.
Pass --dnfplugin='plugin-name' to enable one fo them. You can use it
multiple times to enable multiple plugins. Globs work as well.
Use it to override the default dracut arguments (displayed as part of
the --help output). If you want to extend the default arguments they
all need to be passed in on the cmdline as well. eg.
--dracut-arg='--xz' --dracut-arg='--install /.buildstamp' ...
Resolves: rhbz#1452220
Previously lorax had no way to use repos with self-signed certificates.
This adds the --noverifyssl cmdline option which will ignore certificate
errors.
Resolves: rhbz#1430483
This controls how big the root filesystem is for the squashfs used in
the boot.iso, the default is 2GiB.
Note that larger rootfs sizes will require more memory and may cause the
build to fail.
Fedora now has a edk2 package so use the OVMF code from there. This also
adds using a copy of OVMF_VARS for each boot instead of reusing the one
provided by the package.
