I currently use XEN to boot PV (paravirt) virtual server instances for
our customers. Grub2 introduced support for booting a xen kernel
directly from a guests disk image which has worked great for years. We
use the following command to build our image
grub-mkstandalone -O x86_64-xen -o grub2-x86_64.gz boot/grub/grub.cfg
What we have been seeing more and more is newer distros like Ubuntu
20.04 using lz4 compressed kernel images which will not boot and
displays the error "not xen image."
If i use the
https://raw.githubusercontent.com/torvalds/linux/master/scripts/extract-vmlinux
utility to decompress the kernel image I am able to boot it without any
issues using our current grub2 xen loader.
My question is how can I get lz4 support added into grub2 for xen? We
are willing to pay for a dev to add this support if needed as I have
limited time to really dig into this.
There are a few workarounds out their, most involve a hook that
decompresses the kernel after an update but I'm not wanting to add
complexity to the kernel update process. It leaves too much room for
error and the possibility of a clients server failing to boot after what
should of been a simple kernel upgrade.
Any help, even if just pointing me in the right direction would be
appreciated!
--
Shaun Reitan
NDCHost.com
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