Comment # 8 on bug 1226676 from Alberto Planas Dominguez

(In reply to Jiri Bohac from comment #7)
> By default kdump relies on the /boot/vmlinuz symlink (or other image name
> variants  on non-x86 archs). This points to the last installeed kernel.
> When a specific kernel version is requested by setting KDUMP_KERNELVER=xxx
> then it relies on the /boot/vmlinuz-xxx symlink.

If a BLS-compatible bootloader is used, the kernel now lives in the ESP, a
different FAT32 partition that we mount in /boot/efi

> When I installe with sdboot, sdbootutil-rpm-scriptlets is installed instead
> of suse-module-tools-scriptlets and no such symlinks are created.

Yes, the sdbootutil-rpm-scriptlets package is in the process of being removed.
All the functionality is merged back unto the suse-module-tools-scriptlets. The
chages were submitted to Factory recently, but they are still under review

> One way of fixing this would be to create the symlinks in
> sdbootutil-rpm-scriptlets.

> Another way would be for kdump to look for the kernels elsewhere.

I prefer this option. Now suse-module-tools-scriptlets knows about BLS and
sdbootutil, that is used to install a new kernel, update initrd and create boot
entries.  For BLS the responsibility of synchronizing all the boot related
stuff is moving into sdbootutil, that under the hood uses the data provided by
bootctl, that is the real canonical source of information

Ideally mkdumprd should also known about BLS and ask bootctl about the default
boot entry, the active one, or the one that correspond to an specific kernel.
It will return the information of there it is the kernel, initrd, the cmdline
uses and all the information allocated for this entry.

> To me the post scriplet seems to be an ideal place to deal with this,
> without kdump having to embed knowledge of the location of kernel images
> which could be fragile.

That is the shift of this model. There is no need to use links to represent the
current default kernel. There are boot entries that capture this information
and a tool to retrieve it (bootctl).