Hey Stefan,
When i try the remove the whole "disk_config sdb" part then
setup-storage tries to resize the existing vg and is failing doing that.
That's odd behavior, don't think that should happen.
Here is the main question, is it possible to create a pv directly on a
block device without having a partition?
I am not entirely sure but I think that's possible, yes. I just ran
pvcreate /dev/sda in a test environment and created a VG and LV on top
of it just fine.
Additional question where i failed before: Is it possible to do the
same for the rootvg and boot from an "bootlv"? For the root disk i
currently use one /boot partition and the rest in an LVM.
That, too, should be possible. I think you need (at least) the lvm grub
module.
it appears that everything you want is possible but setup-storage
doesn't support it, yet. I'll try and implement a solution for your
usecase in the upcoming days.
Best regards
Kerim