xenial - does not ask device to grub-install, finds /dev/vda correctly
~ # pvs
PV VG Fmt Attr PSize PFree
/dev/vda5 ubuntu-vg lvm2 a-- 29.28g 40.00m
~ # vgs
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 1 2 0 wz--n- 29.28g 40.00m
~ # lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log
Cpy%Sync Convert
root ubuntu-vg -wi-ao---- 28.29g
swap_1 ubuntu-vg -wi-ao---- 976.00m
~ # ls -lah1 /dev/disk/by-id/
drwxr-xr-x 2 120 Oct 2 17:54 .
drwxr-xr-x 5 100 Oct 2 18:05 ..
lrwxrwxrwx 1 10 Oct 2 18:07 dm-name-ubuntu--vg-root -> ../../dm-0
lrwxrwxrwx 1 10 Oct 2 18:05 dm-name-ubuntu--vg-swap_1 -> ../../dm-1
lrwxrwxrwx 1 10 Oct 2 18:07
dm-uuid-LVM-rKxFFLzSxoQE5R09qa8ztKdfGKZIxktySnE1WunTpz1cKQt8elMkWyzXF25Dhqgt ->
../../dm-0
lrwxrwxrwx 1 10 Oct 2 18:05
dm-uuid-LVM-rKxFFLzSxoQE5R09qa8ztKdfGKZIxktyoOA5IYfjtokmG0cVkmlrLRZfr0gbBZCh ->
../../dm-1
/lib/udev/rules.d # grep -ril lvm *
55-dm.rules
60-persistent-storage-dm.rules
----
bionic - does not ask device to grub-install, finds /dev/vda correctly
PV VG Fmt Attr PSize PFree
/dev/vda1 ubuntu-vg lvm2 a-- <30.00g 12.00m
~ # vgs
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 1 2 0 wz--n- <30.00g 12.00m
~ # lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log
Cpy%Sync Convert
root ubuntu-vg -wi-ao---- 29.03g
swap_1 ubuntu-vg -wi-ao---- 976.00m
~ # ls -lah1 /dev/disk/by-id/
drwxr-xr-x 2 root root 120 Oct 2 18:10 .
drwxr-xr-x 6 root root 120 Oct 2 18:27 ..
lrwxrwxrwx 1 root root 10 Oct 2 18:27 dm-name-ubuntu--vg-root
-> ../../dm-0
lrwxrwxrwx 1 root root 10 Oct 2 18:27
dm-name-ubuntu--vg-swap_1 -> ../../dm-1
lrwxrwxrwx 1 root root 10 Oct 2 18:27
dm-uuid-LVM-tuUboqieQsJtu1wB4OyTbAT5pRwXxZj7C8q7wogJHSUaOrIBRvJ2GL7ZcRFz4nCe ->
../../dm-0
lrwxrwxrwx 1 root root 10 Oct 2 18:27
dm-uuid-LVM-tuUboqieQsJtu1wB4OyTbAT5pRwXxZj7d1U7ckfbgo1bRtQnDa5XQsaoXSpjCvfV ->
../../dm-1
/lib/udev/rules.d # grep -ril lvm *
55-dm.rules
60-persistent-storage-dm.rules
95-dm-notify.rules
----
disco - does not ask, but has only /dev/vda to choose
~ # pvs
PV VG Fmt Attr PSize PFree
/dev/vda1 ubuntu-vg lvm2 a-- <30.00g 12.00m
~ # vgs
VG #PV #LV #SN Attr VSize VFree
ubuntu-vg 1 2 0 wz--n- <30.00g 12.00m
~ # lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log
Cpy%Sync Convert
root ubuntu-vg -wi-ao---- 29.03g
swap_1 ubuntu-vg -wi-ao---- 976.00m
~ # ls -lah1 /dev/disk//by-id/
drwxr-xr-x 2 root root 120 Oct 2 18:09 .
drwxr-xr-x 6 root root 120 Oct 2 18:27 ..
lrwxrwxrwx 1 root root 10 Oct 2 18:27 dm-name-ubuntu--vg-root
-> ../../dm-0
lrwxrwxrwx 1 root root 10 Oct 2 18:27
dm-name-ubuntu--vg-swap_1 -> ../../dm-1
lrwxrwxrwx 1 root root 10 Oct 2 18:27
dm-uuid-LVM-qBHgS7hD0Uk4hjhprGFLVwCUekU0i6OBbMg8u7PfVrnT4mcYKuKXRqI4ehzM7pLX ->
../../dm-0
lrwxrwxrwx 1 root root 10 Oct 2 18:27
dm-uuid-LVM-qBHgS7hD0Uk4hjhprGFLVwCUekU0i6OBjuHfJCKZ6aVKKmZHq2VxntLeR46xIexG ->
../../dm-1
/lib/udev/rules.d # grep -ril lvm *
55-dm.rules
60-persistent-storage-dm.rules
95-dm-notify.rules
----
eoan - asks device to grub-install and shows /dev/mapper as default
~ # pvs
PV VG Fmt Attr PSize PFree
/dev/vda1 vgubuntu lvm2 a-- <30.00g 12.00m
~ # vgs
VG #PV #LV #SN Attr VSize VFree
vgubuntu 1 2 0 wz--n- <30.00g 12.00m
~ # lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log
Cpy%Sync Convert
root vgubuntu -wi-ao---- 29.03g
swap_1 vgubuntu -wi-ao---- 976.00m
~ # ls -lah1 /dev/disk/by-id/
drwxr-xr-x 2 root root 160 Oct 2 19:25 .
drwxr-xr-x 7 root root 140 Oct 2 19:25 ..
lrwxrwxrwx 1 root root 10 Oct 2 19:25 dm-name-vgubuntu-root ->
../../dm-0
lrwxrwxrwx 1 root root 10 Oct 2 19:25 dm-name-vgubuntu-swap_1
-> ../../dm-1
lrwxrwxrwx 1 root root 10 Oct 2 19:25
dm-uuid-LVM-uUYPMknWpQfkO3t3oKjW16vWmUeeTItFH9kCscuyNWWYybHdrB9ZENbFXKkJZUfb ->
../../dm-1
lrwxrwxrwx 1 root root 10 Oct 2 19:25
dm-uuid-LVM-uUYPMknWpQfkO3t3oKjW16vWmUeeTItFfFw10F8npYWNaZWovPClX8tbARfym9zo ->
../../dm-0
lrwxrwxrwx 1 root root 10 Oct 2 19:25
lvm-pv-uuid-iXIOdp-tXsj-ditG-JaUC-8flA-XV51-RFV778 -> ../../vda1
/lib/udev/rules.d # grep -ril lvm *
55-dm.rules
56-lvm.rules
60-persistent-storage-dm.rules
69-lvm-metad.rules
95-dm-notify.rules
in 69-lvm-metad.rules:
# Create /dev/disk/by-id/lvm-pv-uuid-<PV_UUID> symlink for each PV
ENV{ID_FS_UUID_ENC}=="?*",
SYMLINK+="disk/by-id/lvm-pv-uuid-$env{ID_FS_UUID_ENC}"
That is the difference causing the problem, and installer should NOT
have that udev rule in order for not to have to change any logic in init
scripts for grub device detection.
----
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1838525
Title:
LVM setup fails to install grub on virtio storage
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/1838525/+subscriptions
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