Ubuntu
debian-installer package

  1. Bug #1838525
  2. Comment #28

Comment 28 for bug 1838525

Revision history for this message
Rafael David Tinoco (rafaeldtinoco) wrote :

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

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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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