debcrafters-packages team mailing list archive

[Ural Tunaboyu <1887558@xxxxxxxxxxxxxxxxxx>]

Ubuntu 24.10 (Oracular Oriole) has reached end of life, so this bug will
not be fixed for that specific release.

** Changed in: bcache-tools (Ubuntu Oracular)
       Status: Triaged => Won't Fix

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https://bugs.launchpad.net/bugs/1887558

Title:
  multipathd bcache disks do not get picked up by multipath-tools during
  boot

Status in bcache-tools:
  New
Status in MAAS:
  Fix Released
Status in MAAS 3.3 series:
  Fix Released
Status in MAAS 3.4 series:
  Fix Released
Status in bcache-tools package in Ubuntu:
  Triaged
Status in bcache-tools source package in Jammy:
  New
Status in bcache-tools source package in Noble:
  Triaged
Status in bcache-tools source package in Oracular:
  Won't Fix

Bug description:
  [ Impact ]

  When using multipathd disks as bcache, multipath-tools does not pick
  the disks up at boot time.

  This is due to an interaction between bcache-tools and multipath-
  tools. The udev rules for bcache-tools, specifically
  /lib/udev/rules.d/69-bcache.rules occupies the disk during boot so
  multipath-tools fails to interact with the disks.

  [ Test Case ]

  1) get an image
  $ wget https://cdimage.ubuntu.com/ubuntu-server/daily-live/pending/noble-live-server-amd64.iso

  2) Create bcache disk
  $ fallocate -l 20G image.img
  $ make-bcache -C image.img

  3) Boot into iso with multipathed bcache disk
  $ kvm -m 2048 -boot d -cdrom ./noble-live-server-amd64.iso -device virtio-scsi-pci,id=scsi -drive file=image.img,if=none,id=sda,format=raw,file.locking=off -device scsi-hd,drive=sda,serial=0001 -drive if=none,id=sdb,file=image.img,format=raw,file.locking=off -device scsi-hd,drive=sdb,serial=0001

  Select "Try or install Ubuntu" wait for the OS to load. Press F2 to
  escape to a shell to check multipathed devices.

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