yahoo-eng-team team mailing list archive

[James Falcon <1955858@xxxxxxxxxxxxxxxxxx>]

Tracked in Github Issues as https://github.com/canonical/cloud-
init/issues/3937

** Bug watch added: github.com/canonical/cloud-init/issues #3937
   https://github.com/canonical/cloud-init/issues/3937

** Changed in: cloud-init
       Status: Triaged => Expired

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to cloud-init.
https://bugs.launchpad.net/bugs/1955858

Title:
  cc_resizefs does not allocate space on all disks of a multi disk btrfs
  volume

Status in cloud-init:
  Expired

Bug description:
  cloud provider: self-hosted, proxmox

  cloud-init config:
  growpart:
    mode: auto
    devices:
      - /dev/sda1
      - /dev/sdb1
      - /dev/sdc1
      - /dev/sdd1

  I have a multi disk btrfs volume as root fs for the vm.
  Each disk needs to grow on first boot and the btrfs filesystem should be resized.
  Partitions are grown just fine and btrfs detects that, however, running `btrfs filesystem resize max /` as currently used in https://github.com/canonical/cloud-init/blob/bae9b11da9ed7dd0b16fe5adeaf4774b7cc628cf/cloudinit/config/cc_resizefs.py#L81 does not account for having multiple disks.

  From the `btrfs-filesystem` man page (debian 11, Btrfs v5.10.1):
  > The devid can be found in the output of btrfs filesystem show and defaults to 1 if not specified.

  Since a devid is not passed only the first disk will be resized, other
  disks will stay with "slack" space.

  This is after I manually resized disk id 2 for testing, before it also
  had 3GiB slack:

  root@test-vm:~# btrfs device usage /
  /dev/sda1, ID: 1
     Device size:             4.00GiB
     Device slack:            3.50KiB
     Data,RAID10:           310.25MiB
     Metadata,RAID10:        64.00MiB
     System,RAID10:           8.00MiB
     Unallocated:             3.62GiB

  /dev/sdb1, ID: 2
     Device size:             4.00GiB
     Device slack:            3.50KiB
     Data,RAID10:           310.25MiB
     Metadata,RAID10:        64.00MiB
     System,RAID10:           8.00MiB
     Unallocated:             3.62GiB

  /dev/sdc1, ID: 3
     Device size:             4.00GiB
     Device slack:            3.00GiB
     Data,RAID10:           310.25MiB
     Metadata,RAID10:        64.00MiB
     System,RAID10:           8.00MiB
     Unallocated:           640.73MiB

  /dev/sdd1, ID: 4
     Device size:             4.00GiB
     Device slack:            3.00GiB
     Data,RAID10:           310.25MiB
     Metadata,RAID10:        64.00MiB
     System,RAID10:           8.00MiB
     Unallocated:           640.73MiB

To manage notifications about this bug go to:
https://bugs.launchpad.net/cloud-init/+bug/1955858/+subscriptions