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[Steve Langasek <steve.langasek@xxxxxxxxxxxxx>]

Public bug reported:

A freshly build Ubuntu 17.10 image that's configured to boot without
initramfs by passing root=PARTUUID=<uuid> on the kernel commandline
comes up degraded because cloud-init fails to resize the root partition.

Oct 20 00:07:30 ubuntu cloud-init[493]: 2017-10-20 00:07:30,656 - util.py[WARNING]: Failed to resize filesystem (cmd=('resize2fs', '/dev/root'))
Oct 20 00:07:30 ubuntu cloud-init[493]: 2017-10-20 00:07:30,662 - util.py[WARNING]: Running module resizefs (<module 'cloudinit.config.cc_resizefs' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_resizefs.py'>) failed

Looking at the code, I see that there are two separate implementations
of rootdev_from_cmdline, one in cloudinit/util.py and one in
cloudinit/config/cc_resizefs.py; and the second does not handle
partuuid.

>>> from cloudinit.util import rootdev_from_cmdline
>>> rootdev_from_cmdline('BOOT_IMAGE=/boot/vmlinuz-4.4.0-1007-kvm root=PARTUUID=f122607f-3631-4411-bd34-de4bed76e0f7 ro console=tty1 console=ttyS0 systemd.log_level=debug')
'/dev/disk/by-partuuid/f122607f-3631-4411-bd34-de4bed76e0f7'
>>> from cloudinit.config.cc_resizefs import rootdev_from_cmdline
>>> rootdev_from_cmdline('OT_IMAGE=/boot/vmlinuz-4.4.0-1007-kvm root=PARTUUID=f122607f-3631-4411-bd34-de4bed76e0f7 ro console=tty1 console=ttyS0 systemd.log_level=debug')
'/dev/PARTUUID=f122607f-3631-4411-bd34-de4bed76e0f7'
>>>

This is related to bug #1684869; I'm not sure if it's the same bug
reintroduced or if was never fixed properly on trunk (17.1).

** Affects: cloud-init
     Importance: Undecided
         Status: New

** Affects: cloud-init (Ubuntu)
     Importance: Medium
         Status: New

** Also affects: cloud-init (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: cloud-init (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1725067

Title:
  cloud-init resizefs fails when booting with root=PARTUUID=

Status in cloud-init:
  New
Status in cloud-init package in Ubuntu:
  New

Bug description:
  A freshly build Ubuntu 17.10 image that's configured to boot without
  initramfs by passing root=PARTUUID=<uuid> on the kernel commandline
  comes up degraded because cloud-init fails to resize the root
  partition.

  Oct 20 00:07:30 ubuntu cloud-init[493]: 2017-10-20 00:07:30,656 - util.py[WARNING]: Failed to resize filesystem (cmd=('resize2fs', '/dev/root'))
  Oct 20 00:07:30 ubuntu cloud-init[493]: 2017-10-20 00:07:30,662 - util.py[WARNING]: Running module resizefs (<module 'cloudinit.config.cc_resizefs' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_resizefs.py'>) failed

  Looking at the code, I see that there are two separate implementations
  of rootdev_from_cmdline, one in cloudinit/util.py and one in
  cloudinit/config/cc_resizefs.py; and the second does not handle
  partuuid.

  >>> from cloudinit.util import rootdev_from_cmdline
  >>> rootdev_from_cmdline('BOOT_IMAGE=/boot/vmlinuz-4.4.0-1007-kvm root=PARTUUID=f122607f-3631-4411-bd34-de4bed76e0f7 ro console=tty1 console=ttyS0 systemd.log_level=debug')
  '/dev/disk/by-partuuid/f122607f-3631-4411-bd34-de4bed76e0f7'
  >>> from cloudinit.config.cc_resizefs import rootdev_from_cmdline
  >>> rootdev_from_cmdline('OT_IMAGE=/boot/vmlinuz-4.4.0-1007-kvm root=PARTUUID=f122607f-3631-4411-bd34-de4bed76e0f7 ro console=tty1 console=ttyS0 systemd.log_level=debug')
  '/dev/PARTUUID=f122607f-3631-4411-bd34-de4bed76e0f7'
  >>>

  This is related to bug #1684869; I'm not sure if it's the same bug
  reintroduced or if was never fixed properly on trunk (17.1).

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