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[Serge Hallyn <1551854@xxxxxxxxxxxxxxxxxx>]

Note - I am not actively looking at this bug as I've not managed to
reproduce it.  Hopefully the kernel team has it under control, please
shout if I'm needed.

If using juju first is a prerequisite to reproducing this, I can try
that, but my impression from previous reports has been that this is not
supposed to be a requirement, so I think something else is triggering it
which I'm missing.

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https://bugs.launchpad.net/bugs/1551854

Title:
  LXD bootstrap issues on xenial

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm using lxd with zfs block storage on xenial, and having issues with
  trusty containers. I've witnessed this problem when trying to
  bootstrap as well as after rebooting the host and a container failed
  to start.

  In the latter case, the container that failed to start was the juju
  controller:

  c@mawhrin-skel:~/omnibus-layers$ lxc list                                                                                                        [3/3]
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+
  |                        NAME                         |  STATE  |              IPV4              | IPV6 |    TYPE    | SNAPSHOTS |
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+
  | juju-5f4bd172-ad22-4726-8d84-47185ab31b54-machine-0 | STOPPED |                                |      | PERSISTENT |         0 |
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+
  | juju-5f4bd172-ad22-4726-8d84-47185ab31b54-machine-1 | RUNNING | 10.0.3.28 (eth0)               |      | PERSISTENT |         0 |
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+
  | juju-5f4bd172-ad22-4726-8d84-47185ab31b54-machine-2 | RUNNING | 10.0.3.85 (eth0)               |      | PERSISTENT |         0 |
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+
  | juju-5f4bd172-ad22-4726-8d84-47185ab31b54-machine-3 | RUNNING | 10.0.3.176 (eth0)              |      | PERSISTENT |         0 |
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+
  | juju-5f4bd172-ad22-4726-8d84-47185ab31b54-machine-4 | RUNNING | 10.0.3.66 (eth0)               |      | PERSISTENT |         0 |
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+
  | juju-5f4bd172-ad22-4726-8d84-47185ab31b54-machine-5 | RUNNING | 10.0.3.31 (eth0)               |      | PERSISTENT |         0 |
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+
  | juju-5f4bd172-ad22-4726-8d84-47185ab31b54-machine-6 | RUNNING | 10.0.3.196 (eth0)              |      | PERSISTENT |         0 |
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+
  | juju-5f4bd172-ad22-4726-8d84-47185ab31b54-machine-7 | RUNNING | 10.0.3.186 (eth0)              |      | PERSISTENT |         0 |
  |                                                     |         | 10.0.4.1 (lxcbr0)              |      |            |           |
  +-----------------------------------------------------+---------+--------------------------------+------+------------+-----------+

  I manually started it, but found that no upstart services were
  started. Remembering this thread,
  https://lists.ubuntu.com/archives/juju/2016-February/006698.html, I
  checked /var/log/mountall.log in the machine-0 container, and sure
  enough:

  root@juju-5f4bd172-ad22-4726-8d84-47185ab31b54-machine-0:~# cat /var/log/upstart/mountall.log
  mount: permission denied
  mountall: mount /sys/kernel/debug [187] terminated with status 32
  mountall: Filesystem could not be mounted: /sys/kernel/debug

  The problem persists if I stop and start the container. If I remount
  /sys/kernel/debug on the host, then stop and start the container,
  upstart succeeds and the juju controller starts up.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-8-generic 4.4.0-8.23
  ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2
  Uname: Linux 4.4.0-8-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  c         24562 F.... pulseaudio
  CurrentDesktop: MATE
  Date: Tue Mar  1 10:52:45 2016
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=007cedda-f922-4e4c-89b1-57b31f18292e
  InstallationDate: Installed on 2016-02-28 (2 days ago)
  InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224)
  MachineType: LENOVO 2306CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-8-generic.efi.signed root=/dev/mapper/ubuntu--mate--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-8-generic N/A
   linux-backports-modules-4.4.0-8-generic  N/A
   linux-firmware                           1.156
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/22/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ETA1WW (2.61 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2306CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG2ETA1WW(2.61):bd04/22/2014:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2306CTO
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO

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