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[Launchpad Bug Tracker <1692093@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package cloud-init - 0.7.9-153-g16a7302f-
0ubuntu1~16.10.1

---------------
cloud-init (0.7.9-153-g16a7302f-0ubuntu1~16.10.1) yakkety-proposed; urgency=medium

  * New upstream snapshot.
    - net: fix reading and rendering addresses in cidr format.
      [Dimitri John Ledkov] (LP: #1689346, #1684349)
    - disk_setup: udev settle before attempting partitioning or fs creation.
      (LP: #1692093)
    - GCE: Update the attribute used to find instance SSH keys.
      [Daniel Watkins] (LP: #1693582)
    - nplan: For bonds, allow dashed or underscore names of keys.
      [Dimitri John Ledkov] (LP: #1690480)
    - tests: python2.6: fix unit tests usage of assertNone and format.
    - tests: update docstring on test_configured_list_with_none
    - fix tools/ds-identify to not write None twice.
    - tox/build: do not package depend on style requirements.
    - tests: ntp: Restructure cc_ntp unit tests. [Chad Smith]
    - flake8: move the pinned version of flake8 up to 3.3.0
    - tests: Apply workaround for snapd bug in test case. [Joshua Powers]
    - RHEL/CentOS: Fix dual stack IPv4/IPv6 configuration.  [Andreas Karis]
    - disk_setup: fix several issues with gpt disk partitions. (LP: #1692087)
    - function spelling & docstring update [Joshua Powers]
    - tests: Fix unittest bug in ntp tests. [Joshua Powers]
    - tox: move pylint target to 1.7.1
    - Fix get_interfaces_by_mac for empty macs (LP: #1692028)
    - DigitalOcean: remove routes except for the public interface.
      [Ben Howard] (LP: #1681531.)
    - netplan: pass macaddress, when specified, for vlans
      [Dimitri John Ledkov] (LP: #1690388)
    - doc: various improvements for the docs on cc_users_groups.
      [Felix Dreissig]
    - cc_ntp: write template before installing and add service restart
      [Ryan Harper] (LP: #1645644)
    - tests: fix cloudstack unit tests to avoid accessing
      /var/lib/NetworkManager [Lars Kellogg-Stedman]
    - tests: fix hardcoded path to mkfs.ext4 [Joshua Powers] (LP: #1691517)
    - Actually skip warnings when .skip file is present.
      [Chris Brinker] (LP: #1691551)
    - netplan: fix netplan render_network_state signature.
      [Dimitri John Ledkov] (LP: #1685944)
    - Azure: fix reformatting of ephemeral disks on resize to large types.
      (LP: #1686514)
    - make deb: Add devscripts dependency for make deb.
      Cleanup packages/bddeb. [Chad Smith] (LP: #1685935)
    - openstack: fix log message copy/paste typo in _get_url_settings
      [Lars Kellogg-Stedman]
    - unittests: fix unittests run on centos [Joshua Powers]
    - Improve detection of snappy to include os-release and kernel cmdline.
      (LP: #1689944)
    - Add address to config entry generated by _klibc_to_config_entry.
      [Julien Castets] (LP: #1691135)
    - sysconfig: Raise ValueError when multiple default gateways are present.
      [Chad Smith] (LP: #1687485)
    - FreeBSD: improvements and fixes for use on Azure
      [Hongjiang Zhang] (LP: #1636345)
    - Add unit tests for ds-identify, fix Ec2 bug found.
    - fs_setup: if cmd is specified, use shell interpretation.
      [Paul Meyer] (LP: #1687712)
    - doc: document network configuration defaults policy and formats.
      [Ryan Harper]
    - doc: Fix name of "uri" key in docs for "cc_apt_configure" module
      [Felix Dreissig]
    - tests: Enable artful in integration tests [Joshua Powers]

 -- Scott Moser <smoser@xxxxxxxxxx>  Fri, 26 May 2017 16:08:21 -0400

** Changed in: cloud-init (Ubuntu Yakkety)
       Status: Fix Committed => Fix Released

** Changed in: cloud-init (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1692093

Title:
  Cloud init is re-executing fs and disk setup during reboot

Status in cloud-init:
  Fix Committed
Status in cloud-init package in Ubuntu:
  Fix Released
Status in cloud-init source package in Xenial:
  Fix Released
Status in cloud-init source package in Yakkety:
  Fix Released
Status in cloud-init source package in Zesty:
  Fix Released

Bug description:
  === Begin SRU Template ===
  [Impact]
  VMs on MS Azure have an ephemeral disk attached to them.
  On first boot, cloud-init properly notices the empty ntfs filesystem and
  reformats it ext4.

  After deallocating the instance or moving to a new azure host,
  the filesystem reformat is logged, but isn't actually performed because
  the udev device creation may not have settled.

  [Test Case]
  Test cases:
   1. Deploy an instance VM on Azure
   2. Log in and ensure that the ephemeral disk is formatted and mounted to /mnt
   3. Via the portal you can "Redeploy" the VM to a new Azure Host (or alternatively stop and deallocate the VM for some time, and then restart/reallocate the VM).

  Expected Results:a
   - Check cloud-init.log expecting to see logs from cc_disk_setup about the mount.
   - After reallocation we expect the ephemeral disk to be formatted and mounted to /mnt.

  Actual Results:
   - After reallocation /mnt is not mounted and there are errors in the cloud-init log.

  [Regression Potential]
  Regression potential should be extremely low on this change.
  Essentially the change was to add the function 'assert_and_settle_device' and
  then to use it.  See the commit linked below.

  The most likely regression is just slower boot.  The most likely
  unexpected change in behavior is getting a RunTimeError due to
  'assert_and_settle_device' realizing that there is no device present.
  That would have ultimately just resulted in a different error with
  less obvious error message.

  [Other Info]
  Upstream commit at
    https://git.launchpad.net/cloud-init/commit/?id=1815c6d801933c47a01f1a94a8e689824f6797b4

  === End SRU Template ===

  Cloud Provider: Azure
  dpkg-query -W -f='${Version}' cloud-init output: 0.7.9-90-g61eb03fe-0ubuntu1~16.04.1

  When the following is specified in cloud init it seems to be re-executing fs and disk setup (even though run command does not seem to re run)
  disk_setup:
    /dev/sdc:
        table_type: gpt
        layout: true
        overwrite: false

  fs_setup:
  - label: etcd_disk
    filesystem: ext4
    device: /dev/sdc1
    extra_opts:
      - "-F"
      - "-E"
      - "lazy_itable_init=1,lazy_journal_init=1"

  mounts:
  - - /dev/sdc1
    - /var/lib/etcddisk

  From cloud-init-output.log:

  Cloud-init v. 0.7.9 running 'modules:final' at Mon, 15 May 2017 18:33:15 +0000. Up 64.24 seconds.
  Cloud-init v. 0.7.9 finished at Mon, 15 May 2017 18:34:46 +0000. Datasource DataSourceAzureNet [seed=/dev/sr0].  Up 155.34 seconds
  Cloud-init v. 0.7.9 running 'init-local' at Tue, 16 May 2017 01:52:37 +0000. Up 10.33 seconds.
  Cloud-init v. 0.7.9 running 'init' at Tue, 16 May 2017 01:52:39 +0000. Up 12.06 seconds.

  From cloud-init.log for the initial provision:

  2017-05-15 18:32:46,820 - cc_disk_setup.py[DEBUG]: Creating file system etcd_disk on /dev/sdc1
  2017-05-15 18:32:46,820 - cc_disk_setup.py[DEBUG]:      Using cmd: /sbin/mkfs.ext4 /dev/sdc1 -L etcd_disk -F -E lazy_itable_init=1,lazy_journal_init=1
  2017-05-15 18:32:46,820 - util.py[DEBUG]: Running command ['/sbin/mkfs.ext4', '/dev/sdc1', '-L', 'etcd_disk', '-F', '-E', 'lazy_itable_init=1,lazy_journal_init=1'] with allowed return codes [0] (shell=False, capture=True)
  2017-05-15 18:33:04,054 - util.py[DEBUG]: Creating fs for /dev/sdc1 took 17.237 seconds

  and after reboot (cloud-init.log)

  2017-05-16 01:52:40,245 - cc_disk_setup.py[DEBUG]: Creating file system etcd_disk on /dev/sdc1
  2017-05-16 01:52:40,246 - cc_disk_setup.py[DEBUG]:      Using cmd: /sbin/mkfs.ext4 /dev/sdc1 -L etcd_disk -F -E lazy_itable_init=1,lazy_journal_init=1
  2017-05-16 01:52:40,246 - util.py[DEBUG]: Running command ['/sbin/mkfs.ext4', '/dev/sdc1', '-L', 'etcd_disk', '-F', '-E', 'lazy_itable_init=1,lazy_journal_init=1'] with allowed return codes [0] (shell=False, capture=True)

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