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[Launchpad Bug Tracker <1691772@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package cloud-init -
0.7.9-233-ge586fe35-0ubuntu1~17.04.1

---------------
cloud-init (0.7.9-233-ge586fe35-0ubuntu1~17.04.1) zesty; urgency=medium

  * debian/cloud-init.templates: enable Scaleway cloud.
  * debian/cloud-init.templates: enable Aliyun cloud.
  * drop the following cherry picks, now incorporated in snapshot.
    + debian/patches/cpick-5fb49bac-azure-identify-platform...
    + debian/patches/cpick-003c6678-net-remove-systemd-link...
    + debian/patches/cpick-1cd4323b-azure-remove-accidental...
    + debian/patches/cpick-ebc9ecbc-Azure-Add-network-config...
    + debian/patches/cpick-11121fe4-systemd-make-cloud-final...
  * debian/patches/stable-release-no-jsonschema-dep.patch:
    add patch to remove optional dependency on jsonschema.
  * New upstream snapshot.
    - cloudinit.net: add initialize_network_device function and tests
      [Chad Smith]
    - makefile: fix ci-deps-ubuntu target [Chad Smith]
    - tests: adjust locale integration test to parse default locale.
    - tests: remove 'yakkety' from releases as it is EOL.
    - centos: do not package systemd-fsck drop-in.
    - systemd: make systemd-fsck run after cloud-init.service (LP: #1691489)
    - tests: Add initial tests for EC2 and improve a docstring.
    - locale: Do not re-run locale-gen if provided locale is system default.
    - archlinux: fix set hostname usage of write_file. [Joshua Powers]
    - sysconfig: support subnet type of 'manual'.
    - tools/run-centos: make running with no argument show help.
    - Drop rand_str() usage in DNS redirection detection
      [Bob Aman] (LP: #1088611)
    - sysconfig: use MACADDR on bonds/bridges to configure mac_address
      [Ryan Harper]
    - net: eni route rendering missed ipv6 default route config
      [Ryan Harper] (LP: #1701097)
    - sysconfig: enable mtu set per subnet, including ipv6 mtu
      [Ryan Harper]
    - sysconfig: handle manual type subnets [Ryan Harper]
    - sysconfig: fix ipv6 gateway routes [Ryan Harper]
    - sysconfig: fix rendering of bond, bridge and vlan types.
      [Ryan Harper]
    - Templatize systemd unit files for cross distro deltas. [Ryan Harper]
    - sysconfig: ipv6 and default gateway fixes. [Ryan Harper]
    - net: fix renaming of nics to support mac addresses written in upper
      case. (LP: #1705147)
    - tests: fixes for issues uncovered when moving to python 3.6.
    - sysconfig: include GATEWAY value if set in subnet
      [Ryan Harper]
    - Scaleway: add datasource with user and vendor data for Scaleway.
      [Julien Castets]
    - Support comments in content read by load_shell_content.
    - cloudinitlocal fail to run during boot [Hongjiang Zhang]
    - doc: fix disk setup example table_type options [Sandor Zeestraten]
    - tools: Fix exception handling. [Joonas Kylmälä]
    - tests: fix usage of mock in GCE test.
    - test_gce: Fix invalid mock of platform_reports_gce to return False
      [Chad Smith]
    - test: fix incorrect keyid for apt repository.  [Joshua Powers]
    - tests: Update version of pylxd [Joshua Powers]
    - write_files: Remove log from helper function signatures.
      [Andrew Jorgensen]
    - doc: document the cmdline options to NoCloud [Brian Candler]
    - read_dmi_data: always return None when inside a container. (LP: #1701325)
    - requirements.txt: remove trailing white space.
    - Tests: Simplify the check on ssh-import-id [Joshua Powers]
    - tests: update ntp tests after sntp added [Joshua Powers]
    - FreeBSD: Make freebsd a variant, fix unittests and
      tools/build-on-freebsd.
    - FreeBSD: fix test failure
    - FreeBSD: replace ifdown/ifup with "ifconfig down" and "ifconfig up".
      [Hongjiang Zhang]
    - FreeBSD: fix cdrom mounting failure if /mnt/cdrom/secure did not exist.
      [Hongjiang Zhang]
    - main: Don't use templater to format the welcome message
      [Andrew Jorgensen]
    - docs: Automatically generate module docs form schema if present.
      [Chad Smith]
    - debian: fix path comment in /etc/hosts template. [Jens Sandmann]
    - suse: add hostname and fully qualified domain to template.
      [Jens Sandmann]
    - write_file(s): Print permissions as octal, not decimal [Andrew Jorgensen]
    - ci deps: Add --test-distro to read-dependencies to install all deps
      [Chad Smith]
    - tools/run-centos: cleanups and move to using read-dependencies
    - pkg build ci: Add make ci-deps-<distro> target to install pkgs
      [Chad Smith]
    - selinux: Allow restorecon to be non-fatal. [Ryan Harper]
    - net: Allow netinfo subprocesses to return 0 or 1 due to selinux.
      [Ryan Harper]
    - net: Allow for NetworkManager configuration [Ryan McCabe]
    - Use distro release version to determine if we use systemd in redhat spec
      [Ryan Harper]
    - net: normalize data in network_state object
    - Integration Testing: tox env, pyxld 2.2.3, and revamp framework
      [Wesley Wiedenmeier]
    - Chef: Update omnibus url to chef.io, minor doc changes. [JJ Asghar]
    - tools: add centos scripts to build and test [Joshua Powers]
    - Drop cheetah python module as it is not needed by trunk [Ryan Harper]
    - rhel/centos spec cleanups.
    - cloud.cfg: move to a template.  setup.py changes along the way.
    - Makefile: add deb-src and srpm targets. use PYVER more places.
    - makefile: fix python 2/3 detection in the Makefile [Chad Smith]
    - snap: Removing snapcraft plug line [Joshua Powers]
    - RHEL/CentOS: Fix default routes for IPv4/IPv6 configuration.
      [Andreas Karis]
    - test: Fix pyflakes complaint of unused import. [Joshua Powers]
    - NoCloud: support seed of nocloud from smbios information
      [Vladimir Pouzanov] (LP: #1691772)
    - net: when selecting a network device, use natural sort order
      [Marc-Aurèle Brothier]
    - fix typos and remove whitespace in various docs [Stephan Telling]
    - systemd: Fix typo in comment in cloud-init.target. [Chen-Han Hsiao]
    - Tests: Skip jsonschema related unit tests when dependency is absent.
      [Chad Smith]
    - tools/net-convert.py: support old cloudinit versions by using kwargs.
    - ntp: Add schema definition and passive schema validation.
      [Chad Smith] (LP: #1692916)
    - Fix eni rendering for bridge params that require repeated key for
      values. [Ryan Harper] (LP: #1706752)
    - AliYun: Enable platform identification and enable by default.
      [Junjie Wang] (LP: #1638931)

 -- Scott Moser <smoser@xxxxxxxxxx>  Mon, 31 Jul 2017 16:33:24 -0400

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

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https://bugs.launchpad.net/bugs/1691772

Title:
  provide a way to seed NoCloud from network without image modification.

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 Zesty:
  Fix Released

Bug description:
  === Begin SRU Template ===
  [Impact]
  In bug 1660385, we made imitating the EC2 datasource more difficult.
  By design, that broke some users or platforms who have done so in the past.

  The change here gives users who were using the Ubuntu images in a low-tech
  "No Cloud" fashion an easier way to regain that functionality.

  The solution was to read the 'system-serial-number' field in DMI data and
  consider it as as input to the nocloud datasource in a similar way to
  what we had done in the past with the kernel command line.

  [Test Case]
  a.) download a cloud image, update its cloud-init

     # see below for 'get-proposed-cloudimg'
     $ release=xenial
     $ get-proposed-cloudimg $release

  b.) boot that image with command line pointing at a 'seed'

     $ img=${release}-server-cloudimg-amd64-proposed.img
     # url has to provide '<url>/user-data' and '<url>/meta-data'
     $ url=https://git.launchpad.net/~smoser/cloud-init/+git/sru-info/plain/bugs/lp-1691772/
     $ qemu-system-x86_64 -snapshot -enable-kvm -m 512 \
        -device virtio-net-pci,netdev=net00 -netdev type=user,id=net00 \
        -drive "file=$img,if=virtio" \
        -smbios "type=1,serial=ds=nocloud-net;seedfrom=$url" \
        -nographic

     # note,  you can hit 'ctrl-a c' to toggle between the qemu monitor
     # and the serial console in '-nographic' mode.

  c.) Log in with 'ubuntu:passw0rd' and check hostname.
     If the above url was correctly used, then:
       * you can log in with 'ubuntu:passw0rd'
       * the hostname will be set to 'nocloud-guest'
       * /run/cloud-init/result.json will show that the url has been used.

     ubuntu@nocloud-guest:~$ hostname
     nocloud-guest
     ubuntu@nocloud-guest$ cat /run/cloud-init/result.json
     {
      "v1": {
       "datasource": "DataSourceNoCloudNet [seed=dmi,https://git.launchpad.net/~smoser/cloud-init/+git/sru-info/plain/bugs/lp-1691772/][dsmode=net]";,
       "errors": []
      }
     }

  [Regression Potential]
  The code attempts to parse the 'system-serial-number' entry in dmi data as a
  string with data in it.  If that field had the string 'ds=nocloud' that was
  not intended as consumable for cloud-init, a false positive could occur and
  an exception cause the NoCloud datasource to not read data from another
  location.

  This seems somewhat unlikely and other paths should result in simply no
  new action being taken.

  [Other Info]
  Upstream commit at
    https://git.launchpad.net/cloud-init/commit/?id=802e7cb2da8

  get-proposed-cloudimg is available at [1], it basically downloads an
  ubuntu cloud image, enables -proposed and upgrade/installs cloud-init.

  --
  [1] https://git.launchpad.net/~smoser/cloud-init/+git/sru-info/tree/bin/get-proposed-cloudimg

  === End SRU Template ===

  
  Vladimir suggested this in bug 1660385 comment 12 [1].
  The idea would be to have a supported way that you could seed images with cloud-init using Nocloud without any tinkering in the image.  That would mean
   a.) no second block device
   b.) no usage of kernel command line.

  --
  [1] https://bugs.launchpad.net/cloud-init/+bug/1660385/comments/12

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