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[Launchpad Bug Tracker <1675576@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package cloud-init - 0.7.9-87-gd23543eb-
0ubuntu1

---------------
cloud-init (0.7.9-87-gd23543eb-0ubuntu1) zesty; urgency=medium

  * debian/cloud-init.templates: add Bigstep to list of sources. (LP: #1676460)
  * New upstream snapshot.
    - net: in netplan renderer delete known image-builtin content.
      (LP: #1675576)
    - doc: correct grammar in capabilities.rst [David Tagatac]
    - ds-identify: fix detecting of maas datasource. (LP: #1677710)
    - netplan: remove debugging prints, add debug logging [Ryan Harper]
    - ds-identify: do not write None twice to datasource_list.
    - support resizing partition and rootfs on system booted without initramfs.
      (LP: #1677376) [Steve Langasek]
    - apt_configure: run only when needed. (LP: #1675185)
    - OpenStack: identify OpenStack by product 'OpenStack Compute'.
      (LP: #1675349)
    - GCE: Search GCE in ds-identify, consider serial number in check.
      (LP: #1674861)
    - Add support for setting hashed passwords [Tore S. Lonoy] (LP: #1570325)

 -- Scott Moser <smoser@xxxxxxxxxx>  Thu, 30 Mar 2017 16:46:43 -0400

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

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https://bugs.launchpad.net/bugs/1675576

Title:
  cloud-init netplan renderer might need to delete baked in
  configuration

Status in cloud-init:
  Confirmed
Status in cloud-init package in Ubuntu:
  Fix Released

Bug description:
  1. Zesty
  2. 0.7.9-68-gef18b8ac-0ubuntu1
  3. cloud-init with network configuration rendering to netplan config has exclusive control over networkd configuration
  4. On images with existing netplan configuration (UC16 has an /etc/netplan/00-snapd-config.yaml); netplan generator will parse and write out networkd config to /run/systemd/network/10-netplan-*
  These files may collide with network-configuration provided to cloud-init which has been configured to render netplan.

  cloud-init should employ a 'maybe-delete' like function in the eni
  renderer to

  a) remove /etc/netplan/00-snapd-config.yaml  # this is the only known content at this time
  b) remove /run/systemd/network/10-netplan*   # files generated from (a)
  c) remove /run/systemd/generator/netplan.stamp # prevents new invocations of netplan generate

  Once these are removed, cloud-init netplan renderer may write out
  netplan config, and invoke netplan generate successfully.

  raharper@localhost:~$ find /etc/netplan /run/systemd/network
  /etc/netplan
  /etc/netplan/00-snapd-config.yaml
  /run/systemd/network
  /run/systemd/network/10-netplan-all-en.network
  /run/systemd/network/10-netplan-all-eth.network
  raharper@localhost:~$ ls -al /run/systemd/generator/netplan.stamp
  -rw-r--r-- 1 root root 0 Mar 23 21:58 /run/systemd/generator/netplan.stamp

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