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[Scott Moser <smoser@xxxxxxxxxx>]

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

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

** Changed in: cloud-init (Ubuntu Xenial)
       Status: New => Confirmed

** Changed in: cloud-init (Ubuntu Yakkety)
       Status: New => Confirmed

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

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

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

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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