[Bug 1750851] Re: re-add cloud-initramfs-dyn-netconf to ubuntu-server

[Launchpad Bug Tracker]

** Branch linked: lp:~ubuntu-core-dev/ubuntu-seeds/ubuntu.bionic

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Title:
  re-add cloud-initramfs-dyn-netconf to ubuntu-server

Status in ubuntu-meta package in Ubuntu:
  New

Bug description:
  I (smoser) removed cloud-initramfs-dyn-netconf from ubuntu-server meta
  package.  That package provides functionality needed by MAAS and cause bug
  1748875.  Under that bug we re-added cloud-initramfs-dyn-netconf to the
  initramfs that MAAS publishes.

  We subsequently saw failure in open-iscsi tests, which utilize that same
  function.

  My commit message to the fix of maas-images is below for informational
  purposes [1]:
    [1] https://code.launchpad.net/~smoser/maas-images/trunk.lp1749019-re-add-cloud-intramfs-dyn-netconf/+merge/337605

  'b' is *also* used by the open-iscsi use case.  It boots with a slightly
  different form than maas images:
    BOOTIF_DEFAULT=eth0 and ip=:::::name:BOOTIF

  Here, 'BOOTIF' will be replaced with 'eth0'.

  | Re-add cloud-initramfs-dyn-netconf. Needed by maas for BOOTIF in ip=.
  |
  | The previous commit to trunk dropped cloud-initramfs-dyn-netconf from
  | the maas image in releases newer than xenial.
  | 
  | That caused errors in MAAS. cloud-initramfs-dyn-netconf does 2 things:
  | a.) writes /run/network/dynamic-interfaces
  |     this is a ENI style file with data retrived from ipconfig
  | b.) convert 'BOOTIF' string in the value of IP
  |   Example:
  |     ip=::::foobar:BOOTIF BOOTIF=01-00-22-68-10-c1-e6
  |   will be effectively rendered as:
  |     ip=::::foobar:eth0
  |
  | 'b' is still required by maas.
  |
  | Note: in maas v3 images, the squashfs image is re-used pristine
  | from cloud-images. Because of this, the installation into the image
  | affects initramfs creation, but does not affect the image. That is
  | correct in that this package is not needed in the image but only
  | in the initramfs.

  Related bugs:
   * bug 1748875:  Unable to deploy Bionic on bare-metals with MaaS 2.3.0

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