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[Launchpad Bug Tracker <1832042@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package initramfs-tools - 0.133ubuntu5

---------------
initramfs-tools (0.133ubuntu5) eoan; urgency=medium

  * Correctly serialize previously absent static ip configuration
    (declared as protocol 'none' by ipconfig) into runtime netplan
    yaml. LP: #1832042
  * Adjust testsuite sample file to match reality
  * Set executable bit on resume script in local-premount

 -- Dimitri John Ledkov <xnox@xxxxxxxxxx>  Fri, 07 Jun 2019 21:56:33
+0100

** Changed in: initramfs-tools (Ubuntu Eoan)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1832042

Title:
  static ip= address configuration does not end up in netplan file

Status in initramfs-tools package in Ubuntu:
  Fix Released
Status in initramfs-tools source package in Xenial:
  New
Status in initramfs-tools source package in Bionic:
  New
Status in initramfs-tools source package in Cosmic:
  New
Status in initramfs-tools source package in Disco:
  New
Status in initramfs-tools source package in Eoan:
  Fix Released

Bug description:
  static ip= address configuration does not end up in netplan file

  klibc ipconfig process ip=...:$proto and dumps the state into a file,
  which is then parsed to generate runtime netplan configs.

  For static ip configuration ipconfig parses $proto values "off" "none"
  "static" as the same PROTO_NONE and encodes it as PROTO="none" in the
  serialized state file.

  The function that dumps ip data (_declare_ip_info()) has keys only
  values for dhcp dhcp4 dhcp6 static. But not "none" (used by ipconfig)
  or "off" (as valid by the kernel).

  This means that netplan files generated in /run for static ip
  configuration are incomplete.

  Imho we should accept "off" "none" "static" as all valid PROTO
  settings for static ip configuration.

  [Impact]

   * `netplan apply` will not reapply static ip configuration as
  declared in ip= kernel cmdline.

  [Test Case]

   * boot with static ip configuration in the kernel cmdline, e.g.

    ip=10.245.232.12::10.245.232.1:255.255.255.255:clound01:enc603:none

    Check that /run/netplan/*.yaml contains addresses stanzas.

  [Regression Potential]

   * Runtime netplan configuration will now be more complete. Meaning
  that static ip addresses will now persist across `netplan apply` /
  downing, and reupping an interface. Whilst it was intended for static
  ip addresses to be there, it might be unexpected that they actually
  work properly now.

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