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[Chad Smith <1752391@xxxxxxxxxxxxxxxxxx>]

This bug is believed to be fixed in cloud-init in 18.2. If this is still
a problem for you, please make a comment and set the state back to New

Thank you.

** Changed in: cloud-init
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1752391

Title:
  cloud-init does not recognize initramfs provided network config in all
  cases

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

Bug description:
  Cloud-init relies on the 'ip=' or 'ip6=' parameter to be present in the
  kernel command line in order to consider /run/net-*.conf files.  Those files
  are written by the initramfs indicating that network is was configured.

  When 'ip=' or 'ip6=' is found on the command line, cloud-init will consider
  that to be "kernel command line provided" network, and renders a network
  configuration like:
    # control-manual ens3
    iface ens3 inet dhcp
        broadcast 10.0.3.255
        dns-nameservers 169.254.169.254
        gateway 10.0.3.1

  The key there being that it is not marked 'auto'.  If cloud-init does
  not recognize this, it will render:
    auto ens3
    iface ens3 inet dhcp

  There are some iscsi-root where initramfs configures networking
  but the ip= parameter is not present.  2 such cases are:
   a.) static config in /etc/iscsi/iscsi.initramfs (copied into the initramfs)
   b.) iBft

  If the devices are marked 'auto', then 'networking.service' takes
  the device down during shutdown.  That causes any filesystem activity
  to hang and block shutdown/reboot.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: cloud-init 17.1-46-g7acc9e68-0ubuntu1~16.04.1 [modified: usr/lib/python3/dist-packages/cloudinit/net/cmdline.py usr/lib/python3/dist-packages/cloudinit/sources/helpers/openstack.py]
  ProcVersionSignature: Ubuntu 4.4.0-108.131-generic 4.4.98
  Uname: Linux 4.4.0-108-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  CloudName: OpenStack
  Date: Wed Feb 28 18:35:50 2018
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: cloud-init
  UpgradeStatus: No upgrade log present (probably fresh install)

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