[Bug 1734167] Re: DNS doesn't work in no-cloud as launched by ubuntu

[Scott Moser]

I think the primary issue is that cloud-init.service is depending on using the network fully.
cloud-init.service runs:
  After=networking.service
  After=systemd-networkd-wait-online.service
  Before=network-online.target

But systemd-resolved.service runs
 After=systemd-networkd.service network.target
 Before=network-online.target nss-lookup.target


I tried adding to cloud-init.service.
 After=systemd-resolved.service
but that did not help things.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1734167

Title:
  DNS doesn't work in no-cloud as launched by ubuntu

Status in cloud-init:
  Confirmed
Status in cloud-init package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Confirmed
Status in cloud-init source package in Zesty:
  New
Status in systemd source package in Zesty:
  New
Status in cloud-init source package in Artful:
  New
Status in systemd source package in Artful:
  New
Status in cloud-init source package in Bionic:
  Confirmed
Status in systemd source package in Bionic:
  Confirmed

Bug description:
  I use no-cloud to test the kernel in CI (I am maintainer of the bcache
  subsystem), and have been running it successfully under 16.04 cloud
  images from qemu, using a qemu command that includes:

  -smbios "type=1,serial=ds=nocloud-
  net;s=https://raw.githubusercontent.com/mlyle/mlyle/master/cloud-
  metadata/linuxtst/"

  As documented here:

  http://cloudinit.readthedocs.io/en/latest/topics/datasources/nocloud.html

  Under the new 17.10 cloud images, this doesn't work: the network comes
  up, but name resolution doesn't work-- /etc/resolv.conf is a symlink
  to a nonexistent file at this point of the boot and systemd-resolved
  is not running.  When I manually hack /etc/resolv.conf in the cloud
  image to point to 4.2.2.1 it works fine.

  I don't know if nameservice not working is by design, but it seems
  like it should work.  The documentation states:

  "With ds=nocloud-net, the seedfrom value must start with http://,
  https:// or ftp://"

  And https is not going to work for a raw IP address.

To manage notifications about this bug go to:
https://bugs.launchpad.net/cloud-init/+bug/1734167/+subscriptions