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[Scott Moser <smoser@xxxxxxxxxx>]

This bug is believed to be fixed in cloud-init in 17.1. 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/1669504

Title:
  net/sysconfig.py is broken with ipv4 + ipv6 interfaces

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

Bug description:
  === Begin SRU Template ===
  [Impact] 
  This code path is not applicable to Ubuntu.
  The bug was in supporting dual stack network configuration in
  sysconfig (Redhat/centos) format.
     
  [Test Case]
  Launch an instance on lxd, make sure it has network.
   
  [Regression Potential] 
  Changes to network rendering could have negatively affected Ubuntu
  the test above is valid to check that that didn't go horribly wrong.
     
  [Other Info]
  Upstream commit:
   https://git.launchpad.net/cloud-init/commit/?id=1d751a6f46
     
  === End SRU Template ===

  
  Given a network configuration that includes ipv4 and ipv6 configuration for an interface, as in:

     "networks": [
        {
           "id": "public-ipv6",
           "ip_address": "2604:A880:0400:00D0:0000:0000:1714:F001/64",
           "link": "interface-public",
           "netmask": "",
           "neutron_network_id": "937c94de-7029-586e-6e36-ea9af2d815de",
           "type": "ipv6",
           "routes": [
              {
                 "gateway": "2604:A880:0400:00D0:0000:0000:0000:0001",
                 "netmask": "::",
                 "network": "::"
              }
           ]
        },
        {
           "id": "public-ipv4",
           "ip_address": "198.199.75.198",
           "link": "interface-public",
           "netmask": "255.255.255.0",
           "neutron_network_id": "7d9cd798-2dc0-502f-41ca-e04b552ddffd",
           "type": "ipv4",
           "routes": [
              {
                 "gateway": "198.199.75.1",
                 "netmask": "0.0.0.0",
                 "network": "0.0.0.0"
              }
           ]
        }
      ]

  cloud-init will fail because both subnets provide a default route,
  resulting in the error:

      Duplicate declaration of default route found for interface eth0

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