[Bug 1590689] Re: MAAS 1.9.3 + Juju 1.25.5 - on the Juju controller node eth0 and juju-br0 interfaces have the same IP address at the same time

[Canonical Juju QA Bot]

** Project changed: juju-core => juju

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Title:
  MAAS 1.9.3 + Juju 1.25.5 - on the Juju controller node eth0 and juju-
  br0 interfaces have the same IP address at the same time

Status in juju:
  Won't Fix
Status in juju-core 1.25 series:
  Won't Fix
Status in MAAS:
  Confirmed
Status in ifenslave package in Ubuntu:
  Confirmed

Bug description:
  Running MAAS 1.9.3 - Juju 1.25.5 - Ubuntu 14.04.04

  After a Juju bootstrap the Juju controller node remains with both the
  eth0 and the juju-br0 interfaces set at the same time and with the
  same IP.

  eth0 is defined in ENI as manual but also in interfaces.d/eth0.cfg as
  DHCP

  juju-br0 is defined in ENI as static and with the same eth0 IP

  It seems Juju rewrites /etc/network/interfaces, but doesn't
  remove/change /etc/network/interfaces.d/eth0.cfg. This results in one
  interface defined twice.

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