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["Markus Zoeller \(markus_z\)" <mzoeller@xxxxxxxxxxxxxxxxxx>]

This is an automated cleanup. This bug report has been closed because it
is older than 18 months and there is no open code change to fix this.
After this time it is unlikely that the circumstances which lead to
the observed issue can be reproduced.

If you can reproduce the bug, please:
* reopen the bug report (set to status "New")
* AND add the detailed steps to reproduce the issue (if applicable)
* AND leave a comment "CONFIRMED FOR: <RELEASE_NAME>"
  Only still supported release names are valid (LIBERTY, MITAKA, OCATA, NEWTON).
  Valid example: CONFIRMED FOR: LIBERTY


** Changed in: nova
       Status: Confirmed => Expired

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https://bugs.launchpad.net/bugs/1179443

Title:
  Route on public_interface gets lost when using nova-network

Status in OpenStack Compute (nova):
  Expired

Bug description:
  Environment: Ubuntu 12.04.2 LTS, Folsom packages

  When utilising nova-network on a public_interface that has no IP
  Address assigned on the compute node, the route defined on the
  interface is lost whenever the last floating IP is removed from the
  interface.

  To replicate the issue, define the public_interface as a manual
  interface with the public network and default route applied as post-up
  commands. On ubuntu it would be in /etc/network/interfaces, something
  like this:

  auto eth0
  iface eth0 inet manual
    post-up route add -net xxx.yyy.zzz.0/23 eth0
    post-up route add default gw xxx.yyy.zzz.1 eth0

  Then in /etc/nova/nova.conf there would be the line:

  public_interface=eth0

  When adding a floating IP to this interface, an ip address is added to
  the interface using 'ip addr add' by a combination of the following
  two files (on Ubuntu):

  /usr/share/pyshared/nova/network/l3.py
  /usr/share/pyshared/nova/network/linux_net.py

  When the floating IP is removed from the interface, the same two files
  process the removal using 'ip addr del' and in doing so also result in
  the loss of the network and default routes. This can be replicated by
  simply adding an ip address on that interface using 'ip addr add',
  then 'ip addr del' for the same IP - the issuing 'route -n' or 'ip
  route' to confirm the route's demise.

  In our environment where we are not allocating a public IP address to
  the compute host this results in the loss of connectivity for any
  instances with a floating IP as the default route is lost.

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