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[themadengin33r <themadengin33r@xxxxxxxxx>]

Public bug reported:

Using icehouse on ubuntu 12.04 with multiple compute nodes in  multiple
AZ.

On one of the AZ there is only one compute node!!.

When tried to create instance on that AZ  because of high CPU usage on
that compute node ovs failed (can be because of different reason but ovs
was not running) and on horizon it returned "No valid host" error ,so i
terminated that instance using horizon ,but on compute node linux bridge
created for that instance is still there with its corresponding veth
pairs.

qbrdc9ab313-bf          8000.6e8c6790ebaa       no
qvbdc9ab313-bf

and

ethtool -S qvbdc9ab313-bf
NIC statistics:
     peer_ifindex: 16

ip a |grep 16

16: qvodc9ab313-bf: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500
qdisc pfifo_fast state UP qlen 100

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1401060

Title:
  Linux Bridge not getting removed,if ovs is not running and if we
  terminate failed instance

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  Using icehouse on ubuntu 12.04 with multiple compute nodes in
  multiple AZ.

  On one of the AZ there is only one compute node!!.

  When tried to create instance on that AZ  because of high CPU usage on
  that compute node ovs failed (can be because of different reason but
  ovs was not running) and on horizon it returned "No valid host" error
  ,so i terminated that instance using horizon ,but on compute node
  linux bridge created for that instance is still there with its
  corresponding veth pairs.

  qbrdc9ab313-bf          8000.6e8c6790ebaa       no
  qvbdc9ab313-bf

  and

  ethtool -S qvbdc9ab313-bf
  NIC statistics:
       peer_ifindex: 16

  ip a |grep 16

  16: qvodc9ab313-bf: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500
  qdisc pfifo_fast state UP qlen 100

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