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

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

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https://bugs.launchpad.net/bugs/1226425

Title:
  Problem specifying VMware network name in FlatNetworking

Status in OpenStack Compute (nova):
  Opinion

Bug description:
  Unable to use an existing network (port group) on an ESX host if the
  network's name is not a valid Linux bridge identifier.

  2013-09-17 06:02:47.365 TRACE nova.openstack.common.rpc.amqp
  ^[[01;35m^[[00m[u'Traceback (most recent call last):\n', u'  File
  "/opt/stack/nova/nova/openstack/common/rpc/amqp.py", line 421, in
  _process_data\n    **args)\n', u'  File
  "/opt/stack/nova/nova/openstack/common/rpc/dispatcher.py", line 172,
  in dispatch\n    result = getattr(proxyobj, method)(ctxt,
  **kwargs)\n', u'  File "/opt/stack/nova/nova/network/floating_ips.py",
  line 189, in deallocate_for_instance\n    super(FloatingIP,
  self).deallocate_for_instance(context, **kwargs)\n', u'  File
  "/opt/stack/nova/nova/network/manager.py", line 530, in
  deallocate_for_instance\n    self.deallocate_fixed_ip(context,
  fixed_ip[\'address\'], host=host)\n', u'  File
  "/opt/stack/nova/nova/network/manager.py", line 237, in
  deallocate_fixed_ip\n    address)\n', u'  File
  "/opt/stack/nova/nova/network/manager.py", line 918, in
  deallocate_fixed_ip\n    self._teardown_network_on_host(context,
  network)\n', u'  File "/opt/stack/nova/nova/network/manager.py", line
  1629, in _teardown_network_on_host\n
  self.driver.update_dhcp(elevated, dev, network)\n', u'  File
  "/opt/stack/nova/nova/network/linux_net.py", line 981, in
  update_dhcp\n    restart_dhcp(context, dev, network_ref)\n', u'  File
  "/opt/stack/nova/nova/openstack/common/lockutils.py", line 246, in
  inner\n    return f(*args, **kwargs)\n', u'  File
  "/opt/stack/nova/nova/network/linux_net.py", line 1098, in
  restart_dhcp\n    _add_dnsmasq_accept_rules(dev)\n', u'  File
  "/opt/stack/nova/nova/network/linux_net.py", line 910, in
  _add_dnsmasq_accept_rules\n    iptables_manager.apply()\n', u'  File
  "/opt/stack/nova/nova/network/linux_net.py", line 421, in apply\n
  self._apply()\n', u'  File
  "/opt/stack/nova/nova/openstack/common/lockutils.py", line 246, in
  inner\n    return f(*args, **kwargs)\n', u'  File
  "/opt/stack/nova/nova/network/linux_net.py", line 450, in _apply\n
  attempts=5)\n', u'  File "/opt/stack/nova/nova/network/linux_net.py",
  line 1189, in _execute\n    return utils.execute(*cmd, **kwargs)\n',
  u'  File "/opt/stack/nova/nova/utils.py", line 167, in execute\n
  return processutils.execute(*cmd, **kwargs)\n', u'  File
  "/opt/stack/nova/nova/openstack/common/processutils.py", line 178, in
  execute\n    cmd=\' \'.join(cmd))\n', u'ProcessExecutionError:
  Unexpected error while running command.\nCommand: sudo nova-rootwrap
  /etc/nova/rootwrap.conf iptables-restore -c\nExit code: 2\nStdout:
  \'\'\nStderr: "Bad argument `Network\'\\nError occurred at line:
  21\\nTry `iptables-restore -h\' or \'iptables-restore --help\' for
  more information.\\n"\n']

  Triage Info :-
  With flat networking and VMware driver, the config parameter flat_network_bridge is associated with the port group on the ESX host. This parameter is used to create a port group or to find an existing port group. This is also used as the name of the bridge containing the flat interface.

  Eg. If there exists a network named 'VM Network' on a vswitch
  associated with a host in vCenter, you cannot specify the same in
  flat_network_bridge because a linux bridge cannot take this name.

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