** Changed in: nova
Status: Fix Committed => Fix Released
** Changed in: nova
Milestone: None => juno-rc1
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https://bugs.launchpad.net/bugs/1359510
Title:
Network deallocation can fail with use_single_default_gateway
Status in OpenStack Compute (Nova):
Fix Released
Bug description:
There is a race condition in linux_net.get_dhcp_opts when
use_single_default_gateway is set. Because it makes multiple queries,
if an instance is deleted while iterating through the list of fixed
ips, it can cause an exception like the following:
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/nova/network/linux_net.py", line 1043, in
update_dhcp
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher
restart_dhcp(context, dev, network_ref)
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/nova/openstack/common/lockutils.py", line
249, in inner
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher return
f(*args, **kwargs)
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/nova/network/linux_net.py", line 1096, in
restart_dhcp
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher
write_to_file(optsfile, get_dhcp_opts(context, network_ref))
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/nova/network/linux_net.py", line 1016, in
get_dhcp_opts
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher
context, instance_uuid)
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/nova/objects/base.py", line 110, in wrapper
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher args,
kwargs)
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/nova/conductor/rpcapi.py", line 425, in
object_class_action
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher
objver=objver, args=args, kwargs=kwargs)
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/oslo/messaging/rpc/client.py", line 150, in
call
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher
wait_for_reply=True, timeout=timeout)
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/oslo/messaging/transport.py", line 90, in
_send
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher
timeout=timeout)
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line
412, in send
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher return
self._send(target, ctxt, message, wait_for_reply, timeout)
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher File
"/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/amqpdriver.py", line
405, in _send
2014-08-20 19:44:31.371 10867 TRACE oslo.messaging.rpc.dispatcher raise
result
While the query could be fixed to catch the exception, this code is
also horribly inefficient, so the logic needs to be fixed to only make
one db query.
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