x/vmware-nsx
Code Issues Proposed changes

BigSwitch: Don't import portbindings_db until use

Browse Source 
The Big Switch ML2 driver re-uses large parts of
code from the Big Switch plugin. However, the plugin
uses the old portbindings_db in its port tracking
code. This db is not created/used by ML2, so it does
not exist when the Big Switch ML2 driver is being used.
This caused a problem when the portbindings_db module
would be imported even though it wasn't being used
since the SQLAlchemy models would create the
relationships during the import.

This patch moves the portbindings_db import down to
the methods that leverage it so it won't be imported
during use by the ML2 driver.

This is a temporary solution which can be back-ported
if disabling auto schema generation is back-ported
to icehouse. An appropriate fix will require some
refactoring to avoid the port tracking code from
being imported for ML2.

Closes-Bug: #1300628
Change-Id: I551abf9d6ec832c423cba0d50bb27715b43c0b1c
This commit is contained in:
Kevin Benton 2014-04-03 10:00:37 +00:00
parent 9e7bfac63b
commit 1997cc97f1
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
neutron/plugins/bigswitch/db/porttracker_db.py
View File

@ -16,13 +16,15 @@
# under the License.
from neutron.api.v2 import attributes
from neutron.db import portbindings_db
from neutron.openstack.common import log as logging
LOG = logging.getLogger(__name__)
def get_port_hostid(context, port_id):
# REVISIT(kevinbenton): this is a workaround to avoid portbindings_db
# relational table generation until one of the functions is called.
from neutron.db import portbindings_db
with context.session.begin(subtransactions=True):
query = context.session.query(portbindings_db.PortBindingPort)
res = query.filter_by(port_id=port_id).first()
@ -32,6 +34,9 @@ def get_port_hostid(context, port_id):
def put_port_hostid(context, port_id, host):
# REVISIT(kevinbenton): this is a workaround to avoid portbindings_db
# relational table generation until one of the functions is called.
from neutron.db import portbindings_db
if not attributes.is_attr_set(host):
LOG.warning(_("No host_id in port request to track port location."))
return