Merge "Create _mech_context before delete to avoid race"
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commit
a190ca6b65
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@ -1200,7 +1200,11 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
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# called inside of a transaction.
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return super(Ml2Plugin, self).delete_network(context, id)
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@registry.receives(resources.NETWORK, [events.PRECOMMIT_DELETE])
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# NOTE(mgoddard): Use a priority of zero to ensure this handler runs before
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# other precommit handlers. This is necessary to ensure we avoid another
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# handler deleting a subresource of the network, e.g. segments.
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@registry.receives(resources.NETWORK, [events.PRECOMMIT_DELETE],
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priority=0)
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def _network_delete_precommit_handler(self, rtype, event, trigger,
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context, network_id, **kwargs):
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network = self.get_network(context, network_id)
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@ -1311,7 +1315,10 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
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# called inside of a transaction.
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return super(Ml2Plugin, self).delete_subnet(context, id)
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@registry.receives(resources.SUBNET, [events.PRECOMMIT_DELETE])
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# NOTE(mgoddard): Use a priority of zero to ensure this handler runs before
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# other precommit handlers. This is necessary to ensure we avoid another
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# handler deleting a subresource of the subnet.
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@registry.receives(resources.SUBNET, [events.PRECOMMIT_DELETE], priority=0)
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def _subnet_delete_precommit_handler(self, rtype, event, trigger,
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context, subnet_id, **kwargs):
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subnet_obj = self._get_subnet_object(context, subnet_id)
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@ -0,0 +1,9 @@
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---
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fixes:
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- |
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Fixes an issue where deletion of a provider network could result in ML2
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mechanism drivers not being passed information about the network's provider
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fields. The consequences of this depend on the mechanism driver in use, but
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could result in the event being ignored, leading to an incorrectly
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configured network. See `bug 1841967
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<https://bugs.launchpad.net/neutron/+bug/1841967>`__ for details.
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