This feature is related with nova-neutron interaction.
If nova calls neutron restful api, it is difficult to append 'bridge-to-
be-attached' info into api response. For example, a parameter called
'physical bridge' may be added to Port object in neutron or Port-binding
dict.
However, if nova calls neutron rpc, it is easy to append any info to
nova.
** Also affects: nova
Importance: Undecided
Status: New
** Changed in: nova
Assignee: (unassigned) => Li Ma (nick-ma-z)
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https://bugs.launchpad.net/bugs/1105488
Title:
linuxbridge agent needs ability to use pre-configured physical network
bridges (nova-related)
Status in neutron:
Triaged
Status in OpenStack Compute (nova):
New
Bug description:
The linuxbridge agent currently creates a bridge for each physical
network used as a flat network, moving any existing IP address from
the interface to the newly created bridge. This is very helpful in
some cases, but there are other cases where the ability to use a pre-
existing bridge is needed. For instance, the same physical network
might need to be bridged for other purposes, or the agent moving the
system's IP might not be desired.
I suggest we add a physical_bridge_mappings configuration variable,
similar to that used by the openvswitch agent, alongside the current
physical_interface_mappings variable. When a bridge for a flat network
is needed, the bridge mappings would be checked first. If a bridge
mapping for the physical network exists, it would be used. If not, the
interface mapping would be used and a bridge for the interface would
be created automatically. Sub-interfaces and bridges for VLAN networks
would continue to work as they do now, created by the agent using the
interface mappings.
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