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Adds the ovs 'config' property which returns the contents of the single row of the Open_vSwitch table. This gives access to certain OVS capabilities such as datapath_types and iface_types. Using this information in concert with the datapath_type config option, vif details are calculated by the OVS mech driver. If datapath_type == 'netdev' and OVS on the agent host is capable of supporting dpdkvhostuser, then it is used. Authored-By: Terry Wilson <twilson@redhat.com> Co-Authored-By: Sean Mooney <sean.k.mooney@intel.com> Closes-Bug: #1506127 Change-Id: I5047f1d1276e2f52ff02a0cba136e222779d059c
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2.4 KiB
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63 lines
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..
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Licensed under the Apache License, Version 2.0 (the "License"); you may
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not use this file except in compliance with the License. You may obtain
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a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations
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under the License.
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Convention for heading levels in Neutron devref:
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======= Heading 0 (reserved for the title in a document)
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------- Heading 1
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~~~~~~~ Heading 2
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+++++++ Heading 3
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''''''' Heading 4
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(Avoid deeper levels because they do not render well.)
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Neutron Open vSwitch vhost-user support
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=======================================
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Neutron supports using Open vSwitch + DPDK vhost-user interfaces directly in
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the OVS ML2 driver and agent. The current implementation relies on a multiple
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configuration values and includes runtime verification of Open vSwitch's
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capability to provide these interfaces.
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The OVS agent detects the capability of the underlying Open vSwitch
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installation and passes that information over RPC via the agent
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'configurations' dictionary. The ML2 driver uses this information to select
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the proper VIF type and binding details.
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Neutron+OVS+DPDK platform requirements
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--------------------------------------
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OVS 2.4.0+
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DPDK 2.0+
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Neutron OVS+DPDK vhost-user config
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----------------------------------
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[OVS]
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datapath_type=netdev
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vhostuser_socket_dir=/var/run/openvswitch
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When OVS is running with DPDK support enabled, and the datapath_type is set to
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"netdev", then the OVS ML2 driver will use the vhost-user VIF type and pass
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the necessary binding details to use OVS+DPDK and vhost-user sockets. This
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includes the vhoustuser_socket_dir setting, which must match the directory
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passed to ovs-vswitchd on startup.
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What about the networking-ovs-dpdk repo?
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----------------------------------------
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The networking-ovs-dpdk repo will continue to exist and undergo active
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development. This feature just removes the necessity for a separate ML2 driver
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and OVS agent in the networking-ovs-dpdk repo. The networking-ovs-dpdk project
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also provides a devstack plugin which also allows automated CI, a puppet
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module, and an OpenFlow-based security group implementation.
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