3f25cd3245
When OVS is restarted, by default it will not reprogram flows which were programmed. For the case of the OVS agent, this means a restart will cause all traffic to be switched using the NORMAL action. This is undesirable for a number of reasons, including obvious security reasons. This change provides a way for the agent to check if a restart of ovs-vswitchd has happened in the main agent loop. If a restart of ovs-vswitchd is detected, the agent will run through the setup of the bridges on the host and reprogram flows for all the ports connected. DocImpact This changes adds a new table (table 23) to the integration bridge, with a single 'drop' flow. This is used to monitor OVS restarts and to reprogram flows from the agent. Change-Id: If9e07465c43115838de23e12a4e0087c9218cea2 Closes-Bug: #1290486
58 lines
1.7 KiB
Python
58 lines
1.7 KiB
Python
# Copyright (c) 2012 OpenStack Foundation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from neutron.plugins.common import constants as p_const
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# Special vlan_id value in ovs_vlan_allocations table indicating flat network
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FLAT_VLAN_ID = -1
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# Topic for tunnel notifications between the plugin and agent
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TUNNEL = 'tunnel'
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# Values for network_type
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VXLAN_UDP_PORT = 4789
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# Name prefixes for veth device pair linking the integration bridge
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# with the physical bridge for a physical network
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VETH_INTEGRATION_PREFIX = 'int-'
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VETH_PHYSICAL_PREFIX = 'phy-'
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# The minimum version of OVS which supports VXLAN tunneling
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MINIMUM_OVS_VXLAN_VERSION = "1.10"
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# The first version of the Linux kernel with converged VXLAN code for OVS
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MINIMUM_LINUX_KERNEL_OVS_VXLAN = "3.13.0"
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# The different types of tunnels
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TUNNEL_NETWORK_TYPES = [p_const.TYPE_GRE, p_const.TYPE_VXLAN]
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# Various tables for tunneling flows
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PATCH_LV_TO_TUN = 1
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GRE_TUN_TO_LV = 2
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VXLAN_TUN_TO_LV = 3
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LEARN_FROM_TUN = 10
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UCAST_TO_TUN = 20
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ARP_RESPONDER = 21
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FLOOD_TO_TUN = 22
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CANARY_TABLE = 23
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# Map tunnel types to tables number
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TUN_TABLE = {p_const.TYPE_GRE: GRE_TUN_TO_LV,
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p_const.TYPE_VXLAN: VXLAN_TUN_TO_LV}
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# The default respawn interval for the ovsdb monitor
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DEFAULT_OVSDBMON_RESPAWN = 30
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