Jian Li | 1b08d65 | 2019-05-02 17:28:09 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019-present Open Networking Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.k8snetworking.impl; |
| 17 | |
| 18 | import org.onlab.packet.ARP; |
| 19 | import org.onlab.packet.Ethernet; |
| 20 | import org.onlab.packet.Ip4Address; |
| 21 | import org.onlab.packet.IpAddress; |
| 22 | import org.onlab.packet.MacAddress; |
| 23 | import org.onlab.packet.VlanId; |
| 24 | import org.onosproject.cluster.ClusterService; |
| 25 | import org.onosproject.cluster.LeadershipService; |
| 26 | import org.onosproject.cluster.NodeId; |
| 27 | import org.onosproject.core.ApplicationId; |
| 28 | import org.onosproject.core.CoreService; |
| 29 | import org.onosproject.k8snetworking.api.K8sFlowRuleService; |
| 30 | import org.onosproject.k8snode.api.K8sNode; |
| 31 | import org.onosproject.k8snode.api.K8sNodeAdminService; |
| 32 | import org.onosproject.k8snode.api.K8sNodeEvent; |
| 33 | import org.onosproject.k8snode.api.K8sNodeListener; |
| 34 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 35 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 36 | import org.onosproject.net.flow.TrafficSelector; |
| 37 | import org.onosproject.net.flow.TrafficTreatment; |
| 38 | import org.onosproject.net.packet.DefaultOutboundPacket; |
| 39 | import org.onosproject.net.packet.InboundPacket; |
| 40 | import org.onosproject.net.packet.PacketContext; |
| 41 | import org.onosproject.net.packet.PacketProcessor; |
| 42 | import org.onosproject.net.packet.PacketService; |
| 43 | import org.osgi.service.component.annotations.Activate; |
| 44 | import org.osgi.service.component.annotations.Component; |
| 45 | import org.osgi.service.component.annotations.Deactivate; |
| 46 | import org.osgi.service.component.annotations.Reference; |
| 47 | import org.osgi.service.component.annotations.ReferenceCardinality; |
| 48 | import org.slf4j.Logger; |
| 49 | |
| 50 | import java.nio.ByteBuffer; |
| 51 | import java.util.Objects; |
| 52 | import java.util.Set; |
| 53 | import java.util.concurrent.ExecutorService; |
| 54 | import java.util.stream.Collectors; |
| 55 | |
| 56 | import static java.lang.Thread.sleep; |
| 57 | import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| 58 | import static org.onlab.util.Tools.groupedThreads; |
| 59 | import static org.onosproject.k8snetworking.api.Constants.EXT_ENTRY_TABLE; |
| 60 | import static org.onosproject.k8snetworking.api.Constants.K8S_NETWORKING_APP_ID; |
Jian Li | 44c2b12 | 2019-05-03 14:46:34 +0900 | [diff] [blame] | 61 | import static org.onosproject.k8snetworking.api.Constants.PRIORITY_ARP_POD_RULE; |
Jian Li | 1b08d65 | 2019-05-02 17:28:09 +0900 | [diff] [blame] | 62 | import static org.onosproject.k8snetworking.api.Constants.PRIORITY_ARP_REPLY_RULE; |
| 63 | import static org.slf4j.LoggerFactory.getLogger; |
| 64 | |
| 65 | /** |
| 66 | * Handles ARP request/reply from external gateway. |
| 67 | */ |
| 68 | @Component(immediate = true) |
| 69 | public class K8sRoutingArpHandler { |
| 70 | private final Logger log = getLogger(getClass()); |
| 71 | |
| 72 | private static final long SLEEP_MS = 5000; |
| 73 | |
| 74 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 75 | protected CoreService coreService; |
| 76 | |
| 77 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 78 | protected PacketService packetService; |
| 79 | |
| 80 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 81 | protected ClusterService clusterService; |
| 82 | |
| 83 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 84 | protected LeadershipService leadershipService; |
| 85 | |
| 86 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 87 | protected K8sNodeAdminService k8sNodeService; |
| 88 | |
| 89 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 90 | protected K8sFlowRuleService k8sFlowRuleService; |
| 91 | |
| 92 | private ApplicationId appId; |
| 93 | private NodeId localNodeId; |
| 94 | |
| 95 | private final InternalK8sNodeListener k8sNodeListener = new InternalK8sNodeListener(); |
| 96 | private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| 97 | groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| 98 | |
| 99 | private final PacketProcessor packetProcessor = new InternalPacketProcessor(); |
| 100 | |
| 101 | @Activate |
| 102 | protected void activate() { |
| 103 | appId = coreService.registerApplication(K8S_NETWORKING_APP_ID); |
| 104 | localNodeId = clusterService.getLocalNode().id(); |
| 105 | leadershipService.runForLeadership(appId.name()); |
| 106 | k8sNodeService.addListener(k8sNodeListener); |
| 107 | packetService.addProcessor(packetProcessor, PacketProcessor.director(1)); |
| 108 | log.info("Started"); |
| 109 | } |
| 110 | |
| 111 | @Deactivate |
| 112 | protected void deactivate() { |
| 113 | k8sNodeService.removeListener(k8sNodeListener); |
| 114 | packetService.removeProcessor(packetProcessor); |
| 115 | leadershipService.withdraw(appId.name()); |
| 116 | eventExecutor.shutdown(); |
| 117 | log.info("Stopped"); |
| 118 | } |
| 119 | |
| 120 | private void processArpPacket(PacketContext context, Ethernet ethernet) { |
| 121 | ARP arp = (ARP) ethernet.getPayload(); |
| 122 | |
| 123 | if (arp.getOpCode() == ARP.OP_REPLY) { |
| 124 | IpAddress spa = Ip4Address.valueOf(arp.getSenderProtocolAddress()); |
| 125 | MacAddress sha = MacAddress.valueOf(arp.getSenderHardwareAddress()); |
| 126 | |
Jian Li | 232a32c | 2020-02-04 00:32:21 +0900 | [diff] [blame] | 127 | log.info("ARP reply from ip: {}, mac: {}", spa, sha); |
Jian Li | 1b08d65 | 2019-05-02 17:28:09 +0900 | [diff] [blame] | 128 | |
| 129 | Set<IpAddress> gatewayIps = k8sNodeService.completeNodes().stream() |
| 130 | .map(K8sNode::extGatewayIp).collect(Collectors.toSet()); |
| 131 | |
| 132 | if (!gatewayIps.contains(spa)) { |
| 133 | return; |
| 134 | } |
| 135 | |
Jian Li | 232a32c | 2020-02-04 00:32:21 +0900 | [diff] [blame] | 136 | log.info("ARP reply from external gateway ip: {}, mac: {}", spa, sha); |
| 137 | |
Jian Li | 1b08d65 | 2019-05-02 17:28:09 +0900 | [diff] [blame] | 138 | k8sNodeService.completeNodes().stream() |
| 139 | .filter(n -> n.extGatewayMac() == null) |
| 140 | .forEach(n -> { |
| 141 | K8sNode updated = n.updateExtGatewayMac(sha); |
| 142 | k8sNodeService.updateNode(updated); |
| 143 | }); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | private void sendArpRequest(K8sNode k8sNode) { |
| 148 | MacAddress bridgeMac = k8sNode.extBridgeMac(); |
| 149 | IpAddress bridgeIp = k8sNode.extBridgeIp(); |
| 150 | IpAddress extGatewayIp = k8sNode.extGatewayIp(); |
| 151 | Ethernet ethRequest = ARP.buildArpRequest(bridgeMac.toBytes(), bridgeIp.toOctets(), |
| 152 | extGatewayIp.toOctets(), VlanId.NO_VID); |
| 153 | |
| 154 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 155 | .setOutput(k8sNode.extBridgePortNum()) |
| 156 | .build(); |
| 157 | |
| 158 | packetService.emit(new DefaultOutboundPacket( |
| 159 | k8sNode.extBridge(), |
| 160 | treatment, |
| 161 | ByteBuffer.wrap(ethRequest.serialize()))); |
| 162 | } |
| 163 | |
| 164 | private void setArpReplyRule(K8sNode k8sNode, boolean install) { |
| 165 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 166 | .matchEthType(Ethernet.TYPE_ARP) |
| 167 | .matchArpOp(ARP.OP_REPLY) |
| 168 | .matchArpSpa(Ip4Address.valueOf(k8sNode.extGatewayIp().toString())) |
| 169 | .build(); |
| 170 | |
| 171 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 172 | .punt() |
| 173 | .build(); |
| 174 | |
| 175 | k8sFlowRuleService.setRule( |
| 176 | appId, |
| 177 | k8sNode.extBridge(), |
| 178 | selector, |
| 179 | treatment, |
| 180 | PRIORITY_ARP_REPLY_RULE, |
| 181 | EXT_ENTRY_TABLE, |
| 182 | install |
| 183 | ); |
| 184 | } |
| 185 | |
Jian Li | 44c2b12 | 2019-05-03 14:46:34 +0900 | [diff] [blame] | 186 | private void setPodArpRequestRule(K8sNode k8sNode, boolean install) { |
Jian Li | 8916418 | 2020-09-04 19:38:37 +0900 | [diff] [blame] | 187 | if (k8sNode.extBridgePortNum() == null) { |
| 188 | log.warn("External bridge port is disabled."); |
| 189 | return; |
| 190 | } |
| 191 | |
Jian Li | 44c2b12 | 2019-05-03 14:46:34 +0900 | [diff] [blame] | 192 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 193 | .matchInPort(k8sNode.extToIntgPatchPortNum()) |
| 194 | .matchEthType(Ethernet.TYPE_ARP) |
| 195 | .matchArpOp(ARP.OP_REQUEST) |
| 196 | .build(); |
| 197 | |
| 198 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 199 | .setOutput(k8sNode.extBridgePortNum()) |
| 200 | .build(); |
| 201 | |
| 202 | k8sFlowRuleService.setRule( |
| 203 | appId, |
| 204 | k8sNode.extBridge(), |
| 205 | selector, |
| 206 | treatment, |
| 207 | PRIORITY_ARP_POD_RULE, |
| 208 | EXT_ENTRY_TABLE, |
| 209 | install |
| 210 | ); |
| 211 | } |
| 212 | |
| 213 | private void setPodArpReplyRule(K8sNode k8sNode, boolean install) { |
| 214 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 215 | .matchInPort(k8sNode.extBridgePortNum()) |
| 216 | .matchEthType(Ethernet.TYPE_ARP) |
| 217 | .matchArpOp(ARP.OP_REPLY) |
| 218 | .build(); |
| 219 | |
| 220 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 221 | .setOutput(k8sNode.extToIntgPatchPortNum()) |
| 222 | .build(); |
| 223 | |
| 224 | k8sFlowRuleService.setRule( |
| 225 | appId, |
| 226 | k8sNode.extBridge(), |
| 227 | selector, |
| 228 | treatment, |
| 229 | PRIORITY_ARP_POD_RULE, |
| 230 | EXT_ENTRY_TABLE, |
| 231 | install |
| 232 | ); |
| 233 | } |
| 234 | |
Jian Li | 1b08d65 | 2019-05-02 17:28:09 +0900 | [diff] [blame] | 235 | private class InternalK8sNodeListener implements K8sNodeListener { |
| 236 | |
| 237 | private boolean isRelevantHelper() { |
| 238 | return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| 239 | } |
| 240 | |
| 241 | @Override |
| 242 | public void event(K8sNodeEvent event) { |
| 243 | switch (event.type()) { |
| 244 | case K8S_NODE_COMPLETE: |
| 245 | eventExecutor.execute(() -> processNodeCompletion(event.subject())); |
| 246 | break; |
| 247 | case K8S_NODE_INCOMPLETE: |
| 248 | default: |
| 249 | break; |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | private void processNodeCompletion(K8sNode k8sNode) { |
| 254 | if (!isRelevantHelper()) { |
| 255 | return; |
| 256 | } |
| 257 | |
| 258 | setArpReplyRule(k8sNode, true); |
Jian Li | 44c2b12 | 2019-05-03 14:46:34 +0900 | [diff] [blame] | 259 | setPodArpRequestRule(k8sNode, true); |
| 260 | setPodArpReplyRule(k8sNode, true); |
Jian Li | 1b08d65 | 2019-05-02 17:28:09 +0900 | [diff] [blame] | 261 | |
| 262 | try { |
| 263 | sleep(SLEEP_MS); |
| 264 | } catch (InterruptedException e) { |
| 265 | log.error("Exception caused during ARP requesting..."); |
| 266 | } |
| 267 | |
| 268 | sendArpRequest(k8sNode); |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | private class InternalPacketProcessor implements PacketProcessor { |
| 273 | |
| 274 | @Override |
| 275 | public void process(PacketContext context) { |
| 276 | if (context.isHandled()) { |
| 277 | return; |
| 278 | } |
| 279 | |
| 280 | InboundPacket pkt = context.inPacket(); |
| 281 | Ethernet ethernet = pkt.parsed(); |
| 282 | if (ethernet != null && ethernet.getEtherType() == Ethernet.TYPE_ARP) { |
| 283 | eventExecutor.execute(() -> processArpPacket(context, ethernet)); |
| 284 | } |
| 285 | } |
| 286 | } |
| 287 | } |