Jian Li | eb488ea | 2019-04-16 01:50:02 +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.IpPrefix; |
| 22 | import org.onlab.packet.TpPort; |
| 23 | import org.onosproject.cluster.ClusterService; |
| 24 | import org.onosproject.cluster.LeadershipService; |
| 25 | import org.onosproject.cluster.NodeId; |
| 26 | import org.onosproject.core.ApplicationId; |
| 27 | import org.onosproject.core.CoreService; |
| 28 | import org.onosproject.k8snetworking.api.K8sFlowRuleService; |
| 29 | import org.onosproject.k8snetworking.api.K8sNetwork; |
| 30 | import org.onosproject.k8snetworking.api.K8sNetworkEvent; |
| 31 | import org.onosproject.k8snetworking.api.K8sNetworkListener; |
| 32 | import org.onosproject.k8snetworking.api.K8sNetworkService; |
| 33 | import org.onosproject.k8snetworking.api.K8sPort; |
| 34 | import org.onosproject.k8snetworking.util.RulePopulatorUtil; |
| 35 | import org.onosproject.k8snode.api.K8sNode; |
| 36 | import org.onosproject.k8snode.api.K8sNodeEvent; |
| 37 | import org.onosproject.k8snode.api.K8sNodeListener; |
| 38 | import org.onosproject.k8snode.api.K8sNodeService; |
| 39 | import org.onosproject.mastership.MastershipService; |
| 40 | import org.onosproject.net.Device; |
| 41 | import org.onosproject.net.DeviceId; |
| 42 | import org.onosproject.net.PortNumber; |
| 43 | import org.onosproject.net.device.DeviceService; |
| 44 | import org.onosproject.net.driver.DriverService; |
| 45 | import org.onosproject.net.flow.DefaultTrafficSelector; |
| 46 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 47 | import org.onosproject.net.flow.TrafficSelector; |
| 48 | import org.onosproject.net.flow.TrafficTreatment; |
| 49 | import org.onosproject.net.flow.instructions.ExtensionTreatment; |
| 50 | import org.osgi.service.component.annotations.Activate; |
| 51 | import org.osgi.service.component.annotations.Component; |
| 52 | import org.osgi.service.component.annotations.Deactivate; |
| 53 | import org.osgi.service.component.annotations.Reference; |
| 54 | import org.osgi.service.component.annotations.ReferenceCardinality; |
| 55 | import org.slf4j.Logger; |
| 56 | |
| 57 | import java.util.Objects; |
| 58 | import java.util.concurrent.ExecutorService; |
| 59 | |
| 60 | import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| 61 | import static org.onlab.util.Tools.groupedThreads; |
| 62 | import static org.onosproject.k8snetworking.api.Constants.DEFAULT_GATEWAY_MAC; |
| 63 | import static org.onosproject.k8snetworking.api.Constants.GW_COMMON_TABLE; |
| 64 | import static org.onosproject.k8snetworking.api.Constants.K8S_NETWORKING_APP_ID; |
| 65 | import static org.onosproject.k8snetworking.api.Constants.PRIORITY_EXTERNAL_ROUTING_RULE; |
| 66 | import static org.onosproject.k8snetworking.api.Constants.PRIORITY_STATEFUL_SNAT_RULE; |
| 67 | import static org.onosproject.k8snetworking.api.Constants.ROUTING_TABLE; |
| 68 | import static org.onosproject.k8snetworking.util.RulePopulatorUtil.CT_NAT_SRC_FLAG; |
| 69 | import static org.onosproject.k8snetworking.util.RulePopulatorUtil.buildMoveArpShaToThaExtension; |
| 70 | import static org.onosproject.k8snetworking.util.RulePopulatorUtil.buildMoveArpSpaToTpaExtension; |
| 71 | import static org.onosproject.k8snetworking.util.RulePopulatorUtil.buildMoveEthSrcToDstExtension; |
| 72 | import static org.slf4j.LoggerFactory.getLogger; |
| 73 | |
| 74 | /** |
| 75 | * Provides POD's internal to external connectivity using source NAT (SNAT). |
| 76 | */ |
| 77 | @Component(immediate = true) |
| 78 | public class K8sRoutingSnatHandler { |
| 79 | |
| 80 | private final Logger log = getLogger(getClass()); |
| 81 | |
| 82 | private static final int POD_PREFIX = 32; |
| 83 | |
| 84 | private static final int TP_PORT_MINIMUM_NUM = 1025; |
| 85 | private static final int TP_PORT_MAXIMUM_NUM = 65535; |
| 86 | |
| 87 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 88 | protected CoreService coreService; |
| 89 | |
| 90 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 91 | protected DeviceService deviceService; |
| 92 | |
| 93 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 94 | protected DriverService driverService; |
| 95 | |
| 96 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 97 | protected LeadershipService leadershipService; |
| 98 | |
| 99 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 100 | protected MastershipService mastershipService; |
| 101 | |
| 102 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 103 | protected ClusterService clusterService; |
| 104 | |
| 105 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 106 | protected K8sNetworkService k8sNetworkService; |
| 107 | |
| 108 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 109 | protected K8sNodeService k8sNodeService; |
| 110 | |
| 111 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 112 | protected K8sFlowRuleService k8sFlowRuleService; |
| 113 | |
| 114 | private final InternalK8sNetworkListener k8sNetworkListener = |
| 115 | new InternalK8sNetworkListener(); |
| 116 | private final InternalK8sNodeListener k8sNodeListener = |
| 117 | new InternalK8sNodeListener(); |
| 118 | private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| 119 | groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| 120 | |
| 121 | private ApplicationId appId; |
| 122 | private NodeId localNodeId; |
| 123 | |
| 124 | @Activate |
| 125 | protected void activate() { |
| 126 | appId = coreService.registerApplication(K8S_NETWORKING_APP_ID); |
| 127 | |
| 128 | localNodeId = clusterService.getLocalNode().id(); |
| 129 | leadershipService.runForLeadership(appId.name()); |
| 130 | k8sNetworkService.addListener(k8sNetworkListener); |
| 131 | k8sNodeService.addListener(k8sNodeListener); |
| 132 | |
| 133 | log.info("Started"); |
| 134 | } |
| 135 | |
| 136 | @Deactivate |
| 137 | protected void deactivate() { |
| 138 | k8sNodeService.removeListener(k8sNodeListener); |
| 139 | k8sNetworkService.removeListener(k8sNetworkListener); |
| 140 | leadershipService.withdraw(appId.name()); |
| 141 | eventExecutor.shutdown(); |
| 142 | |
| 143 | log.info("Stopped"); |
| 144 | } |
| 145 | |
| 146 | private void setContainerToExtRule(K8sNode k8sNode, boolean install) { |
| 147 | |
| 148 | K8sNetwork net = k8sNetworkService.network(k8sNode.hostname()); |
| 149 | |
| 150 | if (net == null) { |
| 151 | return; |
| 152 | } |
| 153 | |
| 154 | TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder() |
| 155 | .matchEthType(Ethernet.TYPE_IPV4) |
| 156 | .matchTunnelId(Long.valueOf(net.segmentId())) |
| 157 | .matchEthDst(DEFAULT_GATEWAY_MAC); |
| 158 | |
| 159 | TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder() |
| 160 | .setOutput(k8sNode.intgToExtPatchPortNum()); |
| 161 | |
| 162 | k8sFlowRuleService.setRule( |
| 163 | appId, |
| 164 | k8sNode.intgBridge(), |
| 165 | sBuilder.build(), |
| 166 | tBuilder.build(), |
| 167 | PRIORITY_EXTERNAL_ROUTING_RULE, |
| 168 | ROUTING_TABLE, |
| 169 | install); |
| 170 | } |
| 171 | |
| 172 | private void setExtToContainerRule(K8sNode k8sNode, |
| 173 | K8sPort k8sPort, boolean install) { |
| 174 | |
| 175 | K8sNetwork net = k8sNetworkService.network(k8sPort.networkId()); |
| 176 | |
| 177 | if (net == null) { |
| 178 | return; |
| 179 | } |
| 180 | |
| 181 | TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder() |
| 182 | .matchEthType(Ethernet.TYPE_IPV4) |
| 183 | .matchIPDst(IpPrefix.valueOf(k8sPort.ipAddress(), POD_PREFIX)); |
| 184 | |
| 185 | TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder() |
| 186 | .setOutput(k8sNode.extToIntgPatchPortNum()); |
| 187 | |
| 188 | k8sFlowRuleService.setRule( |
| 189 | appId, |
| 190 | k8sNode.extBridge(), |
| 191 | sBuilder.build(), |
| 192 | tBuilder.build(), |
| 193 | PRIORITY_STATEFUL_SNAT_RULE, |
| 194 | GW_COMMON_TABLE, |
| 195 | install); |
| 196 | } |
| 197 | |
| 198 | private void setSnatDownstreamRule(K8sNode k8sNode, |
| 199 | boolean install) { |
| 200 | DeviceId deviceId = k8sNode.extBridge(); |
| 201 | |
| 202 | TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder(); |
| 203 | sBuilder.matchEthType(Ethernet.TYPE_IPV4) |
| 204 | .matchIPDst(IpPrefix.valueOf(k8sNode.extBridgeIp(), POD_PREFIX)); |
| 205 | |
| 206 | ExtensionTreatment natTreatment = RulePopulatorUtil |
| 207 | .niciraConnTrackTreatmentBuilder(driverService, deviceId) |
| 208 | .commit(false) |
| 209 | .natAction(true) |
| 210 | .table((short) 0) |
| 211 | .build(); |
| 212 | |
| 213 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 214 | .setEthSrc(DEFAULT_GATEWAY_MAC) |
| 215 | .extension(natTreatment, deviceId) |
| 216 | .build(); |
| 217 | |
| 218 | k8sFlowRuleService.setRule( |
| 219 | appId, |
| 220 | deviceId, |
| 221 | sBuilder.build(), |
| 222 | treatment, |
| 223 | PRIORITY_STATEFUL_SNAT_RULE, |
| 224 | GW_COMMON_TABLE, |
| 225 | install); |
| 226 | } |
| 227 | |
| 228 | private void setSnatUpstreamRule(K8sNode k8sNode, |
| 229 | boolean install) { |
| 230 | |
| 231 | K8sNetwork net = k8sNetworkService.network(k8sNode.hostname()); |
| 232 | |
| 233 | if (net == null) { |
| 234 | return; |
| 235 | } |
| 236 | |
| 237 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 238 | .matchEthType(Ethernet.TYPE_IPV4) |
| 239 | .matchEthDst(DEFAULT_GATEWAY_MAC) |
| 240 | .build(); |
| 241 | |
| 242 | TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder(); |
| 243 | |
| 244 | if (install) { |
| 245 | ExtensionTreatment natTreatment = RulePopulatorUtil |
| 246 | .niciraConnTrackTreatmentBuilder(driverService, k8sNode.extBridge()) |
| 247 | .commit(true) |
| 248 | .natFlag(CT_NAT_SRC_FLAG) |
| 249 | .natAction(true) |
| 250 | .natIp(k8sNode.extBridgeIp()) |
| 251 | .natPortMin(TpPort.tpPort(TP_PORT_MINIMUM_NUM)) |
| 252 | .natPortMax(TpPort.tpPort(TP_PORT_MAXIMUM_NUM)) |
| 253 | .build(); |
| 254 | |
| 255 | tBuilder.extension(natTreatment, k8sNode.extBridge()) |
| 256 | .setEthSrc(k8sNode.extBridgeMac()) |
| 257 | .setEthDst(k8sNode.extGatewayMac()) |
| 258 | .setOutput(k8sNode.extBridgePortNum()); |
| 259 | } |
| 260 | |
| 261 | k8sFlowRuleService.setRule( |
| 262 | appId, |
| 263 | k8sNode.extBridge(), |
| 264 | selector, |
| 265 | tBuilder.build(), |
| 266 | PRIORITY_STATEFUL_SNAT_RULE, |
| 267 | GW_COMMON_TABLE, |
| 268 | install); |
| 269 | } |
| 270 | |
| 271 | private void setExtIntfArpRule(K8sNode k8sNode, boolean install) { |
| 272 | |
| 273 | Device device = deviceService.getDevice(k8sNode.extBridge()); |
| 274 | |
| 275 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 276 | .matchEthType(Ethernet.TYPE_ARP) |
| 277 | .matchArpOp(ARP.OP_REQUEST) |
| 278 | .matchArpTpa(Ip4Address.valueOf(k8sNode.extBridgeIp().toString())) |
| 279 | .build(); |
| 280 | |
| 281 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 282 | .setArpOp(ARP.OP_REPLY) |
| 283 | .extension(buildMoveEthSrcToDstExtension(device), device.id()) |
| 284 | .extension(buildMoveArpShaToThaExtension(device), device.id()) |
| 285 | .extension(buildMoveArpSpaToTpaExtension(device), device.id()) |
| 286 | .setArpSpa(Ip4Address.valueOf(k8sNode.extBridgeIp().toString())) |
| 287 | .setArpSha(k8sNode.extBridgeMac()) |
| 288 | .setOutput(PortNumber.IN_PORT) |
| 289 | .build(); |
| 290 | |
| 291 | k8sFlowRuleService.setRule( |
| 292 | appId, |
| 293 | k8sNode.extBridge(), |
| 294 | selector, |
| 295 | treatment, |
| 296 | PRIORITY_STATEFUL_SNAT_RULE, |
| 297 | GW_COMMON_TABLE, |
| 298 | install); |
| 299 | } |
| 300 | |
| 301 | private class InternalK8sNodeListener implements K8sNodeListener { |
| 302 | |
| 303 | private boolean isRelevantHelper() { |
| 304 | return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| 305 | } |
| 306 | |
| 307 | @Override |
| 308 | public void event(K8sNodeEvent event) { |
| 309 | switch (event.type()) { |
| 310 | case K8S_NODE_COMPLETE: |
| 311 | eventExecutor.execute(() -> processNodeCompletion(event.subject())); |
| 312 | break; |
| 313 | case K8S_NODE_INCOMPLETE: |
| 314 | default: |
| 315 | break; |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | private void processNodeCompletion(K8sNode k8sNode) { |
| 320 | if (!isRelevantHelper()) { |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | setExtIntfArpRule(k8sNode, true); |
| 325 | setSnatUpstreamRule(k8sNode, true); |
| 326 | setSnatDownstreamRule(k8sNode, true); |
| 327 | setContainerToExtRule(k8sNode, true); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | private class InternalK8sNetworkListener implements K8sNetworkListener { |
| 332 | |
| 333 | private boolean isRelevantHelper() { |
| 334 | return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| 335 | } |
| 336 | |
| 337 | @Override |
| 338 | public void event(K8sNetworkEvent event) { |
| 339 | switch (event.type()) { |
| 340 | case K8S_PORT_ACTIVATED: |
| 341 | eventExecutor.execute(() -> processPortActivation(event.port())); |
| 342 | break; |
| 343 | case K8S_PORT_REMOVED: |
| 344 | eventExecutor.execute(() -> processPortRemoval(event.port())); |
| 345 | break; |
| 346 | default: |
| 347 | break; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | private void processPortActivation(K8sPort port) { |
| 352 | if (!isRelevantHelper()) { |
| 353 | return; |
| 354 | } |
| 355 | |
| 356 | k8sNodeService.completeNodes().forEach(n -> |
| 357 | setExtToContainerRule(n, port, true)); |
| 358 | } |
| 359 | |
| 360 | private void processPortRemoval(K8sPort port) { |
| 361 | if (!isRelevantHelper()) { |
| 362 | return; |
| 363 | } |
| 364 | |
| 365 | k8sNodeService.completeNodes().forEach(n -> |
| 366 | setExtToContainerRule(n, port, false)); |
| 367 | } |
| 368 | } |
| 369 | } |