| /* |
| * Copyright 2019-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.k8snetworking.impl; |
| |
| import org.onlab.packet.ARP; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.VlanId; |
| import org.onosproject.cluster.ClusterService; |
| import org.onosproject.cluster.LeadershipService; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.k8snetworking.api.K8sFlowRuleService; |
| import org.onosproject.k8snode.api.K8sNode; |
| import org.onosproject.k8snode.api.K8sNodeAdminService; |
| import org.onosproject.k8snode.api.K8sNodeEvent; |
| import org.onosproject.k8snode.api.K8sNodeListener; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.packet.DefaultOutboundPacket; |
| import org.onosproject.net.packet.InboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| import org.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.ExecutorService; |
| import java.util.stream.Collectors; |
| |
| import static java.lang.Thread.sleep; |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.k8snetworking.api.Constants.EXT_ENTRY_TABLE; |
| import static org.onosproject.k8snetworking.api.Constants.K8S_NETWORKING_APP_ID; |
| import static org.onosproject.k8snetworking.api.Constants.PRIORITY_ARP_POD_RULE; |
| import static org.onosproject.k8snetworking.api.Constants.PRIORITY_ARP_REPLY_RULE; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Handles ARP request/reply from external gateway. |
| */ |
| @Component(immediate = true) |
| public class K8sRoutingArpHandler { |
| private final Logger log = getLogger(getClass()); |
| |
| private static final long SLEEP_MS = 5000; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected LeadershipService leadershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected K8sNodeAdminService k8sNodeService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected K8sFlowRuleService k8sFlowRuleService; |
| |
| private ApplicationId appId; |
| private NodeId localNodeId; |
| |
| private final InternalK8sNodeListener k8sNodeListener = new InternalK8sNodeListener(); |
| private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| |
| private final PacketProcessor packetProcessor = new InternalPacketProcessor(); |
| |
| @Activate |
| protected void activate() { |
| appId = coreService.registerApplication(K8S_NETWORKING_APP_ID); |
| localNodeId = clusterService.getLocalNode().id(); |
| leadershipService.runForLeadership(appId.name()); |
| k8sNodeService.addListener(k8sNodeListener); |
| packetService.addProcessor(packetProcessor, PacketProcessor.director(1)); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| k8sNodeService.removeListener(k8sNodeListener); |
| packetService.removeProcessor(packetProcessor); |
| leadershipService.withdraw(appId.name()); |
| eventExecutor.shutdown(); |
| log.info("Stopped"); |
| } |
| |
| private void processArpPacket(PacketContext context, Ethernet ethernet) { |
| ARP arp = (ARP) ethernet.getPayload(); |
| |
| if (arp.getOpCode() == ARP.OP_REPLY) { |
| IpAddress spa = Ip4Address.valueOf(arp.getSenderProtocolAddress()); |
| MacAddress sha = MacAddress.valueOf(arp.getSenderHardwareAddress()); |
| |
| log.info("ARP reply from external gateway ip: {}, mac: {}", spa, sha); |
| |
| Set<IpAddress> gatewayIps = k8sNodeService.completeNodes().stream() |
| .map(K8sNode::extGatewayIp).collect(Collectors.toSet()); |
| |
| if (!gatewayIps.contains(spa)) { |
| return; |
| } |
| |
| k8sNodeService.completeNodes().stream() |
| .filter(n -> n.extGatewayMac() == null) |
| .forEach(n -> { |
| K8sNode updated = n.updateExtGatewayMac(sha); |
| k8sNodeService.updateNode(updated); |
| }); |
| } |
| } |
| |
| private void sendArpRequest(K8sNode k8sNode) { |
| MacAddress bridgeMac = k8sNode.extBridgeMac(); |
| IpAddress bridgeIp = k8sNode.extBridgeIp(); |
| IpAddress extGatewayIp = k8sNode.extGatewayIp(); |
| Ethernet ethRequest = ARP.buildArpRequest(bridgeMac.toBytes(), bridgeIp.toOctets(), |
| extGatewayIp.toOctets(), VlanId.NO_VID); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(k8sNode.extBridgePortNum()) |
| .build(); |
| |
| packetService.emit(new DefaultOutboundPacket( |
| k8sNode.extBridge(), |
| treatment, |
| ByteBuffer.wrap(ethRequest.serialize()))); |
| } |
| |
| private void setArpReplyRule(K8sNode k8sNode, boolean install) { |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_ARP) |
| .matchArpOp(ARP.OP_REPLY) |
| .matchArpSpa(Ip4Address.valueOf(k8sNode.extGatewayIp().toString())) |
| .build(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .punt() |
| .build(); |
| |
| k8sFlowRuleService.setRule( |
| appId, |
| k8sNode.extBridge(), |
| selector, |
| treatment, |
| PRIORITY_ARP_REPLY_RULE, |
| EXT_ENTRY_TABLE, |
| install |
| ); |
| } |
| |
| private void setPodArpRequestRule(K8sNode k8sNode, boolean install) { |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchInPort(k8sNode.extToIntgPatchPortNum()) |
| .matchEthType(Ethernet.TYPE_ARP) |
| .matchArpOp(ARP.OP_REQUEST) |
| .build(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(k8sNode.extBridgePortNum()) |
| .build(); |
| |
| k8sFlowRuleService.setRule( |
| appId, |
| k8sNode.extBridge(), |
| selector, |
| treatment, |
| PRIORITY_ARP_POD_RULE, |
| EXT_ENTRY_TABLE, |
| install |
| ); |
| } |
| |
| private void setPodArpReplyRule(K8sNode k8sNode, boolean install) { |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchInPort(k8sNode.extBridgePortNum()) |
| .matchEthType(Ethernet.TYPE_ARP) |
| .matchArpOp(ARP.OP_REPLY) |
| .build(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setOutput(k8sNode.extToIntgPatchPortNum()) |
| .build(); |
| |
| k8sFlowRuleService.setRule( |
| appId, |
| k8sNode.extBridge(), |
| selector, |
| treatment, |
| PRIORITY_ARP_POD_RULE, |
| EXT_ENTRY_TABLE, |
| install |
| ); |
| } |
| |
| private class InternalK8sNodeListener implements K8sNodeListener { |
| |
| private boolean isRelevantHelper() { |
| return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| } |
| |
| @Override |
| public void event(K8sNodeEvent event) { |
| switch (event.type()) { |
| case K8S_NODE_COMPLETE: |
| eventExecutor.execute(() -> processNodeCompletion(event.subject())); |
| break; |
| case K8S_NODE_INCOMPLETE: |
| default: |
| break; |
| } |
| } |
| |
| private void processNodeCompletion(K8sNode k8sNode) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| |
| setArpReplyRule(k8sNode, true); |
| setPodArpRequestRule(k8sNode, true); |
| setPodArpReplyRule(k8sNode, true); |
| |
| try { |
| sleep(SLEEP_MS); |
| } catch (InterruptedException e) { |
| log.error("Exception caused during ARP requesting..."); |
| } |
| |
| sendArpRequest(k8sNode); |
| } |
| } |
| |
| private class InternalPacketProcessor implements PacketProcessor { |
| |
| @Override |
| public void process(PacketContext context) { |
| if (context.isHandled()) { |
| return; |
| } |
| |
| InboundPacket pkt = context.inPacket(); |
| Ethernet ethernet = pkt.parsed(); |
| if (ethernet != null && ethernet.getEtherType() == Ethernet.TYPE_ARP) { |
| eventExecutor.execute(() -> processArpPacket(context, ethernet)); |
| } |
| } |
| } |
| } |