Jian Li | d89db46 | 2019-02-08 18:21:57 +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.Ethernet; |
| 19 | import org.onlab.packet.IPv4; |
| 20 | import org.onlab.packet.IpAddress; |
| 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.k8snode.api.K8sNode; |
| 30 | import org.onosproject.k8snode.api.K8sNodeEvent; |
| 31 | import org.onosproject.k8snode.api.K8sNodeListener; |
| 32 | import org.onosproject.k8snode.api.K8sNodeService; |
| 33 | import org.onosproject.net.PortNumber; |
| 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.PacketService; |
| 39 | import org.osgi.service.component.annotations.Activate; |
| 40 | import org.osgi.service.component.annotations.Component; |
| 41 | import org.osgi.service.component.annotations.Deactivate; |
| 42 | import org.osgi.service.component.annotations.Reference; |
| 43 | import org.osgi.service.component.annotations.ReferenceCardinality; |
| 44 | import org.slf4j.Logger; |
| 45 | |
| 46 | import java.util.Objects; |
| 47 | import java.util.concurrent.ExecutorService; |
| 48 | |
| 49 | import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| 50 | import static org.onlab.util.Tools.groupedThreads; |
| 51 | import static org.onosproject.k8snetworking.api.Constants.FORWARDING_TABLE; |
| 52 | import static org.onosproject.k8snetworking.api.Constants.K8S_NETWORKING_APP_ID; |
| 53 | import static org.onosproject.k8snetworking.api.Constants.PRIORITY_TRANSLATION_RULE; |
| 54 | import static org.onosproject.k8snetworking.api.Constants.STAT_OUTBOUND_TABLE; |
| 55 | import static org.slf4j.LoggerFactory.getLogger; |
| 56 | |
| 57 | /** |
| 58 | * Handles kubernetes API server requests from pods. |
| 59 | */ |
| 60 | @Component(immediate = true) |
| 61 | public class K8sApiServerProxyHandler { |
| 62 | protected final Logger log = getLogger(getClass()); |
| 63 | |
| 64 | private static final String API_SERVER_CLUSTER_IP = "10.96.0.1"; |
| 65 | private static final int API_SERVER_CLUSTER_PORT = 443; |
| 66 | private static final String API_SERVER_IP = "10.10.10.1"; |
| 67 | private static final int API_SERVER_PORT = 6443; |
| 68 | private static final int PREFIX_LENGTH = 32; |
| 69 | |
| 70 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 71 | protected CoreService coreService; |
| 72 | |
| 73 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 74 | protected PacketService packetService; |
| 75 | |
| 76 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 77 | protected ClusterService clusterService; |
| 78 | |
| 79 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 80 | protected LeadershipService leadershipService; |
| 81 | |
| 82 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 83 | protected K8sNodeService k8sNodeService; |
| 84 | |
| 85 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 86 | protected K8sFlowRuleService k8sFlowRuleService; |
| 87 | |
| 88 | private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| 89 | groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| 90 | private final K8sNodeListener k8sNodeListener = new InternalNodeEventListener(); |
| 91 | |
| 92 | private ApplicationId appId; |
| 93 | private NodeId localNodeId; |
| 94 | |
| 95 | @Activate |
| 96 | protected void activate() { |
| 97 | appId = coreService.registerApplication(K8S_NETWORKING_APP_ID); |
| 98 | localNodeId = clusterService.getLocalNode().id(); |
| 99 | k8sNodeService.addListener(k8sNodeListener); |
| 100 | leadershipService.runForLeadership(appId.name()); |
| 101 | |
| 102 | log.info("Started"); |
| 103 | } |
| 104 | |
| 105 | @Deactivate |
| 106 | protected void deactivate() { |
| 107 | k8sNodeService.removeListener(k8sNodeListener); |
| 108 | leadershipService.withdraw(appId.name()); |
| 109 | eventExecutor.shutdown(); |
| 110 | |
| 111 | log.info("Stopped"); |
| 112 | } |
| 113 | |
| 114 | private class InternalNodeEventListener implements K8sNodeListener { |
| 115 | |
| 116 | private boolean isRelevantHelper() { |
| 117 | return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public void event(K8sNodeEvent event) { |
| 122 | K8sNode k8sNode = event.subject(); |
| 123 | switch (event.type()) { |
| 124 | case K8S_NODE_COMPLETE: |
| 125 | eventExecutor.execute(() -> processNodeCompletion(k8sNode)); |
| 126 | break; |
| 127 | case K8S_NODE_INCOMPLETE: |
| 128 | eventExecutor.execute(() -> processNodeIncompletion(k8sNode)); |
| 129 | break; |
| 130 | default: |
| 131 | break; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | private void processNodeCompletion(K8sNode k8sNode) { |
| 136 | if (!isRelevantHelper()) { |
| 137 | return; |
| 138 | } |
| 139 | |
| 140 | setRequestTranslationRule(k8sNode, true); |
| 141 | setResponseTranslationRule(k8sNode, true); |
| 142 | } |
| 143 | |
| 144 | private void processNodeIncompletion(K8sNode k8sNode) { |
| 145 | if (!isRelevantHelper()) { |
| 146 | return; |
| 147 | } |
| 148 | |
| 149 | setRequestTranslationRule(k8sNode, false); |
| 150 | setResponseTranslationRule(k8sNode, false); |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Installs k8s API server rule for receiving all API request packets. |
| 155 | * |
| 156 | * @param k8sNode kubernetes node |
| 157 | * @param install installation flag |
| 158 | */ |
| 159 | private void setRequestTranslationRule(K8sNode k8sNode, boolean install) { |
| 160 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 161 | .matchEthType(Ethernet.TYPE_IPV4) |
| 162 | .matchIPProtocol(IPv4.PROTOCOL_TCP) |
| 163 | .matchIPDst(IpPrefix.valueOf( |
| 164 | IpAddress.valueOf(API_SERVER_CLUSTER_IP), PREFIX_LENGTH)) |
| 165 | .matchTcpDst(TpPort.tpPort(API_SERVER_CLUSTER_PORT)) |
| 166 | .build(); |
| 167 | |
| 168 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 169 | .setIpDst(IpAddress.valueOf(API_SERVER_IP)) |
| 170 | .setTcpDst(TpPort.tpPort(API_SERVER_PORT)) |
| 171 | .setOutput(PortNumber.LOCAL) |
| 172 | .build(); |
| 173 | |
| 174 | k8sFlowRuleService.setRule( |
| 175 | appId, |
| 176 | k8sNode.intgBridge(), |
| 177 | selector, |
| 178 | treatment, |
| 179 | PRIORITY_TRANSLATION_RULE, |
| 180 | STAT_OUTBOUND_TABLE, |
| 181 | install |
| 182 | ); |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Installs k8s API server rule for receiving all API response packets. |
| 187 | * |
| 188 | * @param k8sNode kubernetes node |
| 189 | * @param install installation flag |
| 190 | */ |
| 191 | private void setResponseTranslationRule(K8sNode k8sNode, boolean install) { |
| 192 | TrafficSelector selector = DefaultTrafficSelector.builder() |
| 193 | .matchEthType(Ethernet.TYPE_IPV4) |
| 194 | .matchIPProtocol(IPv4.PROTOCOL_TCP) |
| 195 | .matchIPSrc(IpPrefix.valueOf( |
| 196 | IpAddress.valueOf(API_SERVER_IP), PREFIX_LENGTH)) |
| 197 | .matchTcpSrc(TpPort.tpPort(API_SERVER_PORT)) |
| 198 | .build(); |
| 199 | |
| 200 | TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| 201 | .setIpSrc(IpAddress.valueOf(API_SERVER_CLUSTER_IP)) |
| 202 | .setTcpSrc(TpPort.tpPort(API_SERVER_CLUSTER_PORT)) |
| 203 | .transition(FORWARDING_TABLE) |
| 204 | .build(); |
| 205 | |
| 206 | k8sFlowRuleService.setRule( |
| 207 | appId, |
| 208 | k8sNode.intgBridge(), |
| 209 | selector, |
| 210 | treatment, |
| 211 | PRIORITY_TRANSLATION_RULE, |
| 212 | STAT_OUTBOUND_TABLE, |
| 213 | install |
| 214 | ); |
| 215 | } |
| 216 | } |
| 217 | } |