| /* |
| * 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.Ethernet; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onlab.packet.TpPort; |
| 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.K8sNodeEvent; |
| import org.onosproject.k8snode.api.K8sNodeListener; |
| import org.onosproject.k8snode.api.K8sNodeService; |
| import org.onosproject.net.PortNumber; |
| 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.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.util.Objects; |
| import java.util.concurrent.ExecutorService; |
| |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.k8snetworking.api.Constants.FORWARDING_TABLE; |
| import static org.onosproject.k8snetworking.api.Constants.K8S_NETWORKING_APP_ID; |
| import static org.onosproject.k8snetworking.api.Constants.PRIORITY_TRANSLATION_RULE; |
| import static org.onosproject.k8snetworking.api.Constants.STAT_OUTBOUND_TABLE; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Handles kubernetes API server requests from pods. |
| */ |
| @Component(immediate = true) |
| public class K8sApiServerProxyHandler { |
| protected final Logger log = getLogger(getClass()); |
| |
| private static final String API_SERVER_CLUSTER_IP = "10.96.0.1"; |
| private static final int API_SERVER_CLUSTER_PORT = 443; |
| private static final String API_SERVER_IP = "10.10.10.1"; |
| private static final int API_SERVER_PORT = 6443; |
| private static final int PREFIX_LENGTH = 32; |
| |
| @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 K8sNodeService k8sNodeService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected K8sFlowRuleService k8sFlowRuleService; |
| |
| private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| private final K8sNodeListener k8sNodeListener = new InternalNodeEventListener(); |
| |
| private ApplicationId appId; |
| private NodeId localNodeId; |
| |
| @Activate |
| protected void activate() { |
| appId = coreService.registerApplication(K8S_NETWORKING_APP_ID); |
| localNodeId = clusterService.getLocalNode().id(); |
| k8sNodeService.addListener(k8sNodeListener); |
| leadershipService.runForLeadership(appId.name()); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| k8sNodeService.removeListener(k8sNodeListener); |
| leadershipService.withdraw(appId.name()); |
| eventExecutor.shutdown(); |
| |
| log.info("Stopped"); |
| } |
| |
| private class InternalNodeEventListener implements K8sNodeListener { |
| |
| private boolean isRelevantHelper() { |
| return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| } |
| |
| @Override |
| public void event(K8sNodeEvent event) { |
| K8sNode k8sNode = event.subject(); |
| switch (event.type()) { |
| case K8S_NODE_COMPLETE: |
| eventExecutor.execute(() -> processNodeCompletion(k8sNode)); |
| break; |
| case K8S_NODE_INCOMPLETE: |
| eventExecutor.execute(() -> processNodeIncompletion(k8sNode)); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| private void processNodeCompletion(K8sNode k8sNode) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| |
| setRequestTranslationRule(k8sNode, true); |
| setResponseTranslationRule(k8sNode, true); |
| } |
| |
| private void processNodeIncompletion(K8sNode k8sNode) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| |
| setRequestTranslationRule(k8sNode, false); |
| setResponseTranslationRule(k8sNode, false); |
| } |
| |
| /** |
| * Installs k8s API server rule for receiving all API request packets. |
| * |
| * @param k8sNode kubernetes node |
| * @param install installation flag |
| */ |
| private void setRequestTranslationRule(K8sNode k8sNode, boolean install) { |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_TCP) |
| .matchIPDst(IpPrefix.valueOf( |
| IpAddress.valueOf(API_SERVER_CLUSTER_IP), PREFIX_LENGTH)) |
| .matchTcpDst(TpPort.tpPort(API_SERVER_CLUSTER_PORT)) |
| .build(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setIpDst(IpAddress.valueOf(API_SERVER_IP)) |
| .setTcpDst(TpPort.tpPort(API_SERVER_PORT)) |
| .setOutput(PortNumber.LOCAL) |
| .build(); |
| |
| k8sFlowRuleService.setRule( |
| appId, |
| k8sNode.intgBridge(), |
| selector, |
| treatment, |
| PRIORITY_TRANSLATION_RULE, |
| STAT_OUTBOUND_TABLE, |
| install |
| ); |
| } |
| |
| /** |
| * Installs k8s API server rule for receiving all API response packets. |
| * |
| * @param k8sNode kubernetes node |
| * @param install installation flag |
| */ |
| private void setResponseTranslationRule(K8sNode k8sNode, boolean install) { |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_TCP) |
| .matchIPSrc(IpPrefix.valueOf( |
| IpAddress.valueOf(API_SERVER_IP), PREFIX_LENGTH)) |
| .matchTcpSrc(TpPort.tpPort(API_SERVER_PORT)) |
| .build(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .setIpSrc(IpAddress.valueOf(API_SERVER_CLUSTER_IP)) |
| .setTcpSrc(TpPort.tpPort(API_SERVER_CLUSTER_PORT)) |
| .transition(FORWARDING_TABLE) |
| .build(); |
| |
| k8sFlowRuleService.setRule( |
| appId, |
| k8sNode.intgBridge(), |
| selector, |
| treatment, |
| PRIORITY_TRANSLATION_RULE, |
| STAT_OUTBOUND_TABLE, |
| install |
| ); |
| } |
| } |
| } |