Jian Li | 9b19916 | 2019-02-10 18:00:35 +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 | |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 18 | import io.fabric8.kubernetes.api.model.Pod; |
| 19 | import org.apache.commons.lang.StringUtils; |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 20 | import org.onlab.packet.IpAddress; |
| 21 | import org.onosproject.cluster.ClusterService; |
| 22 | import org.onosproject.cluster.LeadershipService; |
| 23 | import org.onosproject.cluster.NodeId; |
| 24 | import org.onosproject.core.ApplicationId; |
| 25 | import org.onosproject.core.CoreService; |
| 26 | import org.onosproject.k8snetworking.api.K8sIpamAdminService; |
| 27 | import org.onosproject.k8snetworking.api.K8sNetworkEvent; |
| 28 | import org.onosproject.k8snetworking.api.K8sNetworkListener; |
| 29 | import org.onosproject.k8snetworking.api.K8sNetworkService; |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 30 | import org.onosproject.k8snetworking.api.K8sPodEvent; |
| 31 | import org.onosproject.k8snetworking.api.K8sPodListener; |
| 32 | import org.onosproject.k8snetworking.api.K8sPodService; |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 33 | import org.onosproject.mastership.MastershipService; |
| 34 | import org.osgi.service.component.annotations.Activate; |
| 35 | import org.osgi.service.component.annotations.Component; |
| 36 | import org.osgi.service.component.annotations.Deactivate; |
| 37 | import org.osgi.service.component.annotations.Reference; |
| 38 | import org.osgi.service.component.annotations.ReferenceCardinality; |
| 39 | import org.slf4j.Logger; |
| 40 | |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 41 | import java.util.Map; |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 42 | import java.util.Objects; |
| 43 | import java.util.Set; |
| 44 | import java.util.concurrent.ExecutorService; |
| 45 | |
Jian Li | 186fde5 | 2019-08-26 14:54:43 +0900 | [diff] [blame] | 46 | import static java.lang.Thread.sleep; |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 47 | import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| 48 | import static org.onlab.util.Tools.groupedThreads; |
| 49 | import static org.onosproject.k8snetworking.api.Constants.K8S_NETWORKING_APP_ID; |
| 50 | import static org.onosproject.k8snetworking.util.K8sNetworkingUtil.getSubnetIps; |
| 51 | import static org.slf4j.LoggerFactory.getLogger; |
| 52 | |
| 53 | /** |
| 54 | * Initializes and purges the kubernetes IPAM. |
| 55 | */ |
| 56 | @Component(immediate = true) |
| 57 | public class K8sIpamHandler { |
| 58 | |
| 59 | private final Logger log = getLogger(getClass()); |
| 60 | |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 61 | private static final String IP_ADDRESS = "ipAddress"; |
| 62 | private static final String NETWORK_ID = "networkId"; |
| 63 | |
Jian Li | 186fde5 | 2019-08-26 14:54:43 +0900 | [diff] [blame] | 64 | private static final int RETRY_NUM = 5; |
| 65 | private static final int RETRY_DELAY_MS = 3000; |
| 66 | |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 67 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 68 | protected CoreService coreService; |
| 69 | |
| 70 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 71 | protected MastershipService mastershipService; |
| 72 | |
| 73 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 74 | protected ClusterService clusterService; |
| 75 | |
| 76 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 77 | protected LeadershipService leadershipService; |
| 78 | |
| 79 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 80 | protected K8sNetworkService k8sNetworkService; |
| 81 | |
| 82 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 83 | protected K8sPodService k8sPodService; |
| 84 | |
| 85 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 86 | protected K8sIpamAdminService k8sIpamAdminService; |
| 87 | |
| 88 | private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| 89 | groupedThreads(this.getClass().getSimpleName(), "event-handler")); |
| 90 | private final InternalK8sNetworkListener k8sNetworkListener = |
| 91 | new InternalK8sNetworkListener(); |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 92 | private final InternalK8sPodListener k8sPodListener = |
| 93 | new InternalK8sPodListener(); |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 94 | |
| 95 | private ApplicationId appId; |
| 96 | private NodeId localNodeId; |
| 97 | |
| 98 | @Activate |
| 99 | protected void activate() { |
| 100 | appId = coreService.registerApplication(K8S_NETWORKING_APP_ID); |
| 101 | localNodeId = clusterService.getLocalNode().id(); |
| 102 | leadershipService.runForLeadership(appId.name()); |
| 103 | k8sNetworkService.addListener(k8sNetworkListener); |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 104 | k8sPodService.addListener(k8sPodListener); |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 105 | |
| 106 | log.info("Started"); |
| 107 | } |
| 108 | |
| 109 | @Deactivate |
| 110 | protected void deactivate() { |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 111 | k8sPodService.removeListener(k8sPodListener); |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 112 | k8sNetworkService.removeListener(k8sNetworkListener); |
| 113 | leadershipService.withdraw(appId.name()); |
| 114 | eventExecutor.shutdown(); |
| 115 | |
| 116 | log.info("Stopped"); |
| 117 | } |
| 118 | |
| 119 | private class InternalK8sNetworkListener implements K8sNetworkListener { |
| 120 | |
| 121 | private boolean isRelevantHelper() { |
| 122 | return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| 123 | } |
| 124 | |
| 125 | @Override |
| 126 | public void event(K8sNetworkEvent event) { |
| 127 | switch (event.type()) { |
| 128 | case K8S_NETWORK_CREATED: |
| 129 | eventExecutor.execute(() -> processNetworkAddition(event)); |
| 130 | break; |
| 131 | case K8S_NETWORK_REMOVED: |
| 132 | eventExecutor.execute(() -> processNetworkRemoval(event)); |
| 133 | break; |
| 134 | default: |
| 135 | break; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | private void processNetworkAddition(K8sNetworkEvent event) { |
| 140 | if (!isRelevantHelper()) { |
| 141 | return; |
| 142 | } |
| 143 | |
| 144 | Set<IpAddress> ips = getSubnetIps(event.subject().cidr()); |
| 145 | k8sIpamAdminService.initializeIpPool(event.subject().networkId(), ips); |
| 146 | } |
| 147 | |
| 148 | private void processNetworkRemoval(K8sNetworkEvent event) { |
| 149 | if (!isRelevantHelper()) { |
| 150 | return; |
| 151 | } |
| 152 | |
| 153 | k8sIpamAdminService.purgeIpPool(event.subject().networkId()); |
| 154 | } |
| 155 | } |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 156 | |
| 157 | private class InternalK8sPodListener implements K8sPodListener { |
| 158 | |
| 159 | private boolean isRelevantHelper() { |
| 160 | return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| 161 | } |
| 162 | |
| 163 | @Override |
| 164 | public void event(K8sPodEvent event) { |
| 165 | switch (event.type()) { |
| 166 | case K8S_POD_CREATED: |
| 167 | eventExecutor.execute(() -> processPodCreation(event.subject())); |
| 168 | break; |
| 169 | case K8S_POD_REMOVED: |
| 170 | default: |
| 171 | break; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | private void processPodCreation(Pod pod) { |
| 176 | if (!isRelevantHelper()) { |
| 177 | return; |
| 178 | } |
| 179 | |
| 180 | Map<String, String> annots = pod.getMetadata().getAnnotations(); |
| 181 | |
| 182 | if (annots == null || annots.isEmpty()) { |
| 183 | return; |
| 184 | } |
| 185 | |
| 186 | String annotIp = annots.get(IP_ADDRESS); |
| 187 | String annotNetwork = annots.get(NETWORK_ID); |
| 188 | String podIp = pod.getStatus().getPodIP(); |
| 189 | |
| 190 | if (podIp == null && annotIp == null) { |
| 191 | return; |
| 192 | } |
| 193 | |
| 194 | if (annotNetwork == null) { |
| 195 | return; |
| 196 | } |
| 197 | |
| 198 | if (!StringUtils.equals(annotIp, podIp)) { |
| 199 | return; |
| 200 | } |
| 201 | |
Jian Li | 186fde5 | 2019-08-26 14:54:43 +0900 | [diff] [blame] | 202 | k8sIpamAdminService.availableIps(annotNetwork); |
| 203 | |
| 204 | int cnt = 0; |
| 205 | while ((RETRY_NUM - cnt > 0) && !containIp(annotIp, annotNetwork)) { |
| 206 | try { |
| 207 | sleep(RETRY_DELAY_MS); |
| 208 | } catch (InterruptedException e) { |
| 209 | log.error("Exception caused during checking available IP addresses"); |
| 210 | } |
| 211 | |
| 212 | cnt++; |
| 213 | } |
| 214 | |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 215 | k8sIpamAdminService.reserveIp(annotNetwork, IpAddress.valueOf(podIp)); |
| 216 | } |
Jian Li | 186fde5 | 2019-08-26 14:54:43 +0900 | [diff] [blame] | 217 | |
| 218 | private boolean containIp(String podIp, String networkId) { |
| 219 | return k8sIpamAdminService.availableIps(networkId).stream() |
| 220 | .anyMatch(i -> i.toString().equals(podIp)); |
| 221 | } |
Jian Li | 7970b71 | 2019-05-03 20:58:21 +0900 | [diff] [blame] | 222 | } |
Jian Li | 9b19916 | 2019-02-10 18:00:35 +0900 | [diff] [blame] | 223 | } |