| /* |
| * 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 io.fabric8.kubernetes.api.model.Pod; |
| import org.apache.commons.lang.StringUtils; |
| import org.onlab.packet.IpAddress; |
| 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.K8sIpamAdminService; |
| import org.onosproject.k8snetworking.api.K8sNetworkEvent; |
| import org.onosproject.k8snetworking.api.K8sNetworkListener; |
| import org.onosproject.k8snetworking.api.K8sNetworkService; |
| import org.onosproject.k8snetworking.api.K8sPodEvent; |
| import org.onosproject.k8snetworking.api.K8sPodListener; |
| import org.onosproject.k8snetworking.api.K8sPodService; |
| import org.onosproject.mastership.MastershipService; |
| 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.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| 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.K8S_NETWORKING_APP_ID; |
| import static org.onosproject.k8snetworking.util.K8sNetworkingUtil.getSubnetIps; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Initializes and purges the kubernetes IPAM. |
| */ |
| @Component(immediate = true) |
| public class K8sIpamHandler { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private static final String IP_ADDRESS = "ipAddress"; |
| private static final String NETWORK_ID = "networkId"; |
| |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected MastershipService mastershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected LeadershipService leadershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected K8sNetworkService k8sNetworkService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected K8sPodService k8sPodService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected K8sIpamAdminService k8sIpamAdminService; |
| |
| private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler")); |
| private final InternalK8sNetworkListener k8sNetworkListener = |
| new InternalK8sNetworkListener(); |
| private final InternalK8sPodListener k8sPodListener = |
| new InternalK8sPodListener(); |
| |
| private ApplicationId appId; |
| private NodeId localNodeId; |
| |
| @Activate |
| protected void activate() { |
| appId = coreService.registerApplication(K8S_NETWORKING_APP_ID); |
| localNodeId = clusterService.getLocalNode().id(); |
| leadershipService.runForLeadership(appId.name()); |
| k8sNetworkService.addListener(k8sNetworkListener); |
| k8sPodService.addListener(k8sPodListener); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| k8sPodService.removeListener(k8sPodListener); |
| k8sNetworkService.removeListener(k8sNetworkListener); |
| leadershipService.withdraw(appId.name()); |
| eventExecutor.shutdown(); |
| |
| log.info("Stopped"); |
| } |
| |
| private class InternalK8sNetworkListener implements K8sNetworkListener { |
| |
| private boolean isRelevantHelper() { |
| return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| } |
| |
| @Override |
| public void event(K8sNetworkEvent event) { |
| switch (event.type()) { |
| case K8S_NETWORK_CREATED: |
| eventExecutor.execute(() -> processNetworkAddition(event)); |
| break; |
| case K8S_NETWORK_REMOVED: |
| eventExecutor.execute(() -> processNetworkRemoval(event)); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| private void processNetworkAddition(K8sNetworkEvent event) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| |
| Set<IpAddress> ips = getSubnetIps(event.subject().cidr()); |
| String networkId = event.subject().networkId(); |
| k8sIpamAdminService.initializeIpPool(networkId, ips); |
| |
| k8sPodService.pods().stream() |
| .filter(p -> p.getStatus().getPodIP() != null) |
| .filter(p -> p.getMetadata().getAnnotations() != null) |
| .filter(p -> networkId.equals(p.getMetadata() |
| .getAnnotations().get(NETWORK_ID))) |
| .forEach(p -> { |
| String podIp = p.getStatus().getPodIP(); |
| |
| // if the POD with valid IP address has not yet been |
| // added into IPAM IP pool, we will reserve that IP address |
| // for the POD |
| if (!k8sIpamAdminService.allocatedIps(networkId) |
| .contains(IpAddress.valueOf(podIp))) { |
| k8sIpamAdminService.reserveIp(networkId, IpAddress.valueOf(podIp)); |
| } |
| }); |
| } |
| |
| private void processNetworkRemoval(K8sNetworkEvent event) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| |
| k8sIpamAdminService.purgeIpPool(event.subject().networkId()); |
| } |
| } |
| |
| private class InternalK8sPodListener implements K8sPodListener { |
| |
| private boolean isRelevantHelper() { |
| return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())); |
| } |
| |
| @Override |
| public void event(K8sPodEvent event) { |
| switch (event.type()) { |
| case K8S_POD_CREATED: |
| eventExecutor.execute(() -> processPodCreation(event.subject())); |
| break; |
| case K8S_POD_REMOVED: |
| default: |
| break; |
| } |
| } |
| |
| private void processPodCreation(Pod pod) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| |
| Map<String, String> annots = pod.getMetadata().getAnnotations(); |
| |
| if (annots == null || annots.isEmpty()) { |
| return; |
| } |
| |
| String annotIp = annots.get(IP_ADDRESS); |
| String annotNetwork = annots.get(NETWORK_ID); |
| String podIp = pod.getStatus().getPodIP(); |
| |
| if (podIp == null && annotIp == null) { |
| return; |
| } |
| |
| if (annotNetwork == null) { |
| return; |
| } |
| |
| if (!StringUtils.equals(annotIp, podIp)) { |
| return; |
| } |
| |
| k8sIpamAdminService.availableIps(annotNetwork); |
| |
| // if the kubernetes network has been initialized, we may have |
| // empty available IP pool, in this case, we will postpone IP reserve |
| // process until finishing kubernetes network initialization |
| if (!containIp(annotIp, annotNetwork)) { |
| return; |
| } |
| |
| k8sIpamAdminService.reserveIp(annotNetwork, IpAddress.valueOf(podIp)); |
| } |
| |
| private boolean containIp(String podIp, String networkId) { |
| return k8sIpamAdminService.availableIps(networkId).stream() |
| .anyMatch(i -> i.toString().equals(podIp)); |
| } |
| } |
| } |