| /* |
| * Copyright 2020-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.kubevirtnode.impl; |
| |
| import io.fabric8.kubernetes.client.KubernetesClient; |
| 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.kubevirtnode.api.KubevirtApiConfig; |
| import org.onosproject.kubevirtnode.api.KubevirtApiConfigAdminService; |
| import org.onosproject.kubevirtnode.api.KubevirtApiConfigEvent; |
| import org.onosproject.kubevirtnode.api.KubevirtApiConfigListener; |
| import org.onosproject.kubevirtnode.api.KubevirtNodeAdminService; |
| 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.kubevirtnode.api.KubevirtApiConfig.State.CONNECTED; |
| import static org.onosproject.kubevirtnode.api.KubevirtApiConfigService.APP_ID; |
| import static org.onosproject.kubevirtnode.util.KubevirtNodeUtil.k8sClient; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Handles the state of KubeVirt API server configuration. |
| */ |
| @Component(immediate = true) |
| public class DefaultKubevirtApiConfigHandler { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private static final long SLEEP_MS = 10000; // we wait 10s |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected LeadershipService leadershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected KubevirtApiConfigAdminService configAdminService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected KubevirtNodeAdminService nodeAdminService; |
| |
| private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| |
| private final KubevirtApiConfigListener configListener = new InternalKubevirtApiConfigListener(); |
| |
| private ApplicationId appId; |
| private NodeId localNode; |
| |
| @Activate |
| protected void activate() { |
| appId = coreService.getAppId(APP_ID); |
| localNode = clusterService.getLocalNode().id(); |
| leadershipService.runForLeadership(appId.name()); |
| configAdminService.addListener(configListener); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| configAdminService.removeListener(configListener); |
| leadershipService.withdraw(appId.name()); |
| eventExecutor.shutdown(); |
| |
| log.info("Stopped"); |
| } |
| |
| /** |
| * Checks the validity of the given kubernetes API server configuration. |
| * |
| * @param config kubernetes API server configuration |
| * @return validity result |
| */ |
| private boolean checkApiServerConfig(KubevirtApiConfig config) { |
| KubernetesClient k8sClient = k8sClient(config); |
| return k8sClient != null && k8sClient.getApiVersion() != null; |
| } |
| |
| private class InternalKubevirtApiConfigListener implements KubevirtApiConfigListener { |
| |
| private boolean isRelevantHelper() { |
| return Objects.equals(localNode, leadershipService.getLeader(appId.name())); |
| } |
| |
| @Override |
| public void event(KubevirtApiConfigEvent event) { |
| switch (event.type()) { |
| case KUBEVIRT_API_CONFIG_CREATED: |
| eventExecutor.execute(() -> processConfigCreation(event.subject())); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| private void processConfigCreation(KubevirtApiConfig config) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| |
| if (checkApiServerConfig(config)) { |
| KubevirtApiConfig newConfig = config.updateState(CONNECTED); |
| configAdminService.updateApiConfig(newConfig); |
| } |
| } |
| } |
| } |