Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2020-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.kubevirtnode.impl; |
| 17 | |
Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 18 | import io.fabric8.kubernetes.client.KubernetesClient; |
Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 19 | import org.onosproject.cluster.ClusterService; |
| 20 | import org.onosproject.cluster.LeadershipService; |
| 21 | import org.onosproject.cluster.NodeId; |
| 22 | import org.onosproject.core.ApplicationId; |
| 23 | import org.onosproject.core.CoreService; |
Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 24 | import org.onosproject.kubevirtnode.api.KubevirtApiConfig; |
| 25 | import org.onosproject.kubevirtnode.api.KubevirtApiConfigAdminService; |
| 26 | import org.onosproject.kubevirtnode.api.KubevirtApiConfigEvent; |
| 27 | import org.onosproject.kubevirtnode.api.KubevirtApiConfigListener; |
Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 28 | import org.onosproject.kubevirtnode.api.KubevirtNodeAdminService; |
Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 29 | import org.osgi.service.component.annotations.Activate; |
| 30 | import org.osgi.service.component.annotations.Component; |
| 31 | import org.osgi.service.component.annotations.Deactivate; |
| 32 | import org.osgi.service.component.annotations.Reference; |
| 33 | import org.osgi.service.component.annotations.ReferenceCardinality; |
| 34 | import org.slf4j.Logger; |
| 35 | |
| 36 | import java.util.Objects; |
| 37 | import java.util.concurrent.ExecutorService; |
| 38 | |
| 39 | import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| 40 | import static org.onlab.util.Tools.groupedThreads; |
| 41 | import static org.onosproject.kubevirtnode.api.KubevirtApiConfig.State.CONNECTED; |
| 42 | import static org.onosproject.kubevirtnode.api.KubevirtApiConfigService.APP_ID; |
Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 43 | import static org.onosproject.kubevirtnode.util.KubevirtNodeUtil.k8sClient; |
| 44 | import static org.slf4j.LoggerFactory.getLogger; |
| 45 | |
| 46 | /** |
| 47 | * Handles the state of KubeVirt API server configuration. |
| 48 | */ |
| 49 | @Component(immediate = true) |
| 50 | public class DefaultKubevirtApiConfigHandler { |
| 51 | |
| 52 | private final Logger log = getLogger(getClass()); |
| 53 | |
Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 54 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 55 | protected CoreService coreService; |
| 56 | |
| 57 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 58 | protected LeadershipService leadershipService; |
| 59 | |
| 60 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 61 | protected ClusterService clusterService; |
| 62 | |
| 63 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 64 | protected KubevirtApiConfigAdminService configAdminService; |
| 65 | |
| 66 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 67 | protected KubevirtNodeAdminService nodeAdminService; |
| 68 | |
| 69 | private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| 70 | groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| 71 | |
| 72 | private final KubevirtApiConfigListener configListener = new InternalKubevirtApiConfigListener(); |
| 73 | |
| 74 | private ApplicationId appId; |
| 75 | private NodeId localNode; |
| 76 | |
| 77 | @Activate |
| 78 | protected void activate() { |
| 79 | appId = coreService.getAppId(APP_ID); |
| 80 | localNode = clusterService.getLocalNode().id(); |
| 81 | leadershipService.runForLeadership(appId.name()); |
| 82 | configAdminService.addListener(configListener); |
| 83 | |
| 84 | log.info("Started"); |
| 85 | } |
| 86 | |
| 87 | @Deactivate |
| 88 | protected void deactivate() { |
| 89 | configAdminService.removeListener(configListener); |
| 90 | leadershipService.withdraw(appId.name()); |
| 91 | eventExecutor.shutdown(); |
| 92 | |
| 93 | log.info("Stopped"); |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Checks the validity of the given kubernetes API server configuration. |
| 98 | * |
| 99 | * @param config kubernetes API server configuration |
| 100 | * @return validity result |
| 101 | */ |
| 102 | private boolean checkApiServerConfig(KubevirtApiConfig config) { |
| 103 | KubernetesClient k8sClient = k8sClient(config); |
| 104 | return k8sClient != null && k8sClient.getApiVersion() != null; |
| 105 | } |
| 106 | |
Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 107 | private class InternalKubevirtApiConfigListener implements KubevirtApiConfigListener { |
| 108 | |
| 109 | private boolean isRelevantHelper() { |
| 110 | return Objects.equals(localNode, leadershipService.getLeader(appId.name())); |
| 111 | } |
| 112 | |
| 113 | @Override |
| 114 | public void event(KubevirtApiConfigEvent event) { |
| 115 | switch (event.type()) { |
| 116 | case KUBEVIRT_API_CONFIG_CREATED: |
| 117 | eventExecutor.execute(() -> processConfigCreation(event.subject())); |
| 118 | break; |
| 119 | default: |
| 120 | break; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | private void processConfigCreation(KubevirtApiConfig config) { |
| 125 | if (!isRelevantHelper()) { |
| 126 | return; |
| 127 | } |
| 128 | |
| 129 | if (checkApiServerConfig(config)) { |
| 130 | KubevirtApiConfig newConfig = config.updateState(CONNECTED); |
| 131 | configAdminService.updateApiConfig(newConfig); |
Jian Li | aaf44b5 | 2020-12-27 23:22:46 +0900 | [diff] [blame] | 132 | } |
| 133 | } |
| 134 | } |
| 135 | } |