Initial support for multi kubernetes clusters for k8s nodes
Change-Id: I6ca132898f8e157e0583de38a637fdc135f21d6f
(cherry picked from commit e2a04cedde73618ef24575e70cb221e03854de1d)
diff --git a/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/impl/K8sHostManager.java b/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/impl/K8sHostManager.java
new file mode 100644
index 0000000..fd26763
--- /dev/null
+++ b/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/impl/K8sHostManager.java
@@ -0,0 +1,199 @@
+/*
+ * 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.k8snode.impl;
+
+import com.google.common.collect.ImmutableSet;
+import org.onlab.packet.IpAddress;
+import org.onlab.util.Tools;
+import org.onosproject.cluster.ClusterService;
+import org.onosproject.cluster.LeadershipService;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.event.ListenerRegistry;
+import org.onosproject.k8snode.api.K8sHost;
+import org.onosproject.k8snode.api.K8sHostAdminService;
+import org.onosproject.k8snode.api.K8sHostEvent;
+import org.onosproject.k8snode.api.K8sHostListener;
+import org.onosproject.k8snode.api.K8sHostService;
+import org.onosproject.k8snode.api.K8sHostStore;
+import org.onosproject.k8snode.api.K8sHostStoreDelegate;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.store.service.StorageService;
+import org.osgi.service.component.ComponentContext;
+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.Modified;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
+import org.slf4j.Logger;
+
+import java.util.Dictionary;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+import java.util.stream.Collectors;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+import static java.util.concurrent.Executors.newSingleThreadExecutor;
+import static org.onlab.util.Tools.groupedThreads;
+import static org.onosproject.k8snode.api.K8sHostState.COMPLETE;
+import static org.onosproject.k8snode.impl.OsgiPropertyConstants.OVSDB_PORT;
+import static org.onosproject.k8snode.impl.OsgiPropertyConstants.OVSDB_PORT_NUM_DEFAULT;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Service administering the inventory of kubernetes hosts.
+ */
+@Component(
+ immediate = true,
+ service = {K8sHostService.class, K8sHostAdminService.class},
+ property = {
+ OVSDB_PORT + ":Integer=" + OVSDB_PORT_NUM_DEFAULT
+ }
+)
+public class K8sHostManager
+ extends ListenerRegistry<K8sHostEvent, K8sHostListener>
+ implements K8sHostService, K8sHostAdminService {
+
+ private final Logger log = getLogger(getClass());
+
+ private static final String MSG_HOST = "Kubernetes host %s %s";
+ private static final String MSG_CREATED = "created";
+ private static final String MSG_UPDATED = "updated";
+ private static final String MSG_REMOVED = "removed";
+
+ private static final String ERR_NULL_HOST = "Kubernetes host cannot be null";
+ private static final String ERR_NULL_HOST_IP = "Kubernetes host IP cannot be null";
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected K8sHostStore hostStore;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected CoreService coreService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected ClusterService clusterService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected LeadershipService leadershipService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected StorageService storageService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected DeviceService deviceService;
+
+ /** OVSDB server listen port. */
+ private int ovsdbPortNum = OVSDB_PORT_NUM_DEFAULT;
+
+ private final ExecutorService eventExecutor = newSingleThreadExecutor(
+ groupedThreads(this.getClass().getSimpleName(), "event-handler", log));
+
+ private final K8sHostStoreDelegate delegate = new K8sHostManager.InternalHostStoreDelegate();
+
+ private ApplicationId appId;
+
+ @Activate
+ protected void activate() {
+ appId = coreService.registerApplication(APP_ID);
+ hostStore.setDelegate(delegate);
+
+ leadershipService.runForLeadership(appId.name());
+ log.info("Started");
+ }
+
+ @Deactivate
+ protected void deactivate() {
+ hostStore.unsetDelegate(delegate);
+
+ leadershipService.withdraw(appId.name());
+ eventExecutor.shutdown();
+
+ log.info("Stopped");
+ }
+
+ @Modified
+ protected void modified(ComponentContext context) {
+ Dictionary<?, ?> properties = context.getProperties();
+ int updatedOvsdbPort = Tools.getIntegerProperty(properties, OVSDB_PORT);
+ if (!Objects.equals(updatedOvsdbPort, ovsdbPortNum)) {
+ ovsdbPortNum = updatedOvsdbPort;
+ }
+
+ log.info("Modified");
+ }
+
+ @Override
+ public void createHost(K8sHost host) {
+ checkNotNull(host, ERR_NULL_HOST);
+
+ hostStore.createHost(host);
+
+ log.info(String.format(MSG_HOST, host.hostIp().toString(), MSG_CREATED));
+ }
+
+ @Override
+ public void updateHost(K8sHost host) {
+ checkNotNull(host, ERR_NULL_HOST);
+
+ hostStore.updateHost(host);
+
+ log.info(String.format(MSG_HOST, host.hostIp().toString(), MSG_UPDATED));
+ }
+
+ @Override
+ public K8sHost removeHost(IpAddress hostIp) {
+ checkArgument(hostIp != null, ERR_NULL_HOST_IP);
+
+ K8sHost host = hostStore.removeHost(hostIp);
+ log.info(String.format(MSG_HOST, hostIp.toString(), MSG_REMOVED));
+
+ return host;
+ }
+
+ @Override
+ public Set<K8sHost> hosts() {
+ return hostStore.hosts();
+ }
+
+ @Override
+ public Set<K8sHost> completeHosts() {
+ Set<K8sHost> hosts = hostStore.hosts().stream()
+ .filter(h -> Objects.equals(h.state(), COMPLETE))
+ .collect(Collectors.toSet());
+ return ImmutableSet.copyOf(hosts);
+ }
+
+ @Override
+ public K8sHost host(IpAddress hostIp) {
+ return hostStore.hosts().stream()
+ .filter(h -> Objects.equals(h.hostIp(), hostIp))
+ .findFirst().orElse(null);
+ }
+
+ private class InternalHostStoreDelegate implements K8sHostStoreDelegate {
+
+ @Override
+ public void notify(K8sHostEvent event) {
+ if (event != null) {
+ log.trace("send kubernetes host event {}", event);
+ process(event);
+ }
+ }
+ }
+}