Implement kubevirt floating IP's class, codec, watcher and APIs
Change-Id: I2111902e86083add8a00af62557fac1e98b7e7fc
(cherry picked from commit e48a617ccaf19d0d29ccc3211f6254be5e26826e)
diff --git a/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubevirtFloatingIpWatcher.java b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubevirtFloatingIpWatcher.java
new file mode 100644
index 0000000..d15a515
--- /dev/null
+++ b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubevirtFloatingIpWatcher.java
@@ -0,0 +1,250 @@
+/*
+ * Copyright 2021-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.kubevirtnetworking.impl;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import io.fabric8.kubernetes.client.KubernetesClient;
+import io.fabric8.kubernetes.client.Watcher;
+import io.fabric8.kubernetes.client.WatcherException;
+import io.fabric8.kubernetes.client.dsl.base.CustomResourceDefinitionContext;
+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.kubevirtnetworking.api.AbstractWatcher;
+import org.onosproject.kubevirtnetworking.api.KubevirtFloatingIp;
+import org.onosproject.kubevirtnetworking.api.KubevirtRouterAdminService;
+import org.onosproject.kubevirtnode.api.KubevirtApiConfigEvent;
+import org.onosproject.kubevirtnode.api.KubevirtApiConfigListener;
+import org.onosproject.kubevirtnode.api.KubevirtApiConfigService;
+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.io.IOException;
+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.kubevirtnetworking.api.Constants.KUBEVIRT_NETWORKING_APP_ID;
+import static org.onosproject.kubevirtnetworking.util.KubevirtNetworkingUtil.k8sClient;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Kubevirt floating IP watcher used for feeding kubevirt floating IP information.
+ */
+@Component(immediate = true)
+public class KubevirtFloatingIpWatcher extends AbstractWatcher {
+
+ private final Logger log = getLogger(getClass());
+
+ @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 KubevirtRouterAdminService adminService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected KubevirtApiConfigService configService;
+
+ private final ExecutorService eventExecutor = newSingleThreadExecutor(
+ groupedThreads(this.getClass().getSimpleName(), "event-handler"));
+
+ private final InternalFloatingIpWatcher watcher = new InternalFloatingIpWatcher();
+ private final InternalKubevirtApiConfigListener configListener =
+ new InternalKubevirtApiConfigListener();
+
+ CustomResourceDefinitionContext fipCrdCxt = new CustomResourceDefinitionContext
+ .Builder()
+ .withGroup("kubevirt.io")
+ .withScope("Cluster")
+ .withVersion("v1")
+ .withPlural("floatingips")
+ .build();
+
+ private ApplicationId appId;
+ private NodeId localNodeId;
+
+ @Activate
+ protected void activate() {
+ appId = coreService.registerApplication(KUBEVIRT_NETWORKING_APP_ID);
+ localNodeId = clusterService.getLocalNode().id();
+ leadershipService.runForLeadership(appId.name());
+ configService.addListener(configListener);
+
+ log.info("Started");
+ }
+
+ @Deactivate
+ protected void deactivate() {
+ configService.removeListener(configListener);
+ leadershipService.withdraw(appId.name());
+ eventExecutor.shutdown();
+
+ log.info("Stopped");
+ }
+
+ private void instantiateWatcher() {
+ KubernetesClient client = k8sClient(configService);
+
+ if (client != null) {
+ try {
+ client.customResource(fipCrdCxt).watch(watcher);
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ }
+ }
+
+ private KubevirtFloatingIp parseKubevirtFloatingIp(String resource) {
+ try {
+ ObjectMapper mapper = new ObjectMapper();
+ JsonNode json = mapper.readTree(resource);
+ ObjectNode spec = (ObjectNode) json.get("spec");
+ return codec(KubevirtFloatingIp.class).decode(spec, this);
+ } catch (IOException e) {
+ log.error("Failed to parse kubevirt floating IP object");
+ }
+
+ return null;
+ }
+
+ private class InternalKubevirtApiConfigListener implements KubevirtApiConfigListener {
+
+ private boolean isRelevantHelper() {
+ return Objects.equals(localNodeId, leadershipService.getLeader(appId.name()));
+ }
+
+ @Override
+ public void event(KubevirtApiConfigEvent event) {
+
+ switch (event.type()) {
+ case KUBEVIRT_API_CONFIG_UPDATED:
+ eventExecutor.execute(this::processConfigUpdate);
+ break;
+ case KUBEVIRT_API_CONFIG_CREATED:
+ case KUBEVIRT_API_CONFIG_REMOVED:
+ default:
+ // do nothing
+ break;
+ }
+ }
+
+ private void processConfigUpdate() {
+ if (!isRelevantHelper()) {
+ return;
+ }
+
+ instantiateWatcher();
+ }
+ }
+
+ private class InternalFloatingIpWatcher implements Watcher<String> {
+
+ @Override
+ public void eventReceived(Action action, String resource) {
+ switch (action) {
+ case ADDED:
+ eventExecutor.execute(() -> processAddition(resource));
+ break;
+ case MODIFIED:
+ eventExecutor.execute(() -> processModification(resource));
+ break;
+ case DELETED:
+ eventExecutor.execute(() -> processDeletion(resource));
+ break;
+ case ERROR:
+ log.warn("Failures processing floating IP manipulation.");
+ break;
+ default:
+ // do nothing
+ break;
+ }
+ }
+
+ @Override
+ public void onClose(WatcherException e) {
+
+ }
+
+ private void processAddition(String resource) {
+ if (!isMaster()) {
+ return;
+ }
+
+ KubevirtFloatingIp fip = parseKubevirtFloatingIp(resource);
+
+ if (fip != null) {
+ log.trace("Process Floating IP {} creating event from API server.", fip.floatingIp());
+
+ if (adminService.floatingIp(fip.id()) == null) {
+ adminService.createFloatingIp(fip);
+ }
+ }
+ }
+
+ private void processModification(String resource) {
+ if (!isMaster()) {
+ return;
+ }
+
+ KubevirtFloatingIp fip = parseKubevirtFloatingIp(resource);
+
+ if (fip != null) {
+ log.trace("Process Floating IP {} updating event from API server.", fip.floatingIp());
+
+ if (adminService.floatingIp(fip.id()) != null) {
+ adminService.updateFloatingIp(fip);
+ }
+ }
+ }
+
+ private void processDeletion(String resource) {
+ if (!isMaster()) {
+ return;
+ }
+
+ KubevirtFloatingIp fip = parseKubevirtFloatingIp(resource);
+
+ if (fip != null) {
+ log.trace("Process floating IP {} removal event from API server.", fip.floatingIp());
+
+ adminService.removeFloatingIp(fip.id());
+ }
+ }
+
+ private boolean isMaster() {
+ return Objects.equals(localNodeId, leadershipService.getLeader(appId.name()));
+ }
+ }
+}