Generate kubevirt network from NetworkAttachmentDefinition CRD
Change-Id: Id16d2a8471b75500e968a96b5597a22a9972e0b0
diff --git a/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/NetworkAttachmentDefinitionWatcher.java b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/NetworkAttachmentDefinitionWatcher.java
new file mode 100644
index 0000000..291db11
--- /dev/null
+++ b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/NetworkAttachmentDefinitionWatcher.java
@@ -0,0 +1,297 @@
+/*
+ * 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 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.json.JSONException;
+import org.json.JSONObject;
+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.kubevirtnetworking.api.DefaultKubevirtNetwork;
+import org.onosproject.kubevirtnetworking.api.KubevirtIpPool;
+import org.onosproject.kubevirtnetworking.api.KubevirtNetwork;
+import org.onosproject.kubevirtnetworking.api.KubevirtNetwork.Type;
+import org.onosproject.kubevirtnetworking.api.KubevirtNetworkAdminService;
+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.api.KubevirtNetwork.Type.FLAT;
+import static org.onosproject.kubevirtnetworking.util.KubevirtNetworkingUtil.k8sClient;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Kubernetes network-attachment-definition watcher used for feeding kubevirt network information.
+ */
+@Component(immediate = true)
+public class NetworkAttachmentDefinitionWatcher {
+
+ private final Logger log = getLogger(getClass());
+
+ private static final String NETWORK_CONFIG = "network-config";
+ private static final String TYPE = "type";
+ private static final String MTU = "mtu";
+ private static final String SEGMENT_ID = "segmentId";
+ private static final String GATEWAY_IP = "gatewayIp";
+ private static final String CIDR = "cidr";
+ private static final String HOST_ROUTES = "hostRoutes";
+ private static final String IP_POOL = "ipPool";
+ private static final String START = "start";
+ private static final String END = "end";
+
+ @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 KubevirtNetworkAdminService adminService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected KubevirtApiConfigService configService;
+
+ private final ExecutorService eventExecutor = newSingleThreadExecutor(
+ groupedThreads(this.getClass().getSimpleName(), "event-handler"));
+
+ private final InternalNetworkAttachmentDefinitionWatcher
+ watcher = new InternalNetworkAttachmentDefinitionWatcher();
+ private final InternalKubevirtApiConfigListener
+ configListener = new InternalKubevirtApiConfigListener();
+
+ CustomResourceDefinitionContext nadCrdCxt = new CustomResourceDefinitionContext
+ .Builder()
+ .withGroup("k8s.cni.cncf.io")
+ .withScope("Namespaced")
+ .withVersion("v1")
+ .withPlural("network-attachment-definitions")
+ .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 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;
+ }
+
+ KubernetesClient client = k8sClient(configService);
+
+ if (client != null) {
+ try {
+ client.customResource(nadCrdCxt).watch(watcher);
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ }
+ }
+ }
+
+ private class InternalNetworkAttachmentDefinitionWatcher
+ 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 network-attachment-definition manipulation.");
+ break;
+ default:
+ break;
+ }
+ }
+
+ @Override
+ public void onClose(WatcherException e) {
+ log.warn("Network-attachment-definition watcher OnClose", e);
+ }
+
+ private void processAddition(String resource) {
+ if (!isMaster()) {
+ return;
+ }
+
+ String name = parseName(resource);
+
+ log.trace("Process NetworkAttachmentDefinition {} creating event from API server.",
+ name);
+
+ KubevirtNetwork network = parseKubevirtNetwork(resource);
+ if (network != null) {
+ adminService.createNetwork(network);
+ }
+ }
+
+ private void processModification(String resource) {
+ if (!isMaster()) {
+ return;
+ }
+
+ String name = parseName(resource);
+
+ log.trace("Process NetworkAttachmentDefinition {} updating event from API server.",
+ name);
+
+ KubevirtNetwork network = parseKubevirtNetwork(resource);
+ if (network != null) {
+ adminService.updateNetwork(network);
+ }
+ }
+
+ private void processDeletion(String resource) {
+ if (!isMaster()) {
+ return;
+ }
+
+ String name = parseName(resource);
+
+ log.trace("Process NetworkAttachmentDefinition {} removal event from API server.",
+ name);
+
+ adminService.removeNetwork(name);
+ }
+
+ private boolean isMaster() {
+ return Objects.equals(localNodeId, leadershipService.getLeader(appId.name()));
+ }
+
+ private String parseName(String resource) {
+ try {
+ JSONObject json = new JSONObject(resource);
+ return json.getJSONObject("metadata").getString("name");
+ } catch (JSONException e) {
+ log.error("");
+ }
+ return "";
+ }
+
+ private KubevirtNetwork parseKubevirtNetwork(String resource) {
+ try {
+ JSONObject json = new JSONObject(resource);
+ String name = parseName(resource);
+ JSONObject annots = json.getJSONObject("metadata").getJSONObject("annotations");
+ String networkConfig = annots.getString(NETWORK_CONFIG);
+ if (networkConfig != null) {
+ KubevirtNetwork.Builder builder = DefaultKubevirtNetwork.builder();
+
+ JSONObject configJson = new JSONObject(networkConfig);
+ String type = configJson.getString(TYPE);
+ Integer mtu = configJson.getInt(MTU);
+ String gatewayIp = configJson.getString(GATEWAY_IP);
+
+ if (!type.equalsIgnoreCase(FLAT.name())) {
+ builder.segmentId(configJson.getString(SEGMENT_ID));
+ }
+
+ String cidr = configJson.getString(CIDR);
+
+ JSONObject poolJson = configJson.getJSONObject(IP_POOL);
+ if (poolJson != null) {
+ String start = poolJson.getString(START);
+ String end = poolJson.getString(END);
+ builder.ipPool(new KubevirtIpPool(
+ IpAddress.valueOf(start), IpAddress.valueOf(end)));
+ }
+
+ builder.networkId(name).name(name).type(Type.valueOf(type))
+ .mtu(mtu).gatewayIp(IpAddress.valueOf(gatewayIp)).cidr(cidr);
+
+ return builder.build();
+ }
+ } catch (JSONException e) {
+ log.error("Failed to parse network attachment definition object");
+ }
+
+ return null;
+ }
+ }
+}