diff --git a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeManager.java b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeManager.java
new file mode 100644
index 0000000..6578def
--- /dev/null
+++ b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeManager.java
@@ -0,0 +1,289 @@
+/*
+ * 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;
+
+/**
+ * Service administering the inventory of kubevirt nodes.
+ */
+
+import com.google.common.base.Strings;
+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.kubevirtnode.api.KubevirtNode;
+import org.onosproject.kubevirtnode.api.KubevirtNodeAdminService;
+import org.onosproject.kubevirtnode.api.KubevirtNodeEvent;
+import org.onosproject.kubevirtnode.api.KubevirtNodeListener;
+import org.onosproject.kubevirtnode.api.KubevirtNodeService;
+import org.onosproject.kubevirtnode.api.KubevirtNodeState;
+import org.onosproject.kubevirtnode.api.KubevirtNodeStore;
+import org.onosproject.kubevirtnode.api.KubevirtNodeStoreDelegate;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.ovsdb.controller.OvsdbController;
+import org.onosproject.store.service.AtomicCounter;
+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.Optional;
+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.kubevirtnode.impl.OsgiPropertyConstants.OVSDB_PORT;
+import static org.onosproject.kubevirtnode.impl.OsgiPropertyConstants.OVSDB_PORT_NUM_DEFAULT;
+import static org.onosproject.kubevirtnode.util.KubevirtNodeUtil.genDpid;
+import static org.slf4j.LoggerFactory.getLogger;
+
+@Component(
+        immediate = true,
+        service = {KubevirtNodeService.class, KubevirtNodeAdminService.class},
+        property = {
+                OVSDB_PORT + ":Integer=" + OVSDB_PORT_NUM_DEFAULT
+        }
+)
+public class KubevirtNodeManager
+        extends ListenerRegistry<KubevirtNodeEvent, KubevirtNodeListener>
+        implements KubevirtNodeService, KubevirtNodeAdminService {
+
+    private final Logger log = getLogger(getClass());
+
+    private static final String MSG_NODE = "KubeVirt node %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 DEVICE_ID_COUNTER_NAME = "device-id-counter";
+
+    private static final String ERR_NULL_NODE = "KubeVirt node cannot be null";
+    private static final String ERR_NULL_HOSTNAME = "KubeVirt node hostname cannot be null";
+    private static final String ERR_NULL_DEVICE_ID = "KubeVirt node device ID cannot be null";
+
+    private static final String NOT_DUPLICATED_MSG = "% cannot be duplicated";
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected KubevirtNodeStore nodeStore;
+
+    @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 OvsdbController ovsdbController;
+
+    @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 KubevirtNodeStoreDelegate delegate = new InternalNodeStoreDelegate();
+
+    private AtomicCounter deviceIdCounter;
+
+    private ApplicationId appId;
+
+    @Activate
+    protected void activate() {
+        appId = coreService.registerApplication(APP_ID);
+        nodeStore.setDelegate(delegate);
+
+        leadershipService.runForLeadership(appId.name());
+
+        deviceIdCounter = storageService.getAtomicCounter(DEVICE_ID_COUNTER_NAME);
+
+        log.info("Started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        nodeStore.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 createNode(KubevirtNode node) {
+        checkNotNull(node, ERR_NULL_NODE);
+
+        KubevirtNode intNode;
+
+        if (node.intgBridge() == null) {
+            String deviceIdStr = genDpid(deviceIdCounter.incrementAndGet());
+            checkNotNull(deviceIdStr, ERR_NULL_DEVICE_ID);
+            intNode = node.updateIntgBridge(DeviceId.deviceId(deviceIdStr));
+            checkArgument(!hasIntgBridge(intNode.intgBridge(), intNode.hostname()),
+                    NOT_DUPLICATED_MSG, intNode.intgBridge());
+        } else {
+            intNode = node;
+            checkArgument(!hasIntgBridge(intNode.intgBridge(), intNode.hostname()),
+                    NOT_DUPLICATED_MSG, intNode.intgBridge());
+        }
+
+        nodeStore.createNode(intNode);
+
+        log.info(String.format(MSG_NODE, intNode.hostname(), MSG_CREATED));
+    }
+
+    @Override
+    public void updateNode(KubevirtNode node) {
+        checkNotNull(node, ERR_NULL_NODE);
+
+        KubevirtNode intNode;
+
+        KubevirtNode existingNode = nodeStore.node(node.hostname());
+        checkNotNull(existingNode, ERR_NULL_NODE);
+
+        DeviceId existIntgBridge = nodeStore.node(node.hostname()).intgBridge();
+
+        if (node.intgBridge() == null) {
+            intNode = node.updateIntgBridge(existIntgBridge);
+            checkArgument(!hasIntgBridge(intNode.intgBridge(), intNode.hostname()),
+                    NOT_DUPLICATED_MSG, intNode.intgBridge());
+        } else {
+            intNode = node;
+            checkArgument(!hasIntgBridge(intNode.intgBridge(), intNode.hostname()),
+                    NOT_DUPLICATED_MSG, intNode.intgBridge());
+        }
+
+        nodeStore.updateNode(intNode);
+
+        log.info(String.format(MSG_NODE, intNode.hostname(), MSG_UPDATED));
+    }
+
+    @Override
+    public KubevirtNode removeNode(String hostname) {
+        checkArgument(!Strings.isNullOrEmpty(hostname), ERR_NULL_HOSTNAME);
+        KubevirtNode node = nodeStore.removeNode(hostname);
+        log.info(String.format(MSG_NODE, hostname, MSG_REMOVED));
+        return node;
+    }
+
+    @Override
+    public Set<KubevirtNode> nodes() {
+        return nodeStore.nodes();
+    }
+
+    @Override
+    public Set<KubevirtNode> nodes(KubevirtNode.Type type) {
+        Set<KubevirtNode> nodes = nodeStore.nodes().stream()
+                .filter(node -> Objects.equals(node.type(), type))
+                .collect(Collectors.toSet());
+        return ImmutableSet.copyOf(nodes);
+    }
+
+    @Override
+    public Set<KubevirtNode> completeNodes() {
+        Set<KubevirtNode> nodes = nodeStore.nodes().stream()
+                .filter(node -> node.state() == KubevirtNodeState.COMPLETE)
+                .collect(Collectors.toSet());
+        return ImmutableSet.copyOf(nodes);
+    }
+
+    @Override
+    public Set<KubevirtNode> completeNodes(KubevirtNode.Type type) {
+        Set<KubevirtNode> nodes = nodeStore.nodes().stream()
+                .filter(node -> node.type() == type &&
+                        node.state() == KubevirtNodeState.COMPLETE)
+                .collect(Collectors.toSet());
+        return ImmutableSet.copyOf(nodes);
+    }
+
+    @Override
+    public KubevirtNode node(String hostname) {
+        return nodeStore.node(hostname);
+    }
+
+    @Override
+    public KubevirtNode node(DeviceId deviceId) {
+        return nodeStore.nodes().stream()
+                .filter(node -> Objects.equals(node.intgBridge(), deviceId) ||
+                        Objects.equals(node.ovsdb(), deviceId))
+                .findFirst().orElse(null);
+    }
+
+    @Override
+    public KubevirtNode node(IpAddress mgmtIp) {
+        return nodeStore.nodes().stream()
+                .filter(node -> Objects.equals(node.managementIp(), mgmtIp))
+                .findFirst().orElse(null);
+    }
+
+    private boolean hasIntgBridge(DeviceId deviceId, String hostname) {
+        Optional<KubevirtNode> existNode = nodeStore.nodes().stream()
+                .filter(n -> !n.hostname().equals(hostname))
+                .filter(n -> deviceId.equals(n.intgBridge()))
+                .findFirst();
+
+        return existNode.isPresent();
+    }
+
+    private class InternalNodeStoreDelegate implements KubevirtNodeStoreDelegate {
+
+        @Override
+        public void notify(KubevirtNodeEvent event) {
+            if (event != null) {
+                log.trace("send kubevirt node event {}", event);
+                process(event);
+            }
+        }
+    }
+}