diff --git a/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/impl/K8sNodeManager.java b/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/impl/K8sNodeManager.java
new file mode 100644
index 0000000..d80ef21
--- /dev/null
+++ b/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/impl/K8sNodeManager.java
@@ -0,0 +1,219 @@
+/*
+ * Copyright 2019-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.base.Strings;
+import com.google.common.collect.ImmutableSet;
+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.K8sNode;
+import org.onosproject.k8snode.api.K8sNode.Type;
+import org.onosproject.k8snode.api.K8sNodeAdminService;
+import org.onosproject.k8snode.api.K8sNodeEvent;
+import org.onosproject.k8snode.api.K8sNodeListener;
+import org.onosproject.k8snode.api.K8sNodeService;
+import org.onosproject.k8snode.api.K8sNodeStore;
+import org.onosproject.k8snode.api.K8sNodeStoreDelegate;
+import org.onosproject.net.DeviceId;
+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.K8sNodeState.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 nodes.
+ */
+@Component(
+        immediate = true,
+        service = { K8sNodeService.class, K8sNodeAdminService.class },
+        property = {
+                OVSDB_PORT + ":Integer=" + OVSDB_PORT_NUM_DEFAULT
+        }
+)
+public class K8sNodeManager
+        extends ListenerRegistry<K8sNodeEvent, K8sNodeListener>
+        implements K8sNodeService, K8sNodeAdminService {
+
+    private final Logger log = getLogger(getClass());
+
+    private static final String MSG_NODE = "Kubernetes 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 ERR_NULL_NODE = "Kubernetes node cannot be null";
+    private static final String ERR_NULL_HOSTNAME = "Kubernetes node hostname cannot be null";
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected K8sNodeStore 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 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 K8sNodeStoreDelegate delegate = new K8sNodeManager.InternalNodeStoreDelegate();
+
+    private ApplicationId appId;
+
+    @Activate
+    protected void activate() {
+        appId = coreService.registerApplication(APP_ID);
+        nodeStore.setDelegate(delegate);
+
+        leadershipService.runForLeadership(appId.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(K8sNode node) {
+        checkNotNull(node, ERR_NULL_NODE);
+        nodeStore.createNode(node);
+        log.info(String.format(MSG_NODE, node.hostname(), MSG_CREATED));
+    }
+
+    @Override
+    public void updateNode(K8sNode node) {
+        checkNotNull(node, ERR_NULL_NODE);
+        nodeStore.updateNode(node);
+        log.info(String.format(MSG_NODE, node.hostname(), MSG_UPDATED));
+    }
+
+    @Override
+    public K8sNode removeNode(String hostname) {
+        checkArgument(!Strings.isNullOrEmpty(hostname), ERR_NULL_HOSTNAME);
+        K8sNode node = nodeStore.removeNode(hostname);
+        log.info(String.format(MSG_NODE, hostname, MSG_REMOVED));
+        return node;
+    }
+
+    @Override
+    public Set<K8sNode> nodes() {
+        return nodeStore.nodes();
+    }
+
+    @Override
+    public Set<K8sNode> nodes(Type type) {
+        Set<K8sNode> nodes = nodeStore.nodes().stream()
+                .filter(node -> Objects.equals(node.type(), type))
+                .collect(Collectors.toSet());
+        return ImmutableSet.copyOf(nodes);
+    }
+
+    @Override
+    public Set<K8sNode> completeNodes() {
+        Set<K8sNode> nodes = nodeStore.nodes().stream()
+                .filter(node -> node.state() == COMPLETE)
+                .collect(Collectors.toSet());
+        return ImmutableSet.copyOf(nodes);
+    }
+
+    @Override
+    public Set<K8sNode> completeNodes(Type type) {
+        Set<K8sNode> nodes = nodeStore.nodes().stream()
+                .filter(node -> node.type() == type &&
+                        node.state() == COMPLETE)
+                .collect(Collectors.toSet());
+        return ImmutableSet.copyOf(nodes);
+    }
+
+    @Override
+    public K8sNode node(String hostname) {
+        return nodeStore.node(hostname);
+    }
+
+    @Override
+    public K8sNode node(DeviceId deviceId) {
+        return nodeStore.nodes().stream()
+                .filter(node -> Objects.equals(node.intgBridge(), deviceId) ||
+                        Objects.equals(node.ovsdb(), deviceId))
+                .findFirst().orElse(null);
+    }
+
+    private class InternalNodeStoreDelegate implements K8sNodeStoreDelegate {
+
+        @Override
+        public void notify(K8sNodeEvent event) {
+            if (event != null) {
+                log.trace("send kubernetes node event {}", event);
+                process(event);
+            }
+        }
+    }
+}