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);
+            }
+        }
+    }
+}