Initial commit to implement external loadbalancer for kubernetes pods.
  - Adds elb-related parameters in KubevirtNode class
  - Defines KubernetesExternalLb and related service, manager and store.

Change-Id: I68476887af493c7daeaf1dca0320218f1764653f
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubernetesExternalLb.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubernetesExternalLb.java
new file mode 100644
index 0000000..96ecf12
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/DefaultKubernetesExternalLb.java
@@ -0,0 +1,187 @@
+/*
+ * Copyright 2022-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.api;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.collect.ImmutableSet;
+
+import java.util.Objects;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+/**
+ * Default implementation of kubernetes external load balancer.
+ */
+public final class DefaultKubernetesExternalLb implements KubernetesExternalLb {
+
+    private static final String NOT_NULL_MSG = "Loadbalancer % cannot be null";
+
+    private final String serviceName;
+    private final String loadbalancerIp;
+    private final Set<Integer> nodePortSet;
+    private final Set<Integer> portSet;
+    private final Set<String> endpointSet;
+    private final String electedGateway;
+
+    public DefaultKubernetesExternalLb(String serviceName, String loadbalancerIp,
+                                       Set<Integer> nodePortSet, Set<Integer> portSet,
+                                       Set<String> endpointSet, String electedGateway) {
+        this.serviceName = serviceName;
+        this.loadbalancerIp = loadbalancerIp;
+        this.nodePortSet = nodePortSet;
+        this.portSet = portSet;
+        this.endpointSet = endpointSet;
+        this.electedGateway = electedGateway;
+    }
+
+    @Override
+    public String serviceName() {
+        return serviceName;
+    }
+
+    @Override
+    public String loadBalancerIp() {
+        return loadbalancerIp;
+    }
+
+    @Override
+    public Set<Integer> nodePortSet() {
+        return ImmutableSet.copyOf(nodePortSet);
+    }
+
+    @Override
+    public Set<Integer> portSet() {
+        return ImmutableSet.copyOf(portSet);
+    }
+
+    @Override
+    public Set<String> endpointSet() {
+        return ImmutableSet.copyOf(endpointSet);
+    }
+
+    @Override
+    public String electedGateway() {
+        return electedGateway;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+
+        DefaultKubernetesExternalLb that = (DefaultKubernetesExternalLb) o;
+        return serviceName.equals(that.serviceName) && loadbalancerIp.equals(that.loadbalancerIp) &&
+                Objects.equals(nodePortSet, that.nodePortSet) &&
+                Objects.equals(portSet, that.portSet) &&
+                Objects.equals(endpointSet, that.endpointSet) &&
+                Objects.equals(electedGateway, that.electedGateway);
+    }
+
+    @Override
+    public KubernetesExternalLb updateElectedGateway(String electedGateway) {
+        return DefaultKubernetesExternalLb.builder()
+                .serviceName(serviceName)
+                .loadBalancerIp(loadbalancerIp)
+                .nodePortSet(nodePortSet)
+                .portSet(portSet)
+                .endpointSet(endpointSet)
+                .electedGateway(electedGateway)
+                .build();
+    }
+    @Override
+    public int hashCode() {
+        return Objects.hash(serviceName, loadbalancerIp);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this)
+                .add("serviceName", serviceName)
+                .add("loadbalancerIp", loadbalancerIp)
+                .add("nodePort", nodePortSet)
+                .add("port", portSet)
+                .add("endpointSet", endpointSet)
+                .add("electedGateway", electedGateway)
+                .toString();
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public static final class Builder implements KubernetesExternalLb.Builder {
+        private String serviceName;
+        private String loadbalancerIp;
+        private Set<Integer> nodePortSet;
+        private Set<Integer> portSet;
+        private Set<String> endpointSet;
+        private String electedGateway;
+
+        private Builder() {
+        }
+
+        @Override
+        public KubernetesExternalLb build() {
+            checkArgument(serviceName != null, NOT_NULL_MSG, "serviceName");
+            checkArgument(loadbalancerIp != null, NOT_NULL_MSG, "loadbalancerIp");
+            checkArgument(!nodePortSet.isEmpty(), NOT_NULL_MSG, "nodePortSet");
+            checkArgument(!portSet.isEmpty(), NOT_NULL_MSG, "portSet");
+
+            return new DefaultKubernetesExternalLb(serviceName, loadbalancerIp,
+                    nodePortSet, portSet, endpointSet, electedGateway);
+        }
+
+        @Override
+        public Builder serviceName(String serviceName) {
+            this.serviceName = serviceName;
+            return this;
+        }
+
+        @Override
+        public Builder loadBalancerIp(String loadBalancerIp) {
+            this.loadbalancerIp = loadBalancerIp;
+            return this;
+        }
+
+        @Override
+        public Builder nodePortSet(Set<Integer> nodePortSet) {
+            this.nodePortSet = nodePortSet;
+            return this;
+        }
+
+        @Override
+        public Builder portSet(Set<Integer> portSet) {
+            this.portSet = portSet;
+            return this;
+        }
+
+        @Override
+        public Builder endpointSet(Set<String> endpointSet) {
+            this.endpointSet = endpointSet;
+            return this;
+        }
+
+        public Builder electedGateway(String electedGateway) {
+            this.electedGateway = electedGateway;
+            return this;
+        }
+    }
+}
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLb.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLb.java
new file mode 100644
index 0000000..bc754db
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLb.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2022-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.api;
+
+import java.util.Set;
+
+/**
+ * Representation of kubernetes external load balancer.
+ */
+public interface KubernetesExternalLb {
+    /**
+     * Returns the service name.
+     *
+     * @return service name
+     */
+    String serviceName();
+
+    /**
+     * Returns the load balancer IP.
+     *
+     * @return load balancer IP
+     */
+    String loadBalancerIp();
+
+    /**
+     * Returns the set of node port.
+     *
+     * @return node port
+     */
+    Set<Integer> nodePortSet();
+
+    /**
+     * Returns the set of port.
+     *
+     * @return port number
+     */
+    Set<Integer> portSet();
+
+    /**
+     * Returns the set of endpoint.
+     *
+     * @return endpoint set
+     */
+    Set<String> endpointSet();
+
+    /**
+     * Returns the elected gateway node for this service.
+     *
+     * @return gateway node hostname
+     */
+    String electedGateway();
+
+    /**
+     * Updates the elected gateway node host name.
+     *
+     * @param electedGateway updated elected gateway node hostname
+     * @return kubernetes external lb with the updated gateway node hostname
+     */
+    KubernetesExternalLb updateElectedGateway(String electedGateway);
+
+    interface Builder {
+        /**
+         * Builds an immutable kubernetes external load balancer instance.
+         *
+         * @return kubernetes external load balancer
+         */
+        KubernetesExternalLb build();
+
+        /**
+         * Returns kubernetes external load balancer builder with supplied service name.
+         *
+         * @param serviceName external load balancer service name
+         * @return external load balancer builder
+         */
+        Builder serviceName(String serviceName);
+
+        /**
+         * Returns kubernetes external load balancer builder with supplied load balancer Ip.
+         *
+         * @param loadBalancerIp external load balancer Ip
+         * @return external load balancer builder
+         */
+        Builder loadBalancerIp(String loadBalancerIp);
+
+        /**
+         * Returns kubernetes external load balancer builder with supplied node port set.
+         *
+         * @param nodePortSet node port set
+         * @return external load balancer builder
+         */
+        Builder nodePortSet(Set<Integer> nodePortSet);
+
+        /**
+         * Returns kubernetes external load balancer builder with supplied port set.
+         *
+         * @param portSet port set
+         * @return external load balancer builder
+         */
+        Builder portSet(Set<Integer> portSet);
+
+        /**
+         * Returns kubernetes external load balancer builder with supplied endpoint set.
+         *
+         * @param endpointSet endpoint set
+         * @return external load balancer builder
+         */
+        Builder endpointSet(Set<String> endpointSet);
+
+        /**
+         * Returns kubernetes external load balancer builder with supplied elected gateway.
+         *
+         * @param gateway gateway node hostname
+         * @return gateway node hostname
+         */
+        Builder electedGateway(String gateway);
+    }
+}
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbAdminService.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbAdminService.java
new file mode 100644
index 0000000..c53d409
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbAdminService.java
@@ -0,0 +1,47 @@
+/*
+ * 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.api;
+
+/**
+ * Service for administering the inventory of kubernetes external lb service.
+ */
+public interface KubernetesExternalLbAdminService extends KubernetesExternalLbService {
+    /**
+     * Create a kubernetes external load balancer with the given information.
+     *
+     * @param externalLb a new load balancer
+     */
+    void createExternalLb(KubernetesExternalLb externalLb);
+
+    /**
+     * Update a kubernetes external load balancer with the given information.
+     *
+     * @param externalLb the updated load balancer
+     */
+    void updateExternalLb(KubernetesExternalLb externalLb);
+
+    /**
+     * Removes the load balancer.
+     *
+     * @param serviceName load balancer name
+     */
+    void removeExternalLb(String serviceName);
+
+    /**
+     * Removes all load balancers.
+     */
+    void clear();
+}
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbEvent.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbEvent.java
new file mode 100644
index 0000000..15f3905
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbEvent.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2022-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.api;
+
+import org.onosproject.event.AbstractEvent;
+
+/**
+ * Manages inventory of kubernetes external load balancer states; not intended for direct use.
+ */
+public class KubernetesExternalLbEvent
+    extends AbstractEvent<KubernetesExternalLbEvent.Type, KubernetesExternalLb> {
+
+    public KubernetesExternalLbEvent(Type type, KubernetesExternalLb subject) {
+        super(type, subject);
+    }
+
+    /**
+     * Kubernetes external lb events.
+     */
+    public enum Type {
+        /**
+         * Signifies that a new kubevirt load balancer is created.
+         */
+        KUBERNETES_EXTERNAL_LOAD_BALANCER_CREATED,
+
+        /**
+         * Signifies that a kubevirt load balancer is removed.
+         */
+        KUBERNETES_EXTERNAL_LOAD_BALANCER_REMOVED,
+
+        /**
+         * Signifies that a kubevirt load balancer is updated.
+         */
+        KUBERNETES_EXTERNAL_LOAD_BALANCER_UPDATED,
+    }
+}
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbListener.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbListener.java
new file mode 100644
index 0000000..1a48764
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbListener.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2022-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.api;
+
+import org.onosproject.event.EventListener;
+
+/**
+ * Listener for kubernetes external lb event.
+ */
+public interface KubernetesExternalLbListener extends EventListener<KubernetesExternalLbEvent> {
+}
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbService.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbService.java
new file mode 100644
index 0000000..eeac4f2
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbService.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2022-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.api;
+
+import org.onosproject.event.ListenerService;
+
+import java.util.Set;
+
+public interface KubernetesExternalLbService
+    extends ListenerService<KubernetesExternalLbEvent, KubernetesExternalLbListener> {
+
+    /**
+     * Returns the kubernetes external lb with the supplied service name.
+     *
+     * @param serviceName service name
+     * @return kubernetes external load balancer
+     */
+    KubernetesExternalLb loadBalancer(String serviceName);
+
+    /**
+     * Returns all kubernetes external lb's registered in the service.
+     *
+     * @return set of kubernetes external lb's
+     */
+    Set<KubernetesExternalLb> loadBalancers();
+}
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbStore.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbStore.java
new file mode 100644
index 0000000..996cbf0
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbStore.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2022-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.api;
+
+import org.onosproject.store.Store;
+
+import java.util.Set;
+
+/**
+ * Manages inventory of kubernetes external load balancer states; not intended for direct use.
+ */
+public interface KubernetesExternalLbStore
+        extends Store<KubernetesExternalLbEvent, KubernetesExternalLbStoreDelegate> {
+
+    /**
+     * Creates a new kubernetes external lb.
+     *
+     * @param lb kubernetes external lb
+     */
+    void createLoadBalancer(KubernetesExternalLb lb);
+
+    /**
+     * Updates a new kubernetes external lb.
+     *
+     * @param lb kubernetes external lb
+     */
+    void updateLoadBalancer(KubernetesExternalLb lb);
+
+    /**
+     * Removes the kubernetes external lb with the given lb name.
+     *
+     * @param serviceName service name
+     * @return kubernetes external lb
+     */
+    KubernetesExternalLb removeLoadBalancer(String serviceName);
+
+    /**
+     * Returns the kubernetes external lb with the given lb name.
+     *
+     * @param serviceName service name
+     * @return kubernetes external lb
+     */
+    KubernetesExternalLb loadBalancer(String serviceName);
+
+    /**
+     * Returns all kubernetes external lbs.
+     *
+     * @return set of kubernetes external lbs
+     */
+    Set<KubernetesExternalLb> loadBalancers();
+
+    /**
+     * Removes all kubernetes external lbs.
+     */
+    void clear();
+}
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbStoreDelegate.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbStoreDelegate.java
new file mode 100644
index 0000000..a7fba41
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubernetesExternalLbStoreDelegate.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2022-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.api;
+
+import org.onosproject.store.StoreDelegate;
+
+/**
+ * Kubernetes external lb store delegate abstraction.
+ */
+public interface KubernetesExternalLbStoreDelegate extends StoreDelegate<KubernetesExternalLbEvent> {
+}
diff --git a/apps/kubevirt-networking/api/src/test/java/org/onosproject/kubevirtnetworking/api/DefaultKubernetesExternalLbTest.java b/apps/kubevirt-networking/api/src/test/java/org/onosproject/kubevirtnetworking/api/DefaultKubernetesExternalLbTest.java
new file mode 100644
index 0000000..a4a661f
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/test/java/org/onosproject/kubevirtnetworking/api/DefaultKubernetesExternalLbTest.java
@@ -0,0 +1,113 @@
+/*
+ * 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.api;
+
+import com.google.common.collect.Sets;
+import com.google.common.testing.EqualsTester;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Set;
+
+import static junit.framework.TestCase.assertEquals;
+import static org.onlab.junit.ImmutableClassChecker.assertThatClassIsImmutable;
+
+/**
+ * Unit tests for the default Kubernetes external lb class.
+ */
+public class DefaultKubernetesExternalLbTest {
+    private static final String SERVICE_NAME_1 = "service_name_1";
+    private static final String SERVICE_NAME_2 = "service_name_2";
+    private static final String LOADBALANCER_IP_1 = "1.1.1.1";
+    private static final String LOADBALANCER_IP_2 = "2.2.2.2";
+    private static final Set<Integer> NODE_PORT_SET_1 = Sets.newHashSet(Integer.valueOf(32080));
+    private static final Set<Integer> NODE_PORT_SET_2 = Sets.newHashSet(Integer.valueOf(33080));
+    private static final Set<Integer> PORT_SET_1 = Sets.newHashSet(Integer.valueOf(8080));
+    private static final Set<Integer> PORT_SET_2 = Sets.newHashSet(Integer.valueOf(9090));
+    private static final Set<String> ENDPOINT_SET_1 = Sets.newHashSet(String.valueOf("1.1.2.1"));
+    private static final Set<String> ENDPOINT_SET_2 = Sets.newHashSet(String.valueOf("1.1.2.2"));
+    private static final String ELECTED_GATEWAY_1 = "gateway1";
+    private static final String ELECTED_GATEWAY_2 = "gateway2";
+
+    private KubernetesExternalLb lb1;
+    private KubernetesExternalLb sameAsLb1;
+    private KubernetesExternalLb lb2;
+
+    /**
+     * Tests class immutability.
+     */
+    @Test
+    public void testImmutability() {
+        assertThatClassIsImmutable(DefaultKubernetesExternalLb.class);
+    }
+
+    /**
+     * Initial setup for this unit test.
+     */
+    @Before
+    public void setUp() {
+        lb1 = DefaultKubernetesExternalLb.builder()
+                .serviceName(SERVICE_NAME_1)
+                .loadBalancerIp(LOADBALANCER_IP_1)
+                .nodePortSet(NODE_PORT_SET_1)
+                .portSet(PORT_SET_1)
+                .endpointSet(ENDPOINT_SET_1)
+                .electedGateway(ELECTED_GATEWAY_1)
+                .build();
+
+        sameAsLb1 = DefaultKubernetesExternalLb.builder()
+                .serviceName(SERVICE_NAME_1)
+                .loadBalancerIp(LOADBALANCER_IP_1)
+                .nodePortSet(NODE_PORT_SET_1)
+                .portSet(PORT_SET_1)
+                .endpointSet(ENDPOINT_SET_1)
+                .electedGateway(ELECTED_GATEWAY_1)
+                .build();
+
+        lb2 = DefaultKubernetesExternalLb.builder()
+                .serviceName(SERVICE_NAME_2)
+                .loadBalancerIp(LOADBALANCER_IP_2)
+                .nodePortSet(NODE_PORT_SET_2)
+                .portSet(PORT_SET_2)
+                .endpointSet(ENDPOINT_SET_2)
+                .electedGateway(ELECTED_GATEWAY_2)
+                .build();
+    }
+
+    /**
+     * Tests object equality.
+     */
+    @Test
+    public void testEquality() {
+        new EqualsTester().addEqualityGroup(lb1, sameAsLb1)
+                .addEqualityGroup(lb2)
+                .testEquals();
+    }
+
+    /**
+     * Test object construction.
+     */
+    @Test
+    public void testConstruction() {
+        KubernetesExternalLb lb = lb1;
+
+        assertEquals(SERVICE_NAME_1, lb1.serviceName());
+        assertEquals(LOADBALANCER_IP_1, lb1.loadBalancerIp());
+        assertEquals(NODE_PORT_SET_1, lb1.nodePortSet());
+        assertEquals(PORT_SET_1, lb1.portSet());
+        assertEquals(ENDPOINT_SET_1, lb1.endpointSet());
+    }
+}
diff --git a/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/DistributedKubernetesExternalLbStore.java b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/DistributedKubernetesExternalLbStore.java
new file mode 100644
index 0000000..fce69d7
--- /dev/null
+++ b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/DistributedKubernetesExternalLbStore.java
@@ -0,0 +1,179 @@
+/*
+ * Copyright 2022-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.google.common.collect.ImmutableSet;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.kubevirtnetworking.api.DefaultKubernetesExternalLb;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLb;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLbEvent;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLbStore;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLbStoreDelegate;
+import org.onosproject.store.AbstractStore;
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.onosproject.store.service.ConsistentMap;
+import org.onosproject.store.service.MapEvent;
+import org.onosproject.store.service.MapEventListener;
+import org.onosproject.store.service.Serializer;
+import org.onosproject.store.service.StorageService;
+import org.onosproject.store.service.Versioned;
+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.util.Collection;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static java.util.concurrent.Executors.newSingleThreadExecutor;
+import static org.onlab.util.Tools.groupedThreads;
+import static org.onosproject.kubevirtnetworking.api.KubernetesExternalLbEvent.Type.KUBERNETES_EXTERNAL_LOAD_BALANCER_CREATED;
+import static org.onosproject.kubevirtnetworking.api.KubernetesExternalLbEvent.Type.KUBERNETES_EXTERNAL_LOAD_BALANCER_REMOVED;
+import static org.onosproject.kubevirtnetworking.api.KubernetesExternalLbEvent.Type.KUBERNETES_EXTERNAL_LOAD_BALANCER_UPDATED;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Implementation of kubernetes external lb store using consistent map.
+ */
+@Component(immediate = true, service = KubernetesExternalLbStore.class)
+public class DistributedKubernetesExternalLbStore
+    extends AbstractStore<KubernetesExternalLbEvent, KubernetesExternalLbStoreDelegate>
+    implements KubernetesExternalLbStore {
+
+    private final Logger log = getLogger(getClass());
+
+    private static final String ERR_NOT_FOUND = " does not exist";
+    private static final String ERR_DUPLICATE = " already exists";
+    private static final String APP_ID = "org.onosproject.kubevirtnetwork";
+
+    private static final KryoNamespace SERIALIZER_KUBERNETES_EXTERNAL_LB = KryoNamespace.newBuilder()
+            .register(KryoNamespaces.API)
+            .register(KubernetesExternalLb.class)
+            .register(DefaultKubernetesExternalLb.class)
+            .register(Collection.class)
+            .build();
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected CoreService coreService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected StorageService storageService;
+
+    private final ExecutorService eventExecutor = newSingleThreadExecutor(
+            groupedThreads(this.getClass().getSimpleName(), "event-handler", log));
+
+    private final MapEventListener<String, KubernetesExternalLb> lbMapEventListener =
+            new KubernetesExternalLbMapListener();
+
+    private ConsistentMap<String, KubernetesExternalLb> lbStore;
+
+    @Activate
+    protected void activate() {
+        ApplicationId appId = coreService.registerApplication(APP_ID);
+        lbStore = storageService.<String, KubernetesExternalLb>consistentMapBuilder()
+                .withSerializer(Serializer.using(SERIALIZER_KUBERNETES_EXTERNAL_LB))
+                .withName("kubernetes-lbstore")
+                .withApplicationId(appId)
+                .build();
+
+        lbStore.addListener(lbMapEventListener);
+        log.info("Started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        lbStore.removeListener(lbMapEventListener);
+        eventExecutor.shutdown();
+        log.info("Stopped");
+    }
+
+    @Override
+    public void createLoadBalancer(KubernetesExternalLb lb) {
+        lbStore.compute(lb.serviceName(), (seviceName, existing) -> {
+            final String error = lb.serviceName() + ERR_DUPLICATE;
+            checkArgument(existing == null, error);
+            return lb;
+        });
+    }
+
+    @Override
+    public void updateLoadBalancer(KubernetesExternalLb lb) {
+        lbStore.compute(lb.serviceName(), (seviceName, existing) -> {
+            final String error = lb.serviceName() + ERR_NOT_FOUND;
+            checkArgument(existing != null, error);
+            return lb;
+        });
+    }
+
+    @Override
+    public KubernetesExternalLb removeLoadBalancer(String serviceName) {
+
+        Versioned<KubernetesExternalLb> lb = lbStore.remove(serviceName);
+
+        if (lb == null) {
+            final String error = serviceName + ERR_NOT_FOUND;
+            throw new IllegalArgumentException(error);
+        }
+        return lb.value();
+    }
+
+    @Override
+    public KubernetesExternalLb loadBalancer(String serviceName) {
+        return lbStore.asJavaMap().get(serviceName);
+    }
+
+    @Override
+    public Set<KubernetesExternalLb> loadBalancers() {
+        return  ImmutableSet.copyOf(lbStore.asJavaMap().values());
+    }
+
+    @Override
+    public void clear() {
+        lbStore.clear();
+    }
+
+    private class KubernetesExternalLbMapListener implements MapEventListener<String, KubernetesExternalLb> {
+        @Override
+        public void event(MapEvent<String, KubernetesExternalLb> event) {
+            switch (event.type()) {
+                case INSERT:
+                    eventExecutor.execute(() ->
+                            notifyDelegate(new KubernetesExternalLbEvent(
+                                    KUBERNETES_EXTERNAL_LOAD_BALANCER_CREATED, event.newValue().value())));
+                    break;
+                case UPDATE:
+                    eventExecutor.execute(() ->
+                            notifyDelegate(new KubernetesExternalLbEvent(
+                                    KUBERNETES_EXTERNAL_LOAD_BALANCER_UPDATED, event.newValue().value())));
+                    break;
+                case REMOVE:
+                    eventExecutor.execute(() ->
+                            notifyDelegate(new KubernetesExternalLbEvent(
+                                    KUBERNETES_EXTERNAL_LOAD_BALANCER_REMOVED, event.newValue().value())));
+                    break;
+                default:
+                    //do nothing
+                    break;
+            }
+        }
+    }
+}
diff --git a/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubernetesExternalLbManager.java b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubernetesExternalLbManager.java
new file mode 100644
index 0000000..e68d289
--- /dev/null
+++ b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/impl/KubernetesExternalLbManager.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2022-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.google.common.base.Strings;
+import com.google.common.collect.ImmutableSet;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.event.ListenerRegistry;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLb;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLbAdminService;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLbEvent;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLbListener;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLbService;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLbStore;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLbStoreDelegate;
+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.util.Set;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onosproject.kubevirtnetworking.api.Constants.KUBEVIRT_NETWORKING_APP_ID;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Provides implementation of administrating and interfacing kubernetes external lb.
+ */
+@Component(
+        immediate = true,
+        service = {KubernetesExternalLbAdminService.class, KubernetesExternalLbService.class}
+)
+public class KubernetesExternalLbManager
+        extends ListenerRegistry<KubernetesExternalLbEvent, KubernetesExternalLbListener>
+        implements KubernetesExternalLbAdminService, KubernetesExternalLbService {
+
+    protected final Logger log = getLogger(getClass());
+
+    private static final String MSG_LOAD_BALANCER = "Kubernetes external lb %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_LOAD_BALANCER = "Kubernetes external lb cannot be null";
+    private static final String ERR_NULL_LOAD_BALANCER_NAME = "Kubernetes external lb name cannot be null";
+    private static final String ERR_IN_USE = " still in use";
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected CoreService coreService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected KubernetesExternalLbStore lbStore;
+
+    private final InternalKubernetesExternalLbStorageDelegate delegate =
+            new InternalKubernetesExternalLbStorageDelegate();
+
+    private ApplicationId appId;
+
+    @Activate
+    protected void activate() {
+        appId = coreService.registerApplication(KUBEVIRT_NETWORKING_APP_ID);
+
+        lbStore.setDelegate(delegate);
+        log.info("Started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        lbStore.unsetDelegate(delegate);
+        log.info("Stopped");
+    }
+
+    @Override
+    public void createExternalLb(KubernetesExternalLb externalLb) {
+        checkNotNull(externalLb, ERR_NULL_LOAD_BALANCER);
+        checkArgument(!Strings.isNullOrEmpty(externalLb.serviceName()), ERR_NULL_LOAD_BALANCER_NAME);
+
+
+        lbStore.createLoadBalancer(externalLb);
+        log.info(String.format(MSG_LOAD_BALANCER, externalLb.serviceName(), MSG_CREATED));
+
+    }
+
+    @Override
+    public void updateExternalLb(KubernetesExternalLb externalLb) {
+        checkNotNull(externalLb, ERR_NULL_LOAD_BALANCER);
+        checkArgument(!Strings.isNullOrEmpty(externalLb.serviceName()), ERR_NULL_LOAD_BALANCER_NAME);
+
+        lbStore.updateLoadBalancer(externalLb);
+        log.info(String.format(MSG_LOAD_BALANCER, externalLb.serviceName(), MSG_UPDATED));
+    }
+
+    @Override
+    public void removeExternalLb(String serviceName) {
+        checkArgument(serviceName != null, ERR_NULL_LOAD_BALANCER_NAME);
+
+        synchronized (this) {
+            KubernetesExternalLb externalLb = lbStore.removeLoadBalancer(serviceName);
+
+            if (externalLb != null) {
+                log.info(String.format(MSG_LOAD_BALANCER, externalLb.serviceName(), MSG_REMOVED));
+            }
+        }
+    }
+
+    @Override
+    public void clear() {
+        lbStore.clear();
+    }
+
+    @Override
+    public KubernetesExternalLb loadBalancer(String serviceName) {
+        checkArgument(!Strings.isNullOrEmpty(serviceName), ERR_NULL_LOAD_BALANCER_NAME);
+
+        return lbStore.loadBalancer(serviceName);
+    }
+
+    @Override
+    public Set<KubernetesExternalLb> loadBalancers() {
+        return ImmutableSet.copyOf(lbStore.loadBalancers());
+    }
+
+    private class InternalKubernetesExternalLbStorageDelegate
+            implements KubernetesExternalLbStoreDelegate {
+
+        @Override
+        public void notify(KubernetesExternalLbEvent event) {
+            log.trace("send kubernetes external lb event {}", event);
+            process(event);
+        }
+    }
+}
diff --git a/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/util/KubevirtNetworkingUtil.java b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/util/KubevirtNetworkingUtil.java
index de71f29..3496008 100644
--- a/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/util/KubevirtNetworkingUtil.java
+++ b/apps/kubevirt-networking/app/src/main/java/org/onosproject/kubevirtnetworking/util/KubevirtNetworkingUtil.java
@@ -41,6 +41,7 @@
 import org.onosproject.cfg.ConfigProperty;
 import org.onosproject.kubevirtnetworking.api.DefaultKubevirtNetwork;
 import org.onosproject.kubevirtnetworking.api.DefaultKubevirtPort;
+import org.onosproject.kubevirtnetworking.api.KubernetesExternalLb;
 import org.onosproject.kubevirtnetworking.api.KubevirtHostRoute;
 import org.onosproject.kubevirtnetworking.api.KubevirtIpPool;
 import org.onosproject.kubevirtnetworking.api.KubevirtLoadBalancer;
@@ -542,6 +543,28 @@
     }
 
     /**
+     * Returns the gateway node for the specified kubernetes external lb.
+     * Among gateways, only one gateway would act as a gateway per external lb.
+     * Currently gateway node is selected based on modulo operation with router hashcode.
+     *
+     * @param nodeService kubevirt node service
+     * @param externalLb kubernetes external lb
+     * @return elected gateway node
+     */
+    public static KubevirtNode gatewayNodeForSpecifiedService(KubevirtNodeService nodeService,
+                                                              KubernetesExternalLb externalLb) {
+        //TODO: enhance election logic for a better load balancing
+
+        int numOfGateways = nodeService.completeNodes(GATEWAY).size();
+        if (numOfGateways == 0) {
+            return null;
+        }
+
+        return (KubevirtNode) nodeService.completeNodes(GATEWAY)
+                .toArray()[externalLb.hashCode() % numOfGateways];
+    }
+
+    /**
      * Returns the mac address of the router.
      *
      * @param router kubevirt router
diff --git a/apps/kubevirt-node/api/src/main/java/org/onosproject/kubevirtnode/api/DefaultKubevirtNode.java b/apps/kubevirt-node/api/src/main/java/org/onosproject/kubevirtnode/api/DefaultKubevirtNode.java
index 45c2e6c..16f7034 100644
--- a/apps/kubevirt-node/api/src/main/java/org/onosproject/kubevirtnode/api/DefaultKubevirtNode.java
+++ b/apps/kubevirt-node/api/src/main/java/org/onosproject/kubevirtnode/api/DefaultKubevirtNode.java
@@ -19,6 +19,7 @@
 import org.apache.commons.lang.StringUtils;
 import org.onlab.osgi.DefaultServiceDirectory;
 import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
@@ -58,6 +59,10 @@
     private final KubevirtNodeState state;
     private final Collection<KubevirtPhyInterface> phyIntfs;
     private final String gatewayBridgeName;
+    private final String elbBridgeName;
+    private final IpAddress elbIp;
+    private final IpAddress elbGwIp;
+    private final MacAddress elbGwMac;
 
     /**
      * A default constructor of kubevirt node.
@@ -72,13 +77,18 @@
      * @param state             node state
      * @param phyIntfs          physical interfaces
      * @param gatewayBridgeName  gateway bridge name
+     * @param elbBridgeName     elb bridge name
+     * @param elbIp             elb IP address
+     * @param elbGwIp           elb gw IP address
+     * @param elbGwMac          elb gw MAC address
      */
     protected DefaultKubevirtNode(String clusterName, String hostname, Type type,
                                   DeviceId intgBridge, DeviceId tunBridge,
                                   IpAddress managementIp, IpAddress dataIp,
                                   KubevirtNodeState state,
                                   Collection<KubevirtPhyInterface> phyIntfs,
-                                  String gatewayBridgeName) {
+                                  String gatewayBridgeName, String elbBridgeName, IpAddress elbIp,
+                                  IpAddress elbGwIp, MacAddress elbGwMac) {
         this.clusterName = clusterName;
         this.hostname = hostname;
         this.type = type;
@@ -89,6 +99,10 @@
         this.state = state;
         this.phyIntfs = phyIntfs;
         this.gatewayBridgeName = gatewayBridgeName;
+        this.elbBridgeName = elbBridgeName;
+        this.elbIp = elbIp;
+        this.elbGwIp = elbGwIp;
+        this.elbGwMac = elbGwMac;
     }
 
     @Override
@@ -149,6 +163,10 @@
                 .state(newState)
                 .phyIntfs(phyIntfs)
                 .gatewayBridgeName(gatewayBridgeName)
+                .elbBridgeName(elbBridgeName)
+                .elbIp(elbIp)
+                .elbGwIp(elbGwIp)
+                .elbGwMac(elbGwMac)
                 .build();
     }
 
@@ -165,6 +183,10 @@
                 .state(state)
                 .phyIntfs(phyIntfs)
                 .gatewayBridgeName(gatewayBridgeName)
+                .elbBridgeName(elbBridgeName)
+                .elbIp(elbIp)
+                .elbGwIp(elbGwIp)
+                .elbGwMac(elbGwMac)
                 .build();
     }
 
@@ -181,6 +203,10 @@
                 .state(state)
                 .phyIntfs(phyIntfs)
                 .gatewayBridgeName(gatewayBridgeName)
+                .elbBridgeName(elbBridgeName)
+                .elbIp(elbIp)
+                .elbGwIp(elbGwIp)
+                .elbGwMac(elbGwMac)
                 .build();
     }
 
@@ -232,6 +258,26 @@
         return gatewayBridgeName;
     }
 
+    @Override
+    public String elbBridgeName() {
+        return elbBridgeName;
+    }
+
+    @Override
+    public IpAddress elbIp() {
+        return elbIp;
+    }
+
+    @Override
+    public IpAddress elbGwIp() {
+        return elbGwIp;
+    }
+
+    @Override
+    public MacAddress elbGwMac() {
+        return elbGwMac;
+    }
+
     private PortNumber tunnelPort(String tunnelType) {
         if (dataIp == null) {
             return null;
@@ -296,7 +342,11 @@
                 .dataIp(node.dataIp())
                 .state(node.state())
                 .phyIntfs(node.phyIntfs())
-                .gatewayBridgeName(node.gatewayBridgeName());
+                .gatewayBridgeName(node.gatewayBridgeName())
+                .elbBridgeName(node.elbBridgeName())
+                .elbIp(node.elbIp())
+                .elbGwIp(node.elbGwIp())
+                .elbGwMac(node.elbGwMac());
     }
 
     @Override
@@ -336,6 +386,10 @@
                 .add("state", state)
                 .add("phyIntfs", phyIntfs)
                 .add("gatewayBridgeName", gatewayBridgeName)
+                .add("elbBridgeName", elbBridgeName)
+                .add("elbIp", elbIp)
+                .add("elbGwIp", elbGwIp)
+                .add("elbGwMac", elbGwMac)
                 .toString();
     }
 
@@ -351,6 +405,10 @@
         private KubevirtNodeState state;
         private Collection<KubevirtPhyInterface> phyIntfs;
         private String gatewayBridgeName;
+        private String elbBridgeName;
+        private IpAddress elbIp;
+        private IpAddress elbGwIp;
+        private MacAddress elbGwMac;
 
         // private constructor not intended to use from external
         private Builder() {
@@ -377,7 +435,11 @@
                     dataIp,
                     state,
                     phyIntfs,
-                    gatewayBridgeName
+                    gatewayBridgeName,
+                    elbBridgeName,
+                    elbIp,
+                    elbGwIp,
+                    elbGwMac
             );
         }
 
@@ -440,5 +502,29 @@
             this.gatewayBridgeName = gatewayBridgeName;
             return this;
         }
+
+        @Override
+        public Builder elbBridgeName(String elbBridgeName) {
+            this.elbBridgeName = elbBridgeName;
+            return this;
+        }
+
+        @Override
+        public Builder elbIp(IpAddress elbIp) {
+            this.elbIp = elbIp;
+            return this;
+        }
+
+        @Override
+        public Builder elbGwIp(IpAddress elbGwIp) {
+            this.elbGwIp = elbGwIp;
+            return this;
+        }
+
+        @Override
+        public Builder elbGwMac(MacAddress elbGwMac) {
+            this.elbGwMac = elbGwMac;
+            return this;
+        }
     }
 }
diff --git a/apps/kubevirt-node/api/src/main/java/org/onosproject/kubevirtnode/api/KubevirtNode.java b/apps/kubevirt-node/api/src/main/java/org/onosproject/kubevirtnode/api/KubevirtNode.java
index 8c4844d..0015105 100644
--- a/apps/kubevirt-node/api/src/main/java/org/onosproject/kubevirtnode/api/KubevirtNode.java
+++ b/apps/kubevirt-node/api/src/main/java/org/onosproject/kubevirtnode/api/KubevirtNode.java
@@ -16,6 +16,7 @@
 package org.onosproject.kubevirtnode.api;
 
 import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.PortNumber;
 
@@ -189,6 +190,36 @@
     String gatewayBridgeName();
 
     /**
+     *  Returns the name of the elb bridge.
+     *  Using this bridge, TEG internally communicates with data IP's in worker nodes.
+     *
+     * @return gateway bridge name
+     */
+    String elbBridgeName();
+
+    /**
+     *  Returns the internal Ip Address of TEG for kubernetes external lb purpose.
+     *
+     * @return elb ip address
+     */
+    IpAddress elbIp();
+
+    /**
+     *  Returns the gateway IP of the elb IP.
+     *
+     * @return elb gw ip address
+     */
+    IpAddress elbGwIp();
+
+    /**
+     *  Returns the mac address of the elb gw.
+     *
+     * @return elb gw mac address
+     */
+    MacAddress elbGwMac();
+
+
+    /**
      * Builder of new node entity.
      */
     interface Builder {
@@ -278,5 +309,37 @@
          * @return kubevirt node builder
          */
         KubevirtNode.Builder gatewayBridgeName(String gatewayBridgeName);
+
+        /**
+         * Returns kubevirt node builder with supplied elb bridge name.
+         *
+         * @param elbBridgeName elb bridge name
+         * @return kubevirt node builder
+         */
+        KubevirtNode.Builder elbBridgeName(String elbBridgeName);
+
+        /**
+         * Returns kubevirt node builder with supplied supplied elb Ip address.
+         *
+         * @param elbIp elb ip address
+         * @return kubevirt node builder
+         */
+        KubevirtNode.Builder elbIp(IpAddress elbIp);
+
+        /**
+         * Returns kubevirt node builder with supplied supplied elb gw Ip address.
+         *
+         * @param elbGwIp elb gw ip address
+         * @return kubevirt node builder
+         */
+        KubevirtNode.Builder elbGwIp(IpAddress elbGwIp);
+
+        /**
+         * Returns kubevirt node builder with supplied supplied elb gw MAC address.
+         *
+         * @param elbGwMac elb gw mac address
+         * @return kubevirt node builder
+         */
+        KubevirtNode.Builder elbGwMac(MacAddress elbGwMac);
     }
 }
diff --git a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/cli/KubevirtShowNodeCommand.java b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/cli/KubevirtShowNodeCommand.java
index 5884b8d..5927530 100644
--- a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/cli/KubevirtShowNodeCommand.java
+++ b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/cli/KubevirtShowNodeCommand.java
@@ -67,6 +67,7 @@
     }
 
     private void printNode(KubevirtNode node) {
+        print("node: %s", node.toString());
         print("Name: %s", node.hostname());
         print("  Type: %s", node.type());
         print("  State: %s", node.state());
@@ -82,6 +83,17 @@
             print("    Interface: %s", intf.intf());
             counter++;
         }
+
+        if (node.gatewayBridgeName() != null) {
+            print("  GatewayBridgeName: %s", node.gatewayBridgeName());
+        }
+
+        if (node.elbBridgeName() != null && node.elbIp() != null) {
+            print("  ElbBridgeName: %s", node.elbBridgeName());
+            print("  ElbIp: %s", node.elbIp().toString());
+            print("  ElbGwIp: %s", node.elbGwIp().toString());
+            print("  ElbGwMac: %s", node.elbGwMac().toString());
+        }
     }
 
     private String json(KubevirtNode node) {
diff --git a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/codec/KubevirtNodeCodec.java b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/codec/KubevirtNodeCodec.java
index f1ea1c9..ec6f6bf 100644
--- a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/codec/KubevirtNodeCodec.java
+++ b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/codec/KubevirtNodeCodec.java
@@ -19,6 +19,7 @@
 import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
 import org.onosproject.codec.CodecContext;
 import org.onosproject.codec.JsonCodec;
 import org.onosproject.kubevirtnode.api.DefaultKubevirtNode;
@@ -52,6 +53,10 @@
     private static final String STATE = "state";
     private static final String PHYSICAL_INTERFACES = "phyIntfs";
     private static final String GATEWAY_BRIDGE_NAME = "gatewayBridgeName";
+    private static final String ELB_BRIDGE_NAME = "elbBridgeName";
+    private static final String ELB_IP = "elbIp";
+    private static final String ELB_GW_IP = "elbGwIp";
+    private static final String ELB_GW_MAC = "elbGwMac";
 
     private static final String MISSING_MESSAGE = " is required in OpenstackNode";
 
@@ -96,6 +101,23 @@
             result.put(GATEWAY_BRIDGE_NAME, node.gatewayBridgeName());
         }
 
+        //serialize elb bridge and ip address if exist
+        if (node.elbBridgeName() != null) {
+            result.put(ELB_BRIDGE_NAME, node.elbBridgeName());
+        }
+
+        if (node.elbIp() != null) {
+            result.put(ELB_IP, node.elbIp().toString());
+        }
+
+        if (node.elbGwIp() != null) {
+            result.put(ELB_GW_IP, node.elbGwIp().toString());
+        }
+
+        if (node.elbGwMac() != null) {
+            result.put(ELB_GW_MAC, node.elbGwMac().toString());
+        }
+
         return result;
     }
 
@@ -151,7 +173,27 @@
             nodeBuilder.gatewayBridgeName(externalBridgeJson.asText());
         }
 
-        log.trace("node is {}", nodeBuilder.build().toString());
+        JsonNode elbBridgeJson = json.get(ELB_BRIDGE_NAME);
+        if (elbBridgeJson != null) {
+            nodeBuilder.elbBridgeName(elbBridgeJson.asText());
+        }
+
+        JsonNode elbIpJson = json.get(ELB_IP);
+        if (elbIpJson != null) {
+            nodeBuilder.elbIp(IpAddress.valueOf(elbIpJson.asText()));
+        }
+
+        JsonNode elbGwIpJson = json.get(ELB_GW_IP);
+        if (elbIpJson != null) {
+            nodeBuilder.elbGwIp(IpAddress.valueOf(elbGwIpJson.asText()));
+        }
+
+        JsonNode elbGwMacJson = json.get(ELB_GW_MAC);
+        if (elbIpJson != null) {
+            nodeBuilder.elbGwMac(MacAddress.valueOf(elbGwMacJson.asText()));
+        }
+
+        log.trace("node is {}", nodeBuilder.build());
 
         return nodeBuilder.build();
     }
diff --git a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeWatcher.java b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeWatcher.java
index 96662c4..5ff2856 100644
--- a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeWatcher.java
+++ b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/KubevirtNodeWatcher.java
@@ -185,10 +185,8 @@
                 return;
             }
 
-            log.trace("Process node {} creating event from API server.",
-                    node.getMetadata().getName());
-
             KubevirtNode kubevirtNode = buildKubevirtNode(node);
+            log.info("buildKubevirtNode: {}", kubevirtNode.toString());
             if (kubevirtNode.type() == WORKER || kubevirtNode.type() == GATEWAY) {
                 if (!kubevirtNodeAdminService.hasNode(kubevirtNode.hostname())) {
                     kubevirtNodeAdminService.createNode(kubevirtNode);
diff --git a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/util/KubevirtNodeUtil.java b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/util/KubevirtNodeUtil.java
index f857364..2589be5 100644
--- a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/util/KubevirtNodeUtil.java
+++ b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/util/KubevirtNodeUtil.java
@@ -30,6 +30,7 @@
 import com.eclipsesource.json.JsonArray;
 import com.eclipsesource.json.JsonObject;
 import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
 import org.onosproject.kubevirtnode.api.DefaultKubevirtNode;
 import org.onosproject.kubevirtnode.api.DefaultKubevirtPhyInterface;
 import org.onosproject.kubevirtnode.api.KubevirtApiConfig;
@@ -84,6 +85,11 @@
     private static final String DATA_IP_KEY = SONA_PROJECT_DOMAIN + "/data-ip";
     private static final String GATEWAY_CONFIG_KEY = SONA_PROJECT_DOMAIN + "/gateway-config";
     private static final String GATEWAY_BRIDGE_NAME = "gatewayBridgeName";
+    private static final String ELB_CONFIG_KEY = SONA_PROJECT_DOMAIN + "/elb-config";
+    private static final String ELB_BRIDGE_NAME = "elbBridgeName";
+    private static final String ELB_IP_KEY = SONA_PROJECT_DOMAIN + "/elb-ip";
+    private static final String ELB_GW_IP_KEY = SONA_PROJECT_DOMAIN + "/elb-gw-ip";
+    private static final String ELB_GW_MAC_KEY = SONA_PROJECT_DOMAIN + "/elb-gw-mac";
     private static final String NETWORK_KEY = "network";
     private static final String INTERFACE_KEY = "interface";
     private static final String PHYS_BRIDGE_ID = "physBridgeId";
@@ -386,6 +392,16 @@
         String dataIpStr = annots.get(DATA_IP_KEY);
         Set<KubevirtPhyInterface> phys = new HashSet<>();
         String gatewayBridgeName = null;
+
+        String elbConfig = annots.get(ELB_CONFIG_KEY);
+        String elbIpStr = annots.get(ELB_IP_KEY);
+        String elbGwIpStr = annots.get(ELB_GW_IP_KEY);
+        String elbGwMacStr = annots.get(ELB_GW_MAC_KEY);
+        String elbBridgeName = null;
+        IpAddress elbIp = null;
+        IpAddress elbGwIp = null;
+        MacAddress elbGwMac = null;
+
         try {
             if (physnetConfig != null) {
                 JsonArray configJson = JsonArray.readFrom(physnetConfig);
@@ -423,6 +439,20 @@
 
                 nodeType = GATEWAY;
                 gatewayBridgeName = jsonNode.get(GATEWAY_BRIDGE_NAME).asText();
+
+                if (elbConfig != null && elbIpStr != null && elbGwIpStr != null) {
+                    JsonNode elbJsonNode = new ObjectMapper().readTree(elbConfig);
+
+                    elbBridgeName = elbJsonNode.get(ELB_BRIDGE_NAME).asText();
+                    elbIp = IpAddress.valueOf(elbIpStr);
+                    elbGwIp = IpAddress.valueOf(elbGwIpStr);
+                }
+
+                if (elbGwMacStr != null) {
+                    elbGwMac = MacAddress.valueOf(elbGwMacStr);
+                } else {
+                    //TODO: add the logic that retrieves the MAC address of the elb gw ip.
+                }
             }
         } catch (JsonProcessingException e) {
             log.error("Failed to parse physnet config or gateway config object", e);
@@ -453,6 +483,10 @@
                 .state(KubevirtNodeState.ON_BOARDED)
                 .phyIntfs(phys)
                 .gatewayBridgeName(gatewayBridgeName)
+                .elbBridgeName(elbBridgeName)
+                .elbIp(elbIp)
+                .elbGwIp(elbGwIp)
+                .elbGwMac(elbGwMac)
                 .build();
     }
 
diff --git a/apps/kubevirt-node/app/src/test/java/org/onosproject/kubevirtnode/codec/KubevirtNodeCodecTest.java b/apps/kubevirt-node/app/src/test/java/org/onosproject/kubevirtnode/codec/KubevirtNodeCodecTest.java
index ae3467a..8f89152 100644
--- a/apps/kubevirt-node/app/src/test/java/org/onosproject/kubevirtnode/codec/KubevirtNodeCodecTest.java
+++ b/apps/kubevirt-node/app/src/test/java/org/onosproject/kubevirtnode/codec/KubevirtNodeCodecTest.java
@@ -23,6 +23,7 @@
 import org.junit.Before;
 import org.junit.Test;
 import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
 import org.onosproject.codec.CodecContext;
 import org.onosproject.codec.JsonCodec;
 import org.onosproject.codec.impl.CodecManager;
@@ -105,6 +106,8 @@
                 .tunBridge(DeviceId.deviceId("br-tun"))
                 .dataIp(IpAddress.valueOf("20.20.20.2"))
                 .phyIntfs(ImmutableList.of(phyIntf1, phyIntf2))
+                .elbBridgeName("elbnet")
+                .elbIp(IpAddress.valueOf("10.10.10.1"))
                 .build();
 
         ObjectNode nodeJson = kubevirtNodeCodec.encode(node, context);
@@ -163,10 +166,15 @@
                 .tunBridge(DeviceId.deviceId("br-tun"))
                 .dataIp(IpAddress.valueOf("20.20.20.2"))
                 .gatewayBridgeName("gateway")
+                .elbBridgeName("elbnet")
+                .elbIp(IpAddress.valueOf("192.168.0.2"))
+                .elbGwIp(IpAddress.valueOf("192.168.0.1"))
+                .elbGwMac(MacAddress.valueOf("AA:BB:CC:DD:EE:FF"))
                 .build();
 
         ObjectNode nodeJson = kubevirtNodeCodec.encode(node, context);
         assertThat(nodeJson, matchesKubevirtNode(node));
+
     }
 
     /**
@@ -185,6 +193,10 @@
         assertThat(node.intgBridge().toString(), is("of:00000000000000a1"));
         assertThat(node.tunBridge().toString(), is("of:00000000000000a2"));
         assertThat(node.gatewayBridgeName(), is("gateway"));
+        assertThat(node.elbBridgeName(), is("elbnet"));
+        assertThat(node.elbIp().toString(), is("192.168.0.2"));
+        assertThat(node.elbGwIp().toString(), is("192.168.0.1"));
+        assertThat(node.elbGwMac().toString(), is("AA:BB:CC:DD:EE:FF"));
     }
 
     /**
diff --git a/apps/kubevirt-node/app/src/test/resources/org/onosproject/kubevirtnode/codec/KubevirtGatewayNode.json b/apps/kubevirt-node/app/src/test/resources/org/onosproject/kubevirtnode/codec/KubevirtGatewayNode.json
index 1284fec..85a11a7 100644
--- a/apps/kubevirt-node/app/src/test/resources/org/onosproject/kubevirtnode/codec/KubevirtGatewayNode.json
+++ b/apps/kubevirt-node/app/src/test/resources/org/onosproject/kubevirtnode/codec/KubevirtGatewayNode.json
@@ -5,5 +5,9 @@
   "dataIp": "172.16.130.4",
   "integrationBridge": "of:00000000000000a1",
   "tunnelBridge": "of:00000000000000a2",
-  "gatewayBridgeName": "gateway"
+  "gatewayBridgeName": "gateway",
+  "elbBridgeName": "elbnet",
+  "elbIp": "192.168.0.2",
+  "elbGwIp": "192.168.0.1",
+  "elbGwMac": "aa:bb:cc:dd:ee:ff"
 }
\ No newline at end of file