diff --git a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/codec/OpenstackControllerCodec.java b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/codec/OpenstackControllerCodec.java
new file mode 100644
index 0000000..1921d43
--- /dev/null
+++ b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/codec/OpenstackControllerCodec.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2018-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.openstacknode.codec;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onlab.packet.IpAddress;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.net.behaviour.ControllerInfo;
+import org.slf4j.Logger;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onlab.util.Tools.nullIsIllegal;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Openstack controller codec used for serializing and de-serializing JSON string.
+ */
+public class OpenstackControllerCodec extends JsonCodec<ControllerInfo> {
+
+    private final Logger log = getLogger(getClass());
+
+    private static final String IP = "ip";
+    private static final String PORT = "port";
+    private static final String TCP = "tcp";  // controller connection should always be TCP
+
+    private static final String MISSING_MESSAGE = " is required in ControllerInfo";
+
+    @Override
+    public ObjectNode encode(ControllerInfo controller, CodecContext context) {
+        checkNotNull(controller, "Openstack controller cannot be null");
+
+        return context.mapper().createObjectNode()
+                .put(IP, controller.ip().toString())
+                .put(PORT, controller.port());
+    }
+
+    @Override
+    public ControllerInfo decode(ObjectNode json, CodecContext context) {
+        if (json == null || !json.isObject()) {
+            return null;
+        }
+
+        String ip = nullIsIllegal(json.get(IP).asText(),
+                IP + MISSING_MESSAGE);
+        int port = nullIsIllegal(json.get(PORT).asInt(),
+                PORT + MISSING_MESSAGE);
+
+        return new ControllerInfo(IpAddress.valueOf(ip), port, TCP);
+    }
+}
diff --git a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/codec/OpenstackNodeCodec.java b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/codec/OpenstackNodeCodec.java
index 4f89c3c..282560d 100644
--- a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/codec/OpenstackNodeCodec.java
+++ b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/codec/OpenstackNodeCodec.java
@@ -22,11 +22,12 @@
 import org.onosproject.codec.CodecContext;
 import org.onosproject.codec.JsonCodec;
 import org.onosproject.net.DeviceId;
+import org.onosproject.net.behaviour.ControllerInfo;
+import org.onosproject.openstacknode.api.DefaultOpenstackNode;
 import org.onosproject.openstacknode.api.NodeState;
 import org.onosproject.openstacknode.api.OpenstackAuth;
 import org.onosproject.openstacknode.api.OpenstackNode;
 import org.onosproject.openstacknode.api.OpenstackPhyInterface;
-import org.onosproject.openstacknode.api.DefaultOpenstackNode;
 import org.slf4j.Logger;
 
 import java.util.ArrayList;
@@ -55,6 +56,7 @@
     private static final String INTEGRATION_BRIDGE = "integrationBridge";
     private static final String STATE = "state";
     private static final String PHYSICAL_INTERFACES = "phyIntfs";
+    private static final String CONTROLLERS = "controllers";
     private static final String AUTHENTICATION = "authentication";
     private static final String END_POINT = "endPoint";
 
@@ -100,6 +102,12 @@
         });
         result.set(PHYSICAL_INTERFACES, phyIntfs);
 
+        ArrayNode controllers = context.mapper().createArrayNode();
+        node.controllers().forEach(controller -> {
+            ObjectNode controllerJson = context.codec(ControllerInfo.class).encode(controller, context);
+            controllers.add(controllerJson);
+        });
+
         if (node.authentication() != null) {
             ObjectNode authJson = context.codec(OpenstackAuth.class)
                     .encode(node.authentication(), context);
@@ -163,6 +171,21 @@
         }
         nodeBuilder.phyIntfs(phyIntfs);
 
+        // parse customized controllers
+        List<ControllerInfo> controllers = new ArrayList<>();
+        JsonNode controllersJson = json.get(CONTROLLERS);
+        if (controllersJson != null) {
+
+            final JsonCodec<ControllerInfo>
+                    controllerCodec = context.codec(ControllerInfo.class);
+
+            IntStream.range(0, controllersJson.size()).forEach(i -> {
+                ObjectNode controllerJson = get(controllersJson, i);
+                controllers.add(controllerCodec.decode(controllerJson, context));
+            });
+        }
+        nodeBuilder.controllers(controllers);
+
         // parse authentication
         JsonNode authJson = json.get(AUTHENTICATION);
         if (json.get(AUTHENTICATION) != null) {
diff --git a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackAuth.java b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackAuth.java
index 3257353..5a3b30d 100644
--- a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackAuth.java
+++ b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackAuth.java
@@ -22,6 +22,9 @@
 
 import static com.google.common.base.Preconditions.checkArgument;
 
+/**
+ * Implementation class of openstack authentication.
+ */
 public class DefaultOpenstackAuth implements OpenstackAuth {
 
     private final String version;
diff --git a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackNodeHandler.java b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackNodeHandler.java
index dc879d8..06b65a3 100644
--- a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackNodeHandler.java
+++ b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackNodeHandler.java
@@ -256,13 +256,19 @@
             return;
         }
 
-        Set<IpAddress> controllerIps = clusterService.getNodes().stream()
+        List<ControllerInfo> controllers;
+
+        if (osNode.controllers() != null && osNode.controllers().size() > 0) {
+            controllers = (List<ControllerInfo>) osNode.controllers();
+        } else {
+            Set<IpAddress> controllerIps = clusterService.getNodes().stream()
                     .map(ControllerNode::ip)
                     .collect(Collectors.toSet());
 
-        List<ControllerInfo> controllers = controllerIps.stream()
-                .map(ip -> new ControllerInfo(ip, DEFAULT_OFPORT, DEFAULT_OF_PROTO))
-                .collect(Collectors.toList());
+            controllers = controllerIps.stream()
+                    .map(ip -> new ControllerInfo(ip, DEFAULT_OFPORT, DEFAULT_OF_PROTO))
+                    .collect(Collectors.toList());
+        }
 
         String dpid = deviceId.toString().substring(DPID_BEGIN);
 
diff --git a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackPhyInterface.java b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackPhyInterface.java
index f4238a3..498ce5c 100644
--- a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackPhyInterface.java
+++ b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DefaultOpenstackPhyInterface.java
@@ -22,6 +22,9 @@
 
 import static com.google.common.base.Preconditions.checkArgument;
 
+/**
+ * Implementation class of openstack physical interface.
+ */
 public class DefaultOpenstackPhyInterface implements OpenstackPhyInterface {
 
     private final String network;
diff --git a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DistributedOpenstackNodeStore.java b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DistributedOpenstackNodeStore.java
index d766473..0383b97 100644
--- a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DistributedOpenstackNodeStore.java
+++ b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/impl/DistributedOpenstackNodeStore.java
@@ -25,6 +25,7 @@
 import org.onlab.util.KryoNamespace;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.core.CoreService;
+import org.onosproject.net.behaviour.ControllerInfo;
 import org.onosproject.openstacknode.api.DefaultOpenstackNode;
 import org.onosproject.openstacknode.api.NodeState;
 import org.onosproject.openstacknode.api.OpenstackNode;
@@ -83,6 +84,7 @@
             .register(NodeState.class)
             .register(OpenstackPhyInterface.class)
             .register(DefaultOpenstackPhyInterface.class)
+            .register(ControllerInfo.class)
             .register(DefaultOpenstackAuth.class)
             .register(DefaultOpenstackAuth.Perspective.class)
             .register(DefaultOpenstackAuth.Protocol.class)
diff --git a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/web/OpenstackNodeCodecRegister.java b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/web/OpenstackNodeCodecRegister.java
index c1609a9..9002237 100644
--- a/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/web/OpenstackNodeCodecRegister.java
+++ b/apps/openstacknode/app/src/main/java/org/onosproject/openstacknode/web/OpenstackNodeCodecRegister.java
@@ -21,10 +21,12 @@
 import org.apache.felix.scr.annotations.Reference;
 import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.onosproject.codec.CodecService;
+import org.onosproject.net.behaviour.ControllerInfo;
 import org.onosproject.openstacknode.api.OpenstackAuth;
 import org.onosproject.openstacknode.api.OpenstackNode;
 import org.onosproject.openstacknode.api.OpenstackPhyInterface;
 import org.onosproject.openstacknode.codec.OpenstackAuthCodec;
+import org.onosproject.openstacknode.codec.OpenstackControllerCodec;
 import org.onosproject.openstacknode.codec.OpenstackNodeCodec;
 import org.onosproject.openstacknode.codec.OpenstackPhyInterfaceCodec;
 
@@ -46,6 +48,7 @@
         codecService.registerCodec(OpenstackNode.class, new OpenstackNodeCodec());
         codecService.registerCodec(OpenstackAuth.class, new OpenstackAuthCodec());
         codecService.registerCodec(OpenstackPhyInterface.class, new OpenstackPhyInterfaceCodec());
+        codecService.registerCodec(ControllerInfo.class, new OpenstackControllerCodec());
 
         log.info("Started");
     }
@@ -55,6 +58,7 @@
         codecService.unregisterCodec(OpenstackNode.class);
         codecService.unregisterCodec(OpenstackAuth.class);
         codecService.unregisterCodec(OpenstackPhyInterface.class);
+        codecService.unregisterCodec(ControllerInfo.class);
 
         log.info("Stopped");
     }