Upgrade to Atomix 3.0-rc5
* Upgrade Raft primitives to Atomix 3.0
* Replace cluster store and messaging implementations with Atomix cluster management/messaging
* Add test scripts for installing/starting Atomix cluster
* Replace core primitives with Atomix primitives.

Change-Id: I7623653c81292a34f21b01f5f38ca11b5ef15cad
diff --git a/core/api/src/main/java/org/onosproject/cluster/Node.java b/core/api/src/main/java/org/onosproject/cluster/Node.java
new file mode 100644
index 0000000..8d6a197
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/cluster/Node.java
@@ -0,0 +1,46 @@
+/*
+ * 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.cluster;
+
+import org.onlab.packet.IpAddress;
+
+/**
+ * Represents a controller instance as a member in a cluster.
+ */
+public interface Node {
+
+    /**
+     * Returns the instance identifier.
+     *
+     * @return instance identifier
+     */
+    NodeId id();
+
+    /**
+     * Returns the IP address of the controller instance.
+     *
+     * @return IP address
+     */
+    IpAddress ip();
+
+    /**
+     * Returns the TCP port on which the node listens for connections.
+     *
+     * @return TCP port
+     */
+    int tcpPort();
+
+}