Add hostname to nodeinfo(#6156)

java/api/src/main/java/org/ray/api/runtimecontext/NodeInfo.java

@@ -12,14 +12,17 @@ public class NodeInfo {
 
   public final String nodeAddress;
 
+  public final String nodeHostname;
+
   public final boolean isAlive;
 
   public final Map<String, Double> resources;
 
-  public NodeInfo(UniqueId nodeId,  String nodeAddress,
+  public NodeInfo(UniqueId nodeId,  String nodeAddress, String nodeHostname,
                   boolean isAlive, Map<String, Double> resources) {
     this.nodeId = nodeId;
     this.nodeAddress = nodeAddress;
+    this.nodeHostname = nodeHostname;
     this.isAlive = isAlive;
     this.resources = resources;
   }
@@ -28,6 +31,7 @@ public class NodeInfo {
     return "NodeInfo{"
         + "nodeId='" + nodeId + '\''
         + ", nodeAddress='" + nodeAddress + "\'"
+        + ", nodeHostname'" + nodeHostname + "\'"
         + ", isAlive=" + isAlive
         + ", resources=" + resources
         + "}";

java/runtime/src/main/java/org/ray/runtime/gcs/GcsClient.java

@@ -77,12 +77,14 @@ public class GcsClient {
       if (data.getState() == GcsNodeInfo.GcsNodeState.ALIVE) {
         //Code path of node insertion.
         NodeInfo nodeInfo = new NodeInfo(
-            nodeId, data.getNodeManagerAddress(), true, new HashMap<>());
+            nodeId, data.getNodeManagerAddress(),
+            data.getNodeManagerHostname(),
+            true, new HashMap<>());
         nodes.put(nodeId, nodeInfo);
       } else {
         // Code path of node deletion.
         NodeInfo nodeInfo = new NodeInfo(nodeId, nodes.get(nodeId).nodeAddress,
-            false, new HashMap<>());
+            nodes.get(nodeId).nodeHostname, false, new HashMap<>());
         nodes.put(nodeId, nodeInfo);
       }
     }

python/ray/state.py

@@ -58,6 +58,7 @@ def _parse_client_table(redis_client):
                 "NodeID": node_id,
                 "Alive": True,
                 "NodeManagerAddress": item.node_manager_address,
+                "NodeManagerHostname": item.node_manager_hostname,
                 "NodeManagerPort": item.node_manager_port,
                 "ObjectManagerPort": item.object_manager_port,
                 "ObjectStoreSocketName": item.object_store_socket_name,

src/ray/protobuf/gcs.proto

@@ -183,6 +183,9 @@ message GcsNodeInfo {
 
   // Current state of this node.
   GcsNodeState state = 7;
+
+  // The Hostname address of the node manager.
+  string node_manager_hostname = 8;
 }
 
 message HeartbeatTableData {

src/ray/raylet/raylet.cc

@@ -84,12 +84,14 @@ ray::Status Raylet::RegisterGcs(const std::string &node_ip_address,
   node_info.set_object_store_socket_name(object_store_socket_name);
   node_info.set_object_manager_port(object_manager_.GetServerPort());
   node_info.set_node_manager_port(node_manager_.GetServerPort());
+  node_info.set_node_manager_hostname(boost::asio::ip::host_name());
 
   RAY_LOG(DEBUG) << "Node manager " << gcs_client_->client_table().GetLocalClientId()
                  << " started on " << node_info.node_manager_address() << ":"
                  << node_info.node_manager_port() << " object manager at "
                  << node_info.node_manager_address() << ":"
-                 << node_info.object_manager_port();
+                 << node_info.object_manager_port() << ", hostname "
+                 << node_info.node_manager_hostname();
   ;
   RAY_RETURN_NOT_OK(gcs_client_->client_table().Connect(node_info));