Add a new rpc command to get milvus build version whether cpu or gpu close#644

CHANGELOG.md

@@ -57,6 +57,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - \#502 - C++ SDK support IVFPQ and SPTAG
 - \#560 - Add version in server config file
 - \#605 - Print more messages when server start
+- \#644 - Add a new rpc command to get milvus build version whether cpu or gpu
 
 ## Improvement
 - \#255 - Add ivfsq8 test report detailed version

core/src/server/grpc_impl/request/CmdRequest.cpp

@@ -39,6 +39,12 @@ CmdRequest::OnExecute() {
         result_ = MILVUS_VERSION;
     } else if (cmd_ == "tasktable") {
         result_ = scheduler::ResMgrInst::GetInstance()->DumpTaskTables();
+    } else if (cmd_ == "mode") {
+#ifdef MILVUS_GPU_VERSION
+        result_ = "GPU";
+#else
+        result_ = "CPU";
+#endif
     } else {
         result_ = "OK";
     }