feat: pass tracing context in proto (#120)

* feat: pass tracing context in proto

* fix: run make

proto/greptime/v1/common.proto

@@ -29,10 +29,9 @@ message RequestHeader {
   AuthHeader authorization = 3;
   // The `dbname` for the request
   string dbname = 4;
-  // TraceID of request
-  uint64 trace_id = 5;
-  // SpanID of request
-  uint64 span_id = 6;
+  // Encoded trace_id & span_id, follow the w3c Trace Context
+  // https://www.w3.org/TR/trace-context/#header-name
+  map<string, string> tracing_context = 5;
 }
 
 message ResponseHeader { Status status = 1; }

proto/greptime/v1/meta/common.proto

@@ -25,6 +25,9 @@ message RequestHeader {
   // member_id is the ID of the sender server.
   uint64 member_id = 3;
   Role role = 4;
+  // Encoded trace_id & span_id, follow the w3c Trace Context
+  // https://www.w3.org/TR/trace-context/#header-name
+  map<string, string> tracing_context = 5;
 }
 
 enum Role {
@@ -49,9 +52,7 @@ message Peer {
   string addr = 2;
 }
 
-message TableId {
-  uint32 id = 1;
-}
+message TableId { uint32 id = 1; }
 
 message TableName {
   string catalog_name = 1;

proto/greptime/v1/region/server.proto

@@ -27,10 +27,8 @@ import "greptime/v1/ddl.proto";
 service Region { rpc Handle(RegionRequest) returns (RegionResponse); }
 
 message RegionRequestHeader {
-  // TraceID of request
-  uint64 trace_id = 1;
-  // SpanID of request
-  uint64 span_id = 2;
+  // Encoded trace_id & span_id, follow the w3c Trace Context https://www.w3.org/TR/trace-context/#header-name
+  map<string, string> tracing_context = 5;
   // DB Name of request, tracking only
   string dbname = 3;
 }