add the opentelemetry tracing (#908)

* add the opentelemetry tracing

* fix the error sampler config

* 添加stream的链路跟踪

* fix the error field name

core/opentelemetry/attributes.go

@@ -0,0 +1,45 @@
+package opentelemetry
+
+import (
+	"go.opentelemetry.io/otel/attribute"
+	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
+	grpc_codes "google.golang.org/grpc/codes"
+)
+
+const (
+	// GRPCStatusCodeKey is convention for numeric status code of a gRPC request.
+	GRPCStatusCodeKey = attribute.Key("rpc.grpc.status_code")
+
+	// Name of message transmitted or received.
+	RPCNameKey = attribute.Key("name")
+
+	// Type of message transmitted or received.
+	RPCMessageTypeKey = attribute.Key("message.type")
+
+	// Identifier of message transmitted or received.
+	RPCMessageIDKey = attribute.Key("message.id")
+
+	// The compressed size of the message transmitted or received in bytes.
+	RPCMessageCompressedSizeKey = attribute.Key("message.compressed_size")
+
+	// The uncompressed size of the message transmitted or received in
+	// bytes.
+	RPCMessageUncompressedSizeKey = attribute.Key("message.uncompressed_size")
+)
+
+// Semantic conventions for common RPC attributes.
+var (
+	// Semantic convention for gRPC as the remoting system.
+	RPCSystemGRPC = semconv.RPCSystemKey.String("grpc")
+
+	// Semantic convention for a message named message.
+	RPCNameMessage = RPCNameKey.String("message")
+
+	// Semantic conventions for RPC message types.
+	RPCMessageTypeSent     = RPCMessageTypeKey.String("SENT")
+	RPCMessageTypeReceived = RPCMessageTypeKey.String("RECEIVED")
+)
+
+func StatusCodeAttr(c grpc_codes.Code) attribute.KeyValue {
+	return GRPCStatusCodeKey.Int64(int64(c))
+}