Add bucket's traffic metrics (#6444)

* Add bucket's traffic metrics

* Add bucket traffic to dashboards

* Fix bucket metrics help messages

* Fix variable names

weed/s3api/s3api_object_handlers_put.go

@@ -17,6 +17,7 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	weed_server "github.com/seaweedfs/seaweedfs/weed/server"
+	stats_collect "github.com/seaweedfs/seaweedfs/weed/stats"
 )
 
 func (s3a *S3ApiServer) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
@@ -161,7 +162,7 @@ func (s3a *S3ApiServer) putToFiler(r *http.Request, uploadUrl string, dataReader
 		glog.Errorf("upload to filer error: %v", ret.Error)
 		return "", filerErrorToS3Error(ret.Error)
 	}
-
+	stats_collect.S3BucketTrafficReceivedBytesCounter.WithLabelValues(bucket).Add(float64(ret.Size))
 	return etag, s3err.ErrNone
 }