cleanup tmp meta file if file renaming failed

Signed-off-by: zhulongcheng <[email protected]>

block.go

@@ -29,6 +29,7 @@ import (
 	"github.com/prometheus/tsdb/chunkenc"
 	"github.com/prometheus/tsdb/chunks"
 	tsdb_errors "github.com/prometheus/tsdb/errors"
+	"github.com/prometheus/tsdb/fileutil"
 	"github.com/prometheus/tsdb/index"
 	"github.com/prometheus/tsdb/labels"
 )
@@ -259,7 +260,14 @@ func writeMetaFile(dir string, meta *BlockMeta) error {
 	if err := f.Close(); err != nil {
 		return err
 	}
-	return renameFile(tmp, path)
+
+	if err := fileutil.Rename(tmp, path); err != nil {
+		merr.Add(err)
+		merr.Add(os.RemoveAll(tmp))
+		return merr.Err()
+	}
+
+	return nil
 }
 
 // Block represents a directory of time series data covering a continuous time range.