Implementing MatadataAppender intgerface on ruler

Author: alanprot

pkg/ruler/compat.go

@@ -11,6 +11,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promauto"
 	"github.com/prometheus/prometheus/model/exemplar"
 	"github.com/prometheus/prometheus/model/labels"
+	"github.com/prometheus/prometheus/model/metadata"
 	"github.com/prometheus/prometheus/model/value"
 	"github.com/prometheus/prometheus/notifier"
 	"github.com/prometheus/prometheus/promql"
@@ -86,6 +87,10 @@ func (a *PusherAppender) Commit() error {
 	return err
 }
 
+func (a *PusherAppender) UpdateMetadata(_ storage.SeriesRef, _ labels.Labels, _ metadata.Metadata) (storage.SeriesRef, error) {
+	return 0, errors.New("update metadata unsupported")
+}
+
 func (a *PusherAppender) Rollback() error {
 	a.labels = nil
 	a.samples = nil