just log a warning when a store type other than boltdb-shipper is det…

…ected when custom retention is enabled (#3785)

* just log a warning when a store type other than boltdb-shipper is detected when custom retention is enabled

* gofmt

* Update msg

Co-authored-by: Ed Welch <ed@oqqer.com>

Co-authored-by: Ed Welch <ed@oqqer.com>

pkg/storage/stores/shipper/compactor/retention/index.go

@@ -7,10 +7,14 @@ import (
 	"strings"
 	"time"
 
-	"github.com/cortexproject/cortex/pkg/chunk"
 	"github.com/prometheus/common/model"
 
+	"github.com/cortexproject/cortex/pkg/chunk"
+	util_log "github.com/cortexproject/cortex/pkg/util/log"
+	"github.com/go-kit/kit/log/level"
+
 	"github.com/grafana/loki/pkg/storage"
+	"github.com/grafana/loki/pkg/storage/stores/shipper"
 )
 
 const (
@@ -203,6 +207,10 @@ func parseLabelSeriesRangeKey(hashKey, rangeKey []byte) (LabelSeriesRangeKey, bo
 
 func validatePeriods(config storage.SchemaConfig) error {
 	for _, schema := range config.Configs {
+		if schema.IndexType != shipper.BoltDBShipperType {
+			level.Warn(util_log.Logger).Log("msg", fmt.Sprintf("custom retention is not supported for store %s, no retention will be applied for schema entry with start date %s", schema.IndexType, schema.From))
+			continue
+		}
 		if schema.IndexTables.Period != 24*time.Hour {
 			return fmt.Errorf("schema period must be daily, was: %s", schema.IndexTables.Period)
 		}