Dashboards: Disallow List with RV filter on legacy & align RV format (#104003)

Throw errors when trying to call List in legacy with an RV specified
Change ResourceVersion to microseconds

Co-authored-by: Marco de Abreu <18629099+marcoabreu@users.noreply.github.com>

pkg/registry/apis/dashboard/legacy/sql_dashboards.go

@@ -550,7 +550,7 @@ func (a *dashboardSqlAccess) GetLibraryPanels(ctx context.Context, query Library
 			ObjectMeta: metav1.ObjectMeta{
 				Name:              p.UID,
 				CreationTimestamp: metav1.NewTime(p.Created),
-				ResourceVersion:   strconv.FormatInt(p.Updated.UnixMilli(), 10),
+				ResourceVersion:   strconv.FormatInt(p.Updated.UnixMicro(), 10),
 			},
 			Spec: dashboard.LibraryPanelSpec{},
 		}
@@ -610,7 +610,7 @@ func (a *dashboardSqlAccess) GetLibraryPanels(ctx context.Context, query Library
 	if query.UID == "" {
 		rv, err := sqlx.GetResourceVersion(ctx, "library_element", "updated")
 		if err == nil {
-			res.ResourceVersion = strconv.FormatInt(rv, 10)
+			res.ResourceVersion = strconv.FormatInt(rv*1000, 10) // convert to microseconds
 		}
 	}
 	return res, err

pkg/registry/apis/dashboard/legacy/storage.go

@@ -13,6 +13,7 @@ import (
 	"github.com/grafana/grafana/pkg/apimachinery/utils"
 	"github.com/grafana/grafana/pkg/services/dashboards"
 	"github.com/grafana/grafana/pkg/storage/unified/resource"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
 )
 
 func getDashboardFromEvent(event resource.WriteEvent) (*dashboard.Dashboard, error) {
@@ -222,6 +223,9 @@ func (a *dashboardSqlAccess) ReadResource(ctx context.Context, req *resource.Rea
 
 // List implements AppendingStore.
 func (a *dashboardSqlAccess) ListIterator(ctx context.Context, req *resource.ListRequest, cb func(resource.ListIterator) error) (int64, error) {
+	if req.ResourceVersion != 0 {
+		return 0, apierrors.NewBadRequest("List with explicit resourceVersion is not supported with this storage backend")
+	}
 	opts := req.Options
 	info, err := claims.ParseNamespace(opts.Key.Namespace)
 	if err == nil {
@@ -265,6 +269,7 @@ func (a *dashboardSqlAccess) ListIterator(ctx context.Context, req *resource.Lis
 	if err != nil {
 		return 0, err
 	}
+	listRV *= 1000 // Convert to microseconds
 	rows, err := a.getRows(ctx, sql, query)
 	if rows != nil {
 		defer func() {

pkg/registry/apis/dashboard/libary_panel.go

@@ -13,6 +13,7 @@ import (
 	"github.com/grafana/grafana/pkg/apimachinery/utils"
 	"github.com/grafana/grafana/pkg/registry/apis/dashboard/legacy"
 	"github.com/grafana/grafana/pkg/services/apiserver/endpoints/request"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
 )
 
 var (
@@ -51,6 +52,9 @@ func (s *LibraryPanelStore) ConvertToTable(ctx context.Context, object runtime.O
 }
 
 func (s *LibraryPanelStore) List(ctx context.Context, options *internalversion.ListOptions) (runtime.Object, error) {
+	if options.ResourceVersion != "" {
+		return nil, apierrors.NewBadRequest("List with explicit resourceVersion is not supported with this storage backend")
+	}
 	ns, err := request.NamespaceInfoFrom(ctx, true)
 	if err != nil {
 		return nil, err