Mount overlaybd devices in journal mode

adam-rl · adam-rl · commit 807f5a76fb4e · 2025-10-19T23:34:32.000-07:00
This is slower but safer. All writes will go through the journal.
diff --git a/pkg/snapshot/overlay.go b/pkg/snapshot/overlay.go
@@ -1579,6 +1579,7 @@ func (o *snapshotter) basedOnBlockDeviceMount(ctx context.Context, s storage.Sna
 				Options: []string{
 					rwflag,
 					"discard",
+					"data=journal",
 				},
 			},
 		}, nil
diff --git a/pkg/snapshot/storage.go b/pkg/snapshot/storage.go
@@ -450,7 +450,7 @@ func (o *snapshotter) attachAndMountBlockDevice(ctx context.Context, snID string
 				} else {
 					switch fstype {
 					case "ext4":
-						mountOpts = "discard"
+						mountOpts = "discard,data=journal"
 					case "xfs":
 						mountOpts = "nouuid,discard"
 					default:
