Fix: specify backing file format when creating QEMU overlay

Not sure how this worked earlier, maybe earlier versions of QEMU assumed raw by default?
dividat · Sep 24, 2024 · dcb073c · dcb073c
1 parent 025505a
commit dcb073c
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/testing/run-in-vm/run-in-vm.py b/testing/run-in-vm/run-in-vm.py
@@ -83,8 +83,8 @@ def disk_overlay(disk):
         # Create a disk overlay
         subprocess.run(
             [
-                QEMU_IMG, 'create', '-f', 'qcow2', '-o'
-                'backing_file={}'.format(disk), temp + "/disk-overlay.qcow2"
+                QEMU_IMG, 'create', '-f', 'qcow2', '-b', disk, '-F', 'raw',
+                temp + "/disk-overlay.qcow2"
             ],
             check=True)