Edits that redefine a domain read the wrong XML:
- boot menu/order, vCPU hotplug and QoS read XMLDesc(0), which has no
secrets, so every such edit, even on a stopped VM, removed the VNC
password from the definition;
- console, video, CPU, memory and title/description edits read the live
XML, so on a running VM pending changes (e.g. a new memory size) were
reverted and runtime state was written into the definition.
All of them now read VIR_DOMAIN_XML_INACTIVE | SECURE (PERSISTENT_XML).
The console setters take the first graphics device of that definition
instead of looking it up by the live type.
Disk resize no longer redefines the domain. A running VM's image files
grow through blockResize, since qemu-img cannot take the lock QEMU
holds; block volumes (e.g. LVM) are grown by the storage pool first and
QEMU is then told the new size.
Live tests reproduce the losses on a RHEL qemu-kvm host; unit tests
check the XML flags, the console setters and the resize paths in CI.
- Runs only when TEST_LIBVIRT_HOST is set, so manage.py test on a
developer machine no longer creates VMs on the local libvirtd.
- Every VM and volume is named wvc-test-*, and volumes live in a
temporary wvc-test pool (/var/lib/libvirt/wvc-test) instead of the
default pool next to real images.
- Cleanup removes only prefixed domains and the test pool's volumes;
it also clears leftovers of an interrupted run before starting, and
tolerates domains that turned transient.
- tearDownClass fails if any domain or volume outside the test
namespace appeared, disappeared or was replaced.
- livetest gains create_volume/define_vm helpers and
test_live_dataloss.py, whose setUpClass opens the class transaction
last, so a failed libvirt connection cannot lock the test database
for later test classes.
The first live tests reproduce two known external-snapshot data losses
and are marked expectedFailure: reverting deletes a disk added after
the snapshot, and deleting the older of two snapshots deletes the
newer one's overlay.
