New live guest tests compare what the guest agent reports (online vCPUs,
memory blocks, disk serials and buses, NIC MACs) with the persistent
definition, through the web views:
- at boot, with a data disk;
- after force off, CPU and memory resize and power on (2 vCPUs, 3 GiB);
- a hotplugged disk at once; a bus and serial change after powercycle;
- a NIC MAC change after powercycle, not before;
- a clone boots with its own MAC and disk copy;
- reverting a running snapshot removes a NIC added after it, in the
guest and in the definition, and leaves the VM running;
- a suspended guest does not answer and answers again after resume.
Every request in these tests must redirect (302), so a failing view is
not mistaken for a no-op. Only NICs with QEMU's 52:54: prefix are
compared, as a guest may create its own interfaces. All 13 guest tests
pass against a Rocky Linux 9 guest.
The live tests so far ran VMs without an OS, so everything that needs the
guest's cooperation was untested. With TEST_LIBVIRT_GUEST_IMAGE set to an
installed Linux image with qemu-guest-agent, instances/test_live_guest.py
boots wvc-test VMs from qcow2 overlays of it (the image is only read) and
checks through the web views:
- delete_vol on a running VM: the guest releases the disk, so it leaves
the live and persistent definitions and the volume is deleted;
- detach_vol removes the disk from the running guest and keeps the volume;
- add_network/delete_network: the guest sees the hotplugged NIC, and the
unplug completes in both definitions;
- set_vcpu brings a hotplugged vCPU online in the guest;
- osinfo returns the guest agent's OS, time zone and host name, and the
agent reports the VM's NIC by MAC;
- poweroff shuts the guest down through libvirt.
The image must be a BIOS-bootable qcow2 volume in a storage pool other
than wvc-test; the tests are skipped while a running VM uses it. They pass
against a Rocky Linux 9 guest on a RHEL qemu-kvm host; the guest had no
address on the NAT network (its network configuration is static), so only
the agent's NIC report is checked, not an address.
