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feat(nodedevs): the host's PCI and USB devices on a Devices page

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- A Devices section of each host lists its PCI devices by IOMMU group and
  its USB devices: what each is (vendor, product, IDs, class, driver), what
  the host itself has on it (its network interfaces, disks and graphics
  card, anywhere below it) and the VMs whose definitions name it.
- A VM names a PCI device by its address, a USB device by its address or
  by its model only; a VM that names a model only is shown on every device
  of that model, which one it takes is known only when it starts.
- A host without IOMMU groups says that no PCI device can be given to a VM
  and how to turn the IOMMU on.
- One listing of the host's node devices, one XML read each (a device gone
  meanwhile is left out), and the VMs' definitions read once; nothing is
  shown when they cannot be read, as a device would look free.
- Read only: giving devices to VMs comes in the next layers.
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catborise 2026-10-29 12:37:15 +03:00
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@ -619,6 +619,7 @@ A version from before v3.0.0 has no worker: `systemctl disable --now webvirt-wor
- A running or paused VM can be cloned: libvirt copies its disks from one instant while it keeps running (file systems are frozen for a moment when the guest agent is ready). It needs libvirt 11.10 or later on the host, local file disks and no TPM; the VM cannot be changed from the panel until the copy ends, and the copy can be cancelled. Cancelling a clone of a shut-off VM has no effect: it shows as cancelling until the copy ends. A target pool that fills up during the copy can pause the source VM; a clone that ends uncertain keeps the VM locked until a superuser resolves the job.
- A shut-off UEFI VM can be migrated: its NVRAM file is copied to the destination host (unless both hosts share the NVRAM directory). A shut-off VM with TPM state still has to be started and migrated live.
- Manual installs that keep their own `settings.py` copy the SQLite `OPTIONS` and `TEST` entries from `settings.py.template` and add `"operations"` to `INSTALLED_APPS`.
- A host's Devices page lists its PCI devices by IOMMU group and its USB devices, with what the host itself has on each (network interfaces, disks, its graphics card) and the VMs that name it. Manual installs that keep their own `settings.py` add `"nodedevs"` to `INSTALLED_APPS`.
- The SQLite database must be on a local file system (WAL).
- Outside compose, stop the Docker container with `docker stop -t 95` so the worker can finish running jobs.
- Installer and manual installations run the panel as systemd units (`webvirt-cloud`, `webvirt-novncd`, `webvirt-socketiod`, `webvirt-worker`) and computes run `webvirt-gstfsd`, instead of supervisor; see [Moving from supervisor to systemd](#moving-from-supervisor-to-systemd). Service settings go into `/etc/default/webvirtcloud`, service output into the journal (`journalctl -u webvirt-cloud`); the app log stays in `data/`.