Live migration with mediated devices such as NVIDIA vGPU

Proxmox VE 8.4
Released 09. April 2025: See Downloads

• Based on Debian Bookworm (12.10)
• Latest 6.8.12-9 Kernel as new stable default
• Newer 6.14 Kernel as opt-in
• QEMU 9.2.0
• LXC: 6.0.0
• ZFS: 2.2.7 (with compatibility patches for Kernel 6.14)
• Ceph Squid 19.2.1
• Ceph Reef 18.2.4
• Ceph Quincy 17.2.8 is end-of-life, users are advised to upgrade

Highlights

• Live migration with mediated devices such as NVIDIA vGPU.
  This allows the migration of running VM guests that use mediated devices.
  Hardware and driver support is required.
  Currently, only NVIDIA GPUs are known to support live migration.
• Support for external backup providers.
  Proxmox VE now provides an API that allows developers to write backup provider plugins.
  A backup provider plugin can implement backup and restore functionality for external backup solutions.
  This way, external backup solutions can be fully integrated with the Proxmox VE backup stack and GUI.
• Sharing host directories with VM guests using virtiofs.
  Virtiofs allows sharing directories between the Proxmox VE host and VMs without the overhead of a network filesystem.
  Modern Linux guests support virtiofs out of the box.
  Windows guests need to install additional software.
• Latest Linux 6.14 kernel available as opt-in kernel.
• Ceph Squid 19.2.1 is available as stable option.
• Seamless upgrade from Proxmox VE 7.4, see Upgrade from 7 to 8.

Changelog Overview
Before upgrading, please consider Known Issues & Breaking Changes.

Enhancements in the web interface (GUI)

• Allow to set a consent banner that users must acknowledge before logging in (issue 5463).
  This can be required for compliance reasons and is already supported in Proxmox Backup Server.
  The banner supports Markdown and can be set in Datacenter → Options → Consent Text.
• Sort storage content such as ISO files according to the browser locale and with numeric sorting (issue 6138).
  This results in a more natural sorting order with respect to capitalization and numbers in filenames.
• Downloading ISO, CT templates, or OVA appliances from URLs now uses the configured proxy for both HTTP and HTTPS connections (issue 3716).
• The migration network in the datacenter options can now be entered with a custom CIDR (issue 6142).
• Task lists now show an additional action column that opens the task details for better discoverability.
• Confirmation dialogs now mention the guest name to make it clearer for which guest the action will be applied (issue 3181).
• Better align privilege checks for adding PCI, USB, or VirtIO RNG devices in the web UI with the actual privilege checks in the backend.
• Allow uploading and downloading disk images to storages with content type "Import", in preparation for importing disk images to VMs in the future (issue 2424).
• Fix an issue where clicking on an external link to the GUI would display a login screen, even if the current session was still valid.
• Fix an issue where the PCI mapping editor would preselect the wrong radio button.
• Fix a security issue that allowed XSS via certain QEMU guest agent responses (PSA-2024-00016-1).
• HTML-encode API results before rendering as additional hardening against XSS (PSA-2025-00002-1).
• Various smaller improvements to the GUI.
• Update xterm.js to version 5.5.0.
• Fix an issue where an xterm.js console would not have the correct size on high-latency connections (issue 6223).
• Update noVNC to version 1.6.0.
• Fix some occurrences where strings were not marked as translatable.
• Fix some occurrences where translatable strings were split, which made potentially useful context unavailable for translators.
• Improved translations, among others:

1. Bulgarian
2. French
3. German
4. Italian
5. Japanese
6. Simplified Chinese
7. Spanish
8. Traditional Chinese
9. Ukrainian