pve-microvm v0.3.23

Linked-clone disk format fix

• Detect PVE-managed disk formats through PVE::Storage::parse_volname() instead of calling the nonexistent PVE::Storage::volume_format() API.
• Boot file-backed qcow2 linked clones with format=qcow2; LVM-thin and ZFS volumes remain raw, and RBD remains format=rbd.
• Fail command generation when PVE cannot identify a managed volume format rather than silently treating it as raw and risking writes through the wrong QEMU block driver.
• Add executable Perl tests for raw, qcow2 linked clones, RBD, explicit format overrides, missing metadata, and parser failure.
• Document storage-specific formats and the deterministic device order: scsi0 is /dev/vda root, while optional cloud-init scsi1 is /dev/vdb.

Live validation on PVE 9.2.x created a file-backed qcow2 template and linked clone, confirmed parse_volname() and qm showcmd both selected qcow2, and booted the clone successfully through its serial console.

Enterprise Linux template fixes

• Repair empty or dangling OCI /etc/resolv.conf before chroot package installation, restoring DNS for affected image families.
• Treat apt, apk, dnf, microdnf, tdnf, and yum transaction failures as fatal instead of publishing a bare but apparently successful template.
• Use NetworkManager with an autoconnect DHCP profile on Enterprise Linux 8, 9, and 10.
• Install full util-linux so /usr/bin/login exists for the serial console.
• Remove the unavailable dhclient fallback from Enterprise Linux templates.
• Add regression tests for resolver repair, Enterprise Linux detection, package selection, and fail-closed transactions.

Live validation used AlmaLinux 10.2 on PVE 9.2.6: a full clone booted with root on /dev/vda, NetworkManager and SSH active, a responsive QEMU guest agent, working DNS, and no legacy DHCP unit.

Guest-agent service fix

• New apt- and RPM-based templates now use the packaged, device-bound
  qemu-guest-agent.service exclusively.
• Stop generating a competing microvm-agent.service that could loop forever
  when both agents attempted to open /dev/vport1p1.
• Template creation removes the obsolete custom unit and unmasks the packaged
  service, making the operation safe for reused root filesystems.
• Add regression tests and remediation guidance for older affected guests.

API/UI command-builder reload

• Package configure and qemu-server trigger paths now run
  systemctl try-restart pvedaemon.service after applying or refreshing files.
• This ensures UI, API, pvesh, and automation starts use the newly installed
  MicroVM.pm; long-lived pvedaemon workers previously retained the old module.
• Existing running microVMs are not interrupted. They still need an intentional
  restart when their QEMU process must gain newly added command-line options.

Upgrade safety

• Detect and repair hosts that already contain multiple historical copies of
  the MicroVM.pm import/delegation block, canonicalising them to exactly one.

• Preserve existing clean backups while normalising damaged patched files.

• Package upgrades no longer remove the patch stamp and blindly insert another
  Perl import/delegation block.

• When qemu-server is already patched, upgrades refresh MicroVM.pm and the UI
  without modifying QemuServer.pm again.

• If files and stamp are out of sync, the patcher checks existing markers before
  insertion, so applying twice remains idempotent.

• The CI suite executes the embedded QemuServer patcher twice against a fixture
  and requires exactly one import and one delegation block.

This release supersedes v0.3.17 through v0.3.22 for deployment.

Guest lifecycle fixes

• Add PVE's qmeventd event monitor to every microVM QEMU command line.
  Guest-initiated shutdowns are now reaped correctly instead of leaving QEMU
  paused in shutdown state under -no-shutdown.
• qm shutdown, qm reboot, and the corresponding PVE web UI actions now work
  for standard-profile guests with the QEMU guest agent enabled.
• Add D-Bus to newly built Debian/Ubuntu templates so the guest agent can ask
  systemd/logind to schedule shutdown and reboot.

Existing Debian/Ubuntu guests built without D-Bus need:

apt-get update
apt-get install -y dbus
systemctl enable --now dbus

Guests created with --no-agent still have no guaranteed graceful shutdown
path; use qm stop or install and enable the QEMU guest agent.

Configurable PVE bridge

• Add --bridge BRIDGE and --bridge=BRIDGE to
  pve-microvm-template.
• Remove hardcoded vmbr0 from OpenWrt, OPNsense, and SmolBSD template paths.
• All template paths now honour the configured bridge.

Tests and documentation

• Add parser tests for both bridge argument forms and missing values.
• Add command-builder contracts for qmeventd, QEMU reconnect compatibility,
  D-Bus, and hardcoded bridge prevention.
• Document shutdown/reboot diagnosis, existing-guest remediation, and the
  guest-agent limitation.
• Correct troubleshooting guidance: apply patches to the current qemu-server
  files directly; never restore a potentially stale backup before applying.

Upgrade

Use the latest-release command from the installation guide, install the .deb,
and restart each running microVM so its QEMU process gains the qmeventd monitor.
Templates and stopped guests do not need to be started during the upgrade.