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+---
+id: f79b6b07-a0ec-4baa-9e1b-4732d104056a
+type: solution
+title: "Proxmox 7 to 8 upgrade completed successfully"
+tags: [proxmox, homelab, upgrade, infrastructure]
+importance: 0.9
+confidence: 0.8
+created: "2026-02-19T17:05:30.467207+00:00"
+updated: "2026-02-19T17:05:30.467207+00:00"
+---
+
+## Proxmox PVE 7.4-20 to 8.4.16 Upgrade (2026-02-19)
+
+Successfully upgraded Proxmox from PVE 7.4-20 (kernel 5.13.19) to PVE 8.4.16 (kernel 6.8.12-18-pve).
+
+## Procedure
+1. Backed up all 13 production guests to TrueNAS (home-truenas PVE storage at /mnt/pve/home-truenas)
+2. Ran pve7to8 --full (23 passed, 0 failures)
+3. Switched local DNS to 1.1.1.1/8.8.8.8 (Pi-holes on Proxmox guests)
+4. Shut down all guests (some needed --forceStop)
+5. Backed up /etc/apt/sources.list and sources.list.d/
+6. Changed repos: bullseye -> bookworm
+7. DEBIAN_FRONTEND=noninteractive apt dist-upgrade -y -o Dpkg::Options::='--force-confnew'
+8. Rebooted (~4 min to come back)
+9. Started guests in dependency order
+10. Validated all services
+
+## Key Issues
+- I/O storm: all guests booting simultaneously caused ~50% I/O delay for minutes
+- Pi-hole 1 Docker container needed restart (UDP DNS failed, TCP worked)
+- Home Assistant got new DHCP IP (10.10.0.215 instead of previous)
+- VMs 105/112 ignored ACPI shutdown, needed --forceStop
+- Several guests had onboot=1, auto-started before manual ordering
+
+## Phase 2 (PVE 8->9) pending after 1-2 week stabilization period.