Proxmox 8 to 9 Went So Smoothly It Made People Suspicious of Their Own Anxiety

# Proxmox 8 to 9 Went So Smoothly It Made People Suspicious of Their Own Anxiety Major infrastructure upgrades usually come with a little ritual dread. Backups get checked twice, release notes get stared at like legal documents, and every admin quietly imagines the one cursed service that won’t come back. That’s why the praise for Proxmox VE 8 to 9 hit so hard. One home server owner upgraded in place from PVE 8.4.19 to 9.2.3, ran `pve8to9 --full`, followed the wiki, switched repos, did the dist-upgrade, rebooted, and got exactly what every admin wants: no drama, no surprises, no weird archaeological dig through broken packages. Then they bought a Community subscription because polish like that doesn’t maintain itself. ## The Checklist Tool Was the Real Hero The star of the thread wasn’t a shiny new feature. It was the upgrade checker. The original poster said `pve8to9 --full` caught everything that mattered before the upgrade even started. That’s the kind of tooling people underestimate until it saves them from themselves. A major version jump is scary because the unknowns are everywhere: repositories, bootloaders, containers, custom kernel bits, storage, network cards, old config choices you forgot you made three years ago. A good checklist turns invisible danger into a to-do list. Several people echoed that confidence. One commenter said their own upgrade went seamlessly despite being “useless at Unix/Linux/etc,” adding that the 8-to-9 script tells you what would blow up so you can fix it at your leisure. Another upgraded about nine nodes, including a seven-node cluster, and said nearly all of them went without issues. The one exception was user error, not Proxmox, and even that node survived after extra work. That’s not magic. That’s what good guardrails feel like. ## Simple Setups Had the Best Time The original post was careful not to oversell the experience. Their setup was basic: one standalone node, no Ceph, no cluster, barely any customization. They openly admitted that simplicity did a lot of the heavy lifting, and that waiting for 9.x to mature probably helped. That honesty mattered because it kept the praise from turning into “everyone should click upgrade right now and stop worrying.” A vanilla host is the easy lane. Still, the fact that the easy lane worked cleanly is worth celebrating. The comments made that clear. Some users felt reassured enough to rethink their upgrade timelines. One person had been holding off because every major change, in their experience, breaks around 10 percent of things. They were not running anything too complicated either, but if the wrong 10 percent broke, rebuilding could eat real time. After reading the success story, they considered moving the upgrade from “summer holiday project” to “long weekend project.” That’s the power of a boring success report. It gives nervous people a floor to stand on. ## Then the Messier Setups Spoke Up The other side of the thread was blunt: “My setup is pretty basic” was doing serious work. One commenter said their upgrade went anything but smoothly. They spent most of a day chasing pre- and post-install errors, hit a kernel panic on boot, and eventually wiped the host and restored from backups. They were gracious about it, saying it wasn’t the end of the world and they were glad the original poster had a good experience, but the warning was clear. Smooth upgrades are not evenly distributed. Another user also hit a kernel panic on two out of three instances and had to modify some GRUB-related settings before everything settled down. Someone else had a more complex system with custom `i915` and `xe` kernel modules, HDD and NVMe passthrough by ID, and other custom work. Their upgrade was not as easy, but still went better than expected because the tool pointed out a lot of things to fix first. That’s the more realistic middle ground: Proxmox did its job, but local weirdness still gets a vote. ## Containers and Hacks Were the Stress Test LXC came up as a quiet dividing line. The original poster had only one Pi-hole container, and it sailed through the upgrade without needing config changes. After reboot, it started normally and DNS kept resolving. They even ran `pve8to9 --full` again afterward and saw a warning about failing to get cgroup support status for the container because the script couldn’t construct the path to the systemd binary. Their read was that it looked like a known cosmetic warning in the checker on PVE 9, not an actual container problem. Another commenter had a much uglier container story. They said the OS upgrade itself was smooth, but a pile of previous-admin hacks for Docker and FreeIPA inside LXC broke afterward. Those hacks included things like aggressively disabling AppArmor, and the upgrade tool didn’t catch most of it. Their takeaway was simple: they planned to move that setup into VMs soon. That’s a useful lesson. Upgrade tools can catch platform-level problems. They can’t always understand years of “just make it work” decisions stacked inside a container. ## The Network Gremlins Waited a Few Days Not every problem showed up immediately. One user upgraded a five-node cluster node by node from 8.4 to 9.2.3, and at first everything looked fine. Then, after a couple of days, some nodes started losing LAN connectivity, with logs full of network errors. Their quick fix was to turn off processing from the network card and move it to the CPU. That kind of delayed failure is the reason experienced admins don’t fully relax after the first successful reboot. It also explains why people kept pointing back to the official documentation and known upgrade issues. A link to the upgrade guide appeared in the thread, followed by a reminder to read everything, especially the known issues section. That may sound obvious, but it’s the advice people skip when they’re feeling lucky. The successful path here wasn’t “YOLO dist-upgrade.” It was backups, checklist, docs, repo changes, upgrade, reboot, verify, and then keep watching. Boring steps. Very good steps. ## Supporting the Project Became Part of the Story The original poster’s final move gave the thread its emotional punch: after the smooth upgrade, they bought a one-year Community subscription. That’s not just fan service. It’s a recognition that mature upgrade paths, detailed docs, and preflight tools are work. They don’t appear because infrastructure elves got bored. They’re maintained, tested, argued over, and improved until a scary version jump feels routine for a normal user with a normal server. That message landed alongside another migration story: one commenter had just installed their first Proxmox VE after moving from Microsoft Hyper-V and was already liking it. That’s the broader context. Proxmox is not just serving longtime homelab users anymore. It’s catching people leaving other platforms, people building clusters, people running patched-together containers, people with custom kernels, people who ask Gemini or Claude for help when boot goes sideways. The upgrade path has to meet all of them somewhere close to reality. ## Smooth Doesn’t Mean Careless The best takeaway from the thread is not that Proxmox 8 to 9 is risk-free. It’s that Proxmox made a serious upgrade feel manageable for a lot of people. For simple standalone nodes, the path can be almost boring. For clusters, it can still be clean if you follow the docs. For customized hosts, old hacks, passthrough, custom modules, and fragile containers, the upgrade may still bite. That’s not a contradiction. That’s infrastructure. So the right mood is cautious optimism. Run `pve8to9 --full`. Read the upgrade guide and known issues. Back up guests and host configs. Know how you’ll recover if the bootloader gets weird. Don’t assume a container full of hacks will behave like a clean VM. Watch the system for days, not minutes. And when an upgrade this big goes smoothly, maybe say thanks with more than a comment. The scary part is version jumps will never stop being scary. The impressive part is when good engineering makes them feel almost uneventful.