Upgrading PVE 7.2 to 9.1 can only be reinstalled

upgrading Proxmox VE 7.2 to 9.1 does not have to be reinstalled, both official and community provide two ways to upgrade:

upgrade directly with apt (no need to reinstall the system)
back up the original VMs and containers, then install the 9.1 ISO and import the backed up VMs/containers back

apt upgrade, you cannot directly upgrade from 7.2 to 9.1 (Debian 11→13, kernel, virtualization suite are all replaced), the official upgrade document defaults to "you have upgraded to the latest version 8.4 first". That is:

If you insist on "heavy 7.2apt upgrade", you must first dist-upgrade 7.2→7.4→8.0→8.4→9.0→9.1 step by step.
official "recommended" practices are:
(1) Back up all VMs/CTs to external storage;
(2) Clean installation with 9.1 ISO (will empty the system disk);
(3) After installation, copy back the configuration of /etc/pve/storage.cfg, firewall rules, etc., and then restore the virtual machine from the backup. This
faster and cleaner, and avoids residual conflicts caused by major Debian version jumps.

conclusion:
is not "only" reinstalled, but in the case of 3 major versions, a clean install + backup restore is a more recommended solution for both the official and the community; Upgrading in place is theoretically possible, but it requires you to upgrade to 8.4 step by step and do a lot of manual troubleshooting, which is risky in the production environment.

Tears flowedReply

#14

Upgrading directly from 7.2 to 9.1 is too troublesome, and the intermediate versions must be upgraded one by one, which is prone to problems. It is still recommended to install a new one, which is more secure and saves time and effort.

3 个月前

Warm winter sunReply

#13

Upgrading PVE from 7.2 to 9.1 cannot be directly cross-version, and needs to be upgraded or reinstalled step by step. Reinstalling is faster and more stable, suitable for users who don't want to toss.

Night crawlerReply

#12

Upgrading PVE 7.2 to 9.1 doesn't actually require reinstalling, but upgrading across versions is troublesome and risky. It is recommended to back up and install a clean one, which is easy and clean.

4 个月前

Listen to the windReply

#11

Upgrading PVE from 7.2 to 9.1 is indeed not easy, and cross-version upgrades are risky and complex, so it is recommended to install a clean one after backup to save a lot of trouble.

Contented peopleReply

#10

Upgrading PVE from 7.2 to 9.1 is actually a safer way, you don't have to bite the bullet and upgrade across versions, and it is more troublesome to reinstall after backing up directly, and you can also avoid many potential problems.

Blooming seasonReply

Upgrading PVE from 7.2 to 9.1 actually does not need to be reinstalled, but the official recommends a clean installation is safer. Cross-version upgrades are complex and prone to problems, so it is more reassuring to back up and then operate.

Starry Sky StoryReply

Upgrading PVE 7.2 to 9.1 is not recommended to upgrade directly apt, as upgrading across versions is troublesome and risky.

The clouds are de...Reply

When upgrading PVE, there is a high risk of jumping across versions, so it is recommended to back up and install a new one. Although the official provides apt upgrade methods, the actual operation is complex and error-prone, so it is better for novices to reinstall it directly for safety.

It lives up to my...Reply

When upgrading PVE, there is a high risk of jumping across versions, and manual operations are prone to errors. The official recommendation is that a new installation is safer, can avoid many potential problems, and is worry-free and reliable.

A gentle breeze s...Reply

Upgrading PVE from 7.2 to 9.1 does not require reinstallation, but the cross-version upgrade process is complex and prone to problems. It is recommended to follow the official recommended method, which is safer.

The island of the...Reply

Upgrading PVE 7.2 to 9.1 is not necessary, but upgrading across versions is complex and risky, so it is recommended to back up directly and install a new one, which is more secure.

Coffee timeReply

Upgrading PVE from 7.2 to 9.1 actually does not require reinstallation, but upgrading across versions is troublesome and risky, so it is recommended to install it directly.

The smile is like...Reply

Upgrading across versions is too troublesome, so it is recommended to reinstall it directly. The apt upgrade process is complex and error-prone, especially when it involves multiple version switches, which is highly risky. Reinstallation is simple, but it ensures a clean and stable system.

The south wind ha...Reply

Upgrading PVE 7.2 to 9.1 does not require reinstallation, but cross-version upgrades are prone to problems, so it is recommended to back up and install a new one, which is more secure and reliable.

Upgrading PVE 7.2 to 9.1 can only be reinstalled

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Upgrading PVE 7.2 to 9.1 can only be reinstalled

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