[pve-devel] Proxmox VE 9.0 released!

[Thomas Lamprecht]

Hi all!

We are pleased to announce the first stable release of Proxmox Virtual
Environment v9.0 - immediately available for download!

The new version is based on the great Debian 13 "Trixie" but we're using a
newer Linux kernel 6.14.8-2 as stable default in Proxmox VE.
Beyond the core system updates, we've also refreshed many of our included
technologies. You'll find updated versions of essential software like QEMU
10.0.2, LXC 6.0.4, ZFS 2.3.3, and Ceph Squid 19.2.3, all integrated
seamlessly.

We're incredibly proud of the hard work that has gone into this release and
can't wait for you to experience it.

Some of the exciting new features we've packed into Proxmox VE 9.0:

* Snapshots as volume chains provide vendor-agnostic support for snapshots
  on any storage system that supports block storage. This includes iSCSI and
  Fibre Channel-attached SANs.
* High-Availability (HA) rules for resource-to-node and resource-to-resource
  affinity
* Fabrics for the Software-Defined Networking (SDN) stack
* Modernized mobile web interface written in the rust programming language
  using the Yew web framework.
* Comprehensive upgrade guide from 8 to 9
* ZFS 2.3.3 with support for adding new devices to RAIDZ pools without
  downtime.
* and much more.

Beyond these major additions, we've also implemented numerous performance
enhancements and bug fixes to make your experience even smoother. For a full
list of changes, check out our release notes.

Release notes
https://pve.proxmox.com/wiki/Roadmap

Press release
https://www.proxmox.com/en/news/press-releases

Download
https://enterprise.proxmox.com/iso

Documentation
https://pve.proxmox.com/pve-docs

Community Forum
https://forum.proxmox.com

Bugtracker
https://bugzilla.proxmox.com

Source code
https://git.proxmox.com

There has been a lot of feedback from our community members and customers,
and many of you reported issues, submitted patches, and were involved in
testing - THANK YOU for your support!

FAQ
Q: Can I upgrade latest Proxmox VE 8 to 9 with apt?
A: Yes, please follow the upgrade instructions on
   https://pve.proxmox.com/wiki/Upgrade_from_8_to_9

Q: Can I upgrade an 9.0 beta installation to the stable 9.0 via apt?
A: Yes, upgrading from beta to stable installation is possible via apt. We
   recommend switching to the pve-enterprise repository on upgrade for the
   most stable experience.

Q: How long will Proxmox VE 8.4 receive bug fixes and security support?
A: Proxmox VE 8.4 will receive security updates and critical bug fixes until
   August 2026. This support window provides an overlap of approximately one
   year after the release of Proxmox VE 9.0, giving users ample time to plan
   their upgrade to the new major version.
   For more information on the support lifecycle of Proxmox VE releases,
   please visit:
   https://pve.proxmox.com/pve-docs/chapter-pve-faq.html#faq-support-table

Q: Why is Proxmox VE 9.0 released ahead of the stable Debian 13 release?
A: Debian 13 is scheduled for its stable release this Saturday, August 9.
   Its core components have been stabilized since it entered the "hard
   freeze" phase on May 15. Following extensive integration testing and
   valuable feedback during the Proxmox VE 9.0 beta, we are confident in the
   stability of this release. Since our core packages are either maintained
   directly by the Proxmox team or are already locked by Debian's strict
   freeze policy, there is no technical reason to postpone our release.

Q: Can I install Proxmox VE 9.0 on top of Debian 13 "Trixie"?
A: Yes, see
   https://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_13_Trixie

Q: Can I upgrade my Proxmox VE 8.4 cluster with Ceph Reef to v9.0?
A: This is a two-step process. First, you have to upgrade Ceph from Reef to
   Squid, and afterward you can upgrade Proxmox VE from 8.4 to 9.0. There
   are a lot of improvements and changes, so please follow the upgrade
   documentation exactly as described:
   https://pve.proxmox.com/wiki/Ceph_Reef_to_Squid
   https://pve.proxmox.com/wiki/Upgrade_from_8_to_9

best regards
Thomas Lamprecht