XCP-ng 8.3 updates announcements and testing

olivierlambert

Thanks for your feedback

Greg_E

Did the three hosts in my lab pool, nothing blew up so I guess that's good. Just nfs storage with a few windows VMs and a Debian 13 for XO from sources.

I think everything is now an efi boot, but no secure boot machines.

Greg_E

Working on my production system today and I noticed something new.

Three hosts in a pool, doing a Rolling Pool Update.

I'm seeing VMs migrate to both available hosts to speed things up, this is not the actions I've seen in the past. Just an interesting thing to see all three host go yellow while it is migrating.

OK, only happened to evac the third host, evac second host was back to the normal move everything to the same host (#3).

And not sure why, but the process start to finish on host 1 was faster than the other two, host 1 is coordinator.

Also of note, there seems to be no place to do a RPU from within XO6.

stormi

Thank you everyone for your tests and your feedback!

The updates are live now: https://xcp-ng.org/blog/2025/12/18/december-2025-security-and-maintenance-updates-for-xcp-ng-8-3-lts/

marcoi

updates done on my two main servers and one dev box i happen to power on today. so far so good.

PS: Any way to get the following included on the next update for networking? I need it to run a scenario with opnsense vm. right now i have a script i run manually after rebooting the server.

ovs-ofctl add-flow xenbr3 "table=0, dl_dst=01:80:c2:00:00:03, actions=flood"

thanks

acebmxer

@stormi

In regards to UEFI Secure boot in recent update.

from pool master host.

[19:09 xcp-ng-qhfpcnmb ~]# rpm -q varstored
varstored-1.2.0-3.4.xcpng8.3.x86_64

8.3 with varstored >= 1.2.0-3.4
Secure Boot is ready to use on new VMs without extra configuration. Simply activate Secure Boot on your VMs, and they will be provided with an appropriate set of default Secure Boot variables.

We will keep updating the default Secure Boot variables with future updates from Microsoft. If you don't want this behavior, you can lock in these variables by using the Manually Install the Default UEFI Certificates procedure.

So new vms nothing is needed to be done. But what about existing vms windows or linux? It it was stated I apologize if i missed it.

dinhngtu

@acebmxer The Recommended actions section of the guest Secure Boot docs has been updated with our latest recommendations. In short, VMs existing prior to the varstored update will need to have their Secure Boot certificates updated with the Propagate certificates button.

acebmxer

@dinhngtu thank must have read that part with my eyes closed or something.

stormi

@marcoi I don't have enough context to reply. You should open a new thread to discuss it, with details about your needs (always better to explain the needs before the technical solution).

shorian

Is there any intent to publish the latest xcp-ng 'release' with an XOSTOR iso ? There's an iso for the non-XOSTOR version (xcp-ng-8.3.0-20250606.2.iso) released on 18 Dec 2025, but the latest iso with xostor comparability is xcp-ng-8.3.0-20250616-linstor-upgradeonly.iso released in 16 June 2025.

Reason for asking is the last incremental upgrade on 18th Dec partially failed on our pool master and so we need to do a 'clean' upgrade, however there are XOSTOR disks on that machine, and doing a network upgrade after a partial failure and regardless with xostor - is not advised / achievable.

Thank you!