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  • All Xen related stuff

    627 Topics
    6k Posts
    H
    @dinhngtu said: dinhngtu VATES 🪐 XCP-NG TEAM a day ago @hrvojer There are many bugs in older versions of the Xen PV drivers. I suggest running Windows without guest tools and drivers if you can take the performance and functionality hit (no suspend/migration on UEFI VMs, no metric reporting, etc). Thanks @dinhngtu, appreciated. Running without PV drivers is hard for us: this is an I/O-heavy production SQL Server and we already had timeout problems before adding RAM, so I'm worried emulated disk performance would hurt more than an occasional crash. Our medium-term plan is to migrate SQL to a new VM with a supported Windows Server and current tools. Until then, a few follow-up questions: Is there any official place to still get XenServer VM Tools 9.2.3 (or whichever last version works on 2012 R2)? Would an older XCP-ng PV driver release (e.g. 8.2.2.200) likely be any better here, or is it the same xenvbd code base? One more detail I missed: in the same Feb 2026 change we also enabled "Lock Pages in Memory" for the SQL Server service account (together with 16 -> 64 GB RAM). Is there any known issue between old xenvbd and locked pages / large guest memory? Meanwhile we've capped SQL max server memory at 32 GB as a stopgap.

  • The integrated web UI to manage XCP-ng

    29 Topics
    367 Posts
    olivierlambertO
    The same as @john.c and also XO Lite tends to be less a priority because less critical than the full fledged XO (the priority is to replace entirely XO 5 in the next releases). Why you would need XO Lite outside basic actions? It's mostly meant to bootstrap XO itself and do basic operations (which is already the case, at least with many basic features already). Initially, the goal hasn't moved: replacing XenCenter. We are moving in that direction, but again, I think it's more important to get XO 6 finished first. I'm curious to understand more the use case of XO Lite in your context @unreal-shizzle ?

  • Section dedicated to migrations from VMWare, HyperV, Proxmox etc. to XCP-ng

    132 Topics
    1k Posts
    J
    @mpiton Thanks for a fantasticly quick answer, and detailed as well. I will test this immediately! Update: I can confirm that this was indeed the problem!

  • Hardware related section

    178 Topics
    2k Posts
    S
    @yannsionneau Yes it works Thank you very much, great job Tested on Ryzen 9 9950X / AMD Raphael iGPU Tested the new experimental iGPU passthrough packages. - CPU: AMD Ryzen 9 9950X - iGPU: AMD Raphael (1002:13c0) - XCP-ng: 8.3 - Guest: Bazzite AMD - VBIOS: extracted from the ACPI VFCT and supplied as /root/vbios.bin - iGPU passthrough: working - AMD amdgpu driver: working - Physical HDMI output: working - Bazzite desktop displayed successfully on the physical HDMI port. Ubuntu 24.04.2 was able to initialize the GPU and Vulkan/RADV detected the Raphael iGPU, but the HDMI output went black when the graphical desktop started. Bazzite worked and provided a stable display output. So on my Ryzen 9 9950X, the experimental packages appear to successfully enable Raphael iGPU passthrough and physical HDMI output.

  • The place to discuss new additions into XCP-ng

    255 Topics
    3k Posts
    dicode-nlD
    New version: https://github.com/dicode-nl/xcp-ng-ceph-rbd/releases/tag/v20260903 This one includes native Ceph rbd SXM over SMAPIv3! GitHub updated with the latest commits and changes. As always, use with caution. I did run a lot of test scenario's but please do test yourself and let me know your findings!
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  • I

    Openstack vs xcp-ng (XO)

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    I
    @olivierlambert got it.
  • A

    XCP-ng host - Power management

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    A
    @tjkreidl We don't need performance, but we do need to test how XCP-ng pools, networking, migration, live migration, backup, import from VMware and so on work. It's just a playground where we can have relatively many XCP-ng hosts, but it's not about performance, it's about efficiency and low requirements, because it's just a playground where we learn, validate how things work, and prepare the process for the final migration from VMware to XCP-ng. We originally had two R630s ready for this, then 4, but that would have been unnecessary, given the power consumption, to have physical hypervisors, so in the end we decided to virtualize it all. Well, on ESXi it's because XCP-ng works seamlessly there in nested virtualization.
  • S

    XenServer VM Fails to Start - HeadersTimeoutError & Hotplug.Device_timeout(_) After Power Outage

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    S
    @spcmediaco FYI, I never figured out how to fix. I am doing backup recovery now.
  • S

    Backup fails with "Body Timeout Error", "all targets have failed, step: writer.run()"

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    julien-fJ
    @Bambos A timeout error means that the host did not reply in the expected delay, which, if I'm remembering correctly is 5 minutes. I suspect a problem on your host but we will take a look further on your support ticket.
  • T

    GRUB waits for confirmation

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    J
    @techknowbabble said in GRUB waits for confirmation: What did finally work was re-installing with the 'no serial' option and everything seems to be working as expected now. I only have a handful of XCP-NG installations under my belt but I wonder if this is a known bug or if anyone else has had a similar experience. It's not something I've ever seen before and I've done quite a few installations but I can think of some possibilities as to why something like that might fix the problem. My best guess is that there's something built into, connected to, or otherwise in your system that looks like a serial port (maybe even a real serial port) that spits out a character or two into the system at boot time, confusing GRUB and stopping the normal boot process. The bad KVM I mentioned before was doing something like that, throwing a bogus keypress into the system at boot time.
  • P

    Wide VMs on XCP-ng

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    planedropP
    @plaidypus Ah gotcha, this makes sense. I second scaling out instead of up. If you're getting new hosts, I'd also keep in mind newer CPUs do have much higher per core performance (not sure what your current stuff is), so you also might be able to get away with less vCPUs and lower likelihood of NUMA spanning. Either way though I think scaling out is the better direction to go.
  • S

    This topic is deleted!

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  • H

    VM cannot be migrated after NICs of one host died

    Solved
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    DanpD
    @hansve You're welcome.
  • K

    block tdc: sector-size: 512/512 capacity: 20938752

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    K
    @apz I see. Thanks.
  • R

    Server Locks Up Periodically with ASRock X570D4I-2T AMD Ryzen 9 3900X and Intel X550-AT2

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    daveD
    @R2rho yeah, there are Supermicro systems with AM5 which can handle a decent amount of load, like based on the h13sae-mf, like: https://www.supermicro.com/de/products/system/mainstream/1u/as-1015a-mt (with less depth) Seem to be stable, but we have a small issue regarding onboard graphics ATM: https://xcp-ng.org/forum/topic/9976/black-screen-after-install-on-supermicro-h13sae-mf-with-ryzen-9950x/3?_=1734419502978
  • D

    VM not booting after attaching GPU

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    DanpD
    You should start by checking the logs. https://docs.xcp-ng.org/troubleshooting/log-files/
  • ?

    XCP-ng v8.3 Host Crashing Upon Console Login and Performing Any Action

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    bleaderB
    Thanks for letting us know, and I'm happy you have thing working nicely now. I think to mark this as resolved you need to convert your original post as a question, and it can then be marked as resolved. I actually cannot do it myself, I think only a few people have the permission to do it for others at Vates.
  • C

    Change VM RAM

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    olivierlambertO
    Enjoy XO & XCP-ng then
  • C

    host time and xoa time are not consistent with each other

    Solved
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    C
    @olivierlambert I resolved it, logged in the XCP-ng console and set the NTP servers to default. All good now. Thanks [image: xcp-ntp2.png]
  • C

    Cloning Windows VMs

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    D
    Preferably after, since the PV drivers contain some VM-specific settings that may be wiped by Sysprep.
  • W

    Issues with XCP-ng Windows PV Tools 9.0.9000.0 Testsign Pre-release

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    @dinhngtu said in Issues with XCP-ng Windows PV Tools 9.0.9000.0 Testsign Pre-release: With 9.0.9000.0, you could sometimes run into this issue if you reboot too early after installing. This will also be fixed in the next release. I just did two more tests and the boot-up failure happened both times. On the last test I waited some time (like 30 to 60 sec) after the driver installation before rebooting (using Windows restart from the start menu). Even though I waited before rebooting I still encountered the boot-up problem: Windows is spinning on this screen and doesn't finish booting: [image: ef30a370-5897-41e6-a0f1-41fa3720dacb-image.png]
  • M

    Best way for automatic creation of Linux FDE VMs with secure boot and VTPM using IaC

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    olivierlambertO
    I wasn't aware of this plugin even existing (thanks for the discovery). I'm not sure it's really maintained, but we have a clear goal of getting one officially maintained anyway.
  • G

    Windows Admin Center extensions for XCP?

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    G
    @olivierlambert Which one, powershell or WAC. They are kind of one in the same when you look at how WAC makes the calls to do the work, there's a button to reveal the powershell behind the button clicks so you might be able to get both at once. But WAC draws nice graphs and gives us a GUI to get the work done. Yes I know, real Admins don't use GUI. Whatever, AI will eat our jobs anyway, just trying to stick it out another 9 years at this point. When I get time, I'll still probably take a swing at this task for WAC, because to me this would be valuable. Big learning curve though. Now if MS would finally add Group Policy to WAC and fix some of the DHCP and DNS features that are still in preview...
  • D

    xenserver - net 9.1.7.65 issues

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    D
    @dinhngtu Ah thank you! Idk why I couldn't find that on my own, I searched for a while.
  • M

    Xapi service missing

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    DanpD
    According to the documentation, you only need xfsprogs.