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  • All Xen related stuff

    616 Topics
    6k Posts
    A
    @laszlobortel we've seen far less of this issue since my last message, not sure what made it better and when. But we're still making sure to reboot monthly (during patching, as we normally do anyways) + after live migration, and that helps. We don't use load balancing, so once a VM is staying put on one hypervisor, there is no issue. Live migration and time triggers the issue for us. What changed in our infra is upgrade to XCP-NG 8.3 and moving to XOSTOR as shared storage. We've seen no issue with AlmaLinux 9 and CloudLinux 9 at all. They also perform better I/O wise.

  • The integrated web UI to manage XCP-ng

    29 Topics
    369 Posts
    acebmxerA
    @pdonias confirmed... [image: 1780065202934-screenshot-2026-05-29-103255.png]

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

    126 Topics
    1k Posts
    C
    Hi, everyone Thank you for your help. I had a flux that was blocked by our firewall. The button worked after that. But it doesn't explain why I lost this configuration and had to reinstall it. Thanks again.

  • Hardware related section

    169 Topics
    2k Posts
    poddingueP
    That leftover NIC is probably a stale PIF that XAPI is still holding, even though the card is physically gone, and the Refresh button re-scans rather than removing it. The docs have proper "remove a physical NIC" steps that end in forgetting the old PIF with xe pif-forget: https://docs.xcp-ng.org/networking/#remove-a-physical-nic. For the GPU side, the PCI passthrough flow (hiding the device from dom0, then assigning it) is here: https://docs.xcp-ng.org/compute#detaching-a-pci-device. If the GPU still won't show up as assignable once the stale PIF is gone, it might be worth a mention to @Team-Hypervisor-Kernel.

  • The place to discuss new additions into XCP-ng

    253 Topics
    3k Posts
    nathanael-hN
    @pszelestey Hi, yes, we've pushed an initial commit and a few more here https://github.com/vatesfr/cluster-api-provider-vates/ it is moging every day. Ping us in Matrix/Discord devops if you want to chat live while trying
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  • S

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

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    8 Posts
    2k Views
    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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    5 Posts
    792 Views
    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

    Solved
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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

    Solved
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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: 1733066154172-xcp-ntp2.png]
  • C

    Cloning Windows VMs

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    5 Posts
    835 Views
    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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    W
    @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: 1732291273907-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.
  • J

    Error migration

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    olivierlambertO
    I'm not aware of such problem it's like the VM was kept in limbo. You did the right thing with your commands.
  • M

    Can pass through all NICs except one

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    1 Posts
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    No one has replied