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  • stormiS

    XCP-ng 8.3 betas and RCs feedback 🚀

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    stormiS
    This is the end for this nice and useful thread, as XCP-ng 8.3 is not a beta nor a RC anymore: it's a supported release now. However, we still need your feedback, as we publish update candidates ahead of their official release, for users to test them. Right now, there's a security update candidate which is to be tested. I strongly invite everyone who is currently subscribed to this thread to now subscribe to the new, dedicated thread: XCP-ng 8.3 updates announcements and testing, and to verify that their settings allow sending notification e-mails and/or other forms of notification.
  • stormiS

    XCP-ng 8.2 updates announcements and testing

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    olivierlambertO
    Updated our own prod via XO RPU, everything is working fine
  • olivierlambertO

    XOSTOR hyperconvergence preview

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    BlueToastB
    @Danp Success this this - thanks for the assist. Executed with great success: yum install xcp-ng-linstor yum install xcp-ng-release-linstor ./install --disks /dev/nvme0n1 --thin
  • olivierlambertO

    CBT: the thread to centralize your feedback

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    @rtjdamen Thank you for your hint! I indeed did not enable NBD on my management interface. Somehow I did not notice that in the docs. Maybe it would be a helpful for others to mention in the docs that you need to enable NBD in: a.) the network settings b.) the vm disc settings and c.) the actual backup task in order to work. Thank you again for your quick help!!!
  • olivierlambertO

    VMware migration tool: we need your feedback!

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    On vmware u would need als vcenter for this kind of features. And as u can easy deploy an empty xoa, why would this be an issue?
  • stormiS

    XCP-ng 8.3 public alpha 🚀

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    stormiS
    We just released XCP-ng 8.3 beta 1 ! I opened a new thread for us to discuss it and for you to provide feedback: https://xcp-ng.org/forum/topic/7464/xcp-ng-8-3-beta Thanks for all the feedback already provided here, and see you on this new thread! In order not to miss anything (and, let's be honest, for me to be sure that messages on the new thread reach you all), the best course of action is: open the new thread right now and use the "watch" button. [image: 1687457779384-53fac025-6e0c-465b-97ab-5ca73a97bd93-image.png] And let's answer this common and legitimate question: how to upgrade from alpha to beta ? Well, there's nothing to do, just update as usual. In fact, you might already be in beta state. However, as indicated in the blog post, we need a lot of testing of the installer, so it's also an option to start from the installation ISO again.
  • N

    Epyc VM to VM networking slow

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    olivierlambertO
    Our most promising lead is that's due to the fact they do not have a feature Intel got, called iPAT. In very short (and probably too short to be entirely correct), is the fact that the grant tables in the guest (used to securely communicate between -in that case- the VM and the Dom0) is not cached by AMD CPU. And on AMD, there's no way to force a cache attribute on a guest memory access, unlike with Intel. So the grant table requests are not cached on AMD vs Intel, explain at least a part of the performance difference. What's next? Roger from Xen project pointed us in that direction, and he did a very crude patch that demonstrated that we tested internally, showing that's a promising lead (x5 perf in VM->Dom0 and near twice between VMs). Right now, we have multiple people working internally to make a "real" patch or at least something to "workaround" the issue if possible. So it's been few weeks since then, we are trying to figure (at Vates, again) what would be the best approach for AMD CPUs, to make a patch that could land upstream.
  • daveD

    Alert: Control Domain Memory Usage

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    Its not solving it, but you can run echo 3 > /proc/sys/vm/drop_caches to release some of the cache again, without interfering with running processes. [root@host2 ~]# free -m total used free shared buff/cache available Mem: 15958 3308 158 8 12491 2355 Swap: 1023 177 846 [root@host2 ~]# echo 3 > /proc/sys/vm/drop_caches [root@host2 ~]# free -m total used free shared buff/cache available Mem: 15958 3308 2598 10 10051 2751 Swap: 1023 177 846
  • olivierlambertO

    Introduce yourself!

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    nikadeN
    @john-c said in Introduce yourself!: @TS79 said in Introduce yourself!: Hi. I'm a cloud solutions architect, with around 25 years of working experience in servers, storage, networking (your typical infrastructure stuff) and about 20 years of virtualisation. I started up a homelab many years ago, and through (too) many evolutions, I've ended up with Lenovo M710q mini PCs running XCP-ng, with another mini PC providing NFS storage (with backup and replication to cater for problems and failures). Absolutely love XCP-ng and am promoting it wherever I can. I've architected and kicked off a project at my employer to replace VMware with XCP-ng, so I'm keen to use the forum to read other people's real-world experiences with storage and host specs, hurdles to avoid, and any tips & tricks. Looking forward to interacting with the community more and more. When checking out Xen Orchestra make sure to look at both the Host Maintenance Mode and the SR Maintenance Mode. I came up with the idea for the SR Maintenance mode during the Covid-19 lock down in the UK. The Vates staff developed and implemented the idea, I pitched it as a useful tool for large infrastructures. The reason being that pools (especially large ones) can have multiple shared storage implemented as SRs. The maintenance mode for SR permits, some of the SR to be put in maintenance mode when the backing separate bare metal hardware is in maintenance, while keeping others not in this situation active. So your less likely to need to put the host in maintenance mode, thus improving pools which are using HA, increasing the up time further. So the VMs aren't affected, when the VMs have been migrated to another storage SR, thus aiding in reducing down time for the VMs. This is a great feature, but I havent used it - How does it work? Is it something like: You put the SR in maintenance mode VM's are migrated to another shared SR Notification about SR maintenance completed?
  • olivierlambertO

    New Rust Xen guest tools

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    D
    @kevdog @yann said in New Rust Xen guest tools: @kevdog great news, looking forward for this PKGBUILD! Wouldn't it make sense to build from release packages rather than from Git? The CI scripts should give you some guidance. For dependencies you should have a list at https://gitlab.com/xen-project/xen-guest-agent#build-requirements. Not sure why you would want python-setuptools? Hey all, I put together PKGBUILD for Arch which pulls the latest git. It seems to be working fine for me. You'll need to install xen package on AUR. https://aur.archlinux.org/packages/xen-guest-agent-git It's my first attempt at submitting something on AUR. I look forward to any feedback.
  • stormiS

    XCP-ng 8.3 updates announcements and testing

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    @ThierryEscande I ran the update and it's passing good data (on an older card that worked before).
  • olivierlambertO

    Netdata package is now available in XCP-ng

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    ForzaF
    @grapesmc at one point I had the idea to set up a xcp-ng build environment and build netdata in there, then simply copy it over to the xcp-ng hosts. Unfortunately I was not able to dedicate the time to this so far.
  • stormiS

    XCP-ng 8.0.0 Beta now available!

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    olivierlambertO
    When you boot in UEFI mode, press "e" to edit the boot command line, you have a line to change the memory for dom0.
  • N

    Non-server CPU compatibility - Ryzen and Intel

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    Largely depends on your homelab. I'm currently in my homelab using a 3970X Threadripper But, I got that board/chip free after we did a client upgrade to the new Threadrippers, and there isn't a single amount of money I could save on energy to match that savings. That said, think about what you need to use your homelab configuration for; I often find that the availability of RAM and total available cores. But I guess different needs matter too..
  • AlexanderKA

    Nested Virtualization of Windows Hyper-V on XCP-ng

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    @stormi said in Nested Virtualization of Windows Hyper-V on XCP-ng: Actually, Xen never officially supported Nested Virtualization. It was experimental, and broke when other needed changes were made to Xen. Now there's work to be done to make it fully supported, and this won't happen before the final release of XCP-ng 8.3. This will be documented in the release notes. This is also an issue for us internally as we create a lot of virtual pools for our tests. I read through a lot of the earlier posts and finally started scrolling to find this, which is the answer I was looking for. Why do I care? There is a Microsoft evaluation learning lab for things like Intune that runs in Hyper-V, basically a bunch of VHD (x) that get spawned as needed. Applications I need to teach myself. Running XCP-NG 8.3 current updates for this lab. If it doesn't happen, then I'll just need to throw an eval version of Windows Server on something else like an HP T740 to run these labs, not the biggest issue for me. Link for the labs if anyone is curious (free with an email registration like all the evals): https://www.microsoft.com/en-us/evalcenter/evaluate-mem-evaluation-lab-kit I'd think direct Docker support would be a higher priority than nested virtualization with a focus on Hyper-V. But that's just me.
  • Z

    XOA Error when installing

    Solved Xen Orchestra
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    G
    I did the manual installation via the XVA. It worked for me.
  • P

    Nvidia Quadro P400 not working on Ubuntu server via GPU/PCIe passthrough

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    I'm having similar issue with A400 on xcp-ng8.3 Proprietary driver fails with following message when running nvidia-smi : NVRM: GPU 0000:00:05.0: RmInitAdapter failed! (0x24:0x72:1568) [ 44.619030] NVRM: GPU 0000:00:05.0: rm_init_adapter failed, device minor number 0 [ 45.095040] nvidia_uvm: module uses symbols nvUvmInterfaceDisableAccessCntr from proprietary module nvidia, inheriting taint. [ 45.144703] nvidia-uvm: Loaded the UVM driver, major device number 241. system is actually loading the driver : [ 6.026970] xen: --> pirq=88 -> irq=36 (gsi=36) [ 6.027485] nvidia 0000:00:05.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=io+mem [ 6.029010] NVRM: loading NVIDIA UNIX x86_64 Kernel Module 550.144.03 Mon Dec 30 17:44:08 UTC 2024 [ 6.063945] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 550.144.03 Mon Dec 30 17:10:10 UTC 2024 [ 6.118261] [drm] [nvidia-drm] [GPU ID 0x00000005] Loading driver [ 6.118265] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:00:05.0 on minor 1 xl pci-assignable-list gives : 0000:43:00.0 0000:43:00.1 and gpu is assigned as passthrough,, but when listing test VM i have empty list of devices.. [23:06 epycrep ~]# xl pci-list Avideo-nvidia [23:35 epycrep ~]# Not sure if i want to try more before switching gpu to something else. Any hint where to look for ? Server is gigabyte g292-z20 wih epyc 7402p and single gpu for testing. IOMMU enabled.
  • RIX_ITR

    High Fan Speed Issue on Lenovo ThinkSystem Servers

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    @gduperrey (unrelated to this fan issue) I loaded the new standard 8.2 testing kernel on my NUC11 and it seems to boot a little faster and also no longer complains about some APIC devices.
  • olivierlambertO

    Our future backup code: test it!

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    olivierlambertO
    \o/
  • S

    Gpu passthrough on Asrock rack B650D4U3-2L2Q will not work

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    @steff22 said in Gpu passthrough on Asrock rack B650D4U3-2L2Q will not work: @ravenet Ok I think the pro gpu's work better without so many bugs. I switched to Nvidia RTX 4070. With the Nvidia gpu and this works as it should and gets an image on the screen on the first try. So there must be something wrong with the amd drivers plus that error with the amd reset bug I've setup a test system with a ryzen 7700x and a regular radeon 7600xt, non-pro gpu. Will let you know results. Shouldn't be an issue, it's same hardware and even the drivers work across them. Though they do have different bios on cards