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    • stormiS

      XCP-ng 8.3 updates announcements and testing

      Watching Ignoring Scheduled Pinned Locked Moved News
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      @dthenot said: @probain Hello, It's likely linked to the List index out of range bug. That bug was linked to the SR scan failing to introduce CBT_metatadata VDI in the XAPI database, could you try to launch a xe sr-scan uuid=<SR UUID> and try again to disable CBT? If it does not work, could you share the /var/log/SMlog of around the time you are trying to disable CBT? I've sent you a DM for sharing the logs.. Unfortunately I "solved" the issue by deleting all snapshots related to each VM. Including CBT ones. That did make it so I could toggle CBT on the VDIs again. But I've collected the logs for you. This also seems like a good time to raise my suggestion to have somewhere at vates where we could upload details in a similar way to how TrueNAS does it. Suggested here: https://feedback.vates.tech/posts/69/suggesting-to-add-a-debug-file-option
    • johnnezeroJ

      Tag-Based Automation: Manage VM CPU Priority via assigned tag.

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      tjkreidlT
      @johnnezero The full HTML versions will render much better. The PDF conversion is less than perfect. iIll try to get those uploaded, as well.
    • acebmxerA

      Some dashboard loading issues with v6

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      acebmxerA
      @simonp said: @acebmxer Hi, Thanks to your help we were able to identify an issue with Redis that we think is the source of the v6 dashboard loading issue. Could you try and checkout the fix_redis_encryption_issue branch, rebuild xo and restart ? This should solve the 401 issues. Switched back to Master branch and made some changes to my install script. add diagnostics for missing XO 6 web UI build artifacts Plain bash [[ -f ]] fails silently on unreadable paths owned by SERVICE_USER, causing false-positive missing-artifact warnings. Switch all file/dir tests and grep calls to use sudo. SUCCESS] Xen Orchestra built successfully [INFO] Build verification passed: dist — all JS chunks present. [INFO] Build verification passed: dist — all JS chunks present. [INFO] Creating systemd service... [SUCCESS] Systemd service created and enabled [INFO] Configuring sudo for xo-service (mount/umount/findmnt)... [SUCCESS] Sudo configured for xo-service (mount, umount, findmnt) [INFO] Applying security hardening... [INFO] Starting xo-server service... [INFO] Waiting for Xen Orchestra to become ready (up to 60s)... [INFO] Not ready yet (attempt 1/10), retrying in 6s... [SUCCESS] Xen Orchestra is ready (HTTPS on port 443) [SUCCESS] Update completed successfully! [INFO] New commit: 0f29421627c7 v6 Dashboard still loading correctly. Thank you for the fix.
    • AlexanderKA

      Nested Virtualization of Windows Hyper-V on XCP-ng

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      Thanks for that information. I will make this message short because @stormi is busy but I want to say thanks to Vates and XCP-ng for all their work done to support Windows on the Xen platform. This includes TPM2 and secure boot support and Microsoft-signed pv drivers. Well done!
    • olivierlambertO

      🛰️ XO 6: dedicated thread for all your feedback!

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      Afternoon, my session timed out and I do get the normal login page, but when I login I get this UiAlert Message: [image: 1779994906012-screenshot-from-2026-05-28-12-51-11.png] import{B as e,C as t,St as n,U as r,X as i,_ as a,g as o,h as s,m as c,t as l,x as u,xt as d}from"./_plugin-vue_export-helper-DqPMJZfB.js";import{n as f,t as p}from"./VtsIcon-BoVekVkM.js";import{t as m}from"./use-mapper-M_HHKN3j.js";import{t as h}from"./UiButtonIcon-Df9Z1TJo.js";var g={class:`content`},_={class:`alert typo-body-regular-small`},v={key:0},y=l(t({__name:`UiAlert`,props:{accent:{},close:{type:Boolean}},emits:[`close`],setup(t,{emit:l}){let y=l,b=i(),x=m(()=>t.accent,{info:`status:info-circle`,success:`status:success-circle`,warning:`status:warning-circle`,danger:`status:danger-circle`},`info`);return(i,l)=>(e(),a(`div`,{class:n([d(f)({accent:t.accent}),`ui-alert`])},[c(`div`,g,[u(p,{class:`information-icon`,name:d(x),size:`current`},null,8,[`name`]),c(`div`,_,[c(`div`,null,[r(i.$slots,`default`,{},void 0,!0)]),b.description?(e(),a(`div`,v,[r(i.$slots,`description`,{},void 0,!0)])):o(``,!0)]),t.close?(e(),s(h,{key:0,class:`close-button`,icon:`fa:xmark`,accent:`brand`,size:`small`,onClick:l[0]||=e=>y(`close`)})):o(``,!0)])],2))}}),[[`__scopeId`,`data-v-5b9f5cdd`]]);export{y as t}; ... and after back-paging, I was able to login normally.
    • J

      (Windows) guest IPv6 address doesn't collapse zeroes -> Long IPv6 addresses

      Watching Ignoring Scheduled Pinned Locked Moved Xen Orchestra
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      olivierlambertO
      Still, something to fix
    • johnnezeroJ

      Server Admin Guide: A Tale of Two Servers: BIOS, GPU, and NUMA Tuning for XCP-ng: Preserving the valuable work done by Tobias Kreidl (@tjkreidl)

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      tjkreidlT
      @poddingue I am confused is how your updated articles can be accessed somewhere on my main Github page. I only see them if I follow your "pull" link. What needs to be done to commit them? Thank you!
    • W

      VDI not showing in XO 5 from Source.

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      andrewperryA
      @Danp I was going to do the upgrade over the December / January Christmas break in Australia but that is when this issue became apparent so we didn't want to be making major changes until it was resolved. I note @anthoineb noted the first report was late August / September 2025 which was just before 8.2.1 reached EOL, so it would be a shame not to have a fix for it tested on 8.2.1 as it seems an upgrade to 8.3 would be unwise while we still have this issue?
    • A

      XenOrchestra not showing VM Disks on Pool (on single Server working) - XCP-ng Center is showing them

      Watching Ignoring Scheduled Pinned Locked Moved Xen Orchestra
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      Dug a little deeper. For a VM where the disks are not shown the following XO API call fails: /rest/v0/vms/a519e879-3971-9210-51b6-7df14336e7b7/vdis { "error": "no such VDI ac37700d-3157-4df7-b8e8-e1799a994591", "data": { "id": "ac37700d-3157-4df7-b8e8-e1799a994591", "type": [ "VDI" ] } } Also the VDI cannot be retrieved over the XO API: /rest/v0/vms/a519e879-3971-9210-51b6-7df14336e7b7 ... "$VBDs": [ "4ea8a3cd-0d1b-dc60-4d9c-fd70e060f06c", "9f4ca686-9fc2-35a9-c3e9-c871c9f68aba" ], ... /rest/v0/vbds/9f4ca686-9fc2-35a9-c3e9-c871c9f68aba { "type": "VBD", "attached": false, "bootable": false, "device": "xvda", "is_cd_drive": false, "position": "0", "read_only": false, "VDI": "ac37700d-3157-4df7-b8e8-e1799a994591", "VM": "a519e879-3971-9210-51b6-7df14336e7b7", "id": "9f4ca686-9fc2-35a9-c3e9-c871c9f68aba", "uuid": "9f4ca686-9fc2-35a9-c3e9-c871c9f68aba", "$pool": "93d361b7-f549-53b7-a3aa-c9695bf0abe4", "$poolId": "93d361b7-f549-53b7-a3aa-c9695bf0abe4", "_xapiRef": "OpaqueRef:1d424d94-f540-2eb4-9e52-2a9b21ec0a19" } /rest/v0/vdis/ac37700d-3157-4df7-b8e8-e1799a994591 { "error": "no such VDI ac37700d-3157-4df7-b8e8-e1799a994591", "data": { "id": "ac37700d-3157-4df7-b8e8-e1799a994591", "type": "VDI" } } However the VDI can be listed using the xe cli: $ xe vm-list uuid=a519e879-3971-9210-51b6-7df14336e7b7 uuid ( RO) : a519e879-3971-9210-51b6-7df14336e7b7 name-label ( RW): XXX power-state ( RO): halted $ xe vbd-list vm-uuid=a519e879-3971-9210-51b6-7df14336e7b7 uuid ( RO) : 4ea8a3cd-0d1b-dc60-4d9c-fd70e060f06c vm-uuid ( RO): a519e879-3971-9210-51b6-7df14336e7b7 vm-name-label ( RO): XXX vdi-uuid ( RO): <not in database> empty ( RO): true device ( RO): xvdd uuid ( RO) : 9f4ca686-9fc2-35a9-c3e9-c871c9f68aba vm-uuid ( RO): a519e879-3971-9210-51b6-7df14336e7b7 vm-name-label ( RO): XXX vdi-uuid ( RO): ac37700d-3157-4df7-b8e8-e1799a994591 empty ( RO): false device ( RO): xvda $ xe vdi-list uuid=ac37700d-3157-4df7-b8e8-e1799a994591 uuid ( RO) : ac37700d-3157-4df7-b8e8-e1799a994591 name-label ( RW): XXX Disk 0 name-description ( RW): Created by XO sr-uuid ( RO): 977b7e63-bb84-57b2-3e0d-206afea553bf virtual-size ( RO): 34359738368 sharable ( RO): false read-only ( RO): false Seems almost like something changed in the XCP-ng API which XO cannot consume.
    • P

      XO-Lite back to 0.19

      Watching Ignoring Scheduled Pinned Locked Moved Solved XO Lite
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      acebmxerA
      @pdonias confirmed... [image: 1780065202934-screenshot-2026-05-29-103255.png]
    • J

      Backups Fail with ENOENT: no such file or directory

      Watching Ignoring Scheduled Pinned Locked Moved Backup
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      J
      @pierrebrunet I inadvertently found more information yesterday. I installed an old e492b commit on a new machine, configured identically to the original, and got a different error but the same effect. The new error is: xcp xo backup Error: read ETIMEDOUT That lead me to this page: https://xcp-ng.org/forum/topic/10799/backup-timeout-error I moved the XO machine onto the same subnet as XCP, leaving the storage behind in a different network. This fixed the issue, at least on commit e492b ... I have not yet tried it on the new release... however I am pretty confident it will be successful. If I'm honest, I think this is a tuning issue between XO and XCP. XO is now mounting an NFS share across this subnet boundary and that mount is not having any sort of performance issue, but for some reason XO times out transferring the same data from dom0? That seems off to me. It's not a probem moving XO to the other subnet, so I've done that, but maybe this deserves a look in the future.
    • PoloGTIJauneP

      Build number cloud vs Build number 8.3.0

      Watching Ignoring Scheduled Pinned Locked Moved Solved French (Français)
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      olivierlambertO
      Ah excellente nouvelle Je passe le sujet en résolu !
    • J

      [Solved] SR_SOURCE_SPACE_INSUFFICIENT - Problems enabling HA

      Watching Ignoring Scheduled Pinned Locked Moved Solved XCP-ng
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      J
      @olivierlambert Thanks again for your input and recomendations! I'll verify that this is solved by having the LUN expanded to 8GB instead. Afterwards I'll mark your answer as the solution!
    • V

      Question about pools

      Watching Ignoring Scheduled Pinned Locked Moved XCP-ng
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      @vlamincktr XO PROXY from source is pretty reliable at no cost either use @acebmxer script or @ronivay here is a quick tuto on an ubuntu VM https://omnibox.huducloud.com/shared_article/QJ9y1bRSPj9VTbWp6NKaV7yn/installation-xoa-a-partir-des-sources-github-ronivay first part is XO CE, second part is XO PROXY CE beware as you delegate some jobs to XO PROXY, to ever upgrade XO PROXY when you upgrade XOA, so that they have the same backup mechanisms/code
    • N

      Create a new SR: qcow2 failure

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      @florent said: where does this disk comes from From my Redhat 10 @florent said: if you have access to your SR from the outside, you can also put the qcow2 file directly I create a VM to be a NFS to access the 3 HDs, the qcow disks are on the Redhat 10 that I was trying to import from. Do you mean I put the qcow disks on one of the HDs and access them when I create a VM?
    • P

      broken backup in XOA 6.5 ? orphan VDI Directory, not referenced by any backup

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      @acebmxer had a combo error on some VMs "fell back to full" and "not referenced by any backup" but no tranfer size either. can't screenshot it anymore, I did a rollback to XOA 6.3 for the time being, snapshoted just before the upgrade
    • B

      Adding new host to pool fails - Stunnel SSL certiticate verification failure

      Watching Ignoring Scheduled Pinned Locked Moved XCP-ng
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      LucienLassalleL
      @semarie I'll try to investigate to help you. Is it possible to run: stat /etc/xensource/xapi-pool-tls.pem openssl x509 -in /etc/xensource/xapi-pool-tls.pem -noout -text stat /etc/xensource/xapi-ssl.pem openssl x509 -in /etc/xensource/xapi-ssl.pem -noout -text (This file must exist; if not, I'd like the output of cat /etc/stunnel/xapi.conf.) And I'd like the same output for /etc/xensource/xapi-ssl.pem. If the certificate for /etc/xensource/xapi-pool.tls.pem has expired or it's empty, you can run: xe host-refresh-server-certificate host=$(hostname) If the certificate for /etc/xensource/xapi-ssl.pem has expired or it's empty, you can run: xe host-emergency-reset-server-certificate After running one of the two commands above, I recommend to do: xe-toolstack-restart (This should indeed restart the stunnel@xapi.service) I hope this helps.
    • D

      xe-gues-utilities woes on openSUSE Leap 16

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      D
      @MajorP93 that’s fine - I never use ballooning anyway so I guess I am covered good
    • Tristis OrisT

      Continuous replication auto start

      Watching Ignoring Scheduled Pinned Locked Moved Solved Backup
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      julienXOvatesJ
      @tonyp90 great, thanks !
    • LoTus111L

      Slow Backups | XOA Performance Test – Upgrading from 2 vCPU to 4 vCPU / 8GB RAM

      Watching Ignoring Scheduled Pinned Locked Moved Backup backup xoa performance
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      florentF
      the last rewrite of the stream processing ( spring 2025 ) focused on stability and memory footprint, and , on a standard cpu, it tops at around 300MB/s per backup job. Your benchmarks are very interesting, and they confirm most of it. this limit was not really an issue since, in most case the xapi was limiting around 100MB/s per disk , but it will be more a more visible limit Note that master have some fixes on the memory usage (not related to backups) That's why we have started an internal workforce focused on performance, with all the teams from the kernel to the backups, including storage, network and xapi. If I can brag a little : [image: 1779106650898-afd7b59b-a4f0-4a92-88ee-2c7ba52d18bf-image.jpeg] i9 , nvme disk , backup to a nvme disk in passthrough, xoa and vm are on the same host, so it's quite far from real world data, but it shows where the limit is