XCP-ng 8.3 updates announcements and testing
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XCP-ng 8.3 LTS Updated installer ISO
The installer ISO has been refreshed with up date packages already published.
The image can be downloaded from:
https://repo.vates.tech/tmp/xcp-ng-8.3.0-20260709.testing.iso
The procedure to install XCP-ng 8.3 remains the same.
The refreshed installer ships updated Xen, Linux kernel and some drivers/firmware, which help with deploying XCP-ng 8.3 on hardware that needs changes introduced by updates not present in previous ISO image releases.
This refreshed ISO has been validated on a subset of supported hardware. Additional testing on any hardware from the community would be greatly appreciated.
As with previous installer releases, it can be used to upgrade XCP-ng from a previous major release (8.0, 8.1 or 8.2). Refer to the Upgrade documentation. For existing XCP-ng 8.3 installations, thereβs no need to use this ISO image. Regular yum updates achieve the same results as a fresh installation with that ISO image.
Installer improvements include minor enhancements related to software RAID1 support for the system disks, including support for more than 2 disks in the RAID1 array if anyone really wants that.
New maintenance update candidates for XCP-ng 8.3 LTS
This release batch includes a VBD leak regression fix in XAPI and minor changes needed to build the installer ISO.
A regression was introduced to the
VM.revertoperation inxapi-26.1.4-3.3, which left VBDs attached to the VM when they are not present in the reverted-to snapshot (instead of destroying such VBDs, as was done before).VMs that were reverted to their snapshots after
xapi-26.1.4-3.3may have such "leftover" VBDs. Advanced users can use the leaked_vbds script to detect possible cases in your pools. Sadly, there is no way to automatically distinguish a VBD that was created after a VM.revert from a VBD that survived the VM.revert, so this script relies on the user to determine if the suspicious VBDs are indeed affected or not.What changed
Control Plane
xapi: Fix non-snapshotted VBDs staying attached after VM.revert
Versions
xapi: 26.1.11-1.2.xcpng8.3 -> 26.1.11-1.3.xcpng8.3xcp-ng-release: 8.3.0-37 -> 8.3.0-38
Test on XCP-ng 8.3
yum clean metadata --enablerepo=xcp-ng-testing,xcp-ng-candidates yum update --enablerepo=xcp-ng-testing,xcp-ng-candidates rebootThe usual update rules apply: pool coordinator first, etc.
What to test
As usual, normal use and anything else you want to test.
Test window before official release of the updates
~5 days
We would like to thank users who shared feedback since our last call for testing: @Andrew, @XCP-ng-JustGreat, @acebmxer, @bufanda, @flakpyro , @marcoi.
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Just tried to apply update. Unable to put master host into maintenance mode - not enough memory...
https://xcp-ng.org/forum/post/106814
Edit - Updated both host after manually migrating the vms. Also noticed when i thought i was updating the master host first it might not have been.
With Twinstore installed and enabled HA was also enabled. After first host came back on line i looked at the pool advanced settings and saw host 2 was master not host 1.
Both host have been updated and rebooted. @olivierlambert would this change post master from one host to the other? XO did loose access to the VMs while the first host rebooted. So i am alittle confused...
Once host 2 came back online pool master is switched back to host 1 again...
will look for any other odd things.
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Is there something specific needed for the leaked_vbds script?
When i run it i get:
[09:37 xcpng-prd-01 ~]# ./leaked_vbds Traceback (most recent call last): File "./leaked_vbds", line 23, in <module> snap = xapi.VM.get_parent(snap) File "/usr/lib/python3.6/site-packages/XenAPI.py", line 317, in __call__ return self.__send(self.__name, args) File "/usr/lib/python3.6/site-packages/XenAPI.py", line 198, in xenapi_request result = _parse_result(getattr(self, methodname)(*full_params)) File "/usr/lib/python3.6/site-packages/XenAPI.py", line 292, in _parse_result raise Failure(result['ErrorDescription']) XenAPI.Failure: ['HANDLE_INVALID', 'VM', 'Ref:29'] -
@flakpyro I'll add some additional error-checking, but looks like you're affected by the
snapshot_ofissue and should run another script (yes, I know...) to fix these stale references: https://github.com/xcp-ng/xcp/blob/master/scripts/snapshot-fixer.py -
Thanks
I ran that second script on the master and it did indeed find entries:
./snapshot-fixer.py rewrite INFO:root:Check HA... INFO:root:Shutting down xapi... INFO:root:Regenerating database... INFO:root:The VM d6befe36-fea7-04f3-25f1-feada684702b has Ref:9 as its "snapshot_of" value, changing to null. INFO:root:The VM e013d9ed-63b1-9c9f-a228-d48a6047688c has Ref:89 as its "snapshot_of" value, changing to null. INFO:root:The VM 060df7ee-8af4-4c93-8265-bfa3024ccacd has Ref:1 as its "snapshot_of" value, changing to null. INFO:root:The VM da7b6ff6-d722-2120-7cc4-a1e0038a216e has Ref:307 as its "snapshot_of" value, changing to null. INFO:root:The VM 4178b057-efee-427e-bcad-67323419ac7a has Ref:9 as its "snapshot_of" value, changing to null. INFO:root:The VM 8d624e49-ca99-4af6-b17c-38cad0646194 has Ref:1 as its "snapshot_of" value, changing to null. INFO:root:The VM dc72da43-f144-3343-5ee5-a0dbffd209f6 has Ref:251 as its "snapshot_of" value, changing to null. INFO:root:The VM e8c6376b-49e1-422b-551a-35420f70af2a has Ref:8 as its "snapshot_of" value, changing to null. INFO:root:The VM 25eb14ab-e943-0d18-2137-c681e1191346 has Ref:11 as its "snapshot_of" value, changing to null. INFO:root:The VM 6f819166-b008-4a03-a692-fcbd75018be9 has Ref:1 as its "snapshot_of" value, changing to null. INFO:root:The VM 9d1a57e8-3531-4b55-9682-f775215866df has Ref:1 as its "snapshot_of" value, changing to null. INFO:root:The VM 0ac88f7c-d79b-281e-cf1f-a2392ba594ed has Ref:29 as its "snapshot_of" value, changing to null. INFO:root:The VM 1f3541c4-8c81-4959-9cbe-edbec9481220 has Ref:1 as its "snapshot_of" value, changing to null. INFO:root:Writing database to /var/lib/xcp/state.db INFO:root:Starting up xapi...after which it shows clean now:
./snapshot-fixer.py dry-run INFO:root:Regenerating database...However i am still getting the same error when trying to run leaked_vbs:
./leaked_vbds Traceback (most recent call last): File "./leaked_vbds", line 23, in <module> snap = xapi.VM.get_parent(snap) File "/usr/lib/python3.6/site-packages/XenAPI.py", line 317, in __call__ return self.__send(self.__name, args) File "/usr/lib/python3.6/site-packages/XenAPI.py", line 198, in xenapi_request result = _parse_result(getattr(self, methodname)(*full_params)) File "/usr/lib/python3.6/site-packages/XenAPI.py", line 292, in _parse_result raise Failure(result['ErrorDescription']) XenAPI.Failure: ['HANDLE_INVALID', 'VM', 'Ref:29'] -
@rzr Updates installed and running. I also run the
snapshot-fixer.pyandxapi_leaked_vbds.pyscripts... The fixer found/fixed lots on many pools...@andriy.sultanov I have the same error... On one pool, I ran
snapshot-fixer.pyand it fixed about 50 of them, butxapi_leaked_vbds.pystill returns an error (before and after fix):Traceback (most recent call last): File "./xapi_leaked_vbds.py", line 23, in <module> snap = xapi.VM.get_parent(snap) File "/usr/lib/python3.6/site-packages/XenAPI.py", line 317, in __call__ return self.__send(self.__name, args) File "/usr/lib/python3.6/site-packages/XenAPI.py", line 198, in xenapi_request result = _parse_result(getattr(self, methodname)(*full_params)) File "/usr/lib/python3.6/site-packages/XenAPI.py", line 292, in _parse_result raise Failure(result['ErrorDescription']) XenAPI.Failure: ['HANDLE_INVALID', 'VM', 'Ref:119'] -
@Andrew @flakpyro I've updated the script, could you try running it again?
https://gist.github.com/last-genius/edf7dab3b1847ec5bb1d9917996eba41
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@andriy.sultanov No error... returns nothing.
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@Andrew That means you likely don't have any "leaked" VBDs
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Running it now shows no error! And no output so looks like i have no issues!
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@rzr Since the targeted test window is over by now, I wonder: what are your plans regarding this set of patches? Will it be released soon?
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@rzr Since the targeted test window is over by now, I wonder: what are your plans regarding this set of patches? Will it be released soon?
yes this is the plan, we're a bit slower this time because the iso publication is a longer process, but afaik no issue are spotted so far, thank you for your patience.
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We pushed the tested packages along a xen security update to the xcp-ng-updates repository, check blog post for summary and related advisories:
https://xcp-ng.org/blog/2026/07/28/july-2026-updates-1-for-xcp-ng-8-3-lts/ -
@rzr Thanks! How long does it take for these patches go be available?
[17:00 xcpng01 ~]# yum update Geladene Plugins: fastestmirror Loading mirror speeds from cached hostfile Excluding mirror: updates.xcp-ng.org * xcp-ng-base: mirrors.xcp-ng.org Excluding mirror: updates.xcp-ng.org * xcp-ng-updates: mirrors.xcp-ng.org No packages marked for update//EDIT: Nevermind. After running yum clean metadata they are being picked up.
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We pushed the tested packages along a xen security update to the xcp-ng-updates repository, check blog post for summary and related advisories:
https://xcp-ng.org/blog/2026/07/28/july-2026-updates-1-for-xcp-ng-8-3-lts/Just updated my homelab hosts.
[10:45 xcp-ng-disjqdnc ~]# yum clean metadata Loaded plugins: fastestmirror Cleaning repos: xcp-ng-base xcp-ng-updates 6 metadata files removed 4 sqlite files removed 0 metadata files removed [10:45 xcp-ng-disjqdnc ~]# yum update Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Excluding mirror: updates.xcp-ng.org * xcp-ng-base: mirrors.xcp-ng.org Excluding mirror: updates.xcp-ng.org * xcp-ng-updates: mirrors.xcp-ng.org xcp-ng-base/signature | 473 B 00:00:00 xcp-ng-base/signature | 3.0 kB 00:00:00 !!! xcp-ng-updates/signature | 473 B 00:00:00 xcp-ng-updates/signature | 3.0 kB 00:00:00 !!! (1/2): xcp-ng-base/primary_db | 3.9 MB 00:00:00 (2/2): xcp-ng-updates/primary_db | 1.6 MB 00:00:01 Resolving Dependencies --> Running transaction check ---> Package xen-dom0-libs.x86_64 0:4.17.6-9.3.xcpng8.3 will be updated ---> Package xen-dom0-libs.x86_64 0:4.17.6-9.3.1.xcpng8.3 will be an update ---> Package xen-dom0-tools.x86_64 0:4.17.6-9.3.xcpng8.3 will be updated ---> Package xen-dom0-tools.x86_64 0:4.17.6-9.3.1.xcpng8.3 will be an update ---> Package xen-hypervisor.x86_64 0:4.17.6-9.3.xcpng8.3 will be updated ---> Package xen-hypervisor.x86_64 0:4.17.6-9.3.1.xcpng8.3 will be an update ---> Package xen-libs.x86_64 0:4.17.6-9.3.xcpng8.3 will be updated ---> Package xen-libs.x86_64 0:4.17.6-9.3.1.xcpng8.3 will be an update ---> Package xen-tools.x86_64 0:4.17.6-9.3.xcpng8.3 will be updated ---> Package xen-tools.x86_64 0:4.17.6-9.3.1.xcpng8.3 will be an update --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================ Package Arch Version Repository Size ============================================================================================================================================ Updating: xen-dom0-libs x86_64 4.17.6-9.3.1.xcpng8.3 xcp-ng-updates 704 k xen-dom0-tools x86_64 4.17.6-9.3.1.xcpng8.3 xcp-ng-updates 2.0 M xen-hypervisor x86_64 4.17.6-9.3.1.xcpng8.3 xcp-ng-updates 2.4 M xen-libs x86_64 4.17.6-9.3.1.xcpng8.3 xcp-ng-updates 66 k xen-tools x86_64 4.17.6-9.3.1.xcpng8.3 xcp-ng-updates 47 k Transaction Summary ============================================================================================================================================ Upgrade 5 Packages Total download size: 5.2 M Is this ok [y/d/N]: y Downloading packages: Delta RPMs disabled because /usr/bin/applydeltarpm not installed. (1/5): xen-dom0-tools-4.17.6-9.3.1.xcpng8.3.x86_64.rpm | 2.0 MB 00:00:00 (2/5): xen-dom0-libs-4.17.6-9.3.1.xcpng8.3.x86_64.rpm | 704 kB 00:00:00 (3/5): xen-libs-4.17.6-9.3.1.xcpng8.3.x86_64.rpm | 66 kB 00:00:00 (4/5): xen-hypervisor-4.17.6-9.3.1.xcpng8.3.x86_64.rpm | 2.4 MB 00:00:00 (5/5): xen-tools-4.17.6-9.3.1.xcpng8.3.x86_64.rpm | 47 kB 00:00:00 -------------------------------------------------------------------------------------------------------------------------------------------- Total 2.9 MB/s | 5.2 MB 00:00:01 Running transaction check Running transaction test Transaction test succeeded Running transaction Updating : xen-libs-4.17.6-9.3.1.xcpng8.3.x86_64 1/10 Updating : xen-hypervisor-4.17.6-9.3.1.xcpng8.3.x86_64 2/10 Updating : xen-dom0-libs-4.17.6-9.3.1.xcpng8.3.x86_64 3/10 Updating : xen-tools-4.17.6-9.3.1.xcpng8.3.x86_64 4/10 Updating : xen-dom0-tools-4.17.6-9.3.1.xcpng8.3.x86_64 5/10 Cleanup : xen-dom0-tools-4.17.6-9.3.xcpng8.3.x86_64 6/10 Cleanup : xen-tools-4.17.6-9.3.xcpng8.3.x86_64 7/10 Cleanup : xen-dom0-libs-4.17.6-9.3.xcpng8.3.x86_64 8/10 Cleanup : xen-hypervisor-4.17.6-9.3.xcpng8.3.x86_64 9/10 Cleanup : xen-libs-4.17.6-9.3.xcpng8.3.x86_64 10/10 Verifying : xen-dom0-tools-4.17.6-9.3.1.xcpng8.3.x86_64 1/10 Verifying : xen-dom0-libs-4.17.6-9.3.1.xcpng8.3.x86_64 2/10 Verifying : xen-hypervisor-4.17.6-9.3.1.xcpng8.3.x86_64 3/10 Verifying : xen-libs-4.17.6-9.3.1.xcpng8.3.x86_64 4/10 Verifying : xen-tools-4.17.6-9.3.1.xcpng8.3.x86_64 5/10 Verifying : xen-libs-4.17.6-9.3.xcpng8.3.x86_64 6/10 Verifying : xen-dom0-tools-4.17.6-9.3.xcpng8.3.x86_64 7/10 Verifying : xen-hypervisor-4.17.6-9.3.xcpng8.3.x86_64 8/10 Verifying : xen-tools-4.17.6-9.3.xcpng8.3.x86_64 9/10 Verifying : xen-dom0-libs-4.17.6-9.3.xcpng8.3.x86_64 10/10 Updated: xen-dom0-libs.x86_64 0:4.17.6-9.3.1.xcpng8.3 xen-dom0-tools.x86_64 0:4.17.6-9.3.1.xcpng8.3 xen-hypervisor.x86_64 0:4.17.6-9.3.1.xcpng8.3 xen-libs.x86_64 0:4.17.6-9.3.1.xcpng8.3 xen-tools.x86_64 0:4.17.6-9.3.1.xcpng8.3 -
Working fine latest update into DL360G7
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Installed these patches on a pool of 4 hosts, can confirm everything looking good!
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Just installed these onto my test systems including my twinstor guinea pigs and all seems good so far.
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went well with test systems. going to do prod soon.
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