CBT: the thread to centralize your feedback
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I have been seeing this error recently. "VDI must be free or attached to exactly one VM" with quite a few snapshots attached to the control domain when I look at the health dashboard. I am not sure if this is related to the cbt backups but wanted to ask. It seems to only being happening on my delta backups that do have cbt enabled.
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@olivierlambert Actually I don't think this is the case. The VM's are completely idle doing noting.
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@rtjdamen VM's are idle (there is no doubt here).
Will try these values and see how it goes. -
@manilx it did wonders at our setup, hope they will help you as well
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@rtjdamen THX!
I changed /opt/xensource/sm/cleanup.py as per your settings and rebooted (perhaps bot needed).Looks good. Coalesce finished! Wonder why it did fail, as there was no load on hosts/vm's/nas share....
Will monitor.
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@manilx P.S: Theses mods do not survive a host update, right?
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@manilx nope, but i have talked with a dev about it and they are looking to make it a setting somewhere, don’t know the status of that. Good to see this works for you!
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@manilx I have not tested that, but I would say that's correct. Upgrades are rather destructive for custom changes to system scripts and custom settings. This is to ensure that scripts and settings are set to standard known good values on install or upgrade.
I keep notes on my custom settings/scripts/configs so I can check them after an upgrade or a new install.
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CR failed on all VM's with
Next one was ok.
This happens sometimes, it's not consistent.
{ "data": { "mode": "delta", "reportWhen": "failure" }, "id": "1722153616340", "jobId": "4c084697-6efd-4e35-a4ff-74ae50824c8b", "jobName": "CR", "message": "backup", "scheduleId": "b1cef1e3-e313-409b-ad40-017076f115ce", "start": 1722153616340, "status": "failure", "infos": [ { "data": { "vms": [ "52e64134-62e3-9682-4e3f-296a1198db4d", "43a4d905-7d13-85b8-bed3-f6b805ff26ac", "b5d74e0b-388c-019a-6994-e174c9ca7a51", "d6a5d420-72e6-5c87-a3af-b5eb5c4a44dd", "131ee7f6-4d58-31d9-39a8-53727cc3dc68" ] }, "message": "vms" } ], "tasks": [ { "data": { "type": "VM", "id": "52e64134-62e3-9682-4e3f-296a1198db4d", "name_label": "XO" }, "id": "1722153619552", "message": "backup VM", "start": 1722153619552, "status": "failure", "tasks": [ { "id": "1722153619599", "message": "snapshot", "start": 1722153619599, "status": "success", "end": 1722153622486, "result": "6b6036ae-708e-4cb0-2681-12165ba19919" }, { "data": { "id": "0d9ee24c-ea59-e0e6-8c04-a9a65c22f110", "isFull": false, "name_label": "TBS-h574TX", "type": "SR" }, "id": "1722153622486:0", "message": "export", "start": 1722153622486, "status": "interrupted" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:f35bea93-45b3-f4bd-2752-3853850ff73a" }, "message": "Snapshot data has been deleted" } ], "end": 1722153637891, "result": { "message": "can't create a stream from a metadata VDI, fall back to a base ", "name": "Error", "stack": "Error: can't create a stream from a metadata VDI, fall back to a base \n at Xapi.exportContent (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/xapi/vdi.mjs:202:15)\n at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:57:32\n at async Promise.all (index 0)\n at async cancelableMap (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_cancelableMap.mjs:11:12)\n at async exportIncrementalVm (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:26:3)\n at async IncrementalXapiVmBackupRunner._copy (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/IncrementalXapi.mjs:44:25)\n at async IncrementalXapiVmBackupRunner.run (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/_AbstractXapi.mjs:369:9)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/VmsXapi.mjs:166:38" } }, { "data": { "type": "VM", "id": "43a4d905-7d13-85b8-bed3-f6b805ff26ac", "name_label": "Bitwarden" }, "id": "1722153619556", "message": "backup VM", "start": 1722153619556, "status": "failure", "tasks": [ { "id": "1722153619603", "message": "snapshot", "start": 1722153619603, "status": "success", "end": 1722153624616, "result": "58f1ac5b-7de0-8276-3872-b2a7d5a26ec2" }, { "data": { "id": "0d9ee24c-ea59-e0e6-8c04-a9a65c22f110", "isFull": false, "name_label": "TBS-h574TX", "type": "SR" }, "id": "1722153624616:0", "message": "export", "start": 1722153624616, "status": "interrupted" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:81a61f30-99a0-25bc-35ec-25cadb323a09" }, "message": "Snapshot data has been deleted" } ], "end": 1722153655152, "result": { "message": "can't create a stream from a metadata VDI, fall back to a base ", "name": "Error", "stack": "Error: can't create a stream from a metadata VDI, fall back to a base \n at Xapi.exportContent (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/xapi/vdi.mjs:202:15)\n at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:57:32\n at async Promise.all (index 0)\n at async cancelableMap (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_cancelableMap.mjs:11:12)\n at async exportIncrementalVm (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:26:3)\n at async IncrementalXapiVmBackupRunner._copy (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/IncrementalXapi.mjs:44:25)\n at async IncrementalXapiVmBackupRunner.run (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/_AbstractXapi.mjs:369:9)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/VmsXapi.mjs:166:38" } }, { "data": { "type": "VM", "id": "b5d74e0b-388c-019a-6994-e174c9ca7a51", "name_label": "Docker Server" }, "id": "1722153637896", "message": "backup VM", "start": 1722153637896, "status": "failure", "tasks": [ { "id": "1722153637925", "message": "snapshot", "start": 1722153637925, "status": "success", "end": 1722153639557, "result": "d820e4ad-462f-7043-4f1f-ee21ed986e8d" }, { "data": { "id": "0d9ee24c-ea59-e0e6-8c04-a9a65c22f110", "isFull": false, "name_label": "TBS-h574TX", "type": "SR" }, "id": "1722153639558", "message": "export", "start": 1722153639558, "status": "interrupted" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:5f21b5e1-8423-3bbc-7361-6319bb25e97d" }, "message": "Snapshot data has been deleted" } ], "end": 1722153675901, "result": { "message": "can't create a stream from a metadata VDI, fall back to a base ", "name": "Error", "stack": "Error: can't create a stream from a metadata VDI, fall back to a base \n at Xapi.exportContent (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/xapi/vdi.mjs:202:15)\n at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:57:32\n at async Promise.all (index 0)\n at async cancelableMap (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_cancelableMap.mjs:11:12)\n at async exportIncrementalVm (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:26:3)\n at async IncrementalXapiVmBackupRunner._copy (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/IncrementalXapi.mjs:44:25)\n at async IncrementalXapiVmBackupRunner.run (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/_AbstractXapi.mjs:369:9)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/VmsXapi.mjs:166:38" } }, { "data": { "type": "VM", "id": "d6a5d420-72e6-5c87-a3af-b5eb5c4a44dd", "name_label": "Media Server" }, "id": "1722153655156", "message": "backup VM", "start": 1722153655156, "status": "failure", "tasks": [ { "id": "1722153655188", "message": "snapshot", "start": 1722153655188, "status": "success", "end": 1722153656817, "result": "6c572cec-ed70-d994-a88b-bc6066c06b0b" }, { "data": { "id": "0d9ee24c-ea59-e0e6-8c04-a9a65c22f110", "isFull": false, "name_label": "TBS-h574TX", "type": "SR" }, "id": "1722153656818", "message": "export", "start": 1722153656818, "status": "interrupted" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:c755b6ed-5d00-397c-62a8-db643c3fbdcd" }, "message": "Snapshot data has been deleted" } ], "end": 1722153660309, "result": { "message": "can't create a stream from a metadata VDI, fall back to a base ", "name": "Error", "stack": "Error: can't create a stream from a metadata VDI, fall back to a base \n at Xapi.exportContent (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/xapi/vdi.mjs:202:15)\n at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:57:32\n at async Promise.all (index 0)\n at async cancelableMap (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_cancelableMap.mjs:11:12)\n at async exportIncrementalVm (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:26:3)\n at async IncrementalXapiVmBackupRunner._copy (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/IncrementalXapi.mjs:44:25)\n at async IncrementalXapiVmBackupRunner.run (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/_AbstractXapi.mjs:369:9)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/VmsXapi.mjs:166:38" } }, { "data": { "type": "VM", "id": "131ee7f6-4d58-31d9-39a8-53727cc3dc68", "name_label": "Unifi" }, "id": "1722153660312", "message": "backup VM", "start": 1722153660312, "status": "failure", "tasks": [ { "id": "1722153660341", "message": "snapshot", "start": 1722153660341, "status": "success", "end": 1722153662203, "result": "b0dac528-8914-141b-5d37-8b68bdeb7fe0" }, { "data": { "id": "0d9ee24c-ea59-e0e6-8c04-a9a65c22f110", "isFull": false, "name_label": "TBS-h574TX", "type": "SR" }, "id": "1722153662204", "message": "export", "start": 1722153662204, "status": "interrupted" } ], "infos": [ { "message": "will delete snapshot data" }, { "data": { "vdiRef": "OpaqueRef:595f2f1f-ec64-1d43-b2de-574fcd621576" }, "message": "Snapshot data has been deleted" } ], "end": 1722153669757, "result": { "message": "can't create a stream from a metadata VDI, fall back to a base ", "name": "Error", "stack": "Error: can't create a stream from a metadata VDI, fall back to a base \n at Xapi.exportContent (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/xapi/vdi.mjs:202:15)\n at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:57:32\n at async Promise.all (index 0)\n at async cancelableMap (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_cancelableMap.mjs:11:12)\n at async exportIncrementalVm (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_incrementalVm.mjs:26:3)\n at async IncrementalXapiVmBackupRunner._copy (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/IncrementalXapi.mjs:44:25)\n at async IncrementalXapiVmBackupRunner.run (file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/_vmRunners/_AbstractXapi.mjs:369:9)\n at async file:///opt/xo/xo-builds/xen-orchestra-202407261701/@xen-orchestra/backups/_runners/VmsXapi.mjs:166:38" } } ], "end": 1722153675901 } -
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Yes, a fix is coming in XOA latest tomorrow
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@olivierlambert unfortunately not!
Got error can’t create a stream from a metadata VDI. Fall back to base -
@olivierlambert i updated yesterday to the latest version, during the night our backups did run but still some errors.
I did not see the stream error, however it seems like the same behavior is occuring as we saw with the stream error, but now with error can't create a stream from a metadata VDI
some of these do have a hanging export job in XOA
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@olivierlambert I updated today to confirm cb6cf and also got this error but only once in multiple backups.
Both server runs 8.2.1 version with latest updates.
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We have upgraded from commit f2188 to cb6cf and have 3 hosts. With none of these hosts backups worked anymore after doing the upgrade. When reverting back to f2188 all works again.
We also deleted orphaned VDIs and let the garbage collector do its job but it did not helped.Hosts/Errors :
1.) XCP-ng 8.2.1 : "VDI must be free or attached to exactly one VM"
2.) XCP-ng 8.2.1 (with latest updates): "VDI must be free or attached to exactly one VM"
3.) XenServer 7.1.0 : "MESSAGE_METHOD_UNKOWN(VDI.get_cbt_enabled)With the Xenserver 7.1.0 CBT is not enabled (and can not be enabled).
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@Vinylrider @olivierlambert I found that only backups on the host with the latest updates are having problems eventually with the backup.
These patches with respective versions was not applied to others 2 hosts.
xapi-core 1.249.36
xapi-tests 1.249.36
xapi-xe 1.249.36
xen-dom0-libs 4.13.5
xen-dom0-tools 4.13.5
xen-hypervisor 4.13.5
xen-libs 4.13.5
xen-tools 4.13.5
xsconsole 10.1.13 -
@olivierlambert Running XO source master (commit d0bd6) and Delta backup to S3 is looking for an off-line host in the pool, so the backup fails. This host was evacuated and in maintenance mode and being rebooted by XO. The VM being backed up was running on a different host and the master was not on the off-line host. There are several other running hosts in the pool.
There's no reason XO/XCP should be doing anything with this host...
"error": "HOST_OFFLINE(OpaqueRef:65b7a047-094b-4c7a-a503-2823e92b9fe4)" -
So with the latest XO update released this week i experience a new behavior when trying to run a backup after a VM has moved from Host A to Host B (while staying on the same shared NFS SR)
The new error is "Error: can't create a stream from a metadata VDI, fall back to a base " it then retries and runs a full backup.
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On my CR job I got this error again:
on all VM’s
Next run was ok.
Running commit cb6cf -
@manilx we see this error on some backups as well. ot so often as we saw them prior to this version so it seems like it has been a bit better.
as a fix i tried setting the retry on backups and this resolves it in most of the situations but sometimes i get this error
Also we still have the VDI in use errors now and then, vdi-data-destroy is not done in that situation leaving it a normal snapshot with CBT, not such a big deal as it is only on a very small number of vms, however they showup as orphan vdi's in XOA Health page what makes it a bit weird, i think they should not be visible there.
