XCP-ng
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login

    CBT: the thread to centralize your feedback

    Scheduled Pinned Locked Moved Backup
    402 Posts 33 Posters 362.4k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • R
      rtjdamen @Andrew
      last edited by

      @Andrew we see the same behavior here, no strange backup issues so far!

      1 Reply Last reply Reply Quote 1
      • C
        CJ
        last edited by

        No attached disks so far, but I'll wait until next week to bump up the NBD connections to make sure.

        1 Reply Last reply Reply Quote 1
        • C
          CJ
          last edited by

          Unfortunately, as soon as I bumped the NBD connections up to 2 I got an attached disk. It doesn't seem like the latest changes have fixed the issue.

          Xen Orchestra, commit 74e6f

          D R 2 Replies Last reply Reply Quote 0
          • D
            Delgado @CJ
            last edited by

            This post is deleted!
            1 Reply Last reply Reply Quote 0
            • R
              rtjdamen
              last edited by

              @florent deployed a fix last week that resolved the vdi_in_use errors, however after updating tot the latest XOA release that problem came back and is not resolved anymore. Not shure if this is a new issue or that it is having issues with the fix.

              1 Reply Last reply Reply Quote 0
              • R
                rtjdamen @CJ
                last edited by

                @CJ seems like issue with the nbd connections then… hope this is something that can be fixed easy.

                1 Reply Last reply Reply Quote 0
                • F
                  flakpyro @flakpyro
                  last edited by flakpyro

                  In relation to the issues i have been seeing about "can't create a stream from a metadata VDI, fall back to a base " after preforming a VM migration from one host to another i notice i also see the following in the SMLog.

                  Note: i also see this in the SMLog on the pool master after a VM migration even if i don't have snapshot delete enabled but simply have NBD + CBT Enabled. However the regular delta backup will proceed anyway and works fine in that case. (With snap delete disabled) With Snap delete i will see "can't create a stream from a metadata VDI, fall back to a base". Running the job again after this will produce no error in SMLog. Only after a VM migration between hosts will this appear.

                  Log snippit:

                  Sep 17 21:07:40 xcpng-prd-03 SM: [1126578] lock: opening lock file /var/lock/sm/afd3edac-3659-4253-8d6e-76062399579c/cbtlog
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578] lock: acquired /var/lock/sm/afd3edac-3659-4253-8d6e-76062399579c/cbtlog
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578] ['/usr/sbin/cbt-util', 'get', '-n', '/var/run/sr-mount/16e4ecd2-583e-e2a0-5d3d-8e53ae9c1429/afd3edac-3659-4253-8d6e-76062399579c.cbtlog', '-c']
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   pread SUCCESS
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578] lock: released /var/lock/sm/afd3edac-3659-4253-8d6e-76062399579c/cbtlog
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578] Raising exception [460, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]]
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578] ***** generic exception: vdi_list_changed_blocks: EXCEPTION <class 'xs_errors.SROSError'>, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   File "/opt/xensource/sm/SRCommand.py", line 111, in run
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]     return self._run_locked(sr)
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   File "/opt/xensource/sm/SRCommand.py", line 161, in _run_locked
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]     rv = self._run(sr, target)
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   File "/opt/xensource/sm/SRCommand.py", line 326, in _run
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]     return target.list_changed_blocks()
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   File "/opt/xensource/sm/VDI.py", line 757, in list_changed_blocks
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]     "Source and target VDI are unrelated")
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578] ***** NFS VHD: EXCEPTION <class 'xs_errors.SROSError'>, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   File "/opt/xensource/sm/SRCommand.py", line 385, in run
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]     ret = cmd.run(sr)
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   File "/opt/xensource/sm/SRCommand.py", line 111, in run
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]     return self._run_locked(sr)
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   File "/opt/xensource/sm/SRCommand.py", line 161, in _run_locked
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]     rv = self._run(sr, target)
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   File "/opt/xensource/sm/SRCommand.py", line 326, in _run
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]     return target.list_changed_blocks()
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]   File "/opt/xensource/sm/VDI.py", line 757, in list_changed_blocks
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]     "Source and target VDI are unrelated")
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578]
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578] lock: closed /var/lock/sm/afd3edac-3659-4253-8d6e-76062399579c/cbtlog
Sep 17 21:07:40 xcpng-prd-03 SM: [1126578] lock: closed /var/lock/sm/16e4ecd2-583e-e2a0-5d3d-8e53ae9c1429/sr
Sep 17 21:07:40 xcpng-prd-03 SM: [1126556] FileVDI._snapshot for c56e5d87-1486-41da-86d4-92ede62de75a (type 2)
Sep 17 21:07:40 xcpng-prd-03 SM: [1126556] ['uuidgen', '-r']
Sep 17 21:07:40 xcpng-prd-03 SM: [1126556]   pread SUCCESS
                  1 Reply Last reply Reply Quote 0
                  • olivierlambertO
                    olivierlambert Vates 🪐 Co-Founder CEO
                    last edited by

                    I wonder if the migration is not also migrating the VDI with it, which shouldn't be the case. What are you doing exactly to migrate the VM?

                    F 1 Reply Last reply Reply Quote 0
                    • F
                      flakpyro @olivierlambert
                      last edited by

                      @olivierlambert Im leaving the VM itself on the shared NFS SR. The above error was triggered by putting a host in maintenance mode via XOA to install the RC2 update via ISO yesterday. Other times its just by checking off a number of VMs in XOA and clicking the migrate button, selecting another host within the same pool and clicking Ok. Everything should be staying on the same shared SR.

                      Its like the hosts can't read each others metadata for some reason?

                      1 Reply Last reply Reply Quote 0
                      • olivierlambertO
                        olivierlambert Vates 🪐 Co-Founder CEO
                        last edited by

                        Can you show me the exact UI steps you do in XO to do the migration? Then, in the task, are you seeing anything outside VM migrate?

                        1 Reply Last reply Reply Quote 0
                        • D
                          Delgado
                          last edited by Delgado

                          I saw these errors in my log today after starting a replication job on commit 530c3. I have not migrated these VMs to a new host or an SR.

                          Sep 18 08:17:12  xo-server[6199]: 2024-09-18T12:17:12.861Z xo:xapi:vdi INFO can't get changed block {
Sep 18 08:17:12  xo-server[6199]:   error: XapiError: SR_BACKEND_FAILURE_460(, Failed to calculate changed blocks for given VDIs.  [opterr=Source and target VDI are unrelated], )
Sep 18 08:17:12  xo-server[6199]:       at XapiError.wrap (file:///opt/xo/xo-builds/xen-orchestra-202409180806/packages/xen-api/_XapiError.mjs:16:12)
Sep 18 08:17:12  xo-server[6199]:       at file:///opt/xo/xo-builds/xen-orchestra-202409180806/packages/xen-api/transports/json-rpc.mjs:38:21
Sep 18 08:17:12  xo-server[6199]:       at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
Sep 18 08:17:12  xo-server[6199]:     code: 'SR_BACKEND_FAILURE_460',
Sep 18 08:17:12  xo-server[6199]:     params: [
Sep 18 08:17:12  xo-server[6199]:       '',
Sep 18 08:17:12  xo-server[6199]:       'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated], )
Sep 18 08:17:12  xo-server[6199]:       ''
Sep 18 08:17:12  xo-server[6199]:     ],
Sep 18 08:17:12  xo-server[6199]:     call: { method: 'VDI.list_changed_blocks', params: [Array] },
Sep 18 08:17:12  xo-server[6199]:     url: undefined,
Sep 18 08:17:12  xo-server[6199]:     task: undefined
Sep 18 08:17:12  xo-server[6199]:   },
Sep 18 08:17:12  xo-server[6199]:   ref: 'OpaqueRef:a7c534ef-d1d5-0578-a564-05b2c36de7be',
Sep 18 08:17:12  xo-server[6199]:   baseRef: 'OpaqueRef:5d4109f0-5278-64d8-233d-6cd73c8c6d6a'
Sep 18 08:17:12  xo-server[6199]: }
Sep 18 08:17:14  xo-server[6199]: 2024-09-18T12:17:14.459Z xo:xapi:vdi INFO can't get changed block {
Sep 18 08:17:14  xo-server[6199]:   error: XapiError: SR_BACKEND_FAILURE_460(, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated], )
Sep 18 08:17:14  xo-server[6199]:       at XapiError.wrap (file:///opt/xo/xo-builds/xen-orchestra-202409180806/packages/xen-api/_XapiError.mjs:16:12)
Sep 18 08:17:14  xo-server[6199]:       at file:///opt/xo/xo-builds/xen-orchestra-202409180806/packages/xen-api/transports/json-rpc.mjs:38:21
Sep 18 08:17:14  xo-server[6199]:       at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
Sep 18 08:17:14  xo-server[6199]:     code: 'SR_BACKEND_FAILURE_460',
Sep 18 08:17:14  xo-server[6199]:     params: [
Sep 18 08:17:14  xo-server[6199]:       '',
Sep 18 08:17:14  xo-server[6199]:       'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]',
Sep 18 08:17:14  xo-server[6199]:       ''
Sep 18 08:17:14  xo-server[6199]:     ],
Sep 18 08:17:14  xo-server[6199]:     call: { method: 'VDI.list_changed_blocks', params: [Array] },
Sep 18 08:17:14  xo-server[6199]:     url: undefined,
Sep 18 08:17:14  xo-server[6199]:     task: undefined
Sep 18 08:17:14  xo-server[6199]:   },
                          1 Reply Last reply Reply Quote 0
                          • C
                            CJ
                            last edited by

                            After changing NBD back to 1, I haven't seen any additional attached disks. However, the backup that originally succeeded with an attached disk has now failed. Odd that it will initially work with an attached disk but then fail with an attached disk.

                            1 Reply Last reply Reply Quote 0
                            • Tristis OrisT
                              Tristis Oris Top contributor
                              last edited by

                              i still have one VMs stuck without backup. Already restart it host and halt VM itself. SMlog have no records during 5minutes of that task.

                                    "result": {
        "code": "VDI_IN_USE",
        "params": [
          "OpaqueRef:1f96d4e7-5ca6-4070-b686-b34dd83e5442",
          "destroy"
        ],
        "task": {
          "uuid": "81a60e3a-c887-13f3-fedc-36eae232a6df",
          "name_label": "Async.VDI.destroy",
          "name_description": "",
          "allowed_operations": [],
          "current_operations": {},
          "created": "20240918T18:03:28Z",
          "finished": "20240918T18:03:28Z",
          "status": "failure",
          "resident_on": "OpaqueRef:223881b6-1309-40e6-9e42-5ad74a274d2d",
          "progress": 1,
          "type": "<none/>",
          "result": "",
          "error_info": [
            "VDI_IN_USE",
            "OpaqueRef:1f96d4e7-5ca6-4070-b686-b34dd83e5442",
            "destroy"
          ],
          "other_config": {},
          "subtask_of": "OpaqueRef:NULL",
          "subtasks": [],
          "backtrace": "(((process xapi)(filename ocaml/xapi/message_forwarding.ml)(line 4711))((process xapi)(filename lib/xapi-stdext-pervasives/pervasiveext.ml)(line 24))((process xapi)(filename ocaml/xapi/rbac.ml)(line 205))((process xapi)(filename ocaml/xapi/server_helpers.ml)(line 95)))"
        },
        "message": "VDI_IN_USE(OpaqueRef:1f96d4e7-5ca6-4070-b686-b34dd83e5442, destroy)",
        "name": "XapiError",
        "stack": "XapiError: VDI_IN_USE(OpaqueRef:1f96d4e7-5ca6-4070-b686-b34dd83e5442, destroy)\n    at XapiError.wrap (file:///opt/xo/xo-builds/xen-orchestra-202409111040/packages/xen-api/_XapiError.mjs:16:12)\n    at default (file:///opt/xo/xo-builds/xen-orchestra-202409111040/packages/xen-api/_getTaskResult.mjs:13:29)\n    at Xapi._addRecordToCache (file:///opt/xo/xo-builds/xen-orchestra-202409111040/packages/xen-api/index.mjs:1041:24)\n    at file:///opt/xo/xo-builds/xen-orchestra-202409111040/packages/xen-api/index.mjs:1075:14\n    at Array.forEach (<anonymous>)\n    at Xapi._processEvents (file:///opt/xo/xo-builds/xen-orchestra-202409111040/packages/xen-api/index.mjs:1065:12)\n    at Xapi._watchEvents (file:///opt/xo/xo-builds/xen-orchestra-202409111040/packages/xen-api/index.mjs:1238:14)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)"
      }
    },

                              and often get Job canceled to protect the VDI chain errors for others. That continue since bad CBT commit.

                              1 Reply Last reply Reply Quote 0
                              • D
                                Delgado
                                last edited by Delgado

                                It looks like all of my backups have started erroring with "can't create a stream from a metadata VDI, fall back to a base" I am using 1 NDB connection and I am not commit 530c3. I have attached the logs of a delta backup and a replication.

                                2024-09-19T16_00_00.002Z - backup NG.json.txt
                                2024-09-19T04_00_00.001Z - backup NG.json.txt

                                I am seeing this in the journal logs.

                                Sep 19 12:01:39 hostname xo-server[11597]:   error: XapiError: SR_BACKEND_FAILURE_460(, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated], )
Sep 19 12:01:39 hostname xo-server[11597]:       at XapiError.wrap (file:///opt/xo/xo-builds/xen-orchestra-202409180806/packages/xen-api/_XapiError.mjs:16:12)
Sep 19 12:01:39 hostname xo-server[11597]:       at file:///opt/xo/xo-builds/xen-orchestra-202409180806/packages/xen-api/transports/json-rpc.mjs:38:21
Sep 19 12:01:39 hostname xo-server[11597]:       at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
Sep 19 12:01:39 hostname xo-server[11597]:     code: 'SR_BACKEND_FAILURE_460',
Sep 19 12:01:39 hostname xo-server[11597]:     params: [
Sep 19 12:01:39 hostname xo-server[11597]:       '',
Sep 19 12:01:39 hostname xo-server[11597]:       'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]',
Sep 19 12:01:39 hostname xo-server[11597]:       ''
Sep 19 12:01:39 hostname xo-server[11597]:     ],
Sep 19 12:01:39 hostname xo-server[11597]:     call: { method: 'VDI.list_changed_blocks', params: [Array] },
Sep 19 12:01:39 hostname xo-server[11597]:     url: undefined,
Sep 19 12:01:39 hostname xo-server[11597]:     task: undefined
Sep 19 12:01:39 hostname xo-server[11597]:   },
Sep 19 12:01:39 hostname xo-server[11597]:   ref: 'OpaqueRef:0438087b-5cbc-a458-a8a0-4eaa6ce74d19',
Sep 19 12:01:39 hostname xo-server[11597]:   baseRef: 'OpaqueRef:ae1330a2-0f95-6c16-6878-f6c05373a2f2'
Sep 19 12:01:39 hostname xo-server[11597]: }
Sep 19 12:01:43 hostname xo-server[11597]: 2024-09-19T16:01:43.015Z xo:xapi:vdi INFO  OpaqueRef:b6f65ae4-bee8-b179-a06c-2bb4956214ba has been disconnected from dom0 {
Sep 19 12:01:43 hostname xo-server[11597]:   vdiRef: 'OpaqueRef:0438087b-5cbc-a458-a8a0-4eaa6ce74d19',
Sep 19 12:01:43 hostname xo-server[11597]:   vbdRef: 'OpaqueRef:b6f65ae4-bee8-b179-a06c-2bb4956214ba'
Sep 19 12:01:43 hostname xo-server[11597]: }
Sep 19 12:02:29 hostname xo-server[11597]: 2024-09-19T16:02:29.855Z xo:xapi:vdi INFO can't get changed block {
Sep 19 12:02:29 hostname xo-server[11597]:   error: XapiError: SR_BACKEND_FAILURE_460(, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated], )
Sep 19 12:02:29 hostname xo-server[11597]:       at XapiError.wrap (file:///opt/xo/xo-builds/xen-orchestra-202409180806/packages/xen-api/_XapiError.mjs:16:12)
Sep 19 12:02:29 hostname xo-server[11597]:       at file:///opt/xo/xo-builds/xen-orchestra-202409180806/packages/xen-api/transports/json-rpc.mjs:38:21
Sep 19 12:02:29 hostname xo-server[11597]:       at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
Sep 19 12:02:29 hostname xo-server[11597]:     code: 'SR_BACKEND_FAILURE_460',
Sep 19 12:02:29 hostname xo-server[11597]:     params: [
Sep 19 12:02:29 hostname xo-server[11597]:       '',
Sep 19 12:02:29 hostname xo-server[11597]:       'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated]',
                                R 1 Reply Last reply Reply Quote 0
                                • R
                                  rtjdamen @Delgado
                                  last edited by

                                  @Delgado this error sound like issues with the cbt that got invalid, could it be u had a host crash or storage issue? Does a retry create a working full?

                                  D 1 Reply Last reply Reply Quote 0
                                  • D
                                    Delgado @rtjdamen
                                    last edited by

                                    @rtjdamen I haven't had any hosts crash recently or any storage issue from what I can tell. The "type" in the log says delta but the size of the backups definitely look like full backups. They're also labelled as key when I look at the restore points for delta backups.

                                    R 1 Reply Last reply Reply Quote 0
                                    • R
                                      rtjdamen @Delgado
                                      last edited by

                                      @Delgado i believe this error message is incorrect, it should be something like "CBT invalid fall back to base", i have seen it random once in a while on a vm, and also with issues on a host or specific storage pool.

                                      1 Reply Last reply Reply Quote 0
                                      • Tristis OrisT
                                        Tristis Oris Top contributor
                                        last edited by

                                        not sure is it CBT related, never seen that before. VM backup failed in 1min , as always, but task still looks like active.

                                        5268e5c6-2136-434d-9417-37abc9b4be6e-image.png
                                        2318239b-370b-4e1a-8b2d-413204b2eac5-image.png

                                        1 Reply Last reply Reply Quote 0
                                        • C
                                          CJ
                                          last edited by

                                          @olivierlambert Any progress on the attached disks and multiple NBD connections issue?

                                          Related, should we see any performance difference related to the number of NBD connections? I went from 4 to 1 and my backups are still taking the same amount of time.

                                          1 Reply Last reply Reply Quote 0
                                          • olivierlambertO
                                            olivierlambert Vates 🪐 Co-Founder CEO
                                            last edited by

                                            I'm not the right person to ask, I'm not tracking this in details. In our own prod, with use more concurrency with 1x NBD connection and that's the best combo I found so far.

                                            C 1 Reply Last reply Reply Quote 0
                                            • First post
                                              Last post