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    Testing ZFS with XCP-ng

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    • borzelB Offline
      borzel XCP-ng Center Team
      last edited by borzel

      I tested latest and greatest XO (5.24.1 from sources) with latest XCP-ng 7.5 (incl. xcp-ng-extra repo/ZFS). Backups do not work 😞

      If the VDI is on a ext-SR, all is fine, backup working.
      If the VDI is on a File-SR (ZFS based), the backup says "VDI_ERROR" or "VDI Chain to long". I will provide logfiles tomorrow if needed.

      Setup of my File-SR:
      xe sr-create host-uuid=<xxx> name-label=zfssr type=file other-config:o_direct=false device-config:location=/zfspool/zfssr

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      • olivierlambertO Offline
        olivierlambert Vates 🪐 Co-Founder CEO
        last edited by

        VDI chain too long doesn't seems related. It means you have a VDI chain that's around 30 files.

        Can you provide the exact/detailed error log?

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        • borzelB Offline
          borzel XCP-ng Center Team
          last edited by borzel

          0_1534286419566_560b7fad-965d-42bc-8f40-2eed276163b8-grafik.png

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          • borzelB Offline
            borzel XCP-ng Center Team
            last edited by borzel

            I searched in xensource.log, SMlog and syslog, no related entries found 😞

            How can I increase the loglevel of XO?

            Here's the log output if I start this job again:

            Aug 15 01:10:35 ubuntu xo-server[616]: 2018-08-14T23:10:35.241Z xo:xapi Snapshotting VM pmg as [XO Backup test] pmg
Aug 15 01:10:36 ubuntu xo-server[616]: 2018-08-14T23:10:36.948Z xo:xapi exporting VDI pmg 0
Aug 15 01:10:41 ubuntu xo-server[616]: 2018-08-14T23:10:41.289Z xo:xapi Deleting VM [XO Backup test] pmg
Aug 15 01:10:41 ubuntu xo-server[616]: 2018-08-14T23:10:41.585Z xo:xapi Deleting VDI pmg 0

            It's nearly nothing...

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            • nraynaudN Offline
              nraynaud XCP-ng Team
              last edited by

              @borzel > The error is often in the Settings->Logs panel in XO in this case

              borzelB 1 Reply Last reply Reply Quote 0
              • borzelB Offline
                borzel XCP-ng Center Team @nraynaud
                last edited by

                @nraynaud no, it's as empty as it could be 😞

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                • borzelB Offline
                  borzel XCP-ng Center Team
                  last edited by

                  I found something in /var/log/xensource.log (used tail -f /var/log/xensource.log | grep -i 'error')

                  Aug 14 23:19:10 hw xapi: [error|hw|63005 INET :::80|[XO] VDI Export R:3001f7e5aa17|vhd_tool_wrapper] vhd-tool failed, returning VDI_IO_ERROR
Aug 14 23:19:10 hw xapi: [error|hw|63005 INET :::80|[XO] VDI Export R:3001f7e5aa17|vhd_tool_wrapper] vhd-tool output: vhd-tool: internal error, uncaught exception:#012          Unix.Unix_error(Unix.EINVAL, "open", "/var/run/sr-mount/9fc67ea3-c9b3-5e62-ecc3-7d1debf81744/6781ab7b-c475-4d72-a7d0-b2aeca2e81e3.vhd")#012          Raised at file "src/core/lwt.ml", line 3008, characters 20-29#012          Called from file "src/unix/lwt_main.ml", line 42, characters 8-18#012          Called from file "src/impl.ml", line 811, characters 4-23#012          Called from file "src/cmdliner_term.ml", line 27, characters 19-24#012          Called from file "src/cmdliner.ml", line 27, characters 27-34#012          Called from file "src/cmdliner.ml", line 106, characters 32-39
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] [XO] VDI Export R:3001f7e5aa17 failed with exception Server_error(VDI_IO_ERROR, [ Device I/O errors ])
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] Raised Server_error(VDI_IO_ERROR, [ Device I/O errors ])
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 1/13 xapi @ hw Raised at file ocaml/xapi/vhd_tool_wrapper.ml, line 59
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 2/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 22
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 3/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 26
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 4/13 xapi @ hw Called from file ocaml/xapi/export_raw_vdi.ml, line 47
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 5/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 22
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 6/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 26
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 7/13 xapi @ hw Called from file ocaml/xapi/export_raw_vdi.ml, line 54
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 8/13 xapi @ hw Called from file ocaml/xapi/export_raw_vdi.ml, line 65
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 9/13 xapi @ hw Called from file ocaml/xapi/server_helpers.ml, line 73
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 10/13 xapi @ hw Called from file ocaml/xapi/server_helpers.ml, line 91
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 11/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 22
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 12/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 26
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace] 13/13 xapi @ hw Called from file lib/backtrace.ml, line 177
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:315adbf2ec6c|backtrace]
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] VDI.export_raw_vdi D:315adbf2ec6c failed with exception Server_error(VDI_IO_ERROR, [ Device I/O errors ])
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] Raised Server_error(VDI_IO_ERROR, [ Device I/O errors ])
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 1/13 xapi @ hw Raised at file lib/debug.ml, line 187
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 2/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 22
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 3/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 26
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 4/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 22
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 5/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 26
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 6/13 xapi @ hw Called from file ocaml/xapi/xapi_http.ml, line 185
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 7/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 22
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 8/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 26
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 9/13 xapi @ hw Called from file ocaml/xapi/server_helpers.ml, line 73
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 10/13 xapi @ hw Called from file ocaml/xapi/server_helpers.ml, line 91
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 11/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 22
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 12/13 xapi @ hw Called from file lib/xapi-stdext-pervasives/pervasiveext.ml, line 26
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace] 13/13 xapi @ hw Called from file lib/backtrace.ml, line 177
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80|VDI.export_raw_vdi D:fc8d0f58f1be|backtrace]
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80||backtrace] VDI.export_raw_vdi D:fc8d0f58f1be failed with exception Server_error(VDI_IO_ERROR, [ Device I/O errors ])
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80||backtrace] Raised Server_error(VDI_IO_ERROR, [ Device I/O errors ])
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80||backtrace] 1/1 xapi @ hw Raised at file (Thread 63005 has no backtrace table. Was with_backtraces called?, line 0
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80||backtrace]
Aug 14 23:19:11 hw xapi: [error|hw|63005 INET :::80||xapi] Unhandled Api_errors.Server_error(VDI_IO_ERROR, [ Device I/O errors ])
                  nraynaudN 1 Reply Last reply Reply Quote 0
                  • olivierlambertO Offline
                    olivierlambert Vates 🪐 Co-Founder CEO
                    last edited by

                    I'll try to run some tests on my side.

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                    • stormiS Offline
                      stormi Vates 🪐 XCP-ng Team @borzel
                      last edited by

                      @borzel I'm not very familiar with github wikis, but I think you can do pull requests against the wiki.

                      borzelB 1 Reply Last reply Reply Quote 0
                      • borzelB Offline
                        borzel XCP-ng Center Team @stormi
                        last edited by

                        @stormi wiki issue is allready solved 😉

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                        • nraynaudN Offline
                          nraynaud XCP-ng Team @borzel
                          last edited by

                          @borzel good catch, it's another O_DIRECT issue.

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                          • nraynaudN Offline
                            nraynaud XCP-ng Team
                            last edited by

                            @borzel I am struggling to match the error lines in your log with a source code, can you tell me what version of vhd-tool you have installed please ? (yum info vhd-tool)

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                            • borzelB Offline
                              borzel XCP-ng Center Team @nraynaud
                              last edited by borzel

                              @nraynaud

                              # yum info vhd-tool
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Installed Packages
Name        : vhd-tool
Arch        : x86_64
Version     : 0.20.0
Release     : 4.2.xcp.el7.centos.extras
Size        : 40 M
Repo        : installed
From repo   : xcp-ng-extras
Summary     : Command-line tools for manipulating and
            : streaming .vhd format files
URL         : https://github.com/xapi-project/vhd-tool
License     : LGPL+linking exception
Description : Simple command-line tools for manipulating an
            : streaming .vhd format file.
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                              • nraynaudN Offline
                                nraynaud XCP-ng Team
                                last edited by

                                Thanks,
                                I have found a suspected O_DIRECT here, the solution won't come quickly.

                                borzelB 1 Reply Last reply Reply Quote 0
                                • S Offline
                                  SeyedGH
                                  last edited by

                                  Does this issue also have a role if you run glusterfs on top of zfs?
                                  Or is it just directly on zfs.

                                  Because i would want to runs glusterfs on top of zfs on a spearate server, and use glusterfs driver to connect to it.

                                  Do i also have this issue then?

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                                  • borzelB Offline
                                    borzel XCP-ng Center Team @nraynaud
                                    last edited by

                                    @nraynaud I just tested with an up-to-date XCP-ng 7.5 host, same failure

                                    # yum info vhd-tool
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Installed Packages
Name        : vhd-tool
Arch        : x86_64
Version     : 0.20.0
Release     : 4.3.xcp.el7.centos
Size        : 40 M
Repo        : installed
From repo   : xcp-ng-updates
Summary     : Command-line tools for manipulating and streaming .vhd format files
URL         : https://github.com/xapi-project/vhd-tool
License     : LGPL+linking exception
Description : Simple command-line tools for manipulating and streaming .vhd format file.
                                    1 Reply Last reply Reply Quote 0
                                    • nraynaudN Offline
                                      nraynaud XCP-ng Team
                                      last edited by

                                      I am till on the issue, the subject is way deeper than expected.

                                      borzelB 1 Reply Last reply Reply Quote 0
                                      • borzelB Offline
                                        borzel XCP-ng Center Team @nraynaud
                                        last edited by

                                        @nraynaud take your time, no rush

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                                        • borzelB Offline
                                          borzel XCP-ng Center Team
                                          last edited by

                                          Just added the setup part to https://github.com/xcp-ng/xcp/wiki/ZFS-on-XCP-ng-7.5-and-later#setup

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                                          • stormiS Offline
                                            stormi Vates 🪐 XCP-ng Team
                                            last edited by

                                            Thanks @borzel

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