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    XCP host rebooted: VM's wont start anymore :-(

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    • P Offline
      prensel @olivierlambert
      last edited by

      @olivierlambert I just did remove the host but when trying to restart the VM it stiil complains about the SR missing. How can I change this setting for this VM ?

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

        Is this SR available?

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        • P Offline
          prensel @olivierlambert
          last edited by

          @olivierlambert [16:41 xcp ~]

          # xe host-list
          uuid ( RO)                : f4d5a20d-e7f3-4e62-8804-e2caa6922a43
                    name-label ( RW): xcp
              name-description ( RW): 
          
          
          [16:41 xcp ~]#
          
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          • P Offline
            prensel @olivierlambert
            last edited by

            @olivierlambert

            [16:44 xcp ~]# xe vm-start uuid=143f7b5b-b252-346c-5cc0-3027a7dba627
            There are no suitable hosts to start this VM on.
            The following table provides per-host reasons for why the VM could not be started:
            
            xcp    : Cannot start here [VM requires access to SR: e1fb6d59-93c5-72bf-a018-184dd3ea3643 (Local storage)]
            
            
            There were no servers available to complete the specified operation.
            [16:44 xcp ~]# xe sr-list
            uuid ( RO)                : e1fb6d59-93c5-72bf-a018-184dd3ea3643
                      name-label ( RW): Local storage
                name-description ( RW): 
                            host ( RO): xcp
                            type ( RO): ext
                    content-type ( RO): user
            
            
            uuid ( RO)                : d58928fe-4a00-3fb0-36c3-8437e3417296
                      name-label ( RW): Local storage
                name-description ( RW): 
                            host ( RO): <not in database>
                            type ( RO): ext
                    content-type ( RO): user
            
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            • P Offline
              prensel @olivierlambert
              last edited by

              @olivierlambert

              [16:47 xcp ~]# xe diagnostic-vm-status uuid=143f7b5b-b252-346c-5cc0-3027a7dba627
              uuid ( RO)              : 143f7b5b-b252-346c-5cc0-3027a7dba627
                      name-label ( RW): testserver
                     power-state ( RO): halted
                  possible-hosts ( RO): 
              
              
              Checking to see whether disks are attachable
              uuid ( RO)            : dd90f85b-755b-9227-aba7-8583e4b8544f
                      vdi-uuid ( RO): <not in database>
                         empty ( RO): true
                        device ( RO): xvdd
                    userdevice ( RW): 3
                          mode ( RW): RO
                          type ( RW): CD
                    attachable ( RO): true
                  storage-lock ( RO): false
              
              
              uuid ( RO)            : 23a51757-9fec-ab0b-a2d4-2790c8a4a63a
                      vdi-uuid ( RO): 06f7760e-157f-4a18-83fe-ba48db06a5ef
                         empty ( RO): false
                        device ( RO): xvda
                    userdevice ( RW): 0
                          mode ( RW): RW
                          type ( RW): Disk
                    attachable ( RO): true
                  storage-lock ( RO): false
              
              
              Checking to see whether VM can boot on each host
              xcp    : Cannot start here [VM requires access to SR: e1fb6d59-93c5-72bf-a018-184dd3ea3643 (Local storage)]
              
              
              VM is not agile because: VM requires access to non-shared SR: e1fb6d59-93c5-72bf-a018-184dd3ea3643 (Local storage). SR must both be marked as shared and a properly configured PBD must be plugged-in on every host
              
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              • olivierlambertO Offline
                olivierlambert Vates 🪐 Co-Founder CEO
                last edited by

                So you want to start a VM that has a disk on a host which you removed.

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                • P Offline
                  prensel @olivierlambert
                  last edited by

                  @olivierlambert
                  I can see the vhd file on the local disk of this host and it has always been there afaik. The other host wasnt used for this VM. And the VM was running fine without the other host being present for several months. So I assume the disk on this host ?

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

                    Well, you can display the VM disk list with a xe vm-disk-list uuid=<VM UUID>.

                    Then you can find info on those disks with, for each, a xe vdi-param-list uuid=<VDI UUID>.

                    Then, you'll see on which SR are each disks, and you'll understand why the VM can't boot.

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                    • P Offline
                      prensel @olivierlambert
                      last edited by

                      @olivierlambert

                      I'm trying to understand how it is possible that this vm has been running for a few months without the other host being present ? Where would have the vhd file been stored ?
                      I have a copy of the vhd file here, can I create a new vm with that ?

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                      • P Offline
                        prensel @olivierlambert
                        last edited by olivierlambert

                        @olivierlambert

                        [17:22 xcp ~]# xe vdi-param-list uuid=06f7760e-157f-4a18-83fe-ba48db06a5ef
                        uuid ( RO)                    : 06f7760e-157f-4a18-83fe-ba48db06a5ef
                                      name-label ( RW): mailserver
                                name-description ( RW): Created by XO
                                   is-a-snapshot ( RO): false
                                     snapshot-of ( RO): <not in database>
                                       snapshots ( RO): 
                                   snapshot-time ( RO): 19700101T00:00:00Z
                              allowed-operations (SRO): generate_config; update; forget; destroy; snapshot; copy; clone
                              current-operations (SRO): 
                                         sr-uuid ( RO): e1fb6d59-93c5-72bf-a018-184dd3ea3643
                                   sr-name-label ( RO): Local storage
                        

                        It says the sr-uuid is e1fb6d59-93c5-72bf-a018-184dd3ea3643, this my local storage SR of the current host ??

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

                          Your mailserver disk is using SR e1fb6d59-93c5-72bf-a018-184dd3ea3643. This SR seems to belong to host ( RO): xcp, not xcp-ng-01.

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                          • P Offline
                            prensel @olivierlambert
                            last edited by

                            @olivierlambert said in XCP host rebooted: VM's wont start anymore 😞:

                            Your mailserver disk is using SR e1fb6d59-93c5-72bf-a018-184dd3ea3643. This SR seems to belong to host ( RO): xcp, not xcp-ng-01.

                            Yes thats right, the host xcp is the current up and the host xcp-ng-01 is the one 'lost'.
                            I really cant see the problem 😞

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

                              Then check your local SR (if it's correctly connected)

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                              • P Offline
                                prensel @olivierlambert
                                last edited by

                                @olivierlambert said in XCP host rebooted: VM's wont start anymore 😞:

                                Then check your local SR (if it's correctly connected)

                                What is the proper way to do that using cli ?

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                                • P Offline
                                  prensel @olivierlambert
                                  last edited by

                                  @olivierlambert said in XCP host rebooted: VM's wont start anymore 😞:

                                  Then check your local SR (if it's correctly connected)

                                  xe sr-scan uuid=e1fb6d59-93c5-72bf-a018-184dd3ea3643 
                                  The SR has no attached PBDs
                                  sr: e1fb6d59-93c5-72bf-a018-184dd3ea3643 (Local storage)
                                  

                                  How can I connect or attach a PBD ?

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

                                    That's your problem, indeed 😄

                                    In XO, it's "connect", otherwise it's xe pbd-connect

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                                    • P Offline
                                      prensel @olivierlambert
                                      last edited by

                                      @olivierlambert

                                      I managed to find the PBD and it doesnt seemed attached

                                      #xe pbd-list
                                      
                                      uuid ( RO)                  : 1a9396ae-e59b-9ea7-1d1a-3c5b139a11cb
                                                   host-uuid ( RO): f4d5a20d-e7f3-4e62-8804-e2caa6922a43
                                                     sr-uuid ( RO): e1fb6d59-93c5-72bf-a018-184dd3ea3643
                                               device-config (MRO): device: /dev/disk/by-id/ata-WDC_WD1003FBYZ-012GB0_WD-WCAW3CYHV0PK
                                          currently-attached ( RO): false
                                      
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                                      • P Offline
                                        prensel @olivierlambert
                                        last edited by

                                        @olivierlambert said in XCP host rebooted: VM's wont start anymore 😞:

                                        That's your problem, indeed 😄

                                        In XO, it's "connect", otherwise it's xe pbd-connect

                                        I think it is 'xe pbd-plug' because 'pbd-connect' doesnt seem to exist ?

                                        But using this command results in this:

                                        [17:56 xcp ~]# xe pbd-plug uuid=1a9396ae-e59b-9ea7-1d1a-3c5b139a11cb
                                        Error code: SR_BACKEND_FAILURE_40
                                        Error parameters: , The SR scan failed  [opterr=uuid=mailserver],
                                        
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                                        • olivierlambertO Offline
                                          olivierlambert Vates 🪐 Co-Founder CEO
                                          last edited by

                                          Yes indeed. Okay at least the error message is very visible.

                                          Why do you have a disk with an UUID mailserver? Have you rename your disk manually??

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                                          • P Offline
                                            prensel @olivierlambert
                                            last edited by

                                            @olivierlambert said in XCP host rebooted: VM's wont start anymore 😞:

                                            Yes indeed. Okay at least the error message is very visible.

                                            Why do you have a disk with an UUID mailserver? Have you rename your disk manually??

                                            To be honest: I really have no clue why it is called like this 😞
                                            Is there a way to fix this error, probably caased by the disk being shut off the hard way caused by the power failure ?

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