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=20

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I am having an issue where when I use the REST API to connect a snapshot= from another VM to a Backup-Appliance-VM, after the clone when I remove the D= isk and delete the Snapshot, the disk remains in the Backup-Appliance-VM as /dev/sdb ot /dev/vdb. =20 If I reboot the Bakup-Applicance-VM the disk disappears. =20 If I manually remove the disk by "echo 1 > /sys/block/sdb/device/delete=B2=

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disk will disappear, but if I rescan the scsi bus, it is found and shows= up again in the VM OS, but the oVirt WebGUI does NOT show it as connected. =20 -- The first part is expected - the 2nd isn't. =20 What are you referring to as the first and second part?

=20 =20

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=20 I am also not able to attach any other disks as it complains of : =20 HotPlugDiskVDS failed: internal error: unable to execute QEMU command '__com.redhat_drive_add': Duplicate ID 'drive-scsi0-0-0-2' for drive =20 I did see that others in the past have gotten around this issue by reboo= ting the Backup-Appliance-VM and then continuing on with the next VM backup a= nd looping through backup-reboot-backup-reboot-etc. =20 Anyone have an idea on how to solve this issue and remove the hooks from=

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guest OS? =20 Steps to reproduce this issue: =20 1. Create a backup appliance VM to be used for the backup script executi= on 2. Currently I have the Vms set to virtio with threaded I/O enabled. Als= o tried virtio_scsi with same result. 3. Using REST API =AD make snapshot of target VM 4. Using REST API =AD fetch vm metadata 5. Using REST API =AD attach the snapshot/disk to the Backup-Appliance-VM 6. dd the drive to backup folder 7. Using REST API =AD remove the disk from the Backup-Appliance-VM 8. Using REST API =AD delete the snapshot 9. ** Check the guest OS of the Backup-Appliance-VM and the mounted driv= e from the backup above still appears and behaves as mentioned in comments above. =20 =20 =8B There are many details missing, including versions of everything used, = but logs would be most helpful here. =20 Versions for oVirt are all the most recent. This is a fresh install of th= e Hosted Engine. I will just script the backup to cycle through sdb, sdc, s=

=8B I understand why the disk is seen after it was detached (stale device), not why it comes back after rescan, which seems to suggest it is not detached properly.=20 If I pass an API call to reboot, the VM reboots and the stale disks are still connected, however if I pass an API call to shutdown, the stale disks are removed. Is there something else that can be passed to the reboot API call to have it disconnect whatever the shutdown does? If not, is there a way to defer an API call as my backup VM is what is calling the API, it can= t call to start itself if it is off due to a shutdown call? I dont see any errors in the logs while tailing with: tail /var/log/ovirt-*/* -f the dd,

=8A. Szzzz, just seems odd that once a disk is detached and a snapshot dele= ted, that the Backup_appliance-VM can still access the drive/snapshot?

=8B Unrelated note - do NOT use /dev/sdX to enumerate them. Especially on SCS= I bus, probing is done in parallel and they may have a different name next time. Use /dev/disk/by-id paths. Each time the backup is done, it only uses the device /dev/xxY to mount the disk image. The actual backup is being catalogued using the uuid and vmname= .

=20 =20

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A second issue is that the above wont work when I have the Vms running o= n MPIO iSCSI storage, so for testing I have moved to NFS4. Anyone have ide= as about either issue, I=B9d love to hear ;) =20 =8B Same - logs would be helpful here. =20 I will continue to dig through this issue and will post logs if stuck. I = just wanted to know if there was anything obvious that I should be doing differently with iSCSI vs NFS with mounting disks/snapshots.

=8B Nope.=20 =8B Y. Zip =20

=20 Zip =20 =8B Y. =20

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=20 Thanks =20 Irc.oftc.net <http://Irc.oftc.net> #ovirt zipur =20 =20 =20 _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users =20 =20

<div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-siz= e: 14px;">I dont see any errors in the logs while tailing with:</div><div><f= ont face=3D"Calibri,sans-serif">tail /var/log/ovirt-*/* -f</font></div><div><b= r></div><span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); font-fam= ily: Calibri, sans-serif; font-size: 14px;"><div><div><div dir=3D"auto"><div d= ir=3D"auto"><br></div><div dir=3D"auto"><div class=3D"gmail_extra"><div class=3D"gma= il_quote"><blockquote class=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px= #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0= ,0);font-size:14px;font-family:Calibri,sans-serif"><div class=3D"quoted-text">= <div><br></div><span id=3D"m_-5510294568030381310OLK_SRC_BODY_SECTION"><div><d= iv><div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div>&nb= sp;</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-lef= t:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;color:rg= b(0,0,0);font-size:14px;font-family:Calibri,sans-serif"><div><br></div><div>= I am also not able to attach any other disks as it complains of :</div><div>= <br></div><div><span class=3D"m_-5510294568030381310m_-3670774818294595794Appl= e-tab-span" style=3D"white-space:pre-wrap"></span>HotPlugDiskVDS failed: inter= nal error: unable to execute QEMU command '__com.redhat_drive_add': Duplicat= e ID 'drive-scsi0-0-0-2' for drive</div><div><br></div><div>I did see that o=

<br></div><div>— There are many details missing, including versions o= f everything used, but logs would be most helpful here.</div><div> </di= v></div></div></div></div></div></span></div><div>Versions for oVirt are all=

</div><div><br></div><span id=3D"m_-5510294568030381310OLK_SRC_BODY_SECTION">= <div><div><div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><=

--B_3599464360_122445562 Content-type: text/html; charset="ISO-8859-1" Content-transfer-encoding: quoted-printable <html><head></head><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: s= pace; -webkit-line-break: after-white-space;"><div style=3D"color: rgb(0, 0, 0= ); font-family: Calibri, sans-serif; font-size: 14px;"><div><div><br></div><= /div></div><span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); font-= family: Calibri, sans-serif; font-size: 14px;"><div><div><div dir=3D"auto"><di= v><div class=3D"gmail_extra"><div class=3D"gmail_quote"><blockquote class=3D"quote= " style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div= style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-family:Cal= ibri,sans-serif"><div><div><div><br></div></div></div><span id=3D"m_-551029456= 8030381310OLK_SRC_BODY_SECTION"><div><div><div dir=3D"ltr"><div class=3D"gmail_e= xtra"><div class=3D"gmail_quote"><div class=3D"quoted-text"><blockquote class=3D"g= mail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left= :1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-= family:Calibri,sans-serif"><div>I am having an issue where when I use the RE= ST API to connect a snapshot from another VM to a Backup-Appliance-VM, after= the clone when I remove the Disk and delete the Snapshot, the disk remains = in the Backup-Appliance-VM as /dev/sdb ot /dev/vdb. </div><div><br></di= v><div>If I reboot the Bakup-Applicance-VM the disk disappears.</div><div><b= r></div><div>If I manually remove the disk by "echo 1 > /sys/block/sdb/de= vice/delete” the disk will disappear, but if I rescan the scsi bus, it= is found and shows up again in the VM OS, but the oVirt WebGUI does NOT sho= w it as connected.</div></div></blockquote><div><br></div></div><div>-- The = first part is expected - the 2nd isn't.</div></div></div></div></div></div><= /span><div><br></div><div>What are you referring to as the first and second = part? </div></div></blockquote></div></div></div><div dir=3D"auto"><br></= div><div dir=3D"auto">— I understand why the disk is seen after it was d= etached (stale device), not why it comes back after rescan, which seems to s= uggest it is not detached properly. </div></div></div></div></span><div= style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font-size: 14= px;"><br></div><div style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-s= erif; font-size: 14px;"><br></div><div style=3D"color: rgb(0, 0, 0); font-fami= ly: Calibri, sans-serif; font-size: 14px;">If I pass an API call to <b>reboo= t</b>, the VM reboots and the stale disks are still connected, however if I = pass an API call to <b>shutdown</b>, the stale disks are removed. Is there s= omething else that can be passed to the <b>reboot</b> API call to have it di= sconnect whatever the <b>shutdown</b> does? If not, is there a way to defer = an API call as my backup VM is what is calling the API, it cant call to star= t itself if it is off due to a <b>shutdown</b> call?</div><div style=3D"color:= rgb(0, 0, 0); font-family: Calibri, sans-serif; font-size: 14px;"><br></div= thers in the past have gotten around this issue by rebooting the Backup-Appl= iance-VM and then continuing on with the next VM backup and looping through = backup-reboot-backup-reboot-et<wbr>c. </div><div><br></div><div>Anyone = have an idea on how to solve this issue and remove the hooks from the guest = OS?</div><div><br></div><div>Steps to reproduce this issue:</div><div><br></= div><ol><li>Create a backup appliance VM to be used for the backup script ex= ecution</li><li>Currently I have the Vms set to virtio with threaded I/O ena= bled. Also tried virtio_scsi with same result.</li><li>Using REST API –= ; make snapshot of target VM</li><li>Using REST API – fetch vm metadat= a</li><li>Using REST API – attach the snapshot/disk to the Backup-Appl= iance-VM</li><li>dd the drive to backup folder</li><li>Using REST API –= ; remove the disk from the Backup-Appliance-VM</li><li>Using REST API –= ; delete the snapshot</li><li>** Check the guest OS of the Backup-Appliance-= VM and the mounted drive from the backup above still appears and behaves as = mentioned in comments above.</li></ol><div><br></div></div></blockquote><div= the most recent. This is a fresh install of the Hosted Engine. I will just = script the backup to cycle through sdb, sdc, sdd, …. Szzzz, just seems= odd that once a disk is detached and a snapshot deleted, that the Backup_ap= pliance-VM can still access the drive/snapshot? </div></div></blockquote></div><= /div></div><div dir=3D"auto"><br></div><div dir=3D"auto">— Unrelated note = - do NOT use /dev/sdX to enumerate them. Especially on SCSI bus, probing is = done in parallel and they may have a different name next time. Use /dev/disk= /by-id paths. </div></div></div></div></span><div><br></div><div>Each t= ime the backup is done, it only uses the device /dev/xxY to mount the disk i= mage. The actual backup is being catalogued using the uuid and vmname.</div>= <span id=3D"OLK_SRC_BODY_SECTION" style=3D"color: rgb(0, 0, 0); font-family: Cal= ibri, sans-serif; font-size: 14px;"><div><div><div dir=3D"auto"><div dir=3D"auto= "><br></div><div dir=3D"auto"><div class=3D"gmail_extra"><div class=3D"gmail_quote= "><blockquote class=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc so= lid;padding-left:1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0,0);font= -size:14px;font-family:Calibri,sans-serif"><div class=3D"quoted-text"><div><br= blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc= solid;padding-left:1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0,0);f= ont-size:14px;font-family:Calibri,sans-serif"><div></div><div>A second issue= is that the above wont work when I have the Vms running on MPIO iSCSI stora= ge, so for testing I have moved to NFS4. Anyone have ideas about either issu= e, I’d love to hear ;)</div></div></blockquote><div><br></div><div>= 212; Same - logs would be helpful here.</div></div></div></div></div></div><= /span><div><br></div></div><div>I will continue to dig through this issue an= d will post logs if stuck. I just wanted to know if there was anything obvio= us that I should be doing differently with iSCSI vs NFS with mounting disks/= snapshots.</div></div></blockquote></div></div></div><div dir=3D"auto"><br></d= iv><div dir=3D"auto">— Nope. </div><div dir=3D"auto">— Y.</div>= </div></div></div></span><div><br></div><div>Zip</div><span id=3D"OLK_SRC_BODY= _SECTION" style=3D"color: rgb(0, 0, 0); font-family: Calibri, sans-serif; font= -size: 14px;"><div><div><div dir=3D"auto"><div dir=3D"auto"> </div><div dir= =3D"auto"><br></div><div dir=3D"auto"><div class=3D"gmail_extra"><div class=3D"gmail= _quote"><blockquote class=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #= ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0,0= );font-size:14px;font-family:Calibri,sans-serif"><div><br></div><div>Zip</di= v><div><br></div><span id=3D"m_-5510294568030381310OLK_SRC_BODY_SECTION"><div>= <div><div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div>&= #8212; Y.</div><div class=3D"quoted-text"><div> </div><blockquote class=3D"= gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-lef= t:1ex"><div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font= -family:Calibri,sans-serif"><div><br></div><div>Thanks</div><div><br></div><= div><a href=3D"http://Irc.oftc.net" target=3D"_blank">Irc.oftc.net</a> #ovirt</d= iv><div>zipur</div><div><br></div><br></div><br> ______________________________<wbr>_________________<br> Users mailing list<br><a href=3D"mailto:Users@ovirt.org" target=3D"_blank">User= s@ovirt.org</a><br><a href=3D"http://lists.ovirt.org/mailman/listinfo/users" r= el=3D"noreferrer" target=3D"_blank">http://lists.ovirt.org/mailman<wbr>/listinfo= /users</a><br><br></blockquote></div></div><br></div></div></div></div></spa= n></div></blockquote></div><br></div></div></div></div></div></span></body><= /html> --B_3599464360_122445562--