Re: [ovirt-users] oVirt 4.2 - Removed disk remains in VM OS with hooks?

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 Disk and delete the Snapshot, the disk remains in the Backup-Appliance-VM as /dev/sdb ot /dev/vdb. If I reboot the Bakup-Applicance-VM the disk disappears. If I manually remove the disk by "echo 1 > /sys/block/sdb/device/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 show it as connected.

I am also not able to attach any other disks as it complains of : HotPlugDiskVDS failed: internal error: unable to execute QEMU command '__com.redhat_drive_add': Duplicate ID 'drive-scsi0-0-0-2' for drive I did see that others in the past have gotten around this issue by rebooting the Backup-Appliance-VM and then continuing on with the next VM backup and looping through backup-reboot-backup-reboot-etc. Anyone have an idea on how to solve this issue and remove the hooks from the guest OS? Steps to reproduce this issue: 1. Create a backup appliance VM to be used for the backup script execution 2. Currently I have the Vms set to virtio with threaded I/O enabled. Also tried virtio_scsi with same result. 3. Using REST API – make snapshot of target VM 4. Using REST API – fetch vm metadata 5. Using REST API – attach the snapshot/disk to the Backup-Appliance-VM 6. dd the drive to backup folder 7. Using REST API – remove the disk from the Backup-Appliance-VM 8. Using REST API – delete the snapshot 9. ** 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.

A second issue is that the above wont work when I have the Vms running on MPIO iSCSI storage, so for testing I have moved to NFS4. Anyone have ideas about either issue, I’d love to hear ;)

Thanks Irc.oftc.net #ovirt zipur _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users