libvirt users - Oct 2015 - Re: failed to pivot job for disk vdc

Hello,

I did a virsh snapshot-create-as --domain meta sn1 --diskspec
 vda,file=/var/lib/libvirt/images/meta-sn1.qcow2 --disk-only
 --atomic --no-metadata

Then I successfully blockcommitted 2 disks:
virsh blockcommit meta vda --active --verbose --pivot
virsh blockcommit meta vdb --active --verbose --pivot

But when doing
virsh blockcommit meta vdc --active --verbose --pivot
I got:
Block commit: [100 %]error: failed to pivot job for disk vdc
error: block copy still active: disk 'vdc' not ready for pivot yet
Domain snapshot sn1 created

And now it looks like this:
virsh domblklist meta
Target     Source
------------------------------------------------
vda        /var/lib/libvirt/images/meta.qcow2
vdb        /var/lib/libvirt/images/meta-home.qcow2
vdc        /var/lib/libvirt/images/meta-pgsql.sn1

How do I make vdc to be the initial disk, not the snapshot one?

Regards,
Nerijus

Nerijus Baliunas <nerijus@...> writes:
> How do I make vdc to be the initial disk, not the snapshot one?
I powered off the VM, with "virsh edit meta" changed vdc 
source file from meta-pgsql.sn1 to meta-pgsql.qcow2 and
started VM. Is it possible to achieve this without powering
off VM?

Thanks,
Nerijus

Hello,

it happened with another VM: 

# virsh snapshot-create-as --domain rasa sn1 --diskspec
 vda,file=/var/lib/libvirt/images/rasa-sn1.qcow2 --disk-only
 --atomic --no-metadata

# virsh blockcommit rasa vda --active --verbose --pivot
Block commit: [100 %]error: failed to pivot job for disk vda
error: block copy still active: disk 'vda' not ready for pivot yet

# virsh domblklist rasa
Target     Source
------------------------------------------------
vda        /var/lib/libvirt/images/rasa-sn1.qcow2

If blockcommit had succeeded, it would be now:
vda        /var/lib/libvirt/images/rasa.qcow2

Now both files rasa.qcow2 and rasa-sn1.qcow2 are written to, and
# virsh blockjob rasa vda
Active Block Commit: [100 %]

But trying to virsh blockcommit rasa vda --active --verbose --pivot once more:
error: block copy still active: disk 'vda' already in active block job

How do I make rasa.qcow2 the only active vda?

I use qemu-kvm-ev-2.3.0-29.1.el7.

Thanks,
Nerijus