search for: your_cool_cp

Hi, Is it possible to "pivot" to a new image without doing blockcopy or blockpull? I know how to use snapshots and blockpull to create a new image and pivot to using it live, but what I would like to do is to have a VM switch from using imageA.qcow2 to image2.qcow2 while running. I don't see why this wouldn't be possible since some of the existing libvirt tools can do this when

...s you pivot to any destination format (does not have to be qcow2). Roughly: $ # create a qcow2 wrapper $ virsh snapshot-create-as $dom --no-metadata --disk-only \ --diskspec vda,file=wrapA $ # copy the backing file to the pivot location, ideally \ taking advantage of faster-than-cp methods $ $your_cool_cp imageA imageB $ # create a destination qcow2 file $ qemu-img create -f qcow2 -obacking_file=imageB,backing_fmt=$fmt wrapB $ # block copy - note below that you may need to make $dom transient $ virsh blockcopy $dom vda wrapB --shallow --reuse-external --pivot \ --verbose $ # commit the wrapper bac...

...does not have to be > qcow2). Roughly: > > $ # create a qcow2 wrapper > $ virsh snapshot-create-as $dom --no-metadata --disk-only \ > --diskspec vda,file=wrapA > $ # copy the backing file to the pivot location, ideally \ > taking advantage of faster-than-cp methods > $ $your_cool_cp imageA imageB > $ # create a destination qcow2 file > $ qemu-img create -f qcow2 -obacking_file=imageB,backing_fmt=$fmt wrapB > $ # block copy - note below that you may need to make $dom transient > $ virsh blockcopy $dom vda wrapB --shallow --reuse-external --pivot \ > --verbose &...

...w2). Roughly: >> >> $ # create a qcow2 wrapper >> $ virsh snapshot-create-as $dom --no-metadata --disk-only \ >> --diskspec vda,file=wrapA >> $ # copy the backing file to the pivot location, ideally \ >> taking advantage of faster-than-cp methods >> $ $your_cool_cp imageA imageB >> $ # create a destination qcow2 file >> $ qemu-img create -f qcow2 -obacking_file=imageB,backing_fmt=$fmt wrapB >> $ # block copy - note below that you may need to make $dom transient >> $ virsh blockcopy $dom vda wrapB --shallow --reuse-external --pivot \ &g...