[libvirt-users] Copy volume from one storage to another

Discussion:

Shashwat shagun

2018-08-08 15:22:43 UTC

Hi,
I want to copy a volume from one to pool to another pool through libvirt golang api but Iâm unaware of any such functions. Can anybody guide me a little bit here?

Best Regards,
Shashwat Shagun
***@shashwat.tech

Daniel P. Berrangé

2018-08-08 15:27:16 UTC

Permalink

Post by Shashwat shagun
Hi,
I want to copy a volume from one to pool to another pool through
libvirt golang api but I’m unaware of any such functions. Can
anybody guide me a little bit here?

The "StorageVol" interface in Go provides "Upload" and "Download" methods
that associate a "Stream" with the volumes.

So you'd call Download on the original vol, Upload on the target vol, and
read from one stream, and write to the other stream.

Regards,
Daniel

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Vasiliy Tolstov

2018-08-08 16:08:09 UTC

Permalink

If two pools on the same nore I'm recommend to use createvolfromxml. In
this case libvirt do internal copy on the node via qemu-img.
Download/upload takes all data on node that runs client.

Post by Shashwat shagun
Hi,
I want to copy a volume from one to pool to another pool through libvirt
golang api but Iâm unaware of any such functions. Can anybody guide me a
little bit here?
Best Regards,
Shashwat Shagun
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