Re: Question about Ceph and Snapshots

[Wido den Hollander]

On 08/25/2014 04:31 AM, Mike Tutkowski wrote:
Hey Wido,

Can you point me in the right direction to examine the code related to
volume snapshots being taken when Ceph is being used for primary storage?

I don't see a Ceph storage plug-in that implements the takeSnapshot method.

There is no specific code in the Management Server since it's all done 
by the KVM Agent.

You'll find most code in the LibvirtStorageAdapter in the KVM plugin 
code. That's where it takes the snapshots and copies it over ti 
Secondary Storage.


In particular, I'm curious how the backup process works.


In short, it asks Qemu to copy the RBD image to a QCOW2 file on 
Secondary Storage.

Wido

Thanks!