Open Stack

On 8/4/2017 8:41 AM, Tom Kennedy wrote:
> Is there an Openstack document that shows how to extend openstack to do 
> something like this?

The create snapshot API is this in upstream Nova:

https://developer.openstack.org/api-ref/compute/#create-image-createimage-action

There is no distinction between a live and cold snapshot in the end user 
REST API. That's dependent on the backend compute driver. For example, 
the libvirt driver may attempt to perform a live snapshot if possible, 
but falls back to a cold snapshot if that's not possible. Other drivers 
could do the same.

As for the difference between the OpenStack concept of a snapshot and 
the VMware concept of a snapshot, I don't know what that is, but I can 
saw we wouldn't add a VMware-specific REST API for snapshots to the 
compute API when we already have the createImage API. So some design 
work would be involved if you wanted to upstream this.

For information on contributing features to Nova, you can start here:

https://docs.openstack.org/nova/latest/contributor/blueprints.html

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Thanks,

Matt