Hi Juan Carlos, I had inquired internally at WR. My current understanding is that one does not "launch an instance from a volume snapshot", except in the form presented by Horizon interface. In that case, the behaviour of Horizon form is to create a volume from volume snapshot and launch the instance from the new volume. In your email you listed CLI commands and the command you listed showed that you launched the instance from volume, not from volume snapshot. So there's no reason to believe the volume snapshot should be locked from deletion. Moreover, it doesn't make sense for an instance to run from a volume snapshot - that's not what a snapshot is. The snapshot itself should be a static thing. You could probably have used the "openstack volume create --snapshot ..." command option to create a volume from volume snapshot, and then launch an instance from the new volume. The volume snapshot in this case would not be locked from deletion, neither the original volume from which the snapshot was based, but only the new volume you created. I hope this information is accurate and helpful :) I'll forward the response to the guys I inquired with, and they can correct me here if anything I wrote is amiss. M On 2018-10-17 11:47 a.m., Alonso, Juan Carlos wrote:
Hello,
Does anybody has faced the same behavior? I am wondering if it is possible to delete a snapshot, or not, when an instance is up and running. In my site, I could, but need to know if this is correct or not.
Regards. Juan Carlos Alonso
From: Alonso, Juan Carlos Sent: Tuesday, October 16, 2018 3:14 PM To: starlingx-discuss@lists.starlingx.io Subject: [Starlingx-discuss] Delete snapshot and volume
Hi,
The test 211[1] indicates that an Image should be created, then a Volume should be created from the image, then a Snapshot should be created from the Volume and finally an Instance should be launch from the Snapshot. The test indicates that we try to delete the Snapshot and Volume while the Instance is running, Snapshot nor Volume cannot be deleted. But when tried found that the Snapshot can be deleted, but the Volume cannot.
Is this behavior correct?
Those are the commands I used:
openstack image create --disk-format qcow2 --file /home/wrsroot/cirros-0.4.0-x86_64-disk.img --public cirros openstack volume create --image cirros --availability-zone nova --size 1 cirros-vol openstack volume snapshot create --name cirros-snap cirros-vol openstack server create --volume cirros-vol --flavor m1.small --availibility-zone nova vm-cirros
1 https://wiki.openstack.org/wiki/StarlingX/stx.2018.10_Testplan_Instructions
Regards. Juan Carlos Alonso
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