On 08/29/2013 08:53 AM, Carlos Martín Sánchez wrote:
Hi,
On Thu, Aug 29, 2013 at 4:18 PM, Svancara, Randall <[email protected]
<mailto:[email protected]>> wrote:
Hi,
I read the documentation for Open Nebula. I understand that raw
disks with KVM do not support snapshots (ok, I understand this is
a technical limitation and I am migrating to qcow)
However if I go to the Virtual Machines, click on the virtual
machine and then select the storage tab, there is an option for
snapshot.
Here is where I believe the documentation falls apart for this
tool. What is the difference between snapshots in the snapshot
tab and snapshot under storage.
The VM guide has two sections, one for disk snapshots [1], and another
for system snapshots [2]
Also if I attempt to use the snapshot under storage, I see this
rather vague error:
Error
[VirtualMachineSaveDisk] Cannot use selected DISK. The DISK 0 is
already going to be saved.
I have to make this product available for less technical users.
So first of all, what does this even mean. Second of all, is
there any way to provide a more intuitive error message??? I do
not see anywhere in the interface where there is something about
DISK 0 is going to be saved or a status of a scheduled job.
Out of context, it is a vague error message. But to get this message,
you have to perform a disk snapshot, and the wizard contains a tooltip
explaining what it will do:
I will have to dig through the other error logs to provide this
context. Maybe qcow2 is a better format for disks???
Sets the specified VM disk to be saved in a new Image.
Deferred: The Image is created immediately, but the contents are saved
only if the VM is shut down gracefully (i.e., using Shutdown; not Delete)
Hot: The Image will be saved immediately.
The Storage disk table also contains a "save as" column, that after a
disk snapshot operation is filled with that new Image's ID.
So, it basically means that you cannot save the disk in a new Image,
because the disk is already going to be saved...
The best way to simplify OpenNebula for less technical users is to cut
down the number of features exposed to them.
We allow this via Sunstone views, take a look at the cloud view [3].
Regards
[1] http://opennebula.org/documentation:rel4.2:vm_guide_2#disk_snapshoting
[2] http://opennebula.org/documentation:rel4.2:vm_guide_2#snapshotting
[3] http://opennebula.org/documentation:rel4.2:suns_views#cloud_view
--
Join us at OpenNebulaConf2013 <http://opennebulaconf.com/> in Berlin,
24-26 September, 2013
--
Carlos Martín, MSc
Project Engineer
OpenNebula - The Open-source Solution for Data Center Virtualization
www.OpenNebula.org <http://www.opennebula.org/> |
[email protected] <mailto:[email protected]> | @OpenNebula
<http://twitter.com/opennebula>
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