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Re: [virt-tools-list] [virt-manager][PATCH ] Add option to control whether to leave VM running when closing console.



On 07/02/2013 06:20 AM, Daniel P. Berrange wrote:
On Mon, Jul 01, 2013 at 02:18:27PM -0400, Cole Robinson wrote:
On 06/28/2013 01:49 PM, Leonardo Garcia wrote:
From: Leonardo Garcia <lagarcia br ibm com>

It is sometimes counter intuitive for a desktop user that the virtual machine
continues to run when they left the console viewer application. They are used
that when they close an application all the resources being used by it are also
freed up, and from their perspective, the console viewer is just one more
application running.
Hmm, I don't know if I buy this. Closing a VNC client window doesn't shut down
the remote machine, nor does exiting an SSH connection. And doing virt-manager
--uuid <blah> doesn't auto-start an inactive VM so users are forced to
recognize this concept IMO.

There's also the issue that reliably shutting down a VM in a safe way is hard:
shutdown often doesn't do what's expected, and destroy is potentially
dangerous. If we just kick off 'shutdown' on exit then the user may not notice
for a long time that the VM never shut down.
FWIW, on exit, GNOME Boxes will  either suspend all VMs, or do a managed
save on them.  It definitely makes sense from Boxes POV, since it is trying
not to expose "VM" as concept/object that the user needs to manage. They just
have a number of operating systems they can interact with.
Yes, that might be more in line with the view I am trying to address.

I think this POV doesn't really make sense to virt-manager though, since it
is really about exposing virtual machine management. In addition, virt-manager
is not tied to a single machine, it can manage arbitrary machines & it definitely
does not make sense to suspend VMs when disconnecting from any remote host.
I might agree with that and I can change the code to be only valid is the VM is running locally.

I think I'd be more comfortable with just recommending a wrapper script if
someone really wants this functionality, it's basically:
I'd suggest that people just use GNOME Boxes if they want this kind of
UI interaction model for their VMs.  Different use case, different app.
I might not completely agree with that. One of the issues I see with the open source tools is that we have too many tools to do almost the same thing. I understand and believe that choice is good, but sometimes we are just replicating too much work IMHO. And end users not always understand that.

Best regards,

Leonardo Garcia

Daniel


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