[pve-devel] [PATCH] add qemu guest agent support

Alexandre DERUMIER aderumier at odiso.com
Mon Sep 3 12:15:31 CEST 2012

Because we don't know if the quest agent service is running on the guest.

from guest agent doc:
"1) there is no way for qemu-ga to detect whether or not a client has connected
   to the channel (usually a chardev with a unix socket front-end and
   virtio-serial backend)"

So we can activate it, but we won't receive response.

But,we can use timeout and assume that guest agent is not running ?

exemple : if we want to use guest agent to shutdown

try with guest agent, "guest-shutdown", if no reponse, try with monitor command ?

----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre Derumier" <aderumier at odiso.com>, pve-devel at pve.proxmox.com 
Envoyé: Lundi 3 Septembre 2012 11:45:58 
Objet: RE: [pve-devel] [PATCH] add qemu guest agent support 

> Subject: [pve-devel] [PATCH] add qemu guest agent support 
> this add chardev and virtio-serial devices for communication with guest 
> agent. 
> vmconfig option : 
> qga: 1 

Why do we want to disable that? Does it use any resources (besides the pci address)? 
Any other drawbacks keeping that always enabled? 

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