[sheepdog] [PATCH] collie/farm: save vmstate objects during cluster-wide snapshot

[Liu Yuan]

On Mon, Jun 24, 2013 at 10:16:59PM +0800, Kai Zhang wrote:
> 
> On Jun 24, 2013, at 8:18 PM, Liu Yuan <namei.unix at gmail.com> wrote:
> 
> > On 06/24/2013 02:04 PM, Kai Zhang wrote:
> >> Without this patch, qemu's 'loadvm' command will fail after
> >> loading cluster-wide snapshot to a new cluster.
> > 
> > Seems that this patch isn't well tested.
> > 
> > #before the save
> > yliu at yliu-K55VM:~/sheepdog$ md5sum store/0/obj/407c2b2500000000
> > 2657263030ea9bd6f54b273ad377a1eb  store/0/obj/407c2b2500000000
> > #after load
> > yliu at yliu-K55VM:~/sheepdog$ md5sum store/0/obj/407c2b2500000000
> > 1d42bb5c3a6b47c2fc45019228f94a17  store/0/obj/407c2b2500000000
> > 
> > And
> > yliu at yliu-K55VM:~/sheepdog$ ../qemu/x86_64-softmmu/qemu-system-x86_64 --enable-kvm -m 1024 -hda sheepdog:test -loadvm 1
> > qemu-system-x86_64: Error -22 while loading VM state
> > 
> > The loadvm failed.
> > 
> 
> I failed to reproduce this error in my environment.
> And the patch can work fine on my ubuntu server.
> Could you find some hints from the sheep.log?

I tried it on my 12.04 destop several times, and it stills fails

yliu at yliu-K55VM:~/sheepdog$ collie/collie cluster snapshot save tag snapshot/
yliu at yliu-K55VM:~/sheepdog$ sha1sum store/0/obj/407c2b2500000000 
363a4f0ca8d7e3ce9e10bd7b438912006f495503  store/0/obj/407c2b2500000000
yliu at yliu-K55VM:~/sheepdog$ sha1sum store/0/obj/407c2b2500000000 
363a4f0ca8d7e3ce9e10bd7b438912006f495503  store/0/obj/407c2b2500000000
yliu at yliu-K55VM:~/sheepdog$ collie/collie cluster snapshot list  snapshot/
Index		Tag		Snapshot Time
1		tag		Mon Jun 24 23:30:57 2013
yliu at yliu-K55VM:~/sheepdog$ collie/collie cluster snapshot load tag snapshot/
    __
   ()'`;
   /\|`
  /  |   Caution! The cluster is not empty.
(/_)_|_  Are you sure you want to continue? [yes/no]: yes
using backend plain store
yliu at yliu-K55VM:~/sheepdog$ sha1sum store/0/obj/407c2b2500000000 
e52614830cf50c418d99128eb899aede6f22b9c4  store/0/obj/407c2b2500000000
yliu at yliu-K55VM:~/sheepdog$ ../qemu/x86_64-softmmu/qemu-system-x86_64 --enable-kvm -m 1024 -hda sheepdog:test -loadvm 1
qemu-system-x86_64: Error -22 while loading VM state

Thanks,
Yuan