[Users] live migration inside one physical node

[Kir Kolyshkin]

On 09/08/2015 06:12 AM, Nick Knutov wrote:
>   This way takes time. It's definitely not _live_ migration (

You mean, ploop copy is not used? Yes I think you can use ploop copy
for moving the top ploop delta to another location. Here's how:

0. figure out $VE_ROOT and $VE_PRIVATE (use vzlist -H -o root,private 
$CTID).

1. figure out ploop device (/dev/ploopXXX) and top delta (relative to 
VE_PRIVATE)
for the given CT -- reuse get_ploop_info() function from vzmigrate script.

2. copy everything but top delta to new location (in vzmigrate we do
rsync --exclude $VE_PRIVATE/$TOP_DELTA, guess you can do something
similar with cp).

3. run ploop copy; for the local case it will be as easy as

   ploop copy -s $PLOOP_DEV -d $NEW_VE_PRIVATE/$TOP_DELTA -F "vzctl 
suspend $CTID --suspend"

4. move the CT mount to the new place:

  mount --move $VE_PRIVATE $NEW_VE_PRIVATE

5. change VE_PRIVATE:

  vzctl set $CTID --private $NEW_VE_PRIVATE --save

6. restore container

  vzctl suspend $CTID --resume

With these details, you'll be able to write the proper script in no time,
and I'll be happy to review it for you.

Kir.

>
>
> 08.09.2015 14:00, Kevin Holly [Fusl] ?????:
> > Hi! > > You can just do "vzctl suspend CTID", move the container to 
> another place and then restore it there with "vzctl restore CTID" 
> after you changed the configuration file. > > On 09/08/2015 07:14 AM, 
> Nick Knutov wrote: > > > Is it possible to do live migration between 
> physical disks inside one > > physical node? > > > I suppose the 
> answer is still no, so the question is what is possible to > > do for 
> this? > > > _______________________________________________ > Users 
> mailing list > Users at openvz.org > 
> https://lists.openvz.org/mailman/listinfo/users
>
> - -- 
> Best Regards,
> Nick Knutov
> http://knutov.com
> ICQ: 272873706
> Voice: +7-904-84-23-130
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