[Devel] Patch for vzctl reinstall

[Kevin Holly [Fusl]]

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Hi Pavel,

then, the only thing which comes into my mind again is just to destroy
the partition table (ploop mount the root.hdd to /dev/ploopXXX..., run
parted -s /dev/sdb 'mklabel gpt'), then mount the /dev/ploopXXX to
/vz/root/<CTID>/, extract the .tar.gz there and umount everything.

But(!) I'm not pretty sure if this also destroys/breaks snapshots or
not. Has to be tested first ofc :)

On 11/29/2014 09:31 AM, Pavel Odintsov wrote:
> Hello, Kevin!
> 
> Thank you for your feedback!
> 
> We selected this approach because rm -rf on /vz/root/CTID/* can 
> consume big amount of time due to "millions of files" inside
> image.
> 
> From VPS provider side is very important provide to ability to 
> customer for fast container reinstall and we did it. But we did
> backup after any reinstall operation (on ploop level too) for fast
> restore in emergency case.
> 
> On Sat, Nov 29, 2014 at 4:29 AM, Kevin Holly [Fusl] 
> <openvz at lists.dedilink.eu> wrote: Hi Pavel,
> 
> you really want to destroy a containers private directory on 
> reinstall? Think about snapshots, they are stored in the private 
> directory! For example, I want to snapshot a container, reinstall
> it for testing things and then want to restore a previous snapshot 
> because the thing I wanted to test did not work.
> 
> It would be better to just mount the filesystem of the container, 
> delete the content within it and extract the .tar.gz file into it. 
> Instead of deleting the content, you could also just mount the
> ploop device to /dev/ploopXXX, remove the partition and recreate
> it, then mount and extract the .tar.gz file.
> 
> On 11/28/2014 08:28 PM, Pavel Odintsov wrote:
>>>> Hello, folks!
>>>> 
>>>> Please take a look on my patch for vzctl reinstall ability.
>>>> It's very useful because reinstalling of already created
>>>> ploop container is a real pain.
>>>> 
>>>> Thank you!
>>>> 
>>>> 
>>>> 
>>>> _______________________________________________ Devel mailing
>>>> list Devel at openvz.org
>>>> https://lists.openvz.org/mailman/listinfo/devel
>>>> 
> 
>> _______________________________________________ Devel mailing
>> list Devel at openvz.org 
>> https://lists.openvz.org/mailman/listinfo/devel
> 
> 
> 

- -- 
Best regards

Kevin Holly - root at hallowe.lt - http://hallowe.lt/
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