[lxc-users] Online container backup

[Narcis Garcia]

Why is a snapshot better with database services?
(time matter apart)


El 11/06/15 a les 08:58, Fajar A. Nugraha ha escrit:
> On Thu, Jun 11, 2015 at 1:51 PM, Narcis Garcia <informatica at actiu.net
> <mailto:informatica at actiu.net>> wrote:
> 
>     Debian 8 in a single and tratitional ext4 partition.
>     My idea is that the backup is a complete container export, to be
>     restored in another box if necessary.
> 
> 
> 
> I highly recommend you switch to btrfs or zfs (I use zfs)
> 
>  
> 
>     Is there some newer LXC repository for Debian as ppa:ubuntu-lxc/daily ?
> 
> 
> 
> You have to ask debian folks for that. AFAIK building from source should
> give you the same functionality though.
>  
> 
> 
>     At this moment, my procedure is:
>     $ lxc-stop -n MyGuest
>     $ tar -cjf /var/backups/MyGuest.tar.bz2 /var/lib/lxc/MyGuest
>     $ lxc-start -n MyGuest
>     but container unavailability is too long.
> 
> 
> exactly. With zfs it's simply "zfs snapshot data/lxc/guest at backup-1",
> which often takes less than 1 second (and it doesn't block container IO)
>  
> 
> 
>     Another procedure, but without stopping container:
>     $ cp -aPx /var/lib/lxc/MyGuest /tmp/MyGuest
>     $ tar -cjf /var/backups/MyGuest.tar.bz2 /tmp/MyGuest
> 
> 
> 
> Dangerous. If you have mysql (or another db) running on the container,
> you may be unable to start the it from backup later due to it
> complaining being corrupt.
> 
> -- 
> Fajar
> 
> 
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