How to backup samba4

[Andrew Bartlett]

On Fri, 2012-08-24 at 13:04 +0200, Stefan (metze) Metzmacher wrote:
> Am 23.08.2012 22:50, schrieb Andrew Bartlett:
> > On Thu, 2012-08-23 at 19:30 +0200, Marc Muehlfeld wrote:
> >> Hi,
> >>
> >> I'm currently planing and testing the final steps for our switch to s4 in 3 
> >> weeks and now got the following two important questions:
> >>
> >> - How do I backup samba4 (databases, etc.) while it's running?
> > 
> > Use tdbbackup on each ldb file. 
> > 
> >> - What do I have to backup from samba (byside the data on the shares) to 
> >> restore the whole AD if neccessary? (/usr/local/samba/private|etc|var + sysvol 
> >> + netlogon folder?
> > 
> > That sounds right. 
> > 
> > There is actually already a script for this:
> > 
> > source4/scripting/bin/samba_backup
> 
> Please not that you should never restore a dc from backup
> if at least one other dc is still working! If you do that
> you'll corrupt the directory as the replication meta data
> get out of sync!
> 
> The best would be a restore command that would change the invocationId,
> and reset the highestCommitedUsn, this is what windows is doing on
> restore...

Indeed.  The best backup is always another fully working server.

Andrew Bartlett

-- 
Andrew Bartlett                                http://samba.org/~abartlet/
Authentication Developer, Samba Team           http://samba.org