Fwd: How to backup samba4

[Andrew Bartlett]

On Tue, 2012-08-28 at 22:36 +0200, steve wrote:
> On 08/28/2012 06:59 PM, Gémes Géza wrote:
> > Forwarded to list
> >> As quoted by :
> >> Stefan (metze) Metzmacher metze at samba.org <mailto:metze at samba.org>
> >>
> >>
> >> Aug 24
> >>
> >> "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... "
> >>
> >> If you have an active DC, join it like a secondary and let it 
> >> replicate, then you will be back up and running :) (At least that is 
> >> my understanding of replication)
> >>
> >> Ricky
> >>
> >> On Tue, Aug 28, 2012 at 11:50 AM, Gémes Géza <geza at kzsdabas.hu 
> >> <mailto:geza at kzsdabas.hu>> wrote:
> >>
> >>     2012-08-28 17:34 keltezéssel, steve írta:
> >>
> >>         On 24/08/12 13:31, Andrew Bartlett wrote:
> >>
> >>             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:
> >>
> >>
> >>
> >>                     There is actually already a script for this:
> >>
> >>                     source4/scripting/bin/samba_backup
> >>
> >>
> >>         How about the restore process?
> >>         1. Stop samba
> >>         2. 'unbzip' the 3 backup files
> >>         3. rsync them back to etc, sysvol and private respectively
> >>
> >>         Does that sound OK?
> >>
> >>         Cheers,
> >>         Steve
> >>
> >>     Only if the box to restore is the only Samba4/WindowsAD in your
> >>     forest.
> >>
> >>     Regards
> >>
> >>     Geza Gemes
> >>
> >>
> >>
> >>
> >> -- 
> >>
> >>
> Hi Geza
> I suppose what you're really saying is that right now, there is no way 
> to backup and restore a system with 2 or more DC's. No amount of Vbox 
> snapshots, rsync's and samba-backups will get you back from a screwed up 
> system to where you were before.

That isn't the case.  But metze is recommending against using a
file-based restoration on more than one DC.  Instead, the other DCs
should forcibly re-sync over DRS.

Andrew Bartlett

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