[Samba] Bi-directional sync for Sysvol folder -- Osync?

Min Wai Chan
Thu, 25 Jun 2015 12:12:04 -0000

Dear Daniel, Klaus

I've try that before
But because of how samba work on the files.

The Advise is No
Without CTDB, you will just shoot yourself on the foot...





On Thu, Jun 25, 2015 at 7:39 PM, Zerwes, Klaus <zerwes at rosalux.de>
wrote:

> Just some notes:
> For master <-> master setup (bi-directional sync) you need AFAIK a
cluster
> filesystem.
> I have no idea how far this is supported w/ samab (ACLs, ...)
>
> Maybe a old tool related to drbd might be worth some testing too:
> http://oss.linbit.com/csync2/
>
> Klaus
>
>
> ________________________________________
> Von: samba-bounces at lists.samba.org [samba-bounces at
lists.samba.org]&quot;
> im Auftrag von &quot;Daniel Carrasco Mar?n [danielmadrid19 at
gmail.com]
> Gesendet: Donnerstag, 25. Juni 2015 12:38
> An: samba at lists.samba.org
> Betreff: Re: [Samba] Bi-directional sync for Sysvol folder -- Osync?
>
> Hi,
>
> I was thinking about bidirectional sync of sysvol and i've a question:
> ?What about DRBD?. You can create a disk partition in every node, create a
> DRBD cluster and then mount that partition on sysvol folder. The
> sincronization is bidirectional and in real time.
>
> For now i've not tested this option, but i've plans to start some
tests.
>
> What is your opinion about this?
>
> Greetings!!
>
> 2015-06-24 20:25 GMT+02:00 Min Wai Chan <dcmwai at gmail.com>:
>
> > Hello,
> >
> > Just to share
> >
> > I've updated the guide to use osync.
> >
> > https://wiki.samba.org/index.php/SysVol_Bidirectional_Replication
> >
> > Enjoy
> >
> > Regards,
> > Min Wai
> >
> > On Wed, Jun 24, 2015 at 2:44 AM, Min Wai Chan <dcmwai at
gmail.com> wrote:
> >
> > > Dear Belle,
> > >
> > > That produce the similar situation.
> > >
> > > Thus I'm trying osync
> > >
> > > And the result are much present according to my test case
> > > And configuration are much streamline.
> > >
> > > However, I'm not sure how it can work with 2 DC or more...
> > >
> > > Thank You
> > >
> > >
> > > On Mon, Jun 22, 2015 at 9:05 PM, L.P.H. van Belle <belle at
bazuin.nl>
> > wrote:
> > >
> > >>  Hai Min Wai Chan,
> > >>
> > >> I have tested it as shown in your example, and your correct.
> > >> I did a few test, but im very buzy atm.
> > >> Few things i noticed.
> > >>
> > >>
> > >> I compaired the rights in linux and these are the same, but
when i
> look
> > >> at the rights in windows, these are different.. :-/
> > >> but wait..
> > >> Sync DC1 => DC2 , files and folder rights are ok, in
windows and in
> > linux
> > >> Sync DC2 => DC1, files and folder rights in windows are
same but
> > >> different compaired to dc1.
> > >>
> > >> ow and i have :
> > >> acl_xattr:ignore system acls = yes
> > >> set on sysvol and netlogon
> > >>
> > >> So can you test also a bit with the following and report
back?
> > >>
> > >> change /etc/cron.d/sysvol-sync  to
> > >>
> > >> */5 * * * *  root  /usr/bin/unison && /usr/bin/rsync
-XAavzu
> --log-file
> > >> /var/log/sysvol-sync.log --delete-after -f"+ */"
-f"- *"
> > >> /var/lib/samba/sysvol root at 192.168.0.2:/var/lib/samba
&> /dev/null
> > >> so i change the order, first unison, then rsync.
> > >> and i added -u in the rsync command.
> > >>
> > >>
> > >>
> > >> Greetz,
> > >>
> > >> Louis
> > >>
> > >>
> > >>  ------------------------------
> > >> *Van:* Min Wai Chan [mailto:dcmwai at gmail.com]
> > >> *Verzonden:* maandag 22 juni 2015 12:41
> > >>
> > >> *Aan:* L.P.H. van Belle
> > >> *CC:* samba at lists.samba.org
> > >> *Onderwerp:* Re: [Samba] Bi-directional sync for Sysvol
folder --
> Osync?
> > >>
> > >>  Dear Belle,
> > >>
> > >> I found some typo on my last email.
> > >>
> > >> 1. DC1 will Remove any empty directory on DC2
> > >> 2. DC1 will overwrite any users/group change on DC2
> > >>
> > >> Please note that all change happen on DC2
> > >>
> > >> Please check on the configuration and log below
> > >> https://gist.github.com/dcmwai/e1237ad7f9d35cef2ed6
> > >>
> > >> Picture with explanation
> > >> 1. 01 All Sync
> > >>
> > >>
> >
>
https://picasaweb.google.com/lh/photo/diyMS_SeKuwXV1dVRQdrYNMTjNZETYmyPJy0liipFm0?feat=directlink
> > >> 2. 02 create files and folder on DC2
> > >>
> > >>
> >
>
https://picasaweb.google.com/lh/photo/A7rQzenAjIfyRAVDBeT5_9MTjNZETYmyPJy0liipFm0?feat=directlink
> > >> 3. DC2 files and folder list with permission.png
> > >>
> > >>
> >
>
https://picasaweb.google.com/lh/photo/7fW8V6JZOgYux6hwQW9jHtMTjNZETYmyPJy0liipFm0?feat=directlink
> > >> 4. DC1 after 1st sync files and folder present, but users
permission
> is
> > >> not correct
> > >>
> > >>
> >
>
https://picasaweb.google.com/lh/photo/-oBXuJLJ6vLT2v1EtdVPSNMTjNZETYmyPJy0liipFm0?feat=directlink
> > >> 5. DC 2 after 1st sync folder2_3 is missing permission on DC1
is not
> > >> correct
> > >>
> > >>
> >
>
https://picasaweb.google.com/lh/photo/mCJZxcOhZkTBZKy3FmsUF9MTjNZETYmyPJy0liipFm0?feat=directlink
> > >> 6. DC1 overwrite permission on DC2
> > >>
> > >>
> >
>
https://picasaweb.google.com/lh/photo/q7vfuj_yQ-RTzbUvunEiBdMTjNZETYmyPJy0liipFm0?feat=directlink
> > >>
> > >>
> > >> Hope this help us to see more in detail on the issue.
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> On Mon, Jun 22, 2015 at 2:43 PM, L.P.H. van Belle <belle
at bazuin.nl>
> > >> wrote:
> > >>
> > >>>  Hello Min Wai Chan,
> > >>>
> > >>> Can you explain more about,, the DC1 will remove any
emptey directory
> > on
> > >>> DC1.
> > >>> tested it here, but that does not occure here.
> > >>> i can create empty directories on DC1, and these are
synced to DC2.
> > >>> empty or not.
> > >>>
> > >>>  DC1 will overwrite any users/group change on DC2
> > >>> if setup correctly, your sysvol rights on DC1 and DC2 are
the same..
> > >>>
> > >>> i suggest you to the following.
> > >>> get the latest version of the script.
> > >>> stop samba on both dcs.
> > >>> copy idmap from DC1 to DC2, and start up again.
> > >>> these last steps are in the latest script also.
> > >>>
> > >>> Greetz,
> > >>>
> > >>> Louis
> > >>>
> > >>>
> > >>>
> > >>>  ------------------------------
> > >>> *Van:* Min Wai Chan [mailto:dcmwai at gmail.com]
> > >>> *Verzonden:* zondag 21 juni 2015 19:23
> > >>> *Aan:* L.P.H. van Belle
> > >>> *CC:* samba at lists.samba.org
> > >>> *Onderwerp:* Re: [Samba] Bi-directional sync for Sysvol
folder --
> > Osync?
> > >>>
> > >>>   Dear Belle,
> > >>>
> > >>> I think I'm using the 1.02 Version as we post
question on Feb.
> > >>>
> > >>> But I don't think there are much different
> > >>>
> > >>> At least when I see from the cron script and also the
unison
> > default.prf
> > >>>
> > >>> I think this script have 2 major issue.
> > >>>
> > >>> 1. DC1 will Remove any empty directory on DC1
> > >>> 2. DC1 will overwrite any users/group change on DC2
> > >>>
> > >>> the last issue I see is that cron.d are sending mail
every 5
> mins..(but
> > >>> I think that can be solved)
> > >>>
> > >>> I've not try osync before...
> > >>>
> > >>> but it look promising...
> > >>>
> > >>> Regards,
> > >>> Min Wai
> > >>>
> > >>>
> > >>>
> > >>> On Fri, Jun 19, 2015 at 2:53 PM, L.P.H. van Belle
<belle at bazuin.nl>
> > >>> wrote:
> > >>>
> > >>>> Hai Min Wai Chan,
> > >>>>
> > >>>> i'll go have a look in osync..
> > >>>> and how do you mean fixour issue? Can you explain
more so i can
> have a
> > >>>> look into that.
> > >>>>
> > >>>> which version are you running..
> > >>>> latest is : 2015-04-30: 1.0.6
> > >>>>
> > >>>> these where the last changes :
> > >>>> # 2014-05-02: 1.0 :  im considering this stable, but
use at own
> risk.
> > >>>> # 2014-05-09: 1.01 : missed sysvol in the cron line.
( sysvol-sync )
> > >>>> # 2014-06-23: 1.02 : added Extra Variable to make
sure syncing is
> done
> > >>>> correct.
> > >>>> # 2015-02-19: 1.0.3: correction in the setup/copy of
the sysvol. (
> no
> > >>>> more /home/samba/sysvol/sysvol )
> > >>>> # 2015-02-24: 1.0.4: corrected the mixed up of PATH
and BASE in line
> > 97
> > >>>> ( now relly no more double sysvol )
> > >>>> # 2015-04-29: 1.0.5: added extra copy of idmap.ldb,
to make sure the
> > >>>> uids/gids on both servers are correct.
> > >>>> #                    samba 4.2.1 did complain about
wrong uid/gids
> in
> > >>>> the sync.
> > >>>> #                    copy of sysvol did not always
work, fixed it,
> > >>>> #                    removed the copy of sysvol on
dc2, due to above
> > >>>> fixed not needed anymore.
> > >>>> # 2015-04-30: 1.0.6: small problems where detected
with the idmap,
> as
> > >>>> suggestedby achim,
> > >>>> #                                        gencache.tdb
is remove
> before
> > >>>> startingsamba again.
> > >>>>
> > >>>>
> > >>>>
> > >>>> >-----Oorspronkelijk bericht-----
> > >>>> >Van: dcmwai at gmail.com [mailto:samba-bounces at
lists.samba.org]
> > >>>> >Namens Min Wai Chan
> > >>>> >Verzonden: donderdag 18 juni 2015 20:04
> > >>>> >Aan: samba at lists.samba.org
> > >>>> >Onderwerp: [Samba] Bi-directional sync for Sysvol
folder -- Osync?
> > >>>>  >
> > >>>> >Hello all,
> > >>>> >
> > >>>> >Just to ask have anyone try osync before?
> > >>>> >https://github.com/deajan/osync
> > >>>> >
> > >>>> >And would you think that this will fix our issue
on
> > >>>>
>https://wiki.samba.org/index.php/SysVol_Bidirectional_Replication
> > >>>> >
> > >>>> >Where DC2 files or folder will be removed?
> > >>>> >
> > >>>> >Thank You.
> > >>>> >--
> > >>>> >To unsubscribe from this list go to the following
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> > >>>> >instructions:
https://lists.samba.org/mailman/options/samba
> > >>>> >
> > >>>> >
> > >>>>
> > >>>> --
> > >>>> To unsubscribe from this list go to the following URL
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> > >>>> instructions:
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> > >>>>
> > >>>
> > >>>
> > >>
> > >
> > --
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