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

Daniel Carrasco Marín
2015-06-25T10:38:05Z

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.
> >>>> >--
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> >>>> >instructions:
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> >>>> >
> >>>> >
> >>>>
> >>>> --
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> >>>> instructions:
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> >>>>
> >>>
> >>>
> >>
> >
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