[Gluster-users] frequent split-brain with Gluster + Samba + Win client

[Tiemen Ruiten]

Sorry, I seem to have messed up the subject.

I should add, I'm mounting these volumes through GlusterFS FUSE, not the
Samba VFS plugin.
 
On 06-08-14 21:47, Tiemen Ruiten wrote:
> Hello,
>
> I'm running into some serious problems with Gluster + CTDB and Samba.
> What I have:
>
> A two node replicated gluster cluster set up to share volumes using
> Samba setup according to this guide:
> https://download.gluster.org/pub/gluster/glusterfs/doc/Gluster_CTDB_setup.v1.pdf
>
> When we edit or copy files into the volume via SMB (from a Windows
> client accessing through a samba file share) this inevitably leads to
> a split-brain scenario. For example:
>
> gluster> volume heal fl-webroot info
> Brick ankh.int.rdmedia.com:/export/glu/web/flash/webroot/
> <gfid:0b162618-e46f-4921-92d0-c0fdb5290bf5>
> <gfid:a259de7d-69fc-47bd-90e7-06a33b3e6cc8>
> Number of entries: 2
>
> Brick morpork.int.rdmedia.com:/export/glu/web/flash/webroot/
> /LandingPage_Saturn_Production/images
> /LandingPage_Saturn_Production
> /LandingPage_Saturn_Production/Services/v2
> /LandingPage_Saturn_Production/images/country/be
> /LandingPage_Saturn_Production/bin
> /LandingPage_Saturn_Production/Services
> /LandingPage_Saturn_Production/images/generic
> /LandingPage_Saturn_Production/aspnet_client/system_web
> /LandingPage_Saturn_Production/images/country
> /LandingPage_Saturn_Production/Scripts
> /LandingPage_Saturn_Production/aspnet_client
> /LandingPage_Saturn_Production/images/country/fr
> Number of entries: 12
>
> gluster> volume heal fl-webroot info
> Brick ankh.int.rdmedia.com:/export/glu/web/flash/webroot/
> <gfid:0b162618-e46f-4921-92d0-c0fdb5290bf5>
> <gfid:a259de7d-69fc-47bd-90e7-06a33b3e6cc8>
> Number of entries: 2
>
> Brick morpork.int.rdmedia.com:/export/glu/web/flash/webroot/
> /LandingPage_Saturn_Production/images
> /LandingPage_Saturn_Production
> /LandingPage_Saturn_Production/Services/v2
> /LandingPage_Saturn_Production/images/country/be
> /LandingPage_Saturn_Production/bin
> /LandingPage_Saturn_Production/Services
> /LandingPage_Saturn_Production/images/generic
> /LandingPage_Saturn_Production/aspnet_client/system_web
> /LandingPage_Saturn_Production/images/country
> /LandingPage_Saturn_Production/Scripts
> /LandingPage_Saturn_Production/aspnet_client
> /LandingPage_Saturn_Production/images/country/fr
>
>
>
> Sometimes self-heal works, sometimes it doesn't:
>
> [2014-08-06 19:32:17.986790] E
> [afr-self-heal-common.c:2868:afr_log_self_heal_completion_status]
> 0-fl-webroot-replicate-0:  entry self heal  failed,   on
> /LandingPage_Saturn_Production/Services/v2
> [2014-08-06 19:32:18.008330] W
> [client-rpc-fops.c:2772:client3_3_lookup_cbk] 0-fl-webroot-client-0:
> remote operation failed: No such file or directory. Path:
> <gfid:a89d7a07-2e3d-41ee-adcc-cb2fba3d2282>
> (a89d7a07-2e3d-41ee-adcc-cb2fba3d2282)
> [2014-08-06 19:32:18.024057] I
> [afr-self-heal-common.c:2868:afr_log_self_heal_completion_status]
> 0-fl-webroot-replicate-0:  gfid or missing entry self heal  is
> started, metadata self heal  is successfully completed, backgroung
> data self heal  is successfully completed,  data self heal from
> fl-webroot-client-1  to sinks  fl-webroot-client-0, with 0 bytes on
> fl-webroot-client-0, 168 bytes on fl-webroot-client-1,  data - Pending
> matrix:  [ [ 0 0 ] [ 1 0 ] ]  metadata self heal from source
> fl-webroot-client-1 to fl-webroot-client-0,  metadata - Pending
> matrix:  [ [ 0 0 ] [ 2 0 ] ], on
> /LandingPage_Saturn_Production/Services/v2/PartnerApiService.asmx
>
> *More seriously, some files are simply missing on one of the nodes
> without any error in the logs or notice when running gluster volume
> heal $volume info.*
>
> Of course I can provide any log file necessary.
>
> -- 
> Tiemen Ruiten
> Systems Engineer
> R&D Media

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