[Gluster-users] Dovecot and glusterfs

[Pierre Barre]

Le 2014-12-23 11:39, Michael Schwartzkopff a écrit :
> Am 23.12.2014 11:14 schrieb Volnei Puttini <volnei at vcplinux.com.br>:
>> 
>> Hi,
>> 
>> In my experiences, I didn't had success
>> in active/active configurations.
>> Several issues happened. I think that
>> this happened because isn't possible
>> that both Dovecotes works totally synchronized.
> 
> But why? If dovecot uses fcntl() locks everything should be OK. Even
> if both Servers write.
> 
> Any way to debug the issue further?
> 
> Michael.
> 
> 
>> On 23-12-2014 07:55, André Bauer wrote:
>> > -----BEGIN PGP SIGNED MESSAGE-----
>> > Hash: SHA1
>> >
>> > Hi,
>> >
>> > do you have both dovecot servers active?
>> > Im not completly sure if this will work.
>> > Imho you should try an active / passive setup...
>> >
>> > Regards
>> > André
>> >
>> > Am 21.12.2014 um 08:34 schrieb Michael Schwartzkopff:
>> >> Hi,
>> >>
>> >> I wanted t test gluster a little bit for the usage in Dovecot
>> >> Postbox Serves.
>> >>
>> >> I set up two servers with a replicated gluster and mounted the
>> >> bricks via gluster client. On these two nodes I installed dovecot.
>> >> So I created a high available test szenario.
>> >>
>> >> I configured dovecdot to usr maildir format and mainly copied the
>> >> dovecot options for NFS setup:
>> >>
>> >> mail_fsync = always mail_nfs_storage = yes mail_nfs_index = yes
>> >> mmap_disable = yes
>> >>
>> >> Basically that tells dovecot to use fcntl() locks.
>> >>
>> >> With the thunderbird IMAP client I accessed te two postboxes on
>> >> the two node. One client the first dovecot node, the other client
>> >> the second node. Both used the same user, so did access the same
>> >> maildir files.
>> >>
>> >> First everything looked good, but within ten minutes of creating,
>> >> moving and deleting mails and folders I produced the following
>> >> log:
>> >>
>> >> node2 dovecot: imap(user1 at example.net): Error: Corrupted
>> >> transaction log file /srv/mail/user1 at example.net/dovecot.index.log
>> >> seq 3: file_seq=3, min_file_offset (4768) > max_file_offset (3392)
>> >> (sync_offset=3392)
>> >>
>> >> node2 dovecot: imap(user1 at example.net): Error: Index
>> >> /srv/mail/user1 at example.net/dovecot.index: Lost log for seq=3
>> >> offset=2948
>> >>
>> >> node2 dovecot: imap(user1 at example.net): Warning: fscking index
>> >> file /srv/mail/user1 at example.net/dovecot.index
>> >>
>> >> The mailbox was not accessible any more and dovecot did not accept
>> >> any new mails for the user.
>> >>
>> >> Any ideas what went wrong? I this a legitimate use case for
>> >> gluster? Could I prevent this from happening if I restrict oew
>> >> user access only o one gluster node?
>> >>
>> >> Mit freundlichen Grüßen,
>> >>
>> >> Michael Schwartzkopff
>> >>
>> >>
>> >>
>> >> _______________________________________________ Gluster-users
>> >> mailing list Gluster-users at gluster.org
>> >> http://www.gluster.org/mailman/listinfo/gluster-users
>> >>
>> >
>> > - --
>> > Mit freundlichen Grüßen
>> >
>> > André Bauer
>> >
>> > MAGIX Software GmbH
>> > André Bauer
>> > Administrator
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Hello,

Using dbox, and fcntl(), we don't have any problems (our infrastructure 
manage ~ 2 000 000 connections a day).

If you still have problems, you can use 
http://wiki2.dovecot.org/Director


-- 
Best regards,
Pierre Barre.