[Dovecot] Basic clustered filesystem advice (was: Re: Expunged message reappeared, giving a new UID)

[Simon Fraser]

Time marches on, and I need to continue the service migration. I'd still
like to use Dovecot (we're migrating away from Cyrus).  I'm assuming the
only other alternative without existing shared storage is to use DRBD
and a cluster file system to provide the replication, and to ensure
Director is enabled.  Are there any things to watch for surrounding
this? 

Simon.


On Fri, 2013-08-30 at 09:49 +0100, Simon Fraser wrote:
> On Mon, 2013-08-19 at 12:08 +0100, Simon Fraser wrote:
> > Are there any more tests I can run for this? 
> 
> I've tried an ssh-based replication configuration, and still experience
> the same symptoms. Going through a director proxy also doesn't help (as
> expected, that one, since I was already only connecting to one of the
> servers)
> 
> Simon.
> 
> > On Thu, 2013-08-08 at 09:21 +0100, Simon Fraser wrote:
> > > On Tue, 2013-08-06 at 19:15 +0300, Timo Sirainen wrote:
> > > 
> > > > > Presumably it's thinking the "-r /tmp/dsync-rawlog" is a mail location?
> > > > > I've tried changing its location in the appends, but it doesn't make a
> > > > > difference. 
> > > > 
> > > > Oops, I messed up the parameter order. It was supposed to have -s state but now it had -s -r rawlog state. New patch should work better.
> > > 
> > > I ran two tests: one using 'doveadm expunge' and one deleting the
> > > message using mutt. Since the hosts mentioned so far have a copy of my
> > > full mailbox on, I re-ran the tests (with the same results) on a test
> > > server with a fresh mailbox on, so there was no extra folder
> > > synchronisation in there to fill up the rawlog. 
> > > 
> > > Those log entries are too big for the mailing list (70k+), so are here:
> > > 
> > > 'doveadm expunge' dsync-rawlog node A
> > > http://pastebin.com/LtUnENPv
> > > 
> > > 'doveadm expunge' dsync-rawlog node B
> > > http://pastebin.com/QaWLyZq2
> > > 
> > > imap expunge dsync-rawlog node A
> > > http://pastebin.com/SuFdWn0w
> > > 
> > > imap expunge dsync-rawlog node B
> > > http://pastebin.com/Ex66s7hq
> > > 
> > > Mail logs on both contain entries like this:
> > > Aug  6 18:04:37 dcot2a dovecot: master: Dovecot v2.2.5 starting up (core
> > > dumps disabled)
> > > Aug  6 18:04:38 dcot2a dovecot: doveadm: Error: Don't give mail location
> > > with -d parameter
> > > 
> > > Simon.
> > > 
> > > 
> > > 
> > 
> > 
> > 
> > 
> > 
> 
> 
> 
> 
> 





-- 
 The Wellcome Trust Sanger Institute is operated by Genome Research 
 Limited, a charity registered in England with number 1021457 and a 
 company registered in England with number 2742969, whose registered 
 office is 215 Euston Road, London, NW1 2BE.