Dsync config help

[Aki Tuomi]

Hi! You can either send me the new text or I can send you the "password". 

Aki Tuomi 
Dovecot oy 


> On September 1, 2016 at 8:58 PM Jean-Luc Wasmer <dovecot at jl.wasmer.ca> wrote:
> 
> 
> Looks like I'm having a conversation with myself! lol
> 
> To avoid the timeouts, I removed the "replication_sync_timeout" setting. 
> It did work and also I don't get the "out of memory errors". I guess 
> they were related.
> I also figured the "permission denied" errors: there was a typo in one 
> of the "mode" in my config file.
> 
> 
> So to recap, here are the issues I couldn't fix:
> 
> - replication_sync_timeout generates a lot of time out error resulting 
> in out of memory errors.
> 
> - users outside the valid uid range [first_valid_uid;last_valid_uid] 
> won't be synced but will still generate a lot of errors
> 
> 
> The wiki page is of poor quality... it would need to be rewritten. I'm 
> willing to do it if someone can tell me how to go about doing that. I'n 
> not expecting any reply though...
> 
> Cheers,
> Jean-Luc
> 
> On 2016-08-31 21:01, Jean-Luc Wasmer wrote:
> > I was able to workaround the “Error: sync:
> > /var/run/dovecot/auth-userdb: Configured passdbs don’t support
> > credentials lookups (to see if user is proxied, because doveadm_port
> > is set)” problem: 
> > 
> > => I simply disabled “doveadm_port” and added the port number at the
> > end of the remote URL in “mail_replica”
> > 
> > 
> > Replication seems to work although I have regular errors (idk if they
> > are related to each other or not).
> > I’ve attached excerpts from the log files but here are the different 
> > errors:
> > 
> > 
> > - out of memory errors:
> > Aug 31 21:37:10 serverA dovecot: replicator: Panic: data stack: Out of
> > memory when allocating 268435496 bytes
> > 
> > 
> > 
> > - timeout errors:
> > 
> > Aug 31 21:36:41 serverA dovecot: dsync-server(user1): Warning:
> > replication(user1): Sync failure: Timeout in 2 secs
> > 
> > Aug 31 21:37:09 serverA dovecot: dsync-local(user1): Error: Couldn't
> > lock /home/user1/.dovecot-sync.lock: Timed out after 30 seconds
> > 
> > Aug 31 21:38:34 serverA dovecot: imap(user2): Warning:
> > replication(user2): Sync failure: Timeout in 2 secs
> > 
> > 
> > 
> > - permission denied errors:
> > 
> > Aug 31 21:37:14 serverA dovecot: dsync-server(user2): Error:
> > net_connect_unix(/var/run/dovecot/replicator-doveadm) failed:
> > Permission denied
> > 
> > 
> > 
> > 
> > 
> > I also get errors for user “nobody” with uid 65534. To avoid them I 
> > added 
> > 10-mail.conf:first_valid_uid = 2000
> > 10-mail.conf:last_valid_uid = 3000
> > 
> > 
> > 
> > but I still get some errors, different ones now:
> > 
> > 
> > Sep  1 00:13:42 shaun dovecot: doveadm(a.b.c.d,nobody): Error: Mail
> > access for users with UID 65534 not permitted (see first_valid_uid in
> > config file, uid from userdb lookup).
> > Sep  1 00:13:42 shaun dovecot: doveadm(a.b.c.d,nobody): Error:
> > dsync-server: User init failed
> > Sep  1 00:14:00 shaun dovecot: doveadm(nobody): Error: sync: Failed to
> > start remote dsync-server command: Remote exit_code=75
> > 
> > 
> > 
> > 
> > 
> > Jean-Luc
> > 
> > 
> > 
> >> On Aug 31, 2016, at 12:02 AM, Jean-Luc Wasmer <dovecot at jl.wasmer.ca> 
> >> wrote:
> >> 
> >> 
> >> Hi,
> >> 
> >> 
> >> I'm trying to sync emails between server A and B.
> >> A has replicator, aggregator and doveadm.
> >> B only has doveadm for now.
> >> 
> >> 
> >> I'm getting the following error:
> >> 
> >> 
> >> Error: sync: /var/run/dovecot/auth-userdb: Configured passdbs don't 
> >> support credentials lookups (to see if user is proxied, because 
> >> doveadm_port is set)
> >> 
> >> 
> >> I'm not sure why I'm getting this error because I authenticate using 
> >> PAM 
> >> and when I run
> >> I do have a "service auth" enabled though... it's used for Postfix 
> >> SASL 
> >> to authenticate SMTP.
> >> 
> >> 
> >> I'm running
> >> 
> >> 
> >> # dovecot --version
> >> 2.2.24 (a82c823)
> >> 
> >> 
> >> 
> >> 
> >> 
> >> Cheers,
> >> Jean-Luc
> >> 
> >> 
> >> 
> >> 
> >> 
> >> PS: "replication_sync_timeout = 2s" doesn't work, I had to drop the 
> >> 's'
> >> 
> >> 
> >> 
> >> 
> >> 
> >> On 2016-08-28 17:43, Jean-Luc Wasmer wrote:
> >>> 
> >>> 
> >>> Hi,
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> I’m having a hard time with the http://wiki2.dovecot.org/Replication
> >>>  page.
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> - for a master-master setup, does the configuration need to be
> >>> mirrored on both masters?
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> - after aggregating unrelated sections of the wiki page, there seems
> >>> to be 3 different values for “mail_replica":
> >>> - "remote”: for SSH
> >>> - “remoteprefix": for SSH wrapper
> >>> - “tcp”: for TCP connection using the Doveadm protocol
> >>> Is this correct?
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> - what’s the purpose of the replicator VS aggregator VS doveadm 
> >>> services?
> >>> Who talks to who? Where can I find documentation about their
> >>> configuration (i.e. not examples)
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> - most examples are for a single vmail user setup… what should be 
> >>> done
> >>> when using system accounts?
> >>> 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> Thanks,
> >>> Jean-Luc
> >>>