Dsync config help

[Jean-Luc Wasmer]

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
>> 
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