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@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

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@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@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