Question about noreplicate flag

[Aki Tuomi]

On 17.2.2020 13.09, Bernardo Reino wrote:
> On Mon, 17 Feb 2020, Bernardo Reino wrote:
>
>> On Mon, 17 Feb 2020, Aki Tuomi wrote:
>>
>>> On 17.2.2020 12.48, Bernardo Reino wrote:
>>>> Dear all,
>>>>
>>>> I've just setup replication between two servers. The e-mail accounts
>>>> on both servers intersect but are not the same.
>>>>
>>>> In dovecot.conf (both are identical except one user /var/mail and the
>>>> other uses /srv/vmail) I have:
>>>>
>>>> --<<--
>>>> userdb {
>>>>   driver = passwd-file
>>>>   args = username_format=%Lu /etc/dovecot/virtual_passwd
>>>>   default_fields = uid=vmail gid=vmail home=/var/mail/%d/%n
>>>> }
>>>>
>>>> passdb {
>>>>   driver = passwd-file
>>>>   args = scheme=SHA512-CRYPT username_format=%Lu
>>>> /etc/dovecot/virtual_passwd
>>>> }
>>>> -->>--
>>>>
>>>> i.e. I use a passwd-like database.
>>>>
>>>> For the non-overlapping accounts in both servers I want to prevent
>>>> replication, as it will otherwise fail with "Error: sync: Unknown user
>>>> in remote".
>>>>
>>>> I have added "userdb_noreplicate" (also tried "userdb_noreplicate=y")
>>>> for those users, but I still see the above error message in the logs.
>>>>
>>>> Like:
>>>> reinob at bbmk.org:{SHA512-CRYPT}$6$e10...4c::::::userdb_noreplicate=y
>>>>
>>>> If I run "doveadm user -u reinob at bbmk.org" I get the following:
>>>>
>>>> userdb: reinob at bbmk.org
>>>>   user      : reinob at bbmk.org
>>>>   uid       : 5000
>>>>   gid       : 5000
>>>>   home      : /var/mail/bbmk.org/reinob
>>>>   noreplicate: y
>>>>
>>>> Note that I use "userdb_noreplicate" instead of "noreplicate" (which I
>>>> also tried just in case), as from what I understood the "userdb_"
>>>> prefix is required when adding the flag to the passwd file.
>>>>
>>>> As far as I can tell I'm doing everything right, but for some reason
>>>> the replication is ignoring that flag.
>>>>
>>>> Thanks in advance for any help with this.
>>>>
>>>> (Let me know if you need to see the $(doveconf -n), but I believe the
>>>> only relevant parts are the userdb and passdb.
>>>
>>>
>>> Hi!
>>>
>>> What version of dovecot are you using? The noreplicate field seems
>>> to be
>>> correctly there. Can you turn on 'mail_debug=yes', and see if the
>>> replicator logs anything useful.
>>
>> It's 2.3.9.3 from repo.dovecot.org (debian buster) on both servers.
>>
>> I'll try to enable mail_debug and see what it tells me!
>>
>> Thanks a lot.
>
> Here's a log. I copied a message from one folder to another, which
> triggered the server (the one having reinob at bbmk.org with the
> noreplicate flag) to (attempt to) replicate to the other server not
> having this account.
>
> --<<--
<snip/>
> -->>--
>
> (The above is also attached as a plain text file, in case alpine does
> mess up the line wrapping..)
>
> Note that the log even says "Added userdb setting: plugin/noreplicate=y",
> yet the very next line is the remote having been contacted! :)
>
> Any ideas?
>
> Thanks a lot in advance,
> Bernardo.


I wonder if we are doing the noreplicate too late. Can you try adding
one of the non-overlapping users to the other site with noreplicate=y
and see if helps?

Aki