dovecot - Jul 2018 - Replication problems

Hey

I am trying to setup a dovecot cluster with 2 servers using replication /dsync.

In front of it I got a Fortinet ADC (Load balance) and I think that I messing up
the dsync.
I see mails duplicated in the sync progress.

If I disable one of the servers in the ADC, it seems to work and the sync if
working without a problem.
But if I use both servers with a round robin on the ADC, I see mailed
duplicated.
Ex. I sent 100 mails thru the SMTP (Postfix) and 107 mails is in both servers,
but as said before, if I disable one of the servers in the ADC, I see the
correct amount of mails in both dovecot servers.

In the header of the duplicated mails I see the exact same postfix id and LMTP
id from dovecot.

Also I cant seem to get any log from the sync progress.

Med venlig hilsen
Thomas Kristensen
[MM_mail_logo_3_AS]
Storhaven 12 - 7100 Vejle
Tlf: 75 72 54 99 - Fax: 75 72 65 33
E-mail: tk at multimed.dk<mailto:tk at multimed.dk>


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Hello Thomas,

which version of dovecot do you use?

I'm running a dovecot cluster with 2 servers and dsync replication with ssh
(no loadbalancer but active/active with same priority dns mx records).
dsync replicates some emails back after they have been deleted on one node. For
me this started after 2.2.33.2. No solution yet.
If you're using a 2.2 version you could try 2.2.33.2.

Best regards,
Gerald

> Am 19.07.2018 um 14:13 schrieb Thomas Kristensen <TK at multimed.dk>:
> 
> Hey 
>  
> I am trying to setup a dovecot cluster with 2 servers using replication
/dsync.
>  
> In front of it I got a Fortinet ADC (Load balance) and I think that I
messing up the dsync.
> I see mails duplicated in the sync progress.
>  
> If I disable one of the servers in the ADC, it seems to work and the sync
if working without a problem.
> But if I use both servers with a round robin on the ADC, I see mailed
duplicated.
> Ex. I sent 100 mails thru the SMTP (Postfix) and 107 mails is in both
servers, but as said before, if I disable one of the servers in the ADC, I see
the correct amount of mails in both dovecot servers.
>  
> In the header of the duplicated mails I see the exact same postfix id and
LMTP id from dovecot.
>  
> Also I cant seem to get any log from the sync progress.
>  
> Med venlig hilsen
> Thomas Kristensen
> <image001.gif>
> Storhaven 12 - 7100 Vejle
> Tlf: 75 72 54 99 - Fax: 75 72 65 33
> E-mail: tk at multimed.dk
>  
> Denne e-mail kan indeholde fortrolig information. Hvis du ikke er den rette
modtager af denne e-mail eller hvis du modtager den ved en fejltagelse, beder vi
dig venligst informere afsender om fejlen ved at bruge svarfunktionen. Samtidig
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>