Re: Trouble with replication via IMAP

Hi,

Same thing here, I never managed to make cyrus use imap for replication.
With or without sync_try_imap.
It always fall back to csync, after the imap test.
Debian packages, 2.5 to 3.2, 3.2 to 3.2 and now 3.2 to 3.6.

Authentification, then :
    41 35.032441693 10.0.132.183 → 10.0.132.74  IMAP 163 Response: A01  
OK Success (privacy protection)  
SESSIONID=<cyrus-1681887621-1382319-1-14400537638870657483>
    42 35.032647887 10.0.132.183 → 10.0.132.74  TCP 66 143 → 44064  
[FIN, ACK] Seq=624 Ack=894 Win=64512 Len=0 TSval=1651866450  
TSecr=690413991
    43 35.032834724  10.0.132.74 → 10.0.132.183 TCP 60 44064 → 143  
[RST] Seq=894 Win=0 Len=0
    44 35.032935275  10.0.132.74 → 10.0.132.183 TCP 60 44064 → 143  
[RST] Seq=894 Win=0 Len=0
    45 35.033531056  10.0.132.74 → 10.0.132.183 TCP 74 44736 → 2005  
[SYN] Seq=0 Win=64240 Len=0 MSS=1460 SACK_PERM=1 TSval=690413992 TSec

Imap works fine between both hosts :
# cyradm -user cyrus 10.0.132.74
Password:
10.0.132.74>


Quoting ellie timoney <[email protected]>:

> Hi Nels,
>
> Did you somehow turn off "sync_try_imap" (in imapd.conf on the  
> primary)?  It should be on by default unless it's configured to be  
> off.  If it's on (by default or otherwise), sync_client will always  
> try to make an IMAP connection to the replica before falling back to  
> CSYNC if that fails.  If it's off, it will only try CSYNC, which  
> requires sync_server to be running on the replica.  It sounds like  
> your sync_client is only trying CSYNC, which makes me think  
> "sync_try_imap" is turned off.
>
> Here's the relevant paragraph from the imapd.conf(5) man page:
>
>>           sync_try_imap: 1
>>               Whether sync_client should try to perform an IMAP  
>> connection before fall‐
>>               ing back to csync.  If this is set to "no",   
>> sync_client  will  only  use
>>               csync.  Prefix with a channel name to apply only for  
>> that channel
>
> Cheers,
>
> ellie
>
> On Tue, 18 Apr 2023, at 6:18 AM, Nels Lindquist wrote:
>> Good afternoon.
>>
>> I'm configuring replication between two 3.6.1 instances.
>>
>> Based on the example configuration files provided, I started with
>> sync_server disabled in cyrus.conf on the replica, since IMAP
>> replication has been supported since version 3.
>>
>> However, I kept getting "sync_client connect(repl1.dom.ain) failed:
>> Connection refused" errors. No firewall issues; direct connections to
>> IMAP ports all work fine.  Running sync_client manually from the
>> commandline also fails with a connection timeout.
>>
>> I configured sync_server in cyrus.conf on the replica and everything
>> immediately began replicating. FWIW, I've tried with and without log
>> channels. Both work fine as long as sync_server is running; neither work
>> without it.
>>
>> Any ideas?
>>
>> Nels Lindquist
>> ----
>> <[email protected]>
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