Just a prcision... maybe I misunderstood point

I saw in different posts, that an RSYNC may corrupt the database and cause trouble... therefore, we need a replication system.

1. I have  2 different servers, running (email server with dovecot) .. Server 1 and Server 2 ( backup system) . if they are running together in parallel, I need a replication in order NOT to corrupt files... correct ? RSYNC MY corrupt files..

2. now I have  only _one system_ ( in fact a VM with sendmail and dovceot )  and I want to backup every 20min, the emails.. normally a simple RSYNC of the email folder should be enough ? even without stopping Dovecot service.. just on the fly ...correct ? ?

Then, in case of crash.. I can reinstall my VM and mount the new NFS folder... that should be OK ?

What do you think ?

Thanks...

On 3/27/22 08:12, Stephane Magnier wrote:

Hi,

I am trying using a replication. Here is my config : 10-mail.conf. Before going " on real life " I try to make a very basic example... but without any success :-(   bad start

I took the config example on dovecot wiki

The idea is to replicate the user: "user1" on a different server IP 177.28.1.120 at the location /home/SERVER/test and to get at the end the folder "/home/SERVER/test/user1"

On the top, I wish to replication with the user / group : vmail. For the transfer, I use the root login on the backup server to avoid other rights problems at the moment

2. how to synchronized  specific users ? apparently it's trying to sync other things.. :-)

   # mbox_very_dirty_syncs = yes mail_plugins=$mail_plugins quota notify replication service replicator { process_min_avail = 1 }

   dsync_remote_cmd = ssh -l root 177.28.1.120 doveadm dsync-server -u user1 plugin { mail_replica =remote:root@177.28.1.120:/home/SERVER/test/ }

   service aggregator { fifo_listener replication-notify-fifo { user = vmail } unix_listener replication-notify { user = vmail } }

   service replicator { unix_listener replicator-doveadm { mode = 0600 user = vmail } }

   replication_max_conns = 10

But apparently nothing is happening....

[root@xxx xenia]# doveadm replicator status
Queued 'sync' requests 0
Queued 'high' requests 0
Queued 'low' requests 0
Queued 'failed' requests 0
Queued 'full resync' requests 24
Waiting 'failed' requests 10
Total number of known users   34

and the folder test is empty

Any idea what is wrong ? maybe I should ask a start a cmd line to start the process ? (

[root@mbox1 xenia]# doveadm replicator status '*'
username priority fast sync full sync success sync failed
rngd none     -         -         -            -
*user1                                                   none
00:00:04  00:40:05  -            y        ( failed )*
saslauth none     -         -         -            -
sa-milt none     -         -         -            -