Initial Replication

[David Morsberger]

Thanks Ross! Your instructions worked like a charm. 

I’ve been monitoring both sides for days and everything looks great. 

Sent from my iPhone

> On Dec 29, 2020, at 15:30, Marc Roos <M.Roos at f1-outsourcing.eu> wrote:
> 
> 
> 
> Hi David, 
> 
> Afaik you have to put the 'old' emails before replicating on both, 
> because replicating only works on new arriving.
> 
> I just migrated to a server on a different platform keeping same os and 
> dovecot version. One namespace had mbox storage which on the new server 
> became mdbox.
> 
> For the mbox -> mdbox namespace I used this
> 
> doveadm backup -f -n inbox -F /root/backup-accounts.txt 
> tcp:mailXX.local:542
> 
> Test first with one account, depending on the permissions of the 
> directories on the destination, dovecot will create all the files.
> 
> I had a 2nd namespace that I needed to migrate that was already in 
> mdbox. I decided the rsync that, because here it was 2 days vs 5 hours 
> syncing.
> 
> After the rsync I did again the backup on that namespace
> 
> doveadm backup -f -n Archive -F /root/backup-accounts.txt 
> tcp:mailXX.local:542
> 
> Then I ran a script counting messages in mailboxes of all users on both 
> servers and a diff showed that everything was ok.
> 
> I guess if you handle it like this you will not loose a message. ;)
> 
> 
> 
> 
> -----Original Message-----
> From: David Morsberger [mailto:david at mmpcrofton.com] 
> Sent: 29 December 2020 20:09
> To: dovecot mailing list
> Subject: Initial Replication
> 
> I searched the archives and do not see a question/answer for this. 
> 
> Should I perform a set of ordered steps after setting up replication? I 
> have setup dovecot on both ends with identical config except for the 
> remote hostname. 
> 
> Main concern is the existing server gets replicated to the new server. I 
> want nothing from new server replicated to the old server. Risking 
> "Trial and error" and "crossing fingers doesnt work with production 
> emails
> 
> Specifically:
> 
> Do I need to setup the mail directories for the various virtual users on 
> the remote? If so, do the directories need to empty?
> 
> Should I initially do a manually one-way synch using doveadm from the 
> existing server? If so, is there a way of turning off automatic 
> replication while the manual one runs?
> 
> Anything else?
> 
> T
> 
> David 
>