Trying Dovecot Replication with dsync

[Listas@Adminlinux]

I had no luck with distributed filesystems. Then I use DRBD + Ext4 and 
my cluster is a just failover cluster.

But I need to deliver load balancing now. So I want to replace the 
current design (with Drbd) for a cluster with Dovecot-Dsync (for 
replication) and Dovecot-Director (for user->backend mapping).

But I'm having problems yet. Like this:
dsync-server(account=domaintest.com):
Error: Couldn't create lock 
/var/lib/imap/account=domaintest.com/.dovecot-sync.lock: No such file or 
directory

Thanks!!
--
Thiago Henrique

Em 14-08-2014 16:28, Listas at Adminlinux escreveu:
> Hi,
>
> I have a failover cluster for mail server with:
> Ubuntu12.04 + DRBD (for block replication) + Ext4 filesystem
> + Dovecot-2.0.19-2 with Mdbox
>
> It works fine with ~50k accounts. My cluster design:
> http://adminlinux.com.br/cluster_design.txt
>
> I plan to test Dovecot Replication with dsync to build an active/active
> cluster with load balancing. Can anyone direct me to some literature? A
> tutorial for example.
>
> I'm installing a cluster (for tests) with Ubuntu 14.04 + Ext4 filesystem
> (without Drbd) + Dovecot-2.2.9-1ubuntu2.1. My conf is in:
> http://adminlinux.com.br/replication-doveconf.txt
>
> I'm following this doc http://wiki2.dovecot.org/Replication but I'm
> getting some errors:
>
> 1)
> Aug 14 15:39:34 ceph1 dovecot: imap(account=domaintest.com): Error:
> open(/var/run/dovecot/replication-notify-fifo) failed: Permission denied
>
> What is the correct perms for /var/run/dovecot/replication-notify-fifo ?
> Currently:
> # ll /var/run/dovecot/replication-notify-fifo
> prw------- 1 root root 0 Aug 14 15:57
> /var/run/dovecot/replication-notify-fifo|
>
> 2)
> Aug 14 16:02:34 ceph1 dovecot: dsync-server(account=domaintest.com):
> Error: Couldn't create lock
> /var/lib/imap/account=domaintest.com/.dovecot-sync.lock: No such file or
> directory
> Aug 14 16:02:34 ceph1 dovecot: dsync-local(account=domaintest.com):
> Error: Couldn't create lock
> /var/lib/imap/account=domaintest.com/.dovecot-sync.lock: No such file or
> directory
>
> In my production cluster, it is automatically created by dovecot when
> the user performs the first login:
> /var/lib/imap/<account> for INDEX
> /var/spool/imap/<account> for Mdbox
>
> Thanks!
> --
> Thiago Henrique