High availability of Dovecot

[Aki Tuomi]

On 11.4.2019 11.44, luckydog xf via dovecot wrote:
> Hi, list,
>
>      I'm going to deploy postfix + dovecot + CephFS( as Mail Storage).
> Basically I want to use two servers for them, which  is kind of HA.
>  
>     My idea is that using keepalived or Pacemaker to host a VIP, which
> could fail over the other server once one is down. And I'll use
> Haproxy or Nginx to schedule connections to one of those server based
> on source IP( Session stickiness),  I'll use VIP as DNS record.etc, is
> my plan doable?
>
>    I know MX could be server ones with different priority. But I think
> it brings along shortage that DNS couldn't know Email server is up or
> down, it just returns results to MUA, right?
>
>    Thanks for any suggestions and ideas. 
>
>     -

You could use dovecot configured as director in the front, it would
assign users to backends and maintain that to avoid accessing same users
on two backends.

Aki