High Availability Dovecot / Roundcube / PostfixAdmin ?

[Adi Pircalabu]

On 09-07-2021 19:15, White, Daniel E. (GSFC-770.0)[NICS] wrote:
> This is a new setup, running on RHEL 8 with the latest everything.
> 
> Has anyone out there set up a high availability pair of Dovecot
> servers - with Roundcube and PostfixAdmin - successfully ?

Yes. NFS or GlusterFS for shared storage, Keepalived, Percona 
XtraDB+ProxySQL as database backend, Postfix, Dovecot, nginx as reverse 
proxy for Apache w. PHP-FPM. Suggest you start from the bottom up and 
*please* add monitoring for all services, look at Nagios/NRPE w. Percona 
monitoring plugins, more often than not a life saver. If things can go 
pear-shaped they will :)
Cheers,

-- 
Adi Pircalabu