dovecot proxy/director and high availability design

[Marcus Rueckert]

On Tue, 21 Jul 2015 12:00:39 -0700
James Lott <james at lottspot.com> wrote:

> I think RR DNS is the only viable solution under these circumstances.
> If you can cope with the fact that failovers won't be seamless, I
> don't think there's anything wrong with that though.
> 
> On 07/21/2015 11:54 AM, Laz C. Peterson wrote:
> > The consensus seems to say no to RR DNS … I am going to take that
> > into serious consideration.
> >
> > With this proxy setup you describe, what would happen if HAProxy or
> > Dovecot Proxy were to fail?
> >
> > I think there is no problem with many moving parts, as long as
> > there is a backup plan in case something goes awry.  My goal is
> > slightly different, as I want to have HA available across
> > datacenters without using BGP or having control over the IP space
> > (so, no anycast).  Just a simple way to get the clients redirected
> > to the other Dovecot server when I lose an entire datacenter
> > network for whatever reason.

you dont need DNS RR for that. just plain DNS entries with a very short
TTL.

    darix

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