On 2022-10-21 06:19, Zhang Huangbin wrote:
On Oct 21, 2022, at 4:19 AM, Antonio Leding <t...@leding.net> wrote:
My understanding is that Director is targeted toward large enterprise
mail installations that will incorporate several servers for a given
function. In such an environment, Director would be the
fore-person\traffic-cop keeping things organized & squared-away.
Director is used when you setup frontend servers in a load-balance
cluster, proxy imap/pop3/lmtp/managesieve requests to backend Dovecot
servers.
I setup load-balance cluster for clients with HAProxy + KeepAlived +
Dovecot Director running in frontend servers, so sad we have to find an
alternative to replace Director in such case.
It's not about "small/medium" servers, but the demand of imap/pop3/lmtp
proxy service, especially in load-balance cluster.
----
Zhang Huangbin, founder of:
- iRedMail: Open source email server solution:
https://www.iredmail.org/
- Spider: Lightweight, on-premises Email Archiving Software:
https://spiderd.io
Hi,
I was wondering if one can achieve the same implementation with haproxy
without dovecot director? Load balancing all requests to pop3, imap,
managesieve and lmtp services from specified frontend servers i.e.
webmail to specified backend servers and using NFS mount
filesystem/syncing data across all servers to access emails with high
availability?
Not sure whats the big deal director is offering? Is it just a native
functionality providing a feature to find which backend server have X
emails available and chooses to load from e.g. its content i.e. like
checks which first server that doesnt return http 404 response
equivalent in IMAP/POP3/LMTP/ManageSieve?
Sometime ago I used Varnish caching directors to implement high
availability using 404 response status in http web server, and it seems
great if we can have this feature in dovecot too, as it offers high
availability with delayed-syncing/partial-syncing across unknown
selected servers, I managed to use Varnish too in dovecot proxy service
i.e. the webmail, yet it requires NFS mount or high available file
system all servers can have through immediate access to e.g. maildir?
Any helpful input that would clear the picture for me in regards dovecot
director, would be ver much appreciated.
With thanks.
Zakaria.
