Thanks all for your answers.
I have at last setup the NAS, and mails are received there.
So I will set the second server and second MTA, and both will receive
emails.
Next step is to give users access to both servers to retreive emails.
As a load-balancer could help easily for http/https access, how to deal
with IMAP ports? How to load-balance IMAP ports?
Thanks
Patrick
Le 29/01/2017 à 14:29, rightkicktech.gmail.com a écrit :
A shared storage with glusterfs seems a nice approach.
In this way, it doesn't matter which server receives the mail, as long
as the MDAs of each server write on the shared storage.
Alex
On January 25, 2017 6:08:59 PM EET, Patrick Domack
<patric...@patrickdk.com> wrote:
All options, assuming your imap/pop/lmtp are compatable and friendly using
it.
I know dovecot you should only access a mailstore from one host at a
time, don't just randomly balance things, or it can corrupt the index
files.
Quoting Eero Volotinen <eero.voloti...@iki.fi>:
how about mounting ceph or glusterfs disk to message store?
eero 25.1.2017 5.18 ap. "Patrick Domack"
<patric...@patrickdk.com> kirjoitti:
This would not be a good thing to do, as deleted email
will magically reappear. Using unison to sync it worked
for me, over 10years ago. But these days, just use dsync
part of dovecot, and your life will be happy. Quoting
Patrick Chemla <patrick.che...@perfaction.net>: Hi Wietse,
Of course I thought about such NAS solution, but I
wanted to check if there is a way with 2 separate
disks, with a kind of that could be aware of emails
files changes. Actually, the mail server run onto a
VM, on a big server. I have another big server with
same emails VM, and I just rsync --delete --update
from the first one to the second. So I have a full
image copy every 5 minutes, but only one real MTA. I
will check the NAS option, if there is no other way.
Thanks Patrick Le 24/01/2017 à 13:45, Wietse Venema a
écrit :
Patrick Chemla:
Hi, I have a running Fedora 24 emails server
using postfix 3.1.3, with courier. I wonder
how to build a pair of MTAs to secure emails
at all time, having 2 servers receiving the
emails, and users could connect to either
server to get emails, maybe on a load balanced
way. Problems are with synchronization when
receiving emails from outside, or emails read,
emails moved,....
You need a redundant message store. In pre-cloud
times, people would use a NAS filer with redundant
disks, store email as maildir files (one per
message) and MDAs would mount that store via NFS.
Perhaps that model still works for you. Does
someone have a good guide, howto, doc to achieve
this?
Thanks for help. Patrick
--
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