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 >>>>>> >>>>>> >>>>>> >>>>>> >>> >>> >>> -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
