Le 21/05/2025 à 5:35 AM, Anton Shevtsov ([email protected]) a écrit :
Hi
Hi,
How can I scale SOGO?
As an example.
I have 1 server (sogo+apache) + 1 db server (postgresql)
> Sooner or later, when the load increases, I will have to scale the mail
system.
How can I do this? Does SOGO support any clustering option? How can I
add more resources (instances)?
Or, as an option, make several www/sogo servers and put a balancer in
front of them (keepalived/haproxy)?
Yes, here we use 4 sogo instances, each with a local dovecot "director"
using our dovecot backends.
The database is mariadb/galera cluster here.
You need a reverse-proxy/load-balancer with sticky sessions (here
nginx), you also need a common memcache (kind of SPOF since it's not
easy to replicate, but only for cache data).
Each sogo "node" includes:
- nginx
- sogod
- dovecot director for imap and submission (redirects user's IMAP
session to their sticky dovecot backend)
- haproxy for database access AND memcache access
Each sogo "proxy" includes:
- memcached (only one is used in normal conditions, the other is a
kind of failover)
- nginx as a reverse-proxy with an additional cookie to make sessions
"sticky"
Mount mail folders (maildir) from a remote server (nfs/isci/gluster/
ceph/...) What other options?
Here the mail system is distinct from sogo, but we use NFS to share
maildirs to dovecot backends.
Hope this helps,
Geoffroy
