On 2013/10/20 17:48, Matthieu Herrb wrote:
> Hi,
>
> the default configuration of dovecot fails to start here with the
> default login.conf. I get lots of "Too many open files" errors.
>
> After applying the recipe in pkg-readmes/dovecot to setup a dovecot
> login class with a higher openfile-cur value, it does indeed
> start.
>
> Could it be possible to either provide a default dovecot config which
> opens less files (I see 160 open fd on the main dovecot process after
> startup, with no clients connected), or have the package setup the
> proper login class with a high enough openfile-cur value ?
>
> TIA
> --
> Matthieu Herrb
>
Hmm, the README isn't sufficiently strict, it says "On a busy server [...]"
so as a minimum we need to fix that (diff below).
We don't have any automated way to let packages add fragments to login.conf.
Forcing limits via the rc.d script could work, though we can't just use
a custom rc_start() that raises ulimit -n, it needs to add to what's
already set for the dovecot class rather than override it completely
so I think we'd need a separate script which raises the limit, and have
rc.d/dovecot call that script instead of /usr/local/bin/dovecot.
For your other suggestion of changing defaults in Dovecot, reducing
auth_worker_max_count helps a little, though it's still pretty tight,
we might just get it good enough for a single-user mailhost but it's
not going to be good enough for any serious use.
Index: Makefile
===================================================================
RCS file: /cvs/ports/mail/dovecot/Makefile,v
retrieving revision 1.213
diff -u -p -r1.213 Makefile
--- Makefile 27 Sep 2013 01:35:51 -0000 1.213
+++ Makefile 20 Oct 2013 19:12:52 -0000
@@ -10,6 +10,7 @@ COMMENT-postgresql= PostgreSQL authentic
# Bump dovecot-pigeonhole every time you update to a new Dovecot version.
V_MAJOR= 2.2
V_DOVECOT= 2.2.6
+REVISION-server=0
DISTNAME= dovecot-${V_DOVECOT}
PKGNAME= dovecot-${V_DOVECOT}
Index: pkg/README-server
===================================================================
RCS file: /cvs/ports/mail/dovecot/pkg/README-server,v
retrieving revision 1.1
diff -u -p -r1.1 README-server
--- pkg/README-server 1 Jul 2012 10:26:35 -0000 1.1
+++ pkg/README-server 20 Oct 2013 19:12:52 -0000
@@ -5,9 +5,9 @@ $OpenBSD: README-server,v 1.1 2012/07/01
+-----------------------------------------------------------------------
By default, the _dovecot user, and so the Dovecot processes run in
-the login(1) class of "daemon". On a busy server, it may be advisable
-to put the _dovecot user and processes in their own login(1) class
-with tuned resources, such as more open file descriptors etc.
+the login(1) class of "daemon". The default limits on file descriptors
+are insufficient to run Dovecot; instead you should put the _dovecot
+user and processes in their own login(1) class with tuned resources.
For example, add this to the login.conf(5) file:
