dovecot - Jan 2014 - inotify max_user instances

Hello,

Timo, last year when you remoted into our server and performed the 
migration from courier-imap, we ran into this issue, and you solved it 
by doing:

echo 1024 > /proc/sys/fs/inotify/max_user_instances

Then you said you were going to solve this permanently by changing the 
init script...

Here is what you said (this is from the skype chat):

[2012-06-04 10:40:43 AM] timosirainen: probably put to dovecot init 
script or something

I guess I could manually modify my init script, but I'm clueless as to 
where.how.

The current (gentoo) init script is:
> #!/sbin/runscript
> # Copyright 1999-2012 Gentoo Foundation
> # Distributed under the terms of the GNU General Public License, v2 or 
> later
> # $Header: 
> /var/cvsroot/gentoo-x86/net-mail/dovecot/files/dovecot.init-r4,v 1.1 
> 2012/12/01 10:40:49 eras Exp $
>
> extra_started_commands="reload"
>
> depend() {
>         need localmount
>         before postfix
>         after bootmisc ldap mysql ntp-client ntpd postgresql saslauthd 
> slapd
>         use logger net
> }
>
> checkconfig() {
>         DOVECOT_INSTANCE=${SVCNAME##*.}
>         if [ -n "${DOVECOT_INSTANCE}" -a "${SVCNAME}"
!= "dovecot" ]; then
> DOVECOT_CONF=/etc/dovecot/dovecot.${DOVECOT_INSTANCE}.conf
>         else
>                 DOVECOT_CONF=/etc/dovecot/dovecot.conf
>         fi
>         if [ ! -e ${DOVECOT_CONF} ]; then
>                 eerror "You will need an ${DOVECOT_CONF} first"
>                 return 1
>         fi
>         if [ -x /usr/sbin/dovecot ]; then
>                 DOVECOT_BASEDIR=$(/usr/sbin/dovecot -c ${DOVECOT_CONF} 
> -a | grep '^base_dir = ' | sed 's/^base_dir = //')
>         else
>                 eerror "dovecot not executable"
>                 return 1
>         fi
>         DOVECOT_BASEDIR=${DOVECOT_BASEDIR:-/var/run/dovecot}
>         DOVECOT_PIDFILE=${DOVECOT_BASEDIR}/master.pid
> }
>
> start() {
>         checkconfig || return 1
>         ebegin "Starting ${SVCNAME}"
>         start-stop-daemon --start --exec /usr/sbin/dovecot \
>                 --pidfile "${DOVECOT_PIDFILE}" -- -c
"${DOVECOT_CONF}"
>         eend $?
> }
>
> stop() {
>         checkconfig || return 1
>         ebegin "Stopping ${SVCNAME}"
>         start-stop-daemon --stop --exec /usr/sbin/dovecot \
>                 --pidfile "${DOVECOT_PIDFILE}"
>         eend $?
> }
>
> reload() {
>         checkconfig || return 1
>         ebegin "Reloading ${SVCNAME} configs and restarting auth/login
> processes"
>         start-stop-daemon --signal HUP --exec /usr/sbin/dovecot \
>                 --pidfile "${DOVECOT_PIDFILE}"
>         eend $?
> }
Suggestions?

-- 

Best regards,

Charles

On 2014-01-06 1:33 PM, Charles Marcus <CMarcus at Media-Brokers.com>
wrote:
> Timo, last year when you remoted into our server and performed the 
> migration from courier-imap, we ran into this issue, and you solved it 
> by doing:
>
> echo 1024 > /proc/sys/fs/inotify/max_user_instances
>
> Then you said you were going to solve this permanently by changing the 
> init script...
>
> Here is what you said (this is from the skype chat):
>
> [2012-06-04 10:40:43 AM] timosirainen: probably put to dovecot init 
> script or something
Actually found this a but later during the chat, which looks much 
better. I guess when you said 'it looks up a good value from doveconf', 
that one could specify the value in the config file and it would use 
whatever was there?

Anyway, here is what you said (to refresh your memory):
> timosirainen: i can do that. btw i've today been building RPMs for
dovecot
> timosirainen: and in that init.d script i'm also adding this
> timosirainen: i'll make it somewhat automatic though
> timosirainen:  if [ "$INOTIFY_INSTANCES" != "" ]; then
>    if [ "$INOTIFY_INSTANCES" = "auto" ]; then
>      INOTIFY_INSTANCES=`$doveadm config -h service/imap/process_limit`
>      if [ "$INOTIFY_INSTANCES" = 0 ]; then
>        INOTIFY_INSTANCES=`$doveadm config -h default_process_limit`
>      fi
>      increase_proc_value /proc/sys/fs/inotify/max_user_watches 
> $INOTIFY_INSTANCES
>      increase_proc_value /proc/sys/fs/inotify/max_user_instances 
> $INOTIFY_INSTANCES
>    fi
>  fi
> timosirainen: it looks up a good value from doveconf

Charles Marcus skrev den 2014-01-06 19:33:
> echo 1024 > /proc/sys/fs/inotify/max_user_instances
> Suggestions?
add this to sysctl.conf

no need to hack init scripts :)