[Dovecot] director with multiple instances

[Will Yardley]

I'm experiencing some problems similar to those described in 
http://dovecot.org/list/dovecot/2012-July/137250.html
except with 2.0.9.
Adding http://dovecot.org/list/dovecot/2012-July/084906.html 
to the main config didn't seem to help, nor did setting the list of
director and backend servers to just the system itself.


I get a banner connecting to port 143:
[root at retr01 log]# telnet localhost 143
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK Waiting for authentication process to respond..

Log messages are:

Jun  3 16:22:03 retr01 dovecot: pop3-login: Error: Timeout waiting for handshake from auth server. my pid=32152, input bytes=0
Jun  3 16:22:33 retr01 dovecot: pop3-login: Error: Timeout waiting for handshake from auth server. my pid=32152, input bytes=0
Jun  3 16:22:33 retr01 dovecot: director: Fatal: No inet_listeners defined for director service (for standalone keep director_servers empty)
Jun  3 16:22:33 retr01 dovecot: master: Error: service(director): command startup failed, throttling
Jun  3 16:23:08 retr01 dovecot: pop3-login: Error: Timeout waiting for handshake from auth server. my pid=32152, input bytes=0
Jun  3 16:23:33 retr01 dovecot: pop3-login: Disconnected: Inactivity (no auth attempts): rip=127.0.0.1, lip=127.0.0.1, secured

running dovecot procs are:
root     32137     1  0 16:20 ?        00:00:00 /usr/sbin/dovecot -c /etc/dovecot-main.conf
root     32145     1  0 16:20 ?        00:00:00 /usr/sbin/dovecot -c /etc/dovecot-director.conf

doveconf -n for the two configs (dovecot-main.conf,
dovecot-director.conf) are included below.

dovecot-sql.conf has:

driver = sqlite
connect = /etc/dovecot/empty.db

password_query = select 'y' as proxy, \
NULL as password, \
'y' as nopassword, \
case '%a' \
when '110' then '10110' \
when '995' then '10110' \
when '143' then '10143' \
when '993' then '10143' end \
as port;
(where empty.db is completely empty; this is just used since there's no
other way to handle the port mapping, as described elsewhere on the
list).

A static proxy setup does work, with the normal imap / pop3 listeners.

# 2.0.9: /etc/dovecot-main.conf
# OS: Linux 2.6.32-431.11.2.el6.x86_64 x86_64 Red Hat Enterprise Linux Server release 6.5 (Santiago) ext4
auth_username_format = %Ln
auth_worker_max_count = 60
base_dir = /var/run/dovecot-main
default_client_limit = 4096
default_process_limit = 200
dotlock_use_excl = yes
mail_fsync = always
mail_location = maildir:/var/spool/maildir/%1Ln/%Ln:INDEX=/mnt/post/cache/%1Ln/%Ln
mail_plugins = fts fts_squat quota
maildir_very_dirty_syncs = yes
mbox_write_locks = fcntl
mmap_disable = yes
namespace {
  inbox = yes
  location = 
  prefix = Mail.
  separator = .
  type = private
}
passdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
plugin {
  quota = maildir:User Quota
  quota_rule = *:storage=40960M:messages=3000000
}
service auth-worker {
  user = $default_internal_user
}
service imap-login {
  inet_listener imap {
    port = 10143
  }
  inet_listener imaps {
    port = 10993
  }
  service_count = 0
  vsz_limit = 128 M
}
service pop3-login {
  inet_listener pop3 {
    port = 10110
  }
  inet_listener pop3s {
    port = 10995
  }
}
ssl = required
ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
ssl_cipher_list = HIGH:MEDIUM:+TLSv1:!SSLv2:+SSLv3
ssl_key = </etc/pki/dovecot/private/dovecot.pem
syslog_facility = local4
userdb {
  args = uid=vmail gid=mail home=/var/spool/maildir/%1Ln/%Ln
  driver = static
}
protocol imap {
  mail_max_userip_connections = 24
  mail_plugins = fts fts_squat quota imap_quota
}
protocol pop3 {
  mail_max_userip_connections = 3
  pop3_uidl_format = %f
}

# 2.0.9: /etc/dovecot-director.conf
# OS: Linux 2.6.32-431.11.2.el6.x86_64 x86_64 Red Hat Enterprise Linux Server release 6.5 (Santiago) ext4
auth_username_format = %Ln
auth_worker_max_count = 60
base_dir = /var/run/dovecot-director
default_client_limit = 4096
default_process_limit = 200
director_doveadm_port = 2888
director_mail_servers = 192.168.1.71 192.168.1.72 192.168.1.73
director_servers = 192.168.1.71 192.168.1.72 192.168.1.73
dotlock_use_excl = yes
mail_fsync = always
mail_location = maildir:/var/spool/maildir/%1Ln/%Ln:INDEX=/mnt/post/cache/%1Ln/%Ln
mail_nfs_index = yes
mail_nfs_storage = yes
mail_plugins = fts fts_squat quota
maildir_very_dirty_syncs = yes
mbox_write_locks = fcntl
mmap_disable = yes
namespace {
  inbox = yes
  location = 
  prefix = Mail.
  separator = .
  type = private
}
passdb {
  args = /etc/dovecot/dovecot-sql.conf
  driver = sql
}
service auth-worker {
  user = $default_internal_user
}
service director {
  fifo_listener login/proxy-notify {
    mode = 0666
  }
  inet_listener {
    port = 2888
  }
  unix_listener director-userdb {
    mode = 0600
  }
  unix_listener login/director {
    mode = 0666
  }
}
service imap-login {
  executable = imap-login director
}
service pop3-login {
  executable = pop3-login director
}
ssl = required
ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
ssl_cipher_list = HIGH:MEDIUM:+TLSv1:!SSLv2:+SSLv3
ssl_key = </etc/pki/dovecot/private/dovecot.pem
syslog_facility = local4

w