[Dovecot] trouble setting up director, "invalid argument" for connect() call

[Jim Lawson]

Hi Timo & everyone,

I'm trying out a 2-node director setup, but I keep getting the following
error:

Oct  3 16:11:29 imapdir1 dovecot: master: Dovecot v2.0.15 starting up
(core dumps disabled)
Oct  3 16:11:34 imapdir1 dovecot: director: Error:
connect(132.198.100.150:9090) failed: Invalid argument
Oct  3 16:11:41 imapdir1 last message repeated 3 times

Both nodes report this error.  The director on each node is listening on
port 9090 just fine:

> [root at imapdir1 ~]# nc imapdir2 9090
> VERSION director        1       0
> ME      127.0.0.1       9090

> [root at imapdir2 ~]# nc imapdir1 9090
> VERSION director        1       0
> ME      127.0.0.1       9090

"doveadm director ring status" always reports failure of the peer:


> [root at imapdir1 ~]# doveadm director ring status
> director ip                                    port type last
> failed        
> 127.0.0.1                                      9090 self
> never              
> 132.198.100.150                                9090      2011-10-04
> 13:28:55


> [root at imapdir2 ~]# doveadm director ring status
> director ip                                    port type last
> failed        
> 127.0.0.1                                      9090 self
> never              
> 132.198.100.149                                9090      2011-10-04
> 13:24:08


Has anyone else seen this?

FWIW, a single-node director works fine, proxying IMAP, LMTP and POP. 

I'm guessing I have a broken config, but if I do I can't figure it out. 
Hope I'm not missing something *too* obvious...

Here's doveconf -n from imapdir1:

 # 2.0.15: /etc/dovecot/dovecot.conf
 # OS: Linux 2.6.18-274.3.1.el5 x86_64 Red Hat Enterprise Linux Server
release 5.7 (Tikanga)
 base_dir = /var/run/dovecot/
 director_mail_servers = penguina.uvm.edu penguinb.uvm.edu penguinc.uvm.edu
 director_servers = imapdir1.uvm.edu imapdir2.uvm.edu
 lmtp_proxy = yes
 login_trusted_networks =
132.198.101.211,132.198.101.212,132.198.101.213,132.198.101.214,132.198.101.215,132.198.101.216,132.198.100.45,132.198.100.46,132.198.100.47
 passdb {
   args = proxy=y nopassword=y protocol=smtp
   driver = static
 }
 service auth {
   unix_listener auth-userdb {
     group = mail
     mode = 0660
     user = dovecot
   }
 }
 service director {
   fifo_listener login/proxy-notify {
     mode = 0666
   }
   inet_listener {
     port = 9090
   }
   unix_listener director-userdb {
     mode = 0600
   }
   unix_listener login/director {
     mode = 0666
   }
 }
 service imap-login {
   executable = imap-login director
 }
 service lmtp {
   client_limit = 1
   inet_listener lmtp {
     port = 24
   }
   unix_listener /var/lib/dovecot/lmtp-socket {
     group = root
     mode = 0600
     user = root
   }
 }

Best,
Jim