director service tries to start without any configuration

[Eirik Rye]

Hello,

- Dovecot 2.3.18 (originally Dovecot 2.3.16, but upgraded in an
attempt to fix issue)
- Ubuntu 20.04 using Dovecot repo

In my organization have run a cluster of dovecot proxy machines, with
the director service enabled in a transition period as we have
migrated all our users to do direct proxying to backend (e.g.
`proxy=y, host=192.168.0.2`), bypassing the director service.

Now that all users have been migrated, it is time to disable the
director service. However, even after removing all director
configuration ("doveconf -n | grep director" returns nothing) and
restarting the entire dovecot service (not just "doveadm reload"), the
error log still spits out these errors:

2022-04-29T11:27:25+0200 director: Error: Empty server list
2022-04-29T11:27:25+0200 director: Fatal: Invalid value for
director_mail_servers setting
2022-04-29T11:27:25+0200 master: Error: service(director): command
startup failed, throttling for 60.000 secs

Why is this happening? It's not critical, and logins work fine without
the director service running, but I'm trying to figure out why and
stop the log noise.

doveconf stuff:

root at director03:~# doveconf -n | grep director
# Hostname: director03

root at director03:~# doveconf -n
# 2.3.18 (9dd8408c18): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.18 (0bc28b32)
# OS: Linux 5.4.0-88-generic x86_64 Ubuntu 20.04.4 LTS
# Hostname: director03
debug_log_path = /var/log/dovecot.log
default_vsz_limit = 768 M
disable_plaintext_auth = no
doveadm_password = # hidden, use -P to show it
doveadm_port = 24245
event_exporter log {
format = json
format_args = time-rfc3339
transport = log
}
imap_id_retain = yes
info_log_path = /var/log/dovecot.log
lmtp_add_received_header = no
lmtp_proxy = yes
log_path = /var/log/dovecot.err
log_timestamp = "%FT%T%z "
login_greeting = %{hostname} ready.
login_log_format_elements = user=<%u> orig=<%{orig_user}> method=%m
proto=%s rip=%r lip=%l session=<%{session}> %c %k
login_proxy_max_disconnect_delay = 10 secs
login_trusted_networks = <redacted>
mail_plugins = quota
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope
encoded-character vacation subaddress comparator-i;ascii-numeric
relational regex imap4flags copy include variables body enotify
environment mailbox date index ihave duplicate mime foreverypart
extracttext
metric auth_passdb_request_finished {
filter = event=auth_passdb_request_finished AND category=service:auth
group_by = service passdb_name result
}
passdb {
args = /etc/dovecot/dovecot-redis.conf.ext
auth_verbose = yes
driver = dict
name = redis
override_fields = proxy=y
}
protocols = imap pop3 lmtp sieve
service doveadm {
inet_listener http {
port = 8080
}
}
service imap-login {
client_limit = 2048
executable = imap-login
inet_listener imap {
address =
port = 143
}
inet_listener imaps {
address =
port = 993
ssl = yes
}
process_limit = 32
process_min_avail = 16
service_count = 0
vsz_limit = 1 G
}
service lmtp {
inet_listener lmtp {
port = 24
}
}
service managesieve-login {
client_limit = 1024
executable = managesieve-login
inet_listener sieve {
address =
port = 4190
}
process_limit = 2
process_min_avail = 1
service_count = 0
vsz_limit = 1 G
}
service pop3-login {
client_limit = 2048
executable = pop3-login
inet_listener pop3 {
address =
port = 110
}
inet_listener pop3s {
address =
port = 995
ssl = yes
}
process_limit = 4
process_min_avail = 2
service_count = 0
vsz_limit = 1 G
}
service stats {
client_limit = 65536
inet_listener http {
port = 9900
}
}
ssl_cert = </etc/dovecot/wildcard.crt
ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
ssl_min_protocol = TLSv1
verbose_proctitle = yes
protocol imap {
mail_max_userip_connections = 25
}
protocol pop {
mail_max_userip_connections = 25
}
local 127.0.0.0/8 {
doveadm_password = # hidden, use -P to show it
}