Hello
I have a two-server dovecot setup using replication. Each server runs
two dovecot instances, one for director and another for the backend.
Initially I set up a single server, got it all working, then rsync'd the
data and index partitions to the new one and started the clusters (I
used rsync as a way to speed-up dovecot's initial replication). Both
servers listen on a virtual IP addresses load-balanced by IPVS as well
as their own IP addresses.
When I started dovecot in the second server, users started reporting
that some of their messages were missing. I noticed that while the mail
data seemed to be up to date in server1, it wasn't in server2; however,
the indexes were being updated in server2 but not in server1. For
example, "doveadm quota get -u some-user" would report the wrong value
in server1 and the right value in server2, while a "du" would show
that
only server1 actually had the most up-to-date data.
At the moment I had to take down server2, because as soon as dovecot is
running in it, users start reporting missing messages again. To solve
that problem, a "doveadm force-resync" in server1 isn't enough. I
either
rsync the index files from server2 or remove the indexes in server1
before the force-resync, which then works.
Has anyone ever saw anything similar to this? Any help would be much
appreciated.
I'm running Ubuntu 14.04 with dovecot 2.2.15 with the configurations below:
=== Backend instance ==
# dovecot -n
# 2.2.15: /etc/dovecot/dovecot.conf
# OS: Linux 3.16.0-37-generic x86_64 Ubuntu 14.04.2 LTS
auth_master_user_separator = *
auth_mechanisms = plain login
auth_username_chars
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@auth_worker_max_count
= 10
disable_plaintext_auth = no
doveadm_password = secret
doveadm_port = 12345
listen = server1.mydomain.com
mail_fsync = never
mail_gid = dovemail
mail_plugins = " notify replication quota"
mail_uid = dovemail
managesieve_sieve_capability = fileinto reject envelope vacation
subaddress comparator-i;ascii-numeric relational regex copy include
vacation-seconds imapflags notify
namespace {
inbox = yes
location mailbox SPAM {
auto = subscribe
}
prefix separator = /
type = private
}
passdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
passdb {
args = /etc/dovecot/dovecot-sql-master.conf.ext
driver = sql
master = yes
pass = yes
}
plugin {
mail_replica = tcp:192.168.0.2:12345 # server2's replication IP
quota = dict:User
quota::file:/var/lib/imap/user/%2.256RHn/%n/dovecot-quota
quota_rule = *:storage=1GB
sieve = /var/lib/imap/sieve/%2.256RHn/%n/dovecot.sieve
sieve_dir = /var/lib/imap/sieve/%2.256RHn/%n
sieve_extensions = comparator-i;ascii-numeric copy envelope fileinto
imapflags include notify regex reject relational subaddress vacation-seconds
sieve_max_redirects = 20
sieve_max_script_size = 512KB
sieve_quota_max_scripts = 2
sieve_vacation_min_period = 1
sieve_vacation_send_from_recipient = yes
}
protocols = imap pop3 lmtp sieve
replication_dsync_parameters = -f -d -N -l 30 -U
service aggregator {
fifo_listener replication-notify-fifo {
group = dovemail
mode = 0666
user = dovemail
}
unix_listener replication-notify {
group = dovemail
mode = 0666
user = dovemail
}
}
service auth-worker {
user = $default_internal_user
}
service auth {
client_limit = 10240
process_limit = 1
process_min_avail = 1
}
service doveadm {
inet_listener {
address = 192.168.0.1
port = 12345
}
vsz_limit = 1 G
}
service imap {
process_limit = 8192
process_min_avail = 10
}
service lmtp {
inet_listener {
address = lmtpcluster.internal.mydomain.com,
server1.internal.mydomain.com
port = 1124
}
process_limit = 512
process_min_avail = 10
}
service managesieve-login {
inet_listener sieve {
address = lmtpcluster.internal.mydomain.com,
server1.internal.mydomain.com
port = 4190
}
}
service managesieve {
process_limit = 20
process_min_avail = 10
}
service pop3 {
process_limit = 512
process_min_avail = 10
}
service replicator {
process_min_avail = 1
unix_listener replicator-doveadm {
group = dovemail
mode = 0666
user = dovemail
}
}
ssl_cert = </etc/ssl/certs/mydomain.crt
ssl_key = </etc/ssl/private/mydomain.key
userdb {
driver = prefetch
}
userdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
verbose_proctitle = yes
protocol imap {
imap_client_workarounds = tb-extra-mailbox-sep delay-newmail
imap_idle_notify_interval = 2 mins
imap_max_line_length = 64 k
mail_max_userip_connections = 50
mail_plugins = " notify replication quota imap_quota"
}
protocol lmtp {
info_log_path = /var/log/mail/dovecot-lmtp.log
mail_fsync = optimized
mail_plugins = " notify replication sieve quota"
}
protocol sieve {
mail_plugins = " notify replication sieve"
managesieve_implementation_string = ManageSieve
managesieve_logout_format = bytes=%i/%o
managesieve_max_line_length = 65536
managesieve_sieve_capability = comparator-i;ascii-numeric copy
envelope fileinto imapflags include notify regex reject relational
subaddress vacation-seconds
ssl = no
}
protocol pop3 {
mail_plugins = " notify replication quota"
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
}
=== Director instance ==
# dovecot -n -c /etc/dovecot_director/dovecot_director.conf
# 2.2.15: /etc/dovecot_director/dovecot_director.conf
# OS: Linux 3.16.0-37-generic x86_64 Ubuntu 14.04.2 LTS
auth_master_user_separator = *
auth_mechanisms = plain login
auth_username_chars
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@auth_worker_max_count
= 10
base_dir = /var/run/dovecot_director
director_mail_servers = server1.internal.mydomain.com
server2.internal.mydomain.com
director_servers = A.B.C.1 A.B.C.2 # server1 and server2 external IP
addresses
disable_plaintext_auth = no
instance_name = dovecot_director
listen = lmtpcluster.mydomain.com, server1.mydomain.com
lmtp_proxy = yes
login_greeting = IMAP/POP3 server
mail_fsync = never
mail_gid = dovemail
mail_plugins = " quota"
mail_uid = dovemail
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 ihave
passdb {
args = /etc/dovecot_director/dovecot_director-sql.conf.ext
driver = sql
}
passdb {
args = /etc/dovecot_director/dovecot_director-sql-master.conf.ext
driver = sql
master = yes
pass = yes
}
protocols = imap pop3 lmtp
service auth-worker {
user = $default_internal_user
}
service auth {
client_limit = 10240
process_limit = 1
process_min_avail = 1
}
service director {
fifo_listener login/proxy-notify {
mode = 0666
}
inet_listener {
address = A.B.C.1
port = 7777
}
unix_listener director-userdb {
mode = 0600
}
unix_listener login/director {
mode = 0666
}
}
service imap-login {
executable = imap-login director
idle_kill = 10 secs
inet_listener imap {
port = 143
}
process_limit = 400
process_min_avail = 10
service_count = 0
vsz_limit = 512 M
}
service lmtp {
inet_listener lmtp {
address = lmtpcluster.internal.mydomain.com,
server1.internal.mydomain.com
port = 24
}
process_limit = 512
}
service pop3-login {
executable = pop3-login director
idle_kill = 10 secs
inet_listener pop3 {
port = 110
}
process_limit = 256
}
ssl_cert = </etc/ssl/certs/mydomain.crt
ssl_key = </etc/ssl/private/mydomain.key
userdb {
driver = prefetch
}
userdb {
args = /etc/dovecot_director/dovecot_director-sql.conf.ext
driver = sql
}
verbose_proctitle = yes
protocol lmtp {
auth_socket_path = director-userdb
info_log_path = /var/log/mail/dovecot-director-lmtp.log
passdb {
args = proxy=y nopassword=y port=1124
driver = static
name }
}
Thanks in advance,
Andre
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 490 bytes
Desc: OpenPGP digital signature
URL:
<http://dovecot.org/pipermail/dovecot/attachments/20150611/4ab78beb/attachment.sig>
