replication dropped imap flags

[Patrick Cernko]

Hi list,

I think, I found a bug in the replication setup, that drops (custom) 
flags like Thunderbird labels. I have set up a simple 2 node setup to 
reproduce and explain it:

Host adove.mpi-klsb.mpg.de and bdove.mpi-klsb.mpg.de (doveconf -n 
attached) have dovecot-imapd (from repo.dovecot.org) installed on an 
ext4 filesystem. They only have one account "test" via 
/etc/dovecot/userdb ("test:testpassword:::Test User::/bin/bash:"). It's 
mailbox contains one message, that is flagged with "$label1":

doveadm -f flow fetch -u test 'guid flags' ALL
guid=d1516a2b5c08fc5b541d00005a350039 flags=\Recent $label1

Now I simulate a node reinstall on adove by uninstalling dovecot, 
removing all remnants, reinstalling and configuring it again:

apt purge dovecot-core dovecot-imapd
rm -rf /var/vmail /var/lib/dovecot /etc/dovecot
apt install dovecot-imapd
# disable system auth
: > /etc/dovecot/conf.d/auth-system.conf.ext
# create /var/vmail
install -d -o nobody -g nogroup -m 700 /var/vmail
# create userdb
echo 'test:testpassword:::Test User::/bin/bash:' > /etc/dovecot/userdb
# create /etc/dovecot/local.conf
# not described here, the resulting doveconf -n is attached!
service dovecot restart


When I check the flags of the mail of user test now, the "$label1" is 
disapeared on both machines, even after "doveadm replicator replicate -f 
test":

doveadm -f flow fetch -u test 'guid flags' ALL
guid=d1516a2b5c08fc5b541d00005a350039 flags=\Recent


Any hints what I am doing wrong here or is this really a bug?

Best,
-- 
Patrick Cernko <pcernko at mpi-klsb.mpg.de> +49 681 9325 5815
Joint Administration: Information Services and Technology
Max-Planck-Institute fuer Informatik & Softwaresysteme
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# 2.3.4 (0ecbaf23d): /etc/dovecot/dovecot.conf
# OS: Linux 4.14.65.1.amd64-smp x86_64 Debian 9.6 
# Hostname: bdove.mpi-klsb.mpg.de
doveadm_password = # hidden, use -P to show it
doveadm_port = 12345
listen = *
mail_gid = nogroup
mail_home = /var/vmail/%u
mail_location = mdbox:~/mdbox
mail_plugins = notify replication
mail_uid = nobody
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  args = /etc/dovecot/userdb
  driver = passwd-file
}
plugin {
  mail_replica = tcp:adove.mpi-klsb.mpg.de
}
protocols = " imap"
service aggregator {
  fifo_listener replication-notify-fifo {
    mode = 0666
  }
  unix_listener replication-notify {
    mode = 0666
  }
}
service doveadm {
  inet_listener doveadm-server {
    port = 12345
  }
}
service replicator {
  process_min_avail = 1
  unix_listener replicator-doveadm {
    mode = 0666
  }
}
ssl = no
userdb {
  args = /etc/dovecot/userdb
  driver = passwd-file
}
-------------- next part --------------
# 2.3.4 (0ecbaf23d): /etc/dovecot/dovecot.conf
# OS: Linux 4.14.65.1.amd64-smp x86_64 Debian 9.6 
# Hostname: adove.mpi-klsb.mpg.de
doveadm_password = # hidden, use -P to show it
doveadm_port = 12345
listen = *
mail_gid = nogroup
mail_home = /var/vmail/%u
mail_location = mdbox:~/mdbox
mail_plugins = notify replication
mail_uid = nobody
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  args = /etc/dovecot/userdb
  driver = passwd-file
}
plugin {
  mail_replica = tcp:bdove.mpi-klsb.mpg.de
}
protocols = " imap"
service aggregator {
  fifo_listener replication-notify-fifo {
    mode = 0666
  }
  unix_listener replication-notify {
    mode = 0666
  }
}
service doveadm {
  inet_listener doveadm-server {
    port = 12345
  }
}
service replicator {
  process_min_avail = 1
  unix_listener replicator-doveadm {
    mode = 0666
  }
}
ssl = no
userdb {
  args = /etc/dovecot/userdb
  driver = passwd-file
}
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