DOVEADM-DIRECTOR(1) Dovecot DOVEADM-DIRECTOR(1)
NAME
doveadm-director - Manage Dovecot directors
SYNOPSIS
doveadm [-Dv] [-f formatter] director command [OPTIONS] [ARGUMENTS]
DESCRIPTION
doveadm director can be used to manage and query the status of the list
of backend mail servers where Dovecot proxy can redirect connections
to.
OPTIONS
Global doveadm(1) options:
-D Enables verbosity and debug messages.
-f formatter
Specifies the formatter for formatting the output. Supported
formatters are:
flow prints each line with key=value pairs.
pager prints each key: value pair on its own line and separates
records with form feed character (^L).
tab prints a table header followed by tab separated value
lines.
table prints a table header followed by adjusted value lines.
-o setting=value
Overrides the configuration setting from /etc/dovecot/dove-
cot.conf and from the userdb with the given value. In order to
override multiple settings, the -o option may be specified mul-
tiple times.
-v Enables verbosity, including progress counter.
Command specific options:
-a director_socket_path
This option is used to specify an alternative socket. The
option's argument is either an absolute path to a local UNIX
domain socket, or a hostname and port (hostname:port), in order
to connect a remote host via a TCP socket.
By default doveadm(1) will use the socket /var/run/dove-
cot/director-admin. The socket may be located in another direc-
tory, when the default base_dir setting was overridden in
/etc/dovecot/dovecot.conf.
ARGUMENTS
host A mail server's hostname or IP address.
ip A director's IP address.
port The TCP port, on which the director server is listening for con-
nections. The default port is the same as what the local direc-
tor is listening in.
user Is a user's login name. Depending on the configuration, a login
name may be for example jane or john AT example.com.
vhost_count
The number of "virtual hosts" to assign to this server. The
higher the number is relative to other servers, the more connec-
tions it gets. The default is 100.
COMMANDS
director add
doveadm director add [-a director_socket_path] host [vhost_count]
The command's tasks are:
* assign a new mail server to the director.
* increase/decrease the vhost_count of an already assigned server.
director dump
doveadm director dump [-a director_socket_path]
Dump the current host configuration as doveadm commands. These commands
can be easily run after a full director cluster restart to get back to
the dumped state.
director flush
doveadm director flush [-a director_socket_path] [-F] [--max-parallel
n] host|all
doveadm director flush removes all user associations either from the
given host or all hosts. All the existing connections will be kicked.
If director_flush_socket is specified, a flush script is also automati-
cally executed.
Because the kicking and moving of users to new backends creates a tem-
porary load spike, all the users aren't moved at once. The --max-paral-
lel parameter specifies how many users can be moved concurrently. The
default is 100.
If the -F parameter is used, the user associations are simply dropped.
Existing connections won't be kicked and flush scripts aren't run.
director kick
doveadm director kick [-a director_socket_path] user
Kick the specified user from the entire Dovecot cluster. This is simi-
lar to doveadm proxy kick, but this command needs to be run only once
instead of in each director server.
director map
doveadm director map [-a director_socket_path] [-f users_file] [-h|-u]
[host]
The command doveadm director map is used to list current user -> host
mappings. Note that the director works using 32bit hashes which makes
collisions quite likely, so this command can't reliably list exactly
which users have recently logged in.
-f users_file
Path to a file containing all user names (one per line). When
given no userdb lookup will be performed. This may be a helpful
alternative when for example the network connection to the LDAP
or SQL server is slow.
-h Output all usernames, which match the given hash.
-u Output hash for the given username.
host Specify a server's IP address or hostname, to list only mappings
of the given host.
director move
doveadm director move [-a director_socket_path] user host
Move the user to the specified backend host. If the user has any
existing connections they will be killed.
director remove
doveadm director remove [-a director_socket_path] host
Use this command in order to remove the given host from the director.
director ring add
doveadm director ring add [-a director_socket_path] ip [port]
Add a new director to the ring.
director ring remove
doveadm director ring remove [-a director_socket_path] ip [port]
Remove a director from the ring.
director ring status
doveadm director ring status [-a director_socket_path]
Show the status of all the directors currently in the ring.
director status
doveadm director status [-a director_socket_path] [user]
This command is used to show the current usage of all assigned mail
servers.
When a user name is given, this command shows which server the user is
currently assigned to, where the user will be assigned after the cur-
rent saved assignment gets removed and where the user would be assigned
to if the whole proxy cluster was restarted fresh.
FILES
/etc/dovecot/dovecot.conf
Dovecot's main configuration file.
/etc/dovecot/conf.d/10-director.conf
Director specific settings.
EXAMPLE
Add a director with vhost count 150 (or change existing one's vhost
count to 150):
doveadm -v director add x1357.imap.ha.example.net 150
2001:db8:543:6861:143::1357: OK
Remove a director:
doveadm director remove x1357.imap.ha.example.net
Query the status of mail hosts in a director:
doveadm director status
mail server ip vhosts users
192.168.10.1 100 125
192.168.10.2 100 144
192.168.10.3 100 115
Query the status of a user's assignment:
doveadm director status user AT example.com
Current: 192.168.10.1 (expires 2010-06-18 20:17:04)
Hashed: 192.168.10.2
Initial config: 192.168.10.3
This means that the user is currently assigned to mail server on IP
192.168.10.1. After all of user's connections have logged out, the
assignment will be removed (currently it looks like at 20:17:04, but
that may be increased). After the assignment has expired, the user will
next time be redirected to 192.168.10.2 (assuming no changes to direc-
tor settings). If the entire Dovecot proxy cluster was restarted, so
that all of the director configuration would revert back to its initial
values, the user would be redirected to 192.168.10.3.
REPORTING BUGS
Report bugs, including doveconf -n output, to the Dovecot Mailing List
<dovecot AT dovecot.org>. Information about reporting bugs is available
at: http://dovecot.org/bugreport.html
SEE ALSO
doveadm(1)
Dovecot v2.3 2014-08-30 DOVEADM-DIRECTOR(1)
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