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xmpp.chapril.org-ejabberd/src/ejabberd_admin.erl
Badlop 4117a5e856 New command to set master Mnesia node
2010-02-15 23:25:02 +01:00

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%%%-------------------------------------------------------------------
%%% File : ejabberd_admin.erl
%%% Author : Mickael Remond <mremond@process-one.net>
%%% Purpose : Administrative functions and commands
%%% Created : 7 May 2006 by Mickael Remond <mremond@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2010 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License
%%% along with this program; if not, write to the Free Software
%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%-------------------------------------------------------------------
-module(ejabberd_admin).
-author('mickael.remond@process-one.net').
-export([start/0, stop/0,
%% Server
status/0, reopen_log/0,
stop_kindly/2, send_service_message_all_mucs/2,
%% Accounts
register/3, unregister/2,
registered_users/1,
%% Migration jabberd1.4
import_file/1, import_dir/1,
%% Purge DB
delete_expired_messages/0, delete_old_messages/1,
%% Mnesia
set_master/1,
backup_mnesia/1, restore_mnesia/1,
dump_mnesia/1, dump_table/2, load_mnesia/1,
install_fallback_mnesia/1,
dump_to_textfile/1, dump_to_textfile/2,
mnesia_change_nodename/4,
restore/1 % Still used by some modules
]).
-include("ejabberd.hrl").
-include("ejabberd_commands.hrl").
start() ->
ejabberd_commands:register_commands(commands()).
stop() ->
ejabberd_commands:unregister_commands(commands()).
%%%
%%% ejabberd commands
%%%
commands() ->
[
%% The commands status, stop and restart are implemented also in ejabberd_ctl
%% They are defined here so that other interfaces can use them too
#ejabberd_commands{name = status, tags = [server],
desc = "Get status of the ejabberd server",
module = ?MODULE, function = status,
args = [], result = {res, restuple}},
#ejabberd_commands{name = stop, tags = [server],
desc = "Stop ejabberd gracefully",
module = init, function = stop,
args = [], result = {res, rescode}},
#ejabberd_commands{name = restart, tags = [server],
desc = "Restart ejabberd gracefully",
module = init, function = restart,
args = [], result = {res, rescode}},
#ejabberd_commands{name = reopen_log, tags = [logs, server],
desc = "Reopen the log files",
module = ?MODULE, function = reopen_log,
args = [], result = {res, rescode}},
#ejabberd_commands{name = stop_kindly, tags = [server],
desc = "Inform users and rooms, wait, and stop the server",
module = ?MODULE, function = stop_kindly,
args = [{delay, integer}, {announcement, string}],
result = {res, rescode}},
#ejabberd_commands{name = get_loglevel, tags = [logs, server],
desc = "Get the current loglevel",
module = ejabberd_loglevel, function = get,
args = [],
result = {leveltuple, {tuple, [{levelnumber, integer},
{levelatom, atom},
{leveldesc, string}
]}}},
#ejabberd_commands{name = register, tags = [accounts],
desc = "Register a user",
module = ?MODULE, function = register,
args = [{user, string}, {host, string}, {password, string}],
result = {res, restuple}},
#ejabberd_commands{name = unregister, tags = [accounts],
desc = "Unregister a user",
module = ?MODULE, function = unregister,
args = [{user, string}, {host, string}],
result = {res, restuple}},
#ejabberd_commands{name = registered_users, tags = [accounts],
desc = "List all registered users in HOST",
module = ?MODULE, function = registered_users,
args = [{host, string}],
result = {users, {list, {username, string}}}},
#ejabberd_commands{name = import_file, tags = [mnesia],
desc = "Import user data from jabberd14 spool file",
module = ?MODULE, function = import_file,
args = [{file, string}], result = {res, restuple}},
#ejabberd_commands{name = import_dir, tags = [mnesia],
desc = "Import users data from jabberd14 spool dir",
module = ?MODULE, function = import_dir,
args = [{file, string}],
result = {res, restuple}},
#ejabberd_commands{name = import_piefxis, tags = [mnesia],
desc = "Import users data from a PIEFXIS file (XEP-0227)",
module = ejabberd_piefxis, function = import_file,
args = [{file, string}], result = {res, rescode}},
#ejabberd_commands{name = export_piefxis, tags = [mnesia],
desc = "Export data of all users in the server to PIEFXIS files (XEP-0227)",
module = ejabberd_piefxis, function = export_server,
args = [{dir, string}], result = {res, rescode}},
#ejabberd_commands{name = export_piefxis_host, tags = [mnesia],
desc = "Export data of users in a host to PIEFXIS files (XEP-0227)",
module = ejabberd_piefxis, function = export_host,
args = [{dir, string}, {host, string}], result = {res, rescode}},
#ejabberd_commands{name = delete_expired_messages, tags = [purge],
desc = "Delete expired offline messages from database",
module = ?MODULE, function = delete_expired_messages,
args = [], result = {res, rescode}},
#ejabberd_commands{name = delete_old_messages, tags = [purge],
desc = "Delete offline messages older than DAYS",
module = ?MODULE, function = delete_old_messages,
args = [{days, integer}], result = {res, rescode}},
#ejabberd_commands{name = set_master, tags = [mnesia],
desc = "Set master node of the clustered Mnesia tables",
longdesc = "If you provie as nodename \"self\", this "
"node will be set as its own master.",
module = ?MODULE, function = set_master,
args = [{nodename, string}], result = {res, restuple}},
#ejabberd_commands{name = mnesia_change_nodename, tags = [mnesia],
desc = "Change the erlang node name in a backup file",
module = ?MODULE, function = mnesia_change_nodename,
args = [{oldnodename, string}, {newnodename, string},
{oldbackup, string}, {newbackup, string}],
result = {res, restuple}},
#ejabberd_commands{name = backup, tags = [mnesia],
desc = "Store the database to backup file",
module = ?MODULE, function = backup_mnesia,
args = [{file, string}], result = {res, restuple}},
#ejabberd_commands{name = restore, tags = [mnesia],
desc = "Restore the database from backup file",
module = ?MODULE, function = restore_mnesia,
args = [{file, string}], result = {res, restuple}},
#ejabberd_commands{name = dump, tags = [mnesia],
desc = "Dump the database to text file",
module = ?MODULE, function = dump_mnesia,
args = [{file, string}], result = {res, restuple}},
#ejabberd_commands{name = dump_table, tags = [mnesia],
desc = "Dump a table to text file",
module = ?MODULE, function = dump_table,
args = [{file, string}, {table, string}], result = {res, restuple}},
#ejabberd_commands{name = load, tags = [mnesia],
desc = "Restore the database from text file",
module = ?MODULE, function = load_mnesia,
args = [{file, string}], result = {res, restuple}},
#ejabberd_commands{name = install_fallback, tags = [mnesia],
desc = "Install the database from a fallback file",
module = ?MODULE, function = install_fallback_mnesia,
args = [{file, string}], result = {res, restuple}}
].
%%%
%%% Server management
%%%
status() ->
{InternalStatus, ProvidedStatus} = init:get_status(),
String1 = io_lib:format("The node ~p is ~p. Status: ~p",
[node(), InternalStatus, ProvidedStatus]),
{Is_running, String2} =
case lists:keysearch(ejabberd, 1, application:which_applications()) of
false ->
{ejabberd_not_running, "ejabberd is not running in that node."};
{value, {_, _, Version}} ->
{ok, io_lib:format("ejabberd ~s is running in that node", [Version])}
end,
{Is_running, String1 ++ String2}.
reopen_log() ->
ejabberd_hooks:run(reopen_log_hook, []),
%% TODO: Use the Reopen log API for logger_h ?
ejabberd_logger_h:reopen_log(),
case application:get_env(sasl,sasl_error_logger) of
{ok, {file, SASLfile}} ->
error_logger:delete_report_handler(sasl_report_file_h),
ejabberd_logger_h:rotate_log(SASLfile),
error_logger:add_report_handler(sasl_report_file_h,
{SASLfile, get_sasl_error_logger_type()});
_ -> false
end,
ok.
%% Function copied from Erlang/OTP lib/sasl/src/sasl.erl which doesn't export it
get_sasl_error_logger_type () ->
case application:get_env (sasl, errlog_type) of
{ok, error} -> error;
{ok, progress} -> progress;
{ok, all} -> all;
{ok, Bad} -> exit ({bad_config, {sasl, {errlog_type, Bad}}});
_ -> all
end.
%%%
%%% Stop Kindly
%%%
stop_kindly(DelaySeconds, AnnouncementText) ->
Subject = io_lib:format("Server stop in ~p seconds!", [DelaySeconds]),
WaitingDesc = io_lib:format("Waiting ~p seconds", [DelaySeconds]),
Steps = [
{"Stopping ejabberd port listeners",
ejabberd_listener, stop_listeners, []},
{"Sending announcement to connected users",
mod_announce, send_announcement_to_all,
[?MYNAME, Subject, AnnouncementText]},
{"Sending service message to MUC rooms",
ejabberd_admin, send_service_message_all_mucs,
[Subject, AnnouncementText]},
{WaitingDesc, timer, sleep, [DelaySeconds * 1000]},
{"Stopping ejabberd", application, stop, [ejabberd]},
{"Stopping Mnesia", mnesia, stop, []},
{"Stopping Erlang node", init, stop, []}
],
NumberLast = length(Steps),
TimestampStart = calendar:datetime_to_gregorian_seconds({date(), time()}),
lists:foldl(
fun({Desc, Mod, Func, Args}, NumberThis) ->
SecondsDiff =
calendar:datetime_to_gregorian_seconds({date(), time()})
- TimestampStart,
io:format("[~p/~p ~ps] ~s... ",
[NumberThis, NumberLast, SecondsDiff, Desc]),
Result = apply(Mod, Func, Args),
io:format("~p~n", [Result]),
NumberThis+1
end,
1,
Steps),
ok.
send_service_message_all_mucs(Subject, AnnouncementText) ->
Message = io_lib:format("~s~n~s", [Subject, AnnouncementText]),
lists:foreach(
fun(ServerHost) ->
MUCHost = gen_mod:get_module_opt_host(
ServerHost, mod_muc, "conference.@HOST@"),
MUCHostB = list_to_binary(MUCHost),
mod_muc:broadcast_service_message(MUCHostB, Message)
end,
?MYHOSTS).
%%%
%%% Account management
%%%
register(User, Host, Password) ->
case ejabberd_auth:try_register(User, Host, Password) of
{atomic, ok} ->
{ok, io_lib:format("User ~s@~s succesfully registered", [User, Host])};
{atomic, exists} ->
String = io_lib:format("User ~s@~s already registered at node ~p",
[User, Host, node()]),
{exists, String};
{error, Reason} ->
String = io_lib:format("Can't register user ~s@~s at node ~p: ~p",
[User, Host, node(), Reason]),
{cannot_register, String}
end.
unregister(User, Host) ->
ejabberd_auth:remove_user(User, Host),
{ok, ""}.
registered_users(Host) ->
Users = ejabberd_auth:get_vh_registered_users(Host),
SUsers = lists:sort(Users),
lists:map(fun({U, _S}) -> U end, SUsers).
%%%
%%% Migration management
%%%
import_file(Path) ->
case jd2ejd:import_file(Path) of
ok ->
{ok, ""};
{error, Reason} ->
String = io_lib:format("Can't import jabberd14 spool file ~p at node ~p: ~p",
[filename:absname(Path), node(), Reason]),
{cannot_import_file, String}
end.
import_dir(Path) ->
case jd2ejd:import_dir(Path) of
ok ->
{ok, ""};
{error, Reason} ->
String = io_lib:format("Can't import jabberd14 spool dir ~p at node ~p: ~p",
[filename:absname(Path), node(), Reason]),
{cannot_import_dir, String}
end.
%%%
%%% Purge DB
%%%
delete_expired_messages() ->
{atomic, ok} = mod_offline:remove_expired_messages(),
ok.
delete_old_messages(Days) ->
{atomic, _} = mod_offline:remove_old_messages(Days),
ok.
%%%
%%% Mnesia management
%%%
set_master("self") ->
set_master(node());
set_master(NodeString) when is_list(NodeString) ->
set_master(list_to_atom(NodeString));
set_master(Node) when is_atom(Node) ->
case mnesia:set_master_nodes([Node]) of
ok ->
{ok, ""};
{error, Reason} ->
String = io_lib:format("Can't set master node ~p at node ~p:~n~p",
[Node, node(), Reason]),
{error, String}
end.
backup_mnesia(Path) ->
case mnesia:backup(Path) of
ok ->
{ok, ""};
{error, Reason} ->
String = io_lib:format("Can't store backup in ~p at node ~p: ~p",
[filename:absname(Path), node(), Reason]),
{cannot_backup, String}
end.
restore_mnesia(Path) ->
case ejabberd_admin:restore(Path) of
{atomic, _} ->
{ok, ""};
{error, Reason} ->
String = io_lib:format("Can't restore backup from ~p at node ~p: ~p",
[filename:absname(Path), node(), Reason]),
{cannot_restore, String};
{aborted,{no_exists,Table}} ->
String = io_lib:format("Can't restore backup from ~p at node ~p: Table ~p does not exist.",
[filename:absname(Path), node(), Table]),
{table_not_exists, String};
{aborted,enoent} ->
String = io_lib:format("Can't restore backup from ~p at node ~p: File not found.",
[filename:absname(Path), node()]),
{file_not_found, String}
end.
%% Mnesia database restore
%% This function is called from ejabberd_ctl, ejabberd_web_admin and
%% mod_configure/adhoc
restore(Path) ->
mnesia:restore(Path, [{keep_tables,keep_tables()},
{default_op, skip_tables}]).
%% This function return a list of tables that should be kept from a previous
%% version backup.
%% Obsolete tables or tables created by module who are no longer used are not
%% restored and are ignored.
keep_tables() ->
lists:flatten([acl, passwd, config, local_config, disco_publish,
keep_modules_tables()]).
%% Returns the list of modules tables in use, according to the list of actually
%% loaded modules
keep_modules_tables() ->
lists:map(fun(Module) -> module_tables(Module) end,
gen_mod:loaded_modules(?MYNAME)).
%% TODO: This mapping should probably be moved to a callback function in each
%% module.
%% Mapping between modules and their tables
module_tables(mod_announce) -> [motd, motd_users];
module_tables(mod_irc) -> [irc_custom];
module_tables(mod_last) -> [last_activity];
module_tables(mod_muc) -> [muc_room, muc_registered];
module_tables(mod_offline) -> [offline_msg];
module_tables(mod_privacy) -> [privacy];
module_tables(mod_private) -> [private_storage];
module_tables(mod_pubsub) -> [pubsub_node];
module_tables(mod_roster) -> [roster];
module_tables(mod_shared_roster) -> [sr_group, sr_user];
module_tables(mod_vcard) -> [vcard, vcard_search];
module_tables(_Other) -> [].
get_local_tables() ->
Tabs1 = lists:delete(schema, mnesia:system_info(local_tables)),
Tabs = lists:filter(
fun(T) ->
case mnesia:table_info(T, storage_type) of
disc_copies -> true;
disc_only_copies -> true;
_ -> false
end
end, Tabs1),
Tabs.
dump_mnesia(Path) ->
Tabs = get_local_tables(),
dump_tables(Path, Tabs).
dump_table(Path, STable) ->
Table = list_to_atom(STable),
dump_tables(Path, [Table]).
dump_tables(Path, Tables) ->
case dump_to_textfile(Path, Tables) of
ok ->
{ok, ""};
{error, Reason} ->
String = io_lib:format("Can't store dump in ~p at node ~p: ~p",
[filename:absname(Path), node(), Reason]),
{cannot_dump, String}
end.
dump_to_textfile(File) ->
Tabs = get_local_tables(),
dump_to_textfile(File, Tabs).
dump_to_textfile(File, Tabs) ->
dump_to_textfile(mnesia:system_info(is_running), Tabs, file:open(File, [write])).
dump_to_textfile(yes, Tabs, {ok, F}) ->
Defs = lists:map(
fun(T) -> {T, [{record_name, mnesia:table_info(T, record_name)},
{attributes, mnesia:table_info(T, attributes)}]}
end,
Tabs),
io:format(F, "~p.~n", [{tables, Defs}]),
lists:foreach(fun(T) -> dump_tab(F, T) end, Tabs),
file:close(F);
dump_to_textfile(_, _, {ok, F}) ->
file:close(F),
{error, mnesia_not_running};
dump_to_textfile(_, _, {error, Reason}) ->
{error, Reason}.
dump_tab(F, T) ->
W = mnesia:table_info(T, wild_pattern),
{atomic,All} = mnesia:transaction(
fun() -> mnesia:match_object(T, W, read) end),
lists:foreach(
fun(Term) -> io:format(F,"~p.~n", [setelement(1, Term, T)]) end, All).
load_mnesia(Path) ->
case mnesia:load_textfile(Path) of
{atomic, ok} ->
{ok, ""};
{error, Reason} ->
String = io_lib:format("Can't load dump in ~p at node ~p: ~p",
[filename:absname(Path), node(), Reason]),
{cannot_load, String}
end.
install_fallback_mnesia(Path) ->
case mnesia:install_fallback(Path) of
ok ->
{ok, ""};
{error, Reason} ->
String = io_lib:format("Can't install fallback from ~p at node ~p: ~p",
[filename:absname(Path), node(), Reason]),
{cannot_fallback, String}
end.
mnesia_change_nodename(FromString, ToString, Source, Target) ->
From = list_to_atom(FromString),
To = list_to_atom(ToString),
Switch =
fun
(Node) when Node == From ->
io:format(" - Replacing nodename: '~p' with: '~p'~n", [From, To]),
To;
(Node) when Node == To ->
%% throw({error, already_exists});
io:format(" - Node: '~p' will not be modified (it is already '~p')~n", [Node, To]),
Node;
(Node) ->
io:format(" - Node: '~p' will not be modified (it is not '~p')~n", [Node, From]),
Node
end,
Convert =
fun
({schema, db_nodes, Nodes}, Acc) ->
io:format(" +++ db_nodes ~p~n", [Nodes]),
{[{schema, db_nodes, lists:map(Switch,Nodes)}], Acc};
({schema, version, Version}, Acc) ->
io:format(" +++ version: ~p~n", [Version]),
{[{schema, version, Version}], Acc};
({schema, cookie, Cookie}, Acc) ->
io:format(" +++ cookie: ~p~n", [Cookie]),
{[{schema, cookie, Cookie}], Acc};
({schema, Tab, CreateList}, Acc) ->
io:format("~n * Checking table: '~p'~n", [Tab]),
Keys = [ram_copies, disc_copies, disc_only_copies],
OptSwitch =
fun({Key, Val}) ->
case lists:member(Key, Keys) of
true ->
io:format(" + Checking key: '~p'~n", [Key]),
{Key, lists:map(Switch, Val)};
false-> {Key, Val}
end
end,
Res = {[{schema, Tab, lists:map(OptSwitch, CreateList)}], Acc},
Res;
(Other, Acc) ->
{[Other], Acc}
end,
mnesia:traverse_backup(Source, Target, Convert, switched).
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