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|
%% The contents of this file are subject to the Mozilla Public License
%% Version 1.1 (the "License"); you may not use this file except in
%% compliance with the License. You may obtain a copy of the License
%% at http://www.mozilla.org/MPL/
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and
%% limitations under the License.
%%
%% The Original Code is RabbitMQ.
%%
%% The Initial Developer of the Original Code is VMware, Inc.
%% Copyright (c) 2007-2012 VMware, Inc. All rights reserved.
%%
-module(rabbit_control).
-include("rabbit.hrl").
-export([start/0, stop/0, action/5]).
-define(RPC_TIMEOUT, infinity).
-define(EXTERNAL_CHECK_INTERVAL, 1000).
-define(QUIET_OPT, "-q").
-define(NODE_OPT, "-n").
-define(VHOST_OPT, "-p").
-define(GLOBAL_QUERIES,
[{"Connections", rabbit_networking, connection_info_all,
connection_info_keys},
{"Channels", rabbit_channel, info_all, info_keys}]).
-define(VHOST_QUERIES,
[{"Queues", rabbit_amqqueue, info_all, info_keys},
{"Exchanges", rabbit_exchange, info_all, info_keys},
{"Bindings", rabbit_binding, info_all, info_keys},
{"Consumers", rabbit_amqqueue, consumers_all, consumer_info_keys},
{"Permissions", rabbit_auth_backend_internal, list_vhost_permissions,
vhost_perms_info_keys}]).
%%----------------------------------------------------------------------------
-ifdef(use_specs).
-spec(start/0 :: () -> no_return()).
-spec(stop/0 :: () -> 'ok').
-spec(action/5 ::
(atom(), node(), [string()], [{string(), any()}],
fun ((string(), [any()]) -> 'ok'))
-> 'ok').
-spec(usage/0 :: () -> no_return()).
-endif.
%%----------------------------------------------------------------------------
start() ->
{ok, [[NodeStr|_]|_]} = init:get_argument(nodename),
{[Command0 | Args], Opts} =
case rabbit_misc:get_options([{flag, ?QUIET_OPT},
{option, ?NODE_OPT, NodeStr},
{option, ?VHOST_OPT, "/"}],
init:get_plain_arguments()) of
{[], _Opts} -> usage();
CmdArgsAndOpts -> CmdArgsAndOpts
end,
Opts1 = [case K of
?NODE_OPT -> {?NODE_OPT, rabbit_nodes:make(V)};
_ -> {K, V}
end || {K, V} <- Opts],
Command = list_to_atom(Command0),
Quiet = proplists:get_bool(?QUIET_OPT, Opts1),
Node = proplists:get_value(?NODE_OPT, Opts1),
Inform = case Quiet of
true -> fun (_Format, _Args1) -> ok end;
false -> fun (Format, Args1) ->
io:format(Format ++ " ...~n", Args1)
end
end,
PrintInvalidCommandError =
fun () ->
print_error("invalid command '~s'",
[string:join([atom_to_list(Command) | Args], " ")])
end,
%% The reason we don't use a try/catch here is that rpc:call turns
%% thrown errors into normal return values
case catch action(Command, Node, Args, Opts, Inform) of
ok ->
case Quiet of
true -> ok;
false -> io:format("...done.~n")
end,
rabbit_misc:quit(0);
{'EXIT', {function_clause, [{?MODULE, action, _} | _]}} -> %% < R15
PrintInvalidCommandError(),
usage();
{'EXIT', {function_clause, [{?MODULE, action, _, _} | _]}} -> %% >= R15
PrintInvalidCommandError(),
usage();
{'EXIT', {badarg, _}} ->
print_error("invalid parameter: ~p", [Args]),
usage();
{error, Reason} ->
print_error("~p", [Reason]),
rabbit_misc:quit(2);
{error_string, Reason} ->
print_error("~s", [Reason]),
rabbit_misc:quit(2);
{badrpc, {'EXIT', Reason}} ->
print_error("~p", [Reason]),
rabbit_misc:quit(2);
{badrpc, Reason} ->
print_error("unable to connect to node ~w: ~w", [Node, Reason]),
print_badrpc_diagnostics(Node),
rabbit_misc:quit(2);
Other ->
print_error("~p", [Other]),
rabbit_misc:quit(2)
end.
fmt_stderr(Format, Args) -> rabbit_misc:format_stderr(Format ++ "~n", Args).
print_report(Node, {Descr, Module, InfoFun, KeysFun}) ->
io:format("~s:~n", [Descr]),
print_report0(Node, {Module, InfoFun, KeysFun}, []).
print_report(Node, {Descr, Module, InfoFun, KeysFun}, VHostArg) ->
io:format("~s on ~s:~n", [Descr, VHostArg]),
print_report0(Node, {Module, InfoFun, KeysFun}, VHostArg).
print_report0(Node, {Module, InfoFun, KeysFun}, VHostArg) ->
case Results = rpc_call(Node, Module, InfoFun, VHostArg) of
[_|_] -> InfoItems = rpc_call(Node, Module, KeysFun, []),
display_row([atom_to_list(I) || I <- InfoItems]),
display_info_list(Results, InfoItems);
_ -> ok
end,
io:nl().
print_error(Format, Args) -> fmt_stderr("Error: " ++ Format, Args).
print_badrpc_diagnostics(Node) ->
fmt_stderr(rabbit_nodes:diagnostics([Node]), []).
stop() ->
ok.
usage() ->
io:format("~s", [rabbit_ctl_usage:usage()]),
rabbit_misc:quit(1).
%%----------------------------------------------------------------------------
action(stop, Node, Args, _Opts, Inform) ->
Inform("Stopping and halting node ~p", [Node]),
Res = call(Node, {rabbit, stop_and_halt, []}),
case {Res, Args} of
{ok, [PidFile]} -> wait_for_process_death(
read_pid_file(PidFile, false));
{ok, [_, _| _]} -> exit({badarg, Args});
_ -> ok
end,
Res;
action(stop_app, Node, [], _Opts, Inform) ->
Inform("Stopping node ~p", [Node]),
call(Node, {rabbit, stop, []});
action(start_app, Node, [], _Opts, Inform) ->
Inform("Starting node ~p", [Node]),
call(Node, {rabbit, start, []});
action(reset, Node, [], _Opts, Inform) ->
Inform("Resetting node ~p", [Node]),
call(Node, {rabbit_mnesia, reset, []});
action(force_reset, Node, [], _Opts, Inform) ->
Inform("Forcefully resetting node ~p", [Node]),
call(Node, {rabbit_mnesia, force_reset, []});
action(cluster, Node, ClusterNodeSs, _Opts, Inform) ->
ClusterNodes = lists:map(fun list_to_atom/1, ClusterNodeSs),
Inform("Clustering node ~p with ~p",
[Node, ClusterNodes]),
rpc_call(Node, rabbit_mnesia, cluster, [ClusterNodes]);
action(force_cluster, Node, ClusterNodeSs, _Opts, Inform) ->
ClusterNodes = lists:map(fun list_to_atom/1, ClusterNodeSs),
Inform("Forcefully clustering node ~p with ~p (ignoring offline nodes)",
[Node, ClusterNodes]),
rpc_call(Node, rabbit_mnesia, force_cluster, [ClusterNodes]);
action(wait, Node, [PidFile], _Opts, Inform) ->
Inform("Waiting for ~p", [Node]),
wait_for_application(Node, PidFile, Inform);
action(status, Node, [], _Opts, Inform) ->
Inform("Status of node ~p", [Node]),
display_call_result(Node, {rabbit, status, []});
action(cluster_status, Node, [], _Opts, Inform) ->
Inform("Cluster status of node ~p", [Node]),
display_call_result(Node, {rabbit_mnesia, status, []});
action(environment, Node, _App, _Opts, Inform) ->
Inform("Application environment of node ~p", [Node]),
display_call_result(Node, {rabbit, environment, []});
action(rotate_logs, Node, [], _Opts, Inform) ->
Inform("Reopening logs for node ~p", [Node]),
call(Node, {rabbit, rotate_logs, [""]});
action(rotate_logs, Node, Args = [Suffix], _Opts, Inform) ->
Inform("Rotating logs to files with suffix ~p", [Suffix]),
call(Node, {rabbit, rotate_logs, Args});
action(close_connection, Node, [PidStr, Explanation], _Opts, Inform) ->
Inform("Closing connection ~s", [PidStr]),
rpc_call(Node, rabbit_networking, close_connection,
[rabbit_misc:string_to_pid(PidStr), Explanation]);
action(add_user, Node, Args = [Username, _Password], _Opts, Inform) ->
Inform("Creating user ~p", [Username]),
call(Node, {rabbit_auth_backend_internal, add_user, Args});
action(delete_user, Node, Args = [_Username], _Opts, Inform) ->
Inform("Deleting user ~p", Args),
call(Node, {rabbit_auth_backend_internal, delete_user, Args});
action(change_password, Node, Args = [Username, _Newpassword], _Opts, Inform) ->
Inform("Changing password for user ~p", [Username]),
call(Node, {rabbit_auth_backend_internal, change_password, Args});
action(clear_password, Node, Args = [Username], _Opts, Inform) ->
Inform("Clearing password for user ~p", [Username]),
call(Node, {rabbit_auth_backend_internal, clear_password, Args});
action(set_user_tags, Node, [Username | TagsStr], _Opts, Inform) ->
Tags = [list_to_atom(T) || T <- TagsStr],
Inform("Setting tags for user ~p to ~p", [Username, Tags]),
rpc_call(Node, rabbit_auth_backend_internal, set_tags,
[list_to_binary(Username), Tags]);
action(list_users, Node, [], _Opts, Inform) ->
Inform("Listing users", []),
display_info_list(
call(Node, {rabbit_auth_backend_internal, list_users, []}),
rabbit_auth_backend_internal:user_info_keys());
action(add_vhost, Node, Args = [_VHostPath], _Opts, Inform) ->
Inform("Creating vhost ~p", Args),
call(Node, {rabbit_vhost, add, Args});
action(delete_vhost, Node, Args = [_VHostPath], _Opts, Inform) ->
Inform("Deleting vhost ~p", Args),
call(Node, {rabbit_vhost, delete, Args});
action(list_vhosts, Node, Args, _Opts, Inform) ->
Inform("Listing vhosts", []),
ArgAtoms = default_if_empty(Args, [name]),
display_info_list(call(Node, {rabbit_vhost, info_all, []}), ArgAtoms);
action(list_user_permissions, Node, Args = [_Username], _Opts, Inform) ->
Inform("Listing permissions for user ~p", Args),
display_info_list(call(Node, {rabbit_auth_backend_internal,
list_user_permissions, Args}),
rabbit_auth_backend_internal:user_perms_info_keys());
action(list_queues, Node, Args, Opts, Inform) ->
Inform("Listing queues", []),
VHostArg = list_to_binary(proplists:get_value(?VHOST_OPT, Opts)),
ArgAtoms = default_if_empty(Args, [name, messages]),
display_info_list(rpc_call(Node, rabbit_amqqueue, info_all,
[VHostArg, ArgAtoms]),
ArgAtoms);
action(list_exchanges, Node, Args, Opts, Inform) ->
Inform("Listing exchanges", []),
VHostArg = list_to_binary(proplists:get_value(?VHOST_OPT, Opts)),
ArgAtoms = default_if_empty(Args, [name, type]),
display_info_list(rpc_call(Node, rabbit_exchange, info_all,
[VHostArg, ArgAtoms]),
ArgAtoms);
action(list_bindings, Node, Args, Opts, Inform) ->
Inform("Listing bindings", []),
VHostArg = list_to_binary(proplists:get_value(?VHOST_OPT, Opts)),
ArgAtoms = default_if_empty(Args, [source_name, source_kind,
destination_name, destination_kind,
routing_key, arguments]),
display_info_list(rpc_call(Node, rabbit_binding, info_all,
[VHostArg, ArgAtoms]),
ArgAtoms);
action(list_connections, Node, Args, _Opts, Inform) ->
Inform("Listing connections", []),
ArgAtoms = default_if_empty(Args, [user, peer_address, peer_port, state]),
display_info_list(rpc_call(Node, rabbit_networking, connection_info_all,
[ArgAtoms]),
ArgAtoms);
action(list_channels, Node, Args, _Opts, Inform) ->
Inform("Listing channels", []),
ArgAtoms = default_if_empty(Args, [pid, user, consumer_count,
messages_unacknowledged]),
display_info_list(rpc_call(Node, rabbit_channel, info_all, [ArgAtoms]),
ArgAtoms);
action(list_consumers, Node, _Args, Opts, Inform) ->
Inform("Listing consumers", []),
VHostArg = list_to_binary(proplists:get_value(?VHOST_OPT, Opts)),
display_info_list(rpc_call(Node, rabbit_amqqueue, consumers_all, [VHostArg]),
rabbit_amqqueue:consumer_info_keys());
action(trace_on, Node, [], Opts, Inform) ->
VHost = proplists:get_value(?VHOST_OPT, Opts),
Inform("Starting tracing for vhost ~p", [VHost]),
rpc_call(Node, rabbit_trace, start, [list_to_binary(VHost)]);
action(trace_off, Node, [], Opts, Inform) ->
VHost = proplists:get_value(?VHOST_OPT, Opts),
Inform("Stopping tracing for vhost ~p", [VHost]),
rpc_call(Node, rabbit_trace, stop, [list_to_binary(VHost)]);
action(set_vm_memory_high_watermark, Node, [Arg], _Opts, Inform) ->
Frac = list_to_float(case string:chr(Arg, $.) of
0 -> Arg ++ ".0";
_ -> Arg
end),
Inform("Setting memory threshhold on ~p to ~p", [Node, Frac]),
rpc_call(Node, vm_memory_monitor, set_vm_memory_high_watermark, [Frac]);
action(set_permissions, Node, [Username, CPerm, WPerm, RPerm], Opts, Inform) ->
VHost = proplists:get_value(?VHOST_OPT, Opts),
Inform("Setting permissions for user ~p in vhost ~p", [Username, VHost]),
call(Node, {rabbit_auth_backend_internal, set_permissions,
[Username, VHost, CPerm, WPerm, RPerm]});
action(clear_permissions, Node, [Username], Opts, Inform) ->
VHost = proplists:get_value(?VHOST_OPT, Opts),
Inform("Clearing permissions for user ~p in vhost ~p", [Username, VHost]),
call(Node, {rabbit_auth_backend_internal, clear_permissions,
[Username, VHost]});
action(list_permissions, Node, [], Opts, Inform) ->
VHost = proplists:get_value(?VHOST_OPT, Opts),
Inform("Listing permissions in vhost ~p", [VHost]),
display_info_list(call(Node, {rabbit_auth_backend_internal,
list_vhost_permissions, [VHost]}),
rabbit_auth_backend_internal:vhost_perms_info_keys());
action(report, Node, _Args, _Opts, Inform) ->
io:format("Reporting server status on ~p~n~n", [erlang:universaltime()]),
[begin ok = action(Action, N, [], [], Inform), io:nl() end ||
N <- unsafe_rpc(Node, rabbit_mnesia, running_clustered_nodes, []),
Action <- [status, cluster_status, environment]],
VHosts = unsafe_rpc(Node, rabbit_vhost, list, []),
[print_report(Node, Q) || Q <- ?GLOBAL_QUERIES],
[print_report(Node, Q, [V]) || Q <- ?VHOST_QUERIES, V <- VHosts],
io:format("End of server status report~n"),
ok;
action(eval, Node, [Expr], _Opts, _Inform) ->
case erl_scan:string(Expr) of
{ok, Scanned, _} ->
case erl_parse:parse_exprs(Scanned) of
{ok, Parsed} ->
{value, Value, _} = unsafe_rpc(
Node, erl_eval, exprs, [Parsed, []]),
io:format("~p~n", [Value]),
ok;
{error, E} ->
{error_string, format_parse_error(E)}
end;
{error, E, _} ->
{error_string, format_parse_error(E)}
end.
%%----------------------------------------------------------------------------
wait_for_application(Node, PidFile, Inform) ->
Pid = read_pid_file(PidFile, true),
Inform("pid is ~s", [Pid]),
wait_for_application(Node, Pid).
wait_for_application(Node, Pid) ->
case process_up(Pid) of
true -> case rabbit:is_running(Node) of
true -> ok;
false -> timer:sleep(?EXTERNAL_CHECK_INTERVAL),
wait_for_application(Node, Pid)
end;
false -> {error, process_not_running}
end.
wait_for_process_death(Pid) ->
case process_up(Pid) of
true -> timer:sleep(?EXTERNAL_CHECK_INTERVAL),
wait_for_process_death(Pid);
false -> ok
end.
read_pid_file(PidFile, Wait) ->
case {file:read_file(PidFile), Wait} of
{{ok, Bin}, _} ->
S = string:strip(binary_to_list(Bin), right, $\n),
try list_to_integer(S)
catch error:badarg ->
exit({error, {garbage_in_pid_file, PidFile}})
end,
S;
{{error, enoent}, true} ->
timer:sleep(?EXTERNAL_CHECK_INTERVAL),
read_pid_file(PidFile, Wait);
{{error, _} = E, _} ->
exit({error, {could_not_read_pid, E}})
end.
% Test using some OS clunkiness since we shouldn't trust
% rpc:call(os, getpid, []) at this point
process_up(Pid) ->
with_os([{unix, fun () ->
system("ps -p " ++ Pid
++ " >/dev/null 2>&1") =:= 0
end},
{win32, fun () ->
Res = os:cmd("tasklist /nh /fi \"pid eq " ++
Pid ++ "\" 2>&1"),
case re:run(Res, "erl\\.exe", [{capture, none}]) of
match -> true;
_ -> false
end
end}]).
with_os(Handlers) ->
{OsFamily, _} = os:type(),
case proplists:get_value(OsFamily, Handlers) of
undefined -> throw({unsupported_os, OsFamily});
Handler -> Handler()
end.
% Like system(3)
system(Cmd) ->
ShCmd = "sh -c '" ++ escape_quotes(Cmd) ++ "'",
Port = erlang:open_port({spawn, ShCmd}, [exit_status,nouse_stdio]),
receive {Port, {exit_status, Status}} -> Status end.
% Escape the quotes in a shell command so that it can be used in "sh -c 'cmd'"
escape_quotes(Cmd) ->
lists:flatten(lists:map(fun ($') -> "'\\''"; (Ch) -> Ch end, Cmd)).
format_parse_error({_Line, Mod, Err}) ->
lists:flatten(Mod:format_error(Err)).
%%----------------------------------------------------------------------------
default_if_empty(List, Default) when is_list(List) ->
if List == [] -> Default;
true -> [list_to_atom(X) || X <- List]
end.
display_info_list(Results, InfoItemKeys) when is_list(Results) ->
lists:foreach(
fun (Result) -> display_row(
[format_info_item(proplists:get_value(X, Result)) ||
X <- InfoItemKeys])
end, Results),
ok;
display_info_list(Other, _) ->
Other.
display_row(Row) ->
io:fwrite(string:join(Row, "\t")),
io:nl().
-define(IS_U8(X), (X >= 0 andalso X =< 255)).
-define(IS_U16(X), (X >= 0 andalso X =< 65535)).
format_info_item(#resource{name = Name}) ->
escape(Name);
format_info_item({N1, N2, N3, N4} = Value) when
?IS_U8(N1), ?IS_U8(N2), ?IS_U8(N3), ?IS_U8(N4) ->
rabbit_misc:ntoa(Value);
format_info_item({K1, K2, K3, K4, K5, K6, K7, K8} = Value) when
?IS_U16(K1), ?IS_U16(K2), ?IS_U16(K3), ?IS_U16(K4),
?IS_U16(K5), ?IS_U16(K6), ?IS_U16(K7), ?IS_U16(K8) ->
rabbit_misc:ntoa(Value);
format_info_item(Value) when is_pid(Value) ->
rabbit_misc:pid_to_string(Value);
format_info_item(Value) when is_binary(Value) ->
escape(Value);
format_info_item(Value) when is_atom(Value) ->
escape(atom_to_list(Value));
format_info_item([{TableEntryKey, TableEntryType, _TableEntryValue} | _] =
Value) when is_binary(TableEntryKey) andalso
is_atom(TableEntryType) ->
io_lib:format("~1000000000000p", [prettify_amqp_table(Value)]);
format_info_item([T | _] = Value)
when is_tuple(T) orelse is_pid(T) orelse is_binary(T) orelse is_atom(T) orelse
is_list(T) ->
"[" ++
lists:nthtail(2, lists:append(
[", " ++ format_info_item(E) || E <- Value])) ++ "]";
format_info_item(Value) ->
io_lib:format("~w", [Value]).
display_call_result(Node, MFA) ->
case call(Node, MFA) of
{badrpc, _} = Res -> throw(Res);
Res -> io:format("~p~n", [Res]),
ok
end.
unsafe_rpc(Node, Mod, Fun, Args) ->
case rpc_call(Node, Mod, Fun, Args) of
{badrpc, _} = Res -> throw(Res);
Normal -> Normal
end.
call(Node, {Mod, Fun, Args}) ->
rpc_call(Node, Mod, Fun, lists:map(fun list_to_binary/1, Args)).
rpc_call(Node, Mod, Fun, Args) ->
rpc:call(Node, Mod, Fun, Args, ?RPC_TIMEOUT).
%% escape does C-style backslash escaping of non-printable ASCII
%% characters. We don't escape characters above 127, since they may
%% form part of UTF-8 strings.
escape(Atom) when is_atom(Atom) -> escape(atom_to_list(Atom));
escape(Bin) when is_binary(Bin) -> escape(binary_to_list(Bin));
escape(L) when is_list(L) -> escape_char(lists:reverse(L), []).
escape_char([$\\ | T], Acc) ->
escape_char(T, [$\\, $\\ | Acc]);
escape_char([X | T], Acc) when X >= 32, X /= 127 ->
escape_char(T, [X | Acc]);
escape_char([X | T], Acc) ->
escape_char(T, [$\\, $0 + (X bsr 6), $0 + (X band 8#070 bsr 3),
$0 + (X band 7) | Acc]);
escape_char([], Acc) ->
Acc.
prettify_amqp_table(Table) ->
[{escape(K), prettify_typed_amqp_value(T, V)} || {K, T, V} <- Table].
prettify_typed_amqp_value(longstr, Value) -> escape(Value);
prettify_typed_amqp_value(table, Value) -> prettify_amqp_table(Value);
prettify_typed_amqp_value(array, Value) -> [prettify_typed_amqp_value(T, V) ||
{T, V} <- Value];
prettify_typed_amqp_value(_Type, Value) -> Value.
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