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rabbit_common
3.0.2
4.2.1
4.2.0
retired
4.2.0-rc.1
retired
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4.1.5
retired
4.1.5-rc.2
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4.1.5-rc.1
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4.0.3-rc.1
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3.13.0-rc.5
3.13.0-rc.4
3.13.0-rc.3
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3.13.0-rc.1
3.12.14
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3.12.3
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3.12.0-rc.3
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3.11.23
3.11.22
3.11.21
3.11.20
3.11.19
3.11.18
3.11.17
3.11.16
3.11.15
3.11.14
3.11.13
3.11.12
3.11.11
3.11.10
3.11.9
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3.11.6
3.11.5
3.11.4
3.11.3
3.11.2
3.11.1
3.11.0
3.11.0-rc.2
3.11.0-rc.1
3.11.0-1
3.10.25
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3.10.23
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3.10.21
3.10.20
3.10.19
3.10.18
3.10.17
3.10.16
3.10.15
3.10.14
3.10.13
3.10.12
3.10.11
3.10.10
3.10.9
3.10.8
3.10.7
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3.10.5
3.10.4
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3.10.1
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3.10.0-rc.5
3.9.29
3.9.28
3.9.27
3.9.26
3.9.25
3.9.24
3.9.23
3.9.22
3.9.21
3.9.20
3.9.19
3.9.18
3.9.17
3.9.16
3.9.15
3.9.11
3.9.10
3.9.9
3.9.8
3.9.7
3.9.6
3.9.5
3.9.4
3.9.3
3.9.2
3.9.1
3.8.35
3.8.34
3.8.33
3.8.32
3.8.31
3.8.30
3.8.26
3.8.25
3.8.24
3.8.23
3.8.22
3.8.21
3.8.20
3.8.19
3.8.14
3.8.12-rc.3
3.8.12-rc.2
3.8.12-rc.1
3.8.11
3.8.10
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3.8.10-rc.5
3.8.10-rc.1
3.8.9
3.8.8
3.8.7
3.8.6
3.8.6-rc.2
3.8.6-rc.1
3.8.5
3.8.5-rc.2
3.8.5-rc.1
3.8.4
3.8.4-rc.3
3.8.4-rc.1
3.8.3
3.8.3-rc.2
3.8.3-rc.1
3.8.2
3.8.2-rc.1
3.8.1
3.8.1-rc.1
3.8.0
3.8.0-rc.3
3.8.0-rc.2
3.8.0-rc.1
3.7.28
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3.7.27-rc.2
3.7.27-rc.1
3.7.26
3.7.25
3.7.25-rc.1
3.7.24
3.7.24-rc.2
3.7.24-rc.1
3.7.23
3.7.23-rc.1
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3.7.22-rc.1
3.7.21
3.7.20
3.7.20-rc.2
3.7.20-rc.1
3.7.19
3.7.18
3.7.18-rc.1
3.7.17
3.7.17-rc.3
3.7.17-rc.2
3.7.17-rc.1
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3.7.16
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3.7.16-rc.4
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3.7.16-rc.3
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3.7.16-rc.2
retired
3.7.16-rc.1
retired
3.7.16-beta.1
3.7.15
3.7.14
3.7.14-rc.2
3.7.14-rc.1
3.7.13
3.7.13-rc.2
3.7.13-rc.1
3.7.12
3.7.12-rc.2
3.7.12-rc.1
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3.7.11-rc.2
3.7.11-rc.1
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3.7.10-rc.3
3.7.10-rc.2
3.7.10-rc.1
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3.7.9-rc.2
3.7.8
3.7.8-rc.4
3.7.8-rc.3
3.7.8-rc.2
3.7.8-rc.1
3.7.7
3.7.7-rc.2
3.7.7-rc.1
3.7.6
3.7.6-rc.2
3.7.6-rc.1
3.7.5
3.7.5-rc.1
3.7.4
3.7.4-rc.4
3.7.4-rc.3
3.7.4-rc.2
3.7.4-rc.1
3.7.3
3.7.3-rc.2
3.7.3-rc.1
3.7.2
3.7.1
3.7.0-rc.2
3.7.0-alpha.544
3.7.0-alpha.542
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3.6.15-rc.1
3.6.14
3.6.13
3.6.12
3.6.11
3.6.10
3.6.9
3.6.8
3.6.7
3.6.7-pre.1
3.5.6
3.5.0
3.4.0
3.3.5
3.0.2
0.0.0-rc.1
Modules shared by rabbitmq-server and rabbitmq-erlang-client
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Files
src/rabbit_nodes.erl
%% 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) 2007-2013 VMware, Inc. All rights reserved.
%%
-module(rabbit_nodes).
-export([names/1, diagnostics/1, make/1, parts/1, cookie_hash/0, is_running/2]).
-define(EPMD_TIMEOUT, 30000).
%%----------------------------------------------------------------------------
%% Specs
%%----------------------------------------------------------------------------
-ifdef(use_specs).
-spec(names/1 :: (string()) -> rabbit_types:ok_or_error2(
[{string(), integer()}], term())).
-spec(diagnostics/1 :: ([node()]) -> string()).
-spec(make/1 :: ({string(), string()} | string()) -> node()).
-spec(parts/1 :: (node() | string()) -> {string(), string()}).
-spec(cookie_hash/0 :: () -> string()).
-spec(is_running/2 :: (node(), atom()) -> boolean()).
-endif.
%%----------------------------------------------------------------------------
names(Hostname) ->
Self = self(),
Ref = make_ref(),
{Pid, MRef} = spawn_monitor(
fun () -> Self ! {Ref, net_adm:names(Hostname)} end),
timer:exit_after(?EPMD_TIMEOUT, Pid, timeout),
receive
{Ref, Names} -> erlang:demonitor(MRef, [flush]),
Names;
{'DOWN', MRef, process, Pid, Reason} -> {error, Reason}
end.
diagnostics(Nodes) ->
Hosts = lists:usort([element(2, parts(Node)) || Node <- Nodes]),
NodeDiags = [{"~nDIAGNOSTICS~n===========~n~n"
"nodes in question: ~p~n~n"
"hosts, their running nodes and ports:", [Nodes]}] ++
[diagnostics_host(Host) || Host <- Hosts] ++
diagnostics0(),
rabbit_misc:format_many(lists:flatten(NodeDiags)).
diagnostics0() ->
[{"~ncurrent node details:~n- node name: ~w", [node()]},
case init:get_argument(home) of
{ok, [[Home]]} -> {"- home dir: ~s", [Home]};
Other -> {"- no home dir: ~p", [Other]}
end,
{"- cookie hash: ~s", [cookie_hash()]}].
diagnostics_host(Host) ->
case names(Host) of
{error, EpmdReason} ->
{"- unable to connect to epmd on ~s: ~w (~s)",
[Host, EpmdReason, rabbit_misc:format_inet_error(EpmdReason)]};
{ok, NamePorts} ->
{"- ~s: ~p",
[Host, [{list_to_atom(Name), Port} ||
{Name, Port} <- NamePorts]]}
end.
make({Prefix, Suffix}) -> list_to_atom(lists:append([Prefix, "@", Suffix]));
make(NodeStr) -> make(parts(NodeStr)).
parts(Node) when is_atom(Node) ->
parts(atom_to_list(Node));
parts(NodeStr) ->
case lists:splitwith(fun (E) -> E =/= $@ end, NodeStr) of
{Prefix, []} -> {_, Suffix} = parts(node()),
{Prefix, Suffix};
{Prefix, Suffix} -> {Prefix, tl(Suffix)}
end.
cookie_hash() ->
base64:encode_to_string(erlang:md5(atom_to_list(erlang:get_cookie()))).
is_running(Node, Application) ->
case rpc:call(Node, application, which_applications, [infinity]) of
{badrpc, _} -> false;
Apps -> proplists:is_defined(Application, Apps)
end.