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%% This Source Code Form is subject to the terms of the Mozilla Public
%% License, v. 2.0. If a copy of the MPL was not distributed with this
%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
%%
%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
%%
-module(rabbitmq_peer_discovery_etcd_sup).
-behaviour(supervisor).
-export([init/1, start_link/0]).
-include_lib("rabbit_common/include/rabbit.hrl").
-include("rabbit_peer_discovery_etcd.hrl").
%%
%% API
%%
init([]) ->
Flags = #{strategy => one_for_one, intensity => 10, period => 1},
Fun0 = fun() -> {ok, {Flags, []}} end,
Fun1 = fun() -> {ok, {Flags, []}} end,
Fun2 = fun(_) ->
%% we stop the previously started client and "re-attach" it. MK.
rabbitmq_peer_discovery_etcd_v3_client:stop(),
Formation = application:get_env(rabbit, cluster_formation, []),
Opts = maps:from_list(proplists:get_value(peer_discovery_etcd, Formation, [])),
EtcdClientFSM = #{
id => rabbitmq_peer_discovery_etcd_v3_client,
start => {rabbitmq_peer_discovery_etcd_v3_client, start_link, [Opts]},
restart => permanent,
shutdown => ?SUPERVISOR_WAIT,
type => worker,
modules => [rabbitmq_peer_discovery_etcd_v3_client]
},
Specs = [
EtcdClientFSM
],
{ok, {Flags, Specs}}
end,
rabbit_peer_discovery_util:maybe_backend_configured(?BACKEND_CONFIG_KEY, Fun0, Fun1, Fun2).
start_link() ->
case supervisor:start_link({local, ?MODULE}, ?MODULE, []) of
{ok, Pid} -> {ok, Pid};
{error, {already_started, Pid}} -> {ok, Pid};
{error, _} = Err -> Err
end.
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