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Introduce ranch and add transport callback

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This commit is contained in:
Shunichi Shinohara 2015-11-18 15:16:04 +09:00
parent a8785e44b1
commit 9579b1b8b2
5 changed files with 666 additions and 474 deletions
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1
rebar.config
View file

@ -11,6 +11,7 @@
{lager, ".*", {git, "git://github.com/basho/lager.git", {tag, "2.2.0"}}},
{protobuffs, "0.8.*", {git, "git://github.com/basho/erlang_protobuffs.git", {tag, "0.8.1p4"}}},
{riak_dt, ".*", {git, "git://github.com/basho/riak_dt.git", {branch, "develop"}}},
{ranch, ".*", {git, "git://github.com/ninenines/ranch.git", {branch, "master"}}},
{node_package, ".*", {git, "git://github.com/basho/node_package.git", {branch, "develop"}}},
{eper, ".*", {git, "git://github.com/basho/eper.git", {tag, "0.92-basho1"}}},
{cluster_info, ".*", {git, "git://github.com/basho/cluster_info", {branch, "develop"}}}

465
src/machi_flu1.erl
View file

@ -60,7 +60,8 @@
update_wedge_state/3, wedge_myself/2]).
-export([make_listener_regname/1, make_projection_server_regname/1]).
%% TODO: remove or replace in OTP way after gen_*'ified
-export([main2/4, run_append_server/2, run_listen_server/1,
-export([main2/4, run_append_server/2,
%% run_listen_server/1,
current_state/1, format_state/1]).
-record(state, {
@ -188,27 +189,13 @@ main2(FluName, TcpPort, DataDir, Props) ->
(catch exit(ListenPid, kill)),
ok.
start_listen_server(S) ->
proc_lib:start_link(?MODULE, run_listen_server, [S], ?INIT_TIMEOUT).
start_append_server(S, AckPid) ->
proc_lib:start_link(?MODULE, run_append_server, [AckPid, S], ?INIT_TIMEOUT).
run_listen_server(#state{flu_name=FluName, tcp_port=TcpPort}=S) ->
register(make_listener_regname(FluName), self()),
SockOpts = ?PB_PACKET_OPTS ++
[{reuseaddr, true}, {mode, binary}, {active, false},
{backlog,8192}],
case gen_tcp:listen(TcpPort, SockOpts) of
{ok, LSock} ->
proc_lib:init_ack({ok, self()}),
listen_server_loop(LSock, S);
Else ->
error_logger:warning_msg("~s:run_listen_server: "
"listen to TCP port ~w: ~w\n",
[?MODULE, TcpPort, Else]),
exit({?MODULE, run_listen_server, tcp_port, TcpPort, Else})
end.
start_listen_server(_S) ->
%% FIXMEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
%% proc_lib:start_link(?MODULE, run_listen_server, [S], ?INIT_TIMEOUT).
{ok, dummy}.
run_append_server(FluPid, #state{flu_name=Name,
wedged=Wedged_p,epoch_id=EpochId}=S) ->
@ -220,11 +207,6 @@ run_append_server(FluPid, #state{flu_name=Name,
proc_lib:init_ack({ok, self()}),
append_server_loop(FluPid, S#state{etstab=TID}).
listen_server_loop(LSock, S) ->
{ok, Sock} = gen_tcp:accept(LSock),
spawn_link(fun() -> net_server_loop(Sock, S) end),
listen_server_loop(LSock, S).
append_server_loop(FluPid, #state{wedged=Wedged_p,
witness=Witness_p,
epoch_id=OldEpochId, flu_name=FluName}=S) ->
@ -292,398 +274,6 @@ append_server_loop(FluPid, #state{wedged=Wedged_p,
append_server_loop(FluPid, S)
end.
net_server_loop(Sock, S) ->
case gen_tcp:recv(Sock, 0, ?SERVER_CMD_READ_TIMEOUT) of
{ok, Bin} ->
{RespBin, S2} =
case machi_pb:decode_mpb_ll_request(Bin) of
LL_req when LL_req#mpb_ll_request.do_not_alter == 2 ->
{R, NewS} = do_pb_ll_request(LL_req, S),
{maybe_encode_response(R), mode(low, NewS)};
_ ->
HL_req = machi_pb:decode_mpb_request(Bin),
1 = HL_req#mpb_request.do_not_alter,
{R, NewS} = do_pb_hl_request(HL_req, make_high_clnt(S)),
{machi_pb:encode_mpb_response(R), mode(high, NewS)}
end,
if RespBin == async_no_response ->
net_server_loop(Sock, S2);
true ->
case gen_tcp:send(Sock, RespBin) of
ok ->
net_server_loop(Sock, S2);
{error, _} ->
(catch gen_tcp:close(Sock)),
exit(normal)
end
end;
{error, SockError} ->
Msg = io_lib:format("Socket error ~w", [SockError]),
R = #mpb_ll_response{req_id= <<>>,
generic=#mpb_errorresp{code=1, msg=Msg}},
_Resp = machi_pb:encode_mpb_ll_response(R),
%% TODO: Weird that sometimes neither catch nor try/catch
%% can prevent OTP's SASL from logging an error here.
%% Error in process <0.545.0> with exit value: {badarg,[{erlang,port_command,.......
%% TODO: is this what causes the intermittent PULSE deadlock errors?
%% _ = (catch gen_tcp:send(Sock, _Resp)), timer:sleep(1000),
(catch gen_tcp:close(Sock)),
exit(normal)
end.
maybe_encode_response(async_no_response=X) ->
X;
maybe_encode_response(R) ->
machi_pb:encode_mpb_ll_response(R).
mode(Mode, #state{pb_mode=undefined}=S) ->
S#state{pb_mode=Mode};
mode(_, S) ->
S.
make_high_clnt(#state{high_clnt=undefined}=S) ->
{ok, Proj} = machi_projection_store:read_latest_projection(
S#state.proj_store, private),
Ps = [P_srvr || {_, P_srvr} <- orddict:to_list(
Proj#projection_v1.members_dict)],
{ok, Clnt} = machi_cr_client:start_link(Ps),
S#state{high_clnt=Clnt};
make_high_clnt(S) ->
S.
do_pb_ll_request(#mpb_ll_request{req_id=ReqID}, #state{pb_mode=high}=S) ->
Result = {high_error, 41, "Low protocol request while in high mode"},
{machi_pb_translate:to_pb_response(ReqID, unused, Result), S};
do_pb_ll_request(PB_request, S) ->
Req = machi_pb_translate:from_pb_request(PB_request),
{ReqID, Cmd, Result, S2} =
case Req of
{RqID, {LowCmd, _}=CMD}
when LowCmd == low_proj;
LowCmd == low_wedge_status; LowCmd == low_list_files ->
%% Skip wedge check for projection commands!
%% Skip wedge check for these unprivileged commands
{Rs, NewS} = do_pb_ll_request3(CMD, S),
{RqID, CMD, Rs, NewS};
{RqID, CMD} ->
EpochID = element(2, CMD), % by common convention
{Rs, NewS} = do_pb_ll_request2(EpochID, CMD, S),
{RqID, CMD, Rs, NewS}
end,
{machi_pb_translate:to_pb_response(ReqID, Cmd, Result), S2}.
do_pb_ll_request2(EpochID, CMD, S) ->
{Wedged_p, CurrentEpochID} = ets:lookup_element(S#state.etstab, epoch, 2),
if Wedged_p == true ->
{{error, wedged}, S#state{epoch_id=CurrentEpochID}};
is_tuple(EpochID)
andalso
EpochID /= CurrentEpochID ->
{Epoch, _} = EpochID,
{CurrentEpoch, _} = CurrentEpochID,
if Epoch < CurrentEpoch ->
ok;
true ->
%% We're at same epoch # but different checksum, or
%% we're at a newer/bigger epoch #.
_ = wedge_myself(S#state.flu_name, CurrentEpochID),
ok
end,
{{error, bad_epoch}, S#state{epoch_id=CurrentEpochID}};
true ->
do_pb_ll_request3(CMD, S#state{epoch_id=CurrentEpochID})
end.
%% Witness status does not matter below.
do_pb_ll_request3({low_echo, _BogusEpochID, Msg}, S) ->
{Msg, S};
do_pb_ll_request3({low_auth, _BogusEpochID, _User, _Pass}, S) ->
{-6, S};
do_pb_ll_request3({low_wedge_status, _EpochID}, S) ->
{do_server_wedge_status(S), S};
do_pb_ll_request3({low_proj, PCMD}, S) ->
{do_server_proj_request(PCMD, S), S};
%% Witness status *matters* below
do_pb_ll_request3({low_append_chunk, _EpochID, CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag,
CSum, ChunkExtra},
#state{witness=false}=S) ->
{do_server_append_chunk(CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag, CSum,
ChunkExtra, S), S};
do_pb_ll_request3({low_write_chunk, _EpochID, File, Offset, Chunk, CSum_tag,
CSum},
#state{witness=false}=S) ->
{do_server_write_chunk(File, Offset, Chunk, CSum_tag, CSum, S), S};
do_pb_ll_request3({low_read_chunk, _EpochID, File, Offset, Size, Opts},
#state{witness=false} = S) ->
{do_server_read_chunk(File, Offset, Size, Opts, S), S};
do_pb_ll_request3({low_trim_chunk, _EpochID, File, Offset, Size, TriggerGC},
#state{witness=false}=S) ->
{do_server_trim_chunk(File, Offset, Size, TriggerGC, S), S};
do_pb_ll_request3({low_checksum_list, _EpochID, File},
#state{witness=false}=S) ->
{do_server_checksum_listing(File, S), S};
do_pb_ll_request3({low_list_files, _EpochID},
#state{witness=false}=S) ->
{do_server_list_files(S), S};
do_pb_ll_request3({low_delete_migration, _EpochID, File},
#state{witness=false}=S) ->
{do_server_delete_migration(File, S),
#state{witness=false}=S};
do_pb_ll_request3({low_trunc_hack, _EpochID, File},
#state{witness=false}=S) ->
{do_server_trunc_hack(File, S), S};
do_pb_ll_request3(_, #state{witness=true}=S) ->
{{error, bad_arg}, S}. % TODO: new status code??
do_pb_hl_request(#mpb_request{req_id=ReqID}, #state{pb_mode=low}=S) ->
Result = {low_error, 41, "High protocol request while in low mode"},
{machi_pb_translate:to_pb_response(ReqID, unused, Result), S};
do_pb_hl_request(PB_request, S) ->
{ReqID, Cmd} = machi_pb_translate:from_pb_request(PB_request),
{Result, S2} = do_pb_hl_request2(Cmd, S),
{machi_pb_translate:to_pb_response(ReqID, Cmd, Result), S2}.
do_pb_hl_request2({high_echo, Msg}, S) ->
{Msg, S};
do_pb_hl_request2({high_auth, _User, _Pass}, S) ->
{-77, S};
do_pb_hl_request2({high_append_chunk, CoC_Namespace, CoC_Locator,
Prefix, ChunkBin, TaggedCSum,
ChunkExtra}, #state{high_clnt=Clnt}=S) ->
Chunk = {TaggedCSum, ChunkBin},
Res = machi_cr_client:append_chunk_extra(Clnt, CoC_Namespace, CoC_Locator,
Prefix, Chunk,
ChunkExtra),
{Res, S};
do_pb_hl_request2({high_write_chunk, File, Offset, ChunkBin, TaggedCSum},
#state{high_clnt=Clnt}=S) ->
Chunk = {TaggedCSum, ChunkBin},
Res = machi_cr_client:write_chunk(Clnt, File, Offset, Chunk),
{Res, S};
do_pb_hl_request2({high_read_chunk, File, Offset, Size, Opts},
#state{high_clnt=Clnt}=S) ->
Res = machi_cr_client:read_chunk(Clnt, File, Offset, Size, Opts),
{Res, S};
do_pb_hl_request2({high_trim_chunk, File, Offset, Size},
#state{high_clnt=Clnt}=S) ->
Res = machi_cr_client:trim_chunk(Clnt, File, Offset, Size),
{Res, S};
do_pb_hl_request2({high_checksum_list, File}, #state{high_clnt=Clnt}=S) ->
Res = machi_cr_client:checksum_list(Clnt, File),
{Res, S};
do_pb_hl_request2({high_list_files}, #state{high_clnt=Clnt}=S) ->
Res = machi_cr_client:list_files(Clnt),
{Res, S}.
do_server_proj_request({get_latest_epochid, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:get_latest_epochid(ProjStore, ProjType);
do_server_proj_request({read_latest_projection, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:read_latest_projection(ProjStore, ProjType);
do_server_proj_request({read_projection, ProjType, Epoch},
#state{proj_store=ProjStore}) ->
machi_projection_store:read(ProjStore, ProjType, Epoch);
do_server_proj_request({write_projection, ProjType, Proj},
#state{flu_name=FluName, proj_store=ProjStore}) ->
if Proj#projection_v1.epoch_number == ?SPAM_PROJ_EPOCH ->
%% io:format(user, "DBG ~s ~w ~P\n", [?MODULE, ?LINE, Proj, 5]),
Chmgr = machi_flu_psup:make_fitness_regname(FluName),
[Map] = Proj#projection_v1.dbg,
catch machi_fitness:send_fitness_update_spam(
Chmgr, Proj#projection_v1.author_server, Map);
true ->
catch machi_projection_store:write(ProjStore, ProjType, Proj)
end;
do_server_proj_request({get_all_projections, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:get_all_projections(ProjStore, ProjType);
do_server_proj_request({list_all_projections, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:list_all_projections(ProjStore, ProjType);
do_server_proj_request({kick_projection_reaction},
#state{flu_name=FluName}) ->
%% Tell my chain manager that it might want to react to
%% this new world.
Chmgr = machi_chain_manager1:make_chmgr_regname(FluName),
spawn(fun() ->
catch machi_chain_manager1:trigger_react_to_env(Chmgr)
end),
async_no_response.
do_server_append_chunk(CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag, CSum,
ChunkExtra, S) ->
case sanitize_prefix(Prefix) of
ok ->
do_server_append_chunk2(CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag, CSum,
ChunkExtra, S);
_ ->
{error, bad_arg}
end.
do_server_append_chunk2(CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag, Client_CSum,
ChunkExtra, #state{flu_name=FluName,
epoch_id=EpochID}=_S) ->
%% TODO: Do anything with PKey?
try
TaggedCSum = check_or_make_tagged_checksum(CSum_tag, Client_CSum,Chunk),
R = {seq_append, self(), CoC_Namespace, CoC_Locator,
Prefix, Chunk, TaggedCSum, ChunkExtra, EpochID},
FluName ! R,
receive
{assignment, Offset, File} ->
Size = iolist_size(Chunk),
{ok, {Offset, Size, File}};
witness ->
{error, bad_arg};
wedged ->
{error, wedged}
after 10*1000 ->
{error, partition}
end
catch
throw:{bad_csum, _CS} ->
{error, bad_checksum};
error:badarg ->
error_logger:error_msg("Message send to ~p gave badarg, make certain server is running with correct registered name\n", [?MODULE]),
{error, bad_arg}
end.
do_server_write_chunk(File, Offset, Chunk, CSum_tag, CSum, #state{flu_name=FluName}) ->
case sanitize_file_string(File) of
ok ->
case machi_flu_metadata_mgr:start_proxy_pid(FluName, {file, File}) of
{ok, Pid} ->
Meta = [{client_csum_tag, CSum_tag}, {client_csum, CSum}],
machi_file_proxy:write(Pid, Offset, Meta, Chunk);
{error, trimmed} = Error ->
Error
end;
_ ->
{error, bad_arg}
end.
do_server_read_chunk(File, Offset, Size, Opts, #state{flu_name=FluName})->
case sanitize_file_string(File) of
ok ->
case machi_flu_metadata_mgr:start_proxy_pid(FluName, {file, File}) of
{ok, Pid} ->
case machi_file_proxy:read(Pid, Offset, Size, Opts) of
%% XXX FIXME
%% For now we are omiting the checksum data because it blows up
%% protobufs.
{ok, ChunksAndTrimmed} -> {ok, ChunksAndTrimmed};
Other -> Other
end;
{error, trimmed} = Error ->
Error
end;
_ ->
{error, bad_arg}
end.
do_server_trim_chunk(File, Offset, Size, TriggerGC, #state{flu_name=FluName}) ->
lager:debug("Hi there! I'm trimming this: ~s, (~p, ~p), ~p~n",
[File, Offset, Size, TriggerGC]),
case sanitize_file_string(File) of
ok ->
case machi_flu_metadata_mgr:start_proxy_pid(FluName, {file, File}) of
{ok, Pid} ->
machi_file_proxy:trim(Pid, Offset, Size, TriggerGC);
{error, trimmed} = Trimmed ->
%% Should be returned back to (maybe) trigger repair
Trimmed
end;
_ ->
{error, bad_arg}
end.
do_server_checksum_listing(File, #state{flu_name=FluName, data_dir=DataDir}=_S) ->
case sanitize_file_string(File) of
ok ->
case machi_flu_metadata_mgr:start_proxy_pid(FluName, {file, File}) of
{ok, Pid} ->
{ok, List} = machi_file_proxy:checksum_list(Pid),
Bin = erlang:term_to_binary(List),
if byte_size(Bin) > (?PB_MAX_MSG_SIZE - 1024) ->
%% TODO: Fix this limitation by streaming the
%% binary in multiple smaller PB messages.
%% Also, don't read the file all at once. ^_^
error_logger:error_msg("~s:~w oversize ~s\n",
[?MODULE, ?LINE, DataDir]),
{error, bad_arg};
true ->
{ok, Bin}
end;
{error, trimmed} ->
{error, trimmed}
end;
_ ->
{error, bad_arg}
end.
do_server_list_files(#state{data_dir=DataDir}=_S) ->
{_, WildPath} = machi_util:make_data_filename(DataDir, ""),
Files = filelib:wildcard("*", WildPath),
{ok, [begin
{ok, FI} = file:read_file_info(WildPath ++ "/" ++ File),
Size = FI#file_info.size,
{Size, File}
end || File <- Files]}.
do_server_wedge_status(S) ->
{Wedged_p, CurrentEpochID0} = ets:lookup_element(S#state.etstab, epoch, 2),
CurrentEpochID = if CurrentEpochID0 == undefined ->
?DUMMY_PV1_EPOCH;
true ->
CurrentEpochID0
end,
{Wedged_p, CurrentEpochID}.
do_server_delete_migration(File, #state{data_dir=DataDir}=_S) ->
case sanitize_file_string(File) of
ok ->
{_, Path} = machi_util:make_data_filename(DataDir, File),
case file:delete(Path) of
ok ->
ok;
{error, enoent} ->
{error, no_such_file};
_ ->
{error, bad_arg}
end;
_ ->
{error, bad_arg}
end.
do_server_trunc_hack(File, #state{data_dir=DataDir}=_S) ->
case sanitize_file_string(File) of
ok ->
{_, Path} = machi_util:make_data_filename(DataDir, File),
case file:open(Path, [read, write, binary, raw]) of
{ok, FH} ->
try
{ok, ?MINIMUM_OFFSET} = file:position(FH,
?MINIMUM_OFFSET),
ok = file:truncate(FH),
ok
after
file:close(FH)
end;
{error, enoent} ->
{error, no_such_file};
_ ->
{error, bad_arg}
end;
_ ->
{error, bad_arg}
end.
append_server_dispatch(From, CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum, Extra, FluName, EpochId) ->
Result = case handle_append(CoC_Namespace, CoC_Locator,
@ -717,29 +307,6 @@ handle_append(CoC_Namespace, CoC_Locator,
Error
end.
sanitize_file_string(Str) ->
case has_no_prohibited_chars(Str) andalso machi_util:is_valid_filename(Str) of
true -> ok;
false -> error
end.
has_no_prohibited_chars(Str) ->
case re:run(Str, "/") of
nomatch ->
true;
_ ->
true
end.
sanitize_prefix(Prefix) ->
%% We are using '^' as our component delimiter
case re:run(Prefix, "/|\\^") of
nomatch ->
ok;
_ ->
error
end.
make_listener_regname(BaseName) ->
list_to_atom(atom_to_list(BaseName) ++ "_listener").
@ -753,26 +320,6 @@ make_listener_regname(BaseName) ->
make_projection_server_regname(BaseName) ->
list_to_atom(atom_to_list(BaseName) ++ "_pstore").
check_or_make_tagged_checksum(?CSUM_TAG_NONE, _Client_CSum, Chunk) ->
%% TODO: If the client was foolish enough to use
%% this type of non-checksum, then the client gets
%% what it deserves wrt data integrity, alas. In
%% the client-side Chain Replication method, each
%% server will calculated this independently, which
%% isn't exactly what ought to happen for best data
%% integrity checking. In server-side CR, the csum
%% should be calculated by the head and passed down
%% the chain together with the value.
CS = machi_util:checksum_chunk(Chunk),
machi_util:make_tagged_csum(server_sha, CS);
check_or_make_tagged_checksum(?CSUM_TAG_CLIENT_SHA, Client_CSum, Chunk) ->
CS = machi_util:checksum_chunk(Chunk),
if CS == Client_CSum ->
machi_util:make_tagged_csum(server_sha,
Client_CSum);
true ->
throw({bad_csum, CS})
end.
-ifdef(TEST).

13
src/machi_flu_psup.erl
View file

@ -143,16 +143,21 @@ init([FluName, TcpPort, DataDir, Props0]) ->
FProxySupSpec = machi_file_proxy_sup:child_spec(FluName),
ListenerRegName = machi_flu1:make_listener_regname(FluName),
NbAcceptors = 100,
ListenerSpec = ranch:child_spec(ListenerRegName, NbAcceptors,
ranch_tcp, [{port, TcpPort}],
machi_pb_protocol, []),
FluSpec = {FluName,
{machi_flu1, start_link,
[ [{FluName, TcpPort, DataDir}|Props] ]},
[ [{FluName, TcpPort+1, DataDir}|Props] ]},
permanent, ?SHUTDOWN, worker, []},
{ok, {SupFlags, [
ProjSpec, FitnessSpec, MgrSpec,
FProxySupSpec, FNameMgrSpec, MetaSupSpec,
FluSpec]}}.
ProjSpec, FitnessSpec, MgrSpec,
FProxySupSpec, FNameMgrSpec, MetaSupSpec,
FluSpec, ListenerSpec]}}.
make_flu_regname(FluName) when is_atom(FluName) ->
FluName.

645
src/machi_pb_protocol.erl Normal file
View file

@ -0,0 +1,645 @@
%% -------------------------------------------------------------------
%%
%% Copyright (c) 2007-2015 Basho Technologies, Inc. All Rights Reserved.
%%
%% This file is provided to you under the Apache License,
%% Version 2.0 (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.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied. See the License for the
%% specific language governing permissions and limitations
%% under the License.
%%
%% -------------------------------------------------------------------
%% @doc Ranch protocol callback module to handle PB protocol over
%% transport
%% TODO
%% - Two modes, high and low should be separated at listener level?
-module(machi_pb_protocol).
-behaviour(gen_server).
-behaviour(ranch_protocol).
-export([start_link/4]).
-export([init/1]).
-export([handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-include("machi.hrl").
-include("machi_pb.hrl").
-include("machi_projection.hrl").
-define(V(X,Y), ok).
%% -include("machi_verbose.hrl").
-ifdef(TEST).
-include_lib("eunit/include/eunit.hrl").
-endif. % TEST
-record(state, {ref,
socket,
transport,
opts,
pb_mode,
data_dir,
witness,
%% - Used in projection related requests in low mode
%% - Used in spawning CR client in high mode
proj_store,
%%%% Low mode only
%% Current best knowledge, used for wedge_self / bad_epoch check
epoch_id,
%% Used in dispatching append_chunk* reqs to the
%% append serializing process
flu_name,
%% Stored in ETS before factorization, can be stored in the recored?
wedged,
%% Used in server_wedge_status to lookup the table
etstab,
%%%% High mode only
high_clnt,
%%%% to be removed
eof
}).
%% -record(state, {
%% used in append serializer to trigger chain mgr react_to_env
%% flu_name :: atom(),
%% proj_store :: pid(),
%% witness = false :: boolean(),
%% append_pid :: pid(),
%% tcp_port :: non_neg_integer(),
%% data_dir :: string(),
%% wedged = true :: boolean(),
%% etstab :: ets:tid(),
%% epoch_id :: 'undefined' | machi_dt:epoch_id(),
%% pb_mode = undefined :: 'undefined' | 'high' | 'low',
%% high_clnt :: 'undefined' | pid(),
%% trim_table :: ets:tid(),
%% props = [] :: list() % proplist
%% }).
-spec start_link(ranch:ref(), any(), module(), any()) -> {ok, pid()}.
start_link(Ref, Socket, Transport, Opts) ->
proc_lib:start_link(?MODULE, init, [#state{ref=Ref, socket=Socket,
transport=Transport,
opts=Opts}]).
init(#state{ref=Ref, socket=Socket, transport=Transport, opts=_Opts}=State) ->
ok = proc_lib:init_ack({ok, self()}),
%% TODO: Perform any required state initialization here.
ok = ranch:accept_ack(Ref),
ok = Transport:setopts(Socket, [{active, once}]),
gen_server:enter_loop(?MODULE, [], State).
handle_call(Request, _From, S) ->
Reply = {error, {unknown_message, Request}},
{reply, Reply, S}.
handle_cast(_Msg, S) ->
io:format(user, "~s:handle_cast: ~p\n", [?MODULE, _Msg]),
{noreply, S}.
handle_info({tcp, Sock, Data}=_Info, S) ->
io:format(user, "~s:handle_info: ~p\n", [?MODULE, _Info]),
transport_received(Sock, Data, S);
handle_info({tcp_closed, Sock}=_Info, S) ->
io:format(user, "~s:handle_info: ~p\n", [?MODULE, _Info]),
transport_closed(Sock, S);
handle_info({tcp_error, Sock, Reason}=_Info, S) ->
io:format(user, "~s:handle_info: ~p\n", [?MODULE, _Info]),
transport_error(Sock, Reason, S);
handle_info(_Info, S) ->
io:format(user, "~s:handle_info: ~p\n", [?MODULE, _Info]),
{noreply, S}.
terminate(_Reason, _S) ->
io:format(user, "~s:terminate: ~p\n", [?MODULE, _Reason]),
ok.
code_change(_OldVsn, S, _Extra) ->
{ok, S}.
%% Internal functions, or copy-n-paste'd thingie
%%%% Just copied and will be removed %%%%
%% TODO: sock opts should be migrated to ranch equivalent
%% run_listen_server(#state{flu_name=FluName, tcp_port=TcpPort}=S) ->
%% register(make_listener_regname(FluName), self()),
%% SockOpts = ?PB_PACKET_OPTS ++
%% [{reuseaddr, true}, {mode, binary}, {active, false},
%% {backlog,8192}],
%% case gen_tcp:listen(TcpPort, SockOpts) of
%% {ok, LSock} ->
%% proc_lib:init_ack({ok, self()}),
%% listen_server_loop(LSock, S);
%% Else ->
%% error_logger:warning_msg("~s:run_listen_server: "
%% "listen to TCP port ~w: ~w\n",
%% [?MODULE, TcpPort, Else]),
%% exit({?MODULE, run_listen_server, tcp_port, TcpPort, Else})
%% end.
%% listen_server_loop(LSock, S) ->
%% {ok, Sock} = gen_tcp:accept(LSock),
%% spawn_link(fun() -> net_server_loop(Sock, S) end),
%% listen_server_loop(LSock, S).
%% net_server_loop(Sock, S) ->
%% case gen_tcp:recv(Sock, 0, ?SERVER_CMD_READ_TIMEOUT) of
%% {ok, Bin} ->
%% {RespBin, S2} =
%% case machi_pb:decode_mpb_ll_request(Bin) of
%% LL_req when LL_req#mpb_ll_request.do_not_alter == 2 ->
%% {R, NewS} = do_pb_ll_request(LL_req, S),
%% {maybe_encode_response(R), mode(low, NewS)};
%% _ ->
%% HL_req = machi_pb:decode_mpb_request(Bin),
%% 1 = HL_req#mpb_request.do_not_alter,
%% {R, NewS} = do_pb_hl_request(HL_req, make_high_clnt(S)),
%% {machi_pb:encode_mpb_response(R), mode(high, NewS)}
%% end,
%% if RespBin == async_no_response ->
%% net_server_loop(Sock, S2);
%% true ->
%% case gen_tcp:send(Sock, RespBin) of
%% ok ->
%% net_server_loop(Sock, S2);
%% {error, _} ->
%% (catch gen_tcp:close(Sock)),
%% exit(normal)
%% end
%% end;
%% {error, SockError} ->
%% Msg = io_lib:format("Socket error ~w", [SockError]),
%% R = #mpb_ll_response{req_id= <<>>,
%% generic=#mpb_errorresp{code=1, msg=Msg}},
%% _Resp = machi_pb:encode_mpb_ll_response(R),
%% %% TODO: Weird that sometimes neither catch nor try/catch
%% %% can prevent OTP's SASL from logging an error here.
%% %% Error in process <0.545.0> with exit value: {badarg,[{erlang,port_command,.......
%% %% TODO: is this what causes the intermittent PULSE deadlock errors?
%% %% _ = (catch gen_tcp:send(Sock, _Resp)), timer:sleep(1000),
%% (catch gen_tcp:close(Sock)),
%% exit(normal)
%% end.
%%%% Common transport handling
transport_received(Sock, Bin, #state{transport=Transport}=S) ->
{RespBin, S2} =
case machi_pb:decode_mpb_ll_request(Bin) of
LL_req when LL_req#mpb_ll_request.do_not_alter == 2 ->
{R, NewS} = do_pb_ll_request(LL_req, S),
{maybe_encode_response(R), mode(low, NewS)};
_ ->
HL_req = machi_pb:decode_mpb_request(Bin),
1 = HL_req#mpb_request.do_not_alter,
{R, NewS} = do_pb_hl_request(HL_req, make_high_clnt(S)),
{machi_pb:encode_mpb_response(R), mode(high, NewS)}
end,
if RespBin == async_no_response ->
{noreply, S2};
true ->
case Transport:send(Sock, RespBin) of
ok ->
{noreply, S2};
{error, Reason} ->
transport_error(Sock, Reason, S2)
end
end.
transport_closed(Sock, S) ->
(catch gen_tcp:close(Sock)),
{stop, normal, S#state{sock=undefined}}.
transport_error(Sock, Reason, S) ->
Msg = io_lib:format("Socket error ~w", [SockError]),
R = #mpb_ll_response{req_id= <<>>,
generic=#mpb_errorresp{code=1, msg=Msg}},
_Resp = machi_pb:encode_mpb_ll_response(R),
%% TODO of TODO comments: comments below with four %s are copy-n-paste'd,
%% then it should be considered they are still open and should be addressed.
%%%% TODO: Weird that sometimes neither catch nor try/catch
%%%% can prevent OTP's SASL from logging an error here.
%%%% Error in process <0.545.0> with exit value: {badarg,[{erlang,port_command,.......
%%%% TODO: is this what causes the intermittent PULSE deadlock errors?
%%%% _ = (catch gen_tcp:send(Sock, _Resp)), timer:sleep(1000),
(catch gen_tcp:close(Sock)),
%% TODO: better to exit with `Reason'?
exit(normal).
maybe_encode_response(async_no_response=X) ->
X;
maybe_encode_response(R) ->
machi_pb:encode_mpb_ll_response(R).
%%%% Not categorized / not-yet-well-understood items
%% TODO: may be external API
mode(Mode, #state{pb_mode=undefined}=S) ->
S#state{pb_mode=Mode};
mode(_, S) ->
S.
%%%% Low PB mode %%%%
do_pb_ll_request(#mpb_ll_request{req_id=ReqID}, #state{pb_mode=high}=S) ->
Result = {high_error, 41, "Low protocol request while in high mode"},
{machi_pb_translate:to_pb_response(ReqID, unused, Result), S};
do_pb_ll_request(PB_request, S) ->
Req = machi_pb_translate:from_pb_request(PB_request),
{ReqID, Cmd, Result, S2} =
case Req of
{RqID, {LowCmd, _}=CMD}
when LowCmd == low_proj;
LowCmd == low_wedge_status; LowCmd == low_list_files ->
%% Skip wedge check for projection commands!
%% Skip wedge check for these unprivileged commands
{Rs, NewS} = do_pb_ll_request3(CMD, S),
{RqID, CMD, Rs, NewS};
{RqID, CMD} ->
EpochID = element(2, CMD), % by common convention
{Rs, NewS} = do_pb_ll_request2(EpochID, CMD, S),
{RqID, CMD, Rs, NewS}
end,
{machi_pb_translate:to_pb_response(ReqID, Cmd, Result), S2}.
do_pb_ll_request2(EpochID, CMD, S) ->
{Wedged_p, CurrentEpochID} = ets:lookup_element(S#state.etstab, epoch, 2),
if Wedged_p == true ->
{{error, wedged}, S#state{epoch_id=CurrentEpochID}};
is_tuple(EpochID)
andalso
EpochID /= CurrentEpochID ->
{Epoch, _} = EpochID,
{CurrentEpoch, _} = CurrentEpochID,
if Epoch < CurrentEpoch ->
ok;
true ->
%% We're at same epoch # but different checksum, or
%% we're at a newer/bigger epoch #.
_ = wedge_myself(S#state.flu_name, CurrentEpochID),
ok
end,
{{error, bad_epoch}, S#state{epoch_id=CurrentEpochID}};
true ->
do_pb_ll_request3(CMD, S#state{epoch_id=CurrentEpochID})
end.
%% Witness status does not matter below.
do_pb_ll_request3({low_echo, _BogusEpochID, Msg}, S) ->
{Msg, S};
do_pb_ll_request3({low_auth, _BogusEpochID, _User, _Pass}, S) ->
{-6, S};
do_pb_ll_request3({low_wedge_status, _EpochID}, S) ->
{do_server_wedge_status(S), S};
do_pb_ll_request3({low_proj, PCMD}, S) ->
{do_server_proj_request(PCMD, S), S};
%% Witness status *matters* below
do_pb_ll_request3({low_append_chunk, _EpochID, CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag,
CSum, ChunkExtra},
#state{witness=false}=S) ->
{do_server_append_chunk(CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag, CSum,
ChunkExtra, S), S};
do_pb_ll_request3({low_write_chunk, _EpochID, File, Offset, Chunk, CSum_tag,
CSum},
#state{witness=false}=S) ->
{do_server_write_chunk(File, Offset, Chunk, CSum_tag, CSum, S), S};
do_pb_ll_request3({low_read_chunk, _EpochID, File, Offset, Size, Opts},
#state{witness=false} = S) ->
{do_server_read_chunk(File, Offset, Size, Opts, S), S};
do_pb_ll_request3({low_trim_chunk, _EpochID, File, Offset, Size, TriggerGC},
#state{witness=false}=S) ->
{do_server_trim_chunk(File, Offset, Size, TriggerGC, S), S};
do_pb_ll_request3({low_checksum_list, _EpochID, File},
#state{witness=false}=S) ->
{do_server_checksum_listing(File, S), S};
do_pb_ll_request3({low_list_files, _EpochID},
#state{witness=false}=S) ->
{do_server_list_files(S), S};
do_pb_ll_request3({low_delete_migration, _EpochID, File},
#state{witness=false}=S) ->
{do_server_delete_migration(File, S),
#state{witness=false}=S};
do_pb_ll_request3({low_trunc_hack, _EpochID, File},
#state{witness=false}=S) ->
{do_server_trunc_hack(File, S), S};
do_pb_ll_request3(_, #state{witness=true}=S) ->
{{error, bad_arg}, S}. % TODO: new status code??
do_server_proj_request({get_latest_epochid, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:get_latest_epochid(ProjStore, ProjType);
do_server_proj_request({read_latest_projection, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:read_latest_projection(ProjStore, ProjType);
do_server_proj_request({read_projection, ProjType, Epoch},
#state{proj_store=ProjStore}) ->
machi_projection_store:read(ProjStore, ProjType, Epoch);
do_server_proj_request({write_projection, ProjType, Proj},
#state{flu_name=FluName, proj_store=ProjStore}) ->
if Proj#projection_v1.epoch_number == ?SPAM_PROJ_EPOCH ->
%% io:format(user, "DBG ~s ~w ~P\n", [?MODULE, ?LINE, Proj, 5]),
Chmgr = machi_flu_psup:make_fitness_regname(FluName),
[Map] = Proj#projection_v1.dbg,
catch machi_fitness:send_fitness_update_spam(
Chmgr, Proj#projection_v1.author_server, Map);
true ->
catch machi_projection_store:write(ProjStore, ProjType, Proj)
end;
do_server_proj_request({get_all_projections, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:get_all_projections(ProjStore, ProjType);
do_server_proj_request({list_all_projections, ProjType},
#state{proj_store=ProjStore}) ->
machi_projection_store:list_all_projections(ProjStore, ProjType);
do_server_proj_request({kick_projection_reaction},
#state{flu_name=FluName}) ->
%% Tell my chain manager that it might want to react to
%% this new world.
Chmgr = machi_chain_manager1:make_chmgr_regname(FluName),
spawn(fun() ->
catch machi_chain_manager1:trigger_react_to_env(Chmgr)
end),
async_no_response.
do_server_append_chunk(CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag, CSum,
ChunkExtra, S) ->
case sanitize_prefix(Prefix) of
ok ->
do_server_append_chunk2(CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag, CSum,
ChunkExtra, S);
_ ->
{error, bad_arg}
end.
do_server_append_chunk2(CoC_Namespace, CoC_Locator,
Prefix, Chunk, CSum_tag, Client_CSum,
ChunkExtra, #state{flu_name=FluName,
epoch_id=EpochID}=_S) ->
%% TODO: Do anything with PKey?
try
TaggedCSum = check_or_make_tagged_checksum(CSum_tag, Client_CSum,Chunk),
R = {seq_append, self(), CoC_Namespace, CoC_Locator,
Prefix, Chunk, TaggedCSum, ChunkExtra, EpochID},
FluName ! R,
receive
{assignment, Offset, File} ->
Size = iolist_size(Chunk),
{ok, {Offset, Size, File}};
witness ->
{error, bad_arg};
wedged ->
{error, wedged}
after 10*1000 ->
{error, partition}
end
catch
throw:{bad_csum, _CS} ->
{error, bad_checksum};
error:badarg ->
error_logger:error_msg("Message send to ~p gave badarg, make certain server is running with correct registered name\n", [?MODULE]),
{error, bad_arg}
end.
do_server_write_chunk(File, Offset, Chunk, CSum_tag, CSum, #state{flu_name=FluName}) ->
case sanitize_file_string(File) of
ok ->
case machi_flu_metadata_mgr:start_proxy_pid(FluName, {file, File}) of
{ok, Pid} ->
Meta = [{client_csum_tag, CSum_tag}, {client_csum, CSum}],
machi_file_proxy:write(Pid, Offset, Meta, Chunk);
{error, trimmed} = Error ->
Error
end;
_ ->
{error, bad_arg}
end.
do_server_read_chunk(File, Offset, Size, Opts, #state{flu_name=FluName})->
case sanitize_file_string(File) of
ok ->
case machi_flu_metadata_mgr:start_proxy_pid(FluName, {file, File}) of
{ok, Pid} ->
case machi_file_proxy:read(Pid, Offset, Size, Opts) of
%% XXX FIXME
%% For now we are omiting the checksum data because it blows up
%% protobufs.
{ok, ChunksAndTrimmed} -> {ok, ChunksAndTrimmed};
Other -> Other
end;
{error, trimmed} = Error ->
Error
end;
_ ->
{error, bad_arg}
end.
do_server_trim_chunk(File, Offset, Size, TriggerGC, #state{flu_name=FluName}) ->
lager:debug("Hi there! I'm trimming this: ~s, (~p, ~p), ~p~n",
[File, Offset, Size, TriggerGC]),
case sanitize_file_string(File) of
ok ->
case machi_flu_metadata_mgr:start_proxy_pid(FluName, {file, File}) of
{ok, Pid} ->
machi_file_proxy:trim(Pid, Offset, Size, TriggerGC);
{error, trimmed} = Trimmed ->
%% Should be returned back to (maybe) trigger repair
Trimmed
end;
_ ->
{error, bad_arg}
end.
do_server_checksum_listing(File, #state{flu_name=FluName, data_dir=DataDir}=_S) ->
case sanitize_file_string(File) of
ok ->
case machi_flu_metadata_mgr:start_proxy_pid(FluName, {file, File}) of
{ok, Pid} ->
{ok, List} = machi_file_proxy:checksum_list(Pid),
Bin = erlang:term_to_binary(List),
if byte_size(Bin) > (?PB_MAX_MSG_SIZE - 1024) ->
%% TODO: Fix this limitation by streaming the
%% binary in multiple smaller PB messages.
%% Also, don't read the file all at once. ^_^
error_logger:error_msg("~s:~w oversize ~s\n",
[?MODULE, ?LINE, DataDir]),
{error, bad_arg};
true ->
{ok, Bin}
end;
{error, trimmed} ->
{error, trimmed}
end;
_ ->
{error, bad_arg}
end.
do_server_list_files(#state{data_dir=DataDir}=_S) ->
{_, WildPath} = machi_util:make_data_filename(DataDir, ""),
Files = filelib:wildcard("*", WildPath),
{ok, [begin
{ok, FI} = file:read_file_info(WildPath ++ "/" ++ File),
Size = FI#file_info.size,
{Size, File}
end || File <- Files]}.
do_server_wedge_status(S) ->
{Wedged_p, CurrentEpochID0} = ets:lookup_element(S#state.etstab, epoch, 2),
CurrentEpochID = if CurrentEpochID0 == undefined ->
?DUMMY_PV1_EPOCH;
true ->
CurrentEpochID0
end,
{Wedged_p, CurrentEpochID}.
do_server_delete_migration(File, #state{data_dir=DataDir}=_S) ->
case sanitize_file_string(File) of
ok ->
{_, Path} = machi_util:make_data_filename(DataDir, File),
case file:delete(Path) of
ok ->
ok;
{error, enoent} ->
{error, no_such_file};
_ ->
{error, bad_arg}
end;
_ ->
{error, bad_arg}
end.
do_server_trunc_hack(File, #state{data_dir=DataDir}=_S) ->
case sanitize_file_string(File) of
ok ->
{_, Path} = machi_util:make_data_filename(DataDir, File),
case file:open(Path, [read, write, binary, raw]) of
{ok, FH} ->
try
{ok, ?MINIMUM_OFFSET} = file:position(FH,
?MINIMUM_OFFSET),
ok = file:truncate(FH),
ok
after
file:close(FH)
end;
{error, enoent} ->
{error, no_such_file};
_ ->
{error, bad_arg}
end;
_ ->
{error, bad_arg}
end.
sanitize_file_string(Str) ->
case has_no_prohibited_chars(Str) andalso machi_util:is_valid_filename(Str) of
true -> ok;
false -> error
end.
has_no_prohibited_chars(Str) ->
case re:run(Str, "/") of
nomatch ->
true;
_ ->
true
end.
sanitize_prefix(Prefix) ->
%% We are using '^' as our component delimiter
case re:run(Prefix, "/|\\^") of
nomatch ->
ok;
_ ->
error
end.
check_or_make_tagged_checksum(?CSUM_TAG_NONE, _Client_CSum, Chunk) ->
%% TODO: If the client was foolish enough to use
%% this type of non-checksum, then the client gets
%% what it deserves wrt data integrity, alas. In
%% the client-side Chain Replication method, each
%% server will calculated this independently, which
%% isn't exactly what ought to happen for best data
%% integrity checking. In server-side CR, the csum
%% should be calculated by the head and passed down
%% the chain together with the value.
CS = machi_util:checksum_chunk(Chunk),
machi_util:make_tagged_csum(server_sha, CS);
check_or_make_tagged_checksum(?CSUM_TAG_CLIENT_SHA, Client_CSum, Chunk) ->
CS = machi_util:checksum_chunk(Chunk),
if CS == Client_CSum ->
machi_util:make_tagged_csum(server_sha,
Client_CSum);
true ->
throw({bad_csum, CS})
end.
%%%% High PB mode %%%%
do_pb_hl_request(#mpb_request{req_id=ReqID}, #state{pb_mode=low}=S) ->
Result = {low_error, 41, "High protocol request while in low mode"},
{machi_pb_translate:to_pb_response(ReqID, unused, Result), S};
do_pb_hl_request(PB_request, S) ->
{ReqID, Cmd} = machi_pb_translate:from_pb_request(PB_request),
{Result, S2} = do_pb_hl_request2(Cmd, S),
{machi_pb_translate:to_pb_response(ReqID, Cmd, Result), S2}.
do_pb_hl_request2({high_echo, Msg}, S) ->
{Msg, S};
do_pb_hl_request2({high_auth, _User, _Pass}, S) ->
{-77, S};
do_pb_hl_request2({high_append_chunk, CoC_Namespace, CoC_Locator,
Prefix, ChunkBin, TaggedCSum,
ChunkExtra}, #state{high_clnt=Clnt}=S) ->
Chunk = {TaggedCSum, ChunkBin},
Res = machi_cr_client:append_chunk_extra(Clnt, CoC_Namespace, CoC_Locator,
Prefix, Chunk,
ChunkExtra),
{Res, S};
do_pb_hl_request2({high_write_chunk, File, Offset, ChunkBin, TaggedCSum},
#state{high_clnt=Clnt}=S) ->
Chunk = {TaggedCSum, ChunkBin},
Res = machi_cr_client:write_chunk(Clnt, File, Offset, Chunk),
{Res, S};
do_pb_hl_request2({high_read_chunk, File, Offset, Size, Opts},
#state{high_clnt=Clnt}=S) ->
Res = machi_cr_client:read_chunk(Clnt, File, Offset, Size, Opts),
{Res, S};
do_pb_hl_request2({high_trim_chunk, File, Offset, Size},
#state{high_clnt=Clnt}=S) ->
Res = machi_cr_client:trim_chunk(Clnt, File, Offset, Size),
{Res, S};
do_pb_hl_request2({high_checksum_list, File}, #state{high_clnt=Clnt}=S) ->
Res = machi_cr_client:checksum_list(Clnt, File),
{Res, S};
do_pb_hl_request2({high_list_files}, #state{high_clnt=Clnt}=S) ->
Res = machi_cr_client:list_files(Clnt),
{Res, S}.
make_high_clnt(#state{high_clnt=undefined}=S) ->
{ok, Proj} = machi_projection_store:read_latest_projection(
S#state.proj_store, private),
Ps = [P_srvr || {_, P_srvr} <- orddict:to_list(
Proj#projection_v1.members_dict)],
{ok, Clnt} = machi_cr_client:start_link(Ps),
S#state{high_clnt=Clnt};
make_high_clnt(S) ->
S.

16
src/machi_sup.erl
View file

@ -47,8 +47,6 @@ start_link() ->
supervisor:start_link({local, ?SERVER}, ?MODULE, []).
init([]) ->
%% {_, Ps} = process_info(self(), links),
%% [unlink(P) || P <- Ps],
RestartStrategy = one_for_one,
MaxRestarts = 1000,
MaxSecondsBetweenRestarts = 3600,
@ -59,12 +57,8 @@ init([]) ->
Shutdown = ?SHUTDOWN,
Type = supervisor,
ServerSup =
{machi_flu_sup, {machi_flu_sup, start_link, []},
Restart, Shutdown, Type, []},
{ok, {SupFlags, [ServerSup]}}.
%% AChild = {'AName', {'AModule', start_link, []},
%% Restart, Shutdown, Type, ['AModule']},
%% {ok, {SupFlags, [AChild]}}.
FluSup = {machi_flu_sup, {machi_flu_sup, start_link, []},
Restart, Shutdown, Type, []},
RanchSup = {ranch_sup, {ranch_sup, start_link, []},
Restart, Shutdown, supervisor, [ranch_sup]},
{ok, {SupFlags, [FluSup, RanchSup]}}.