436 lines
16 KiB
Erlang
436 lines
16 KiB
Erlang
%% -------------------------------------------------------------------
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%%
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%% Machi: a small village of replicated files
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%%
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%% Copyright (c) 2014 Basho Technologies, Inc. All Rights Reserved.
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%%
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%% This file is provided to you under the Apache License,
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%% Version 2.0 (the "License"); you may not use this file
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%% except in compliance with the License. You may obtain
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%% a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing,
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%% software distributed under the License is distributed on an
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%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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%% KIND, either express or implied. See the License for the
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%% specific language governing permissions and limitations
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%% under the License.
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%%
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%% -------------------------------------------------------------------
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-module(machi_chain_manager1_pulse).
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%% The while module is ifdef:ed, rebar should set PULSE
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-ifdef(PULSE).
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-compile(export_all).
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-include("machi_projection.hrl").
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-include_lib("eqc/include/eqc.hrl").
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-include_lib("eqc/include/eqc_statem.hrl").
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-include("machi.hrl").
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-include_lib("eunit/include/eunit.hrl").
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-compile({parse_transform, pulse_instrument}).
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-compile({pulse_replace_module, [{application, pulse_application}]}).
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%% The following functions contains side_effects but are run outside
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%% PULSE, i.e. PULSE needs to leave them alone
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-compile({pulse_skip,[{prop_pulse_test_,0}, {shutdown_hard,0}]}).
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-compile({pulse_no_side_effect,[{file,'_','_'}, {erlang, now, 0}]}).
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%% Used for output within EUnit...
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-define(QC_FMT(Fmt, Args),
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io:format(user, Fmt, Args)).
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%% And to force EUnit to output QuickCheck output...
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-define(QC_OUT(P),
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eqc:on_output(fun(Str, Args) -> ?QC_FMT(Str, Args) end, P)).
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-define(MGR, machi_chain_manager1).
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-define(MGRTEST, machi_chain_manager1_test).
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-define(FLU_PC, machi_proxy_flu1_client).
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-record(state, {
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step=0,
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num_pids,
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pids,
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dump_state
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}).
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initial_state() ->
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#state{}.
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gen_num_pids() ->
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choose(2, length(all_list_extra())).
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gen_seed() ->
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noshrink({choose(1, 10000), choose(1, 10000), choose(1, 10000)}).
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gen_old_threshold() ->
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noshrink(choose(1, 100)).
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gen_no_partition_threshold() ->
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noshrink(choose(1, 100)).
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command(#state{step=0}) ->
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{call, ?MODULE, setup, [gen_num_pids(), gen_seed()]};
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command(S) ->
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frequency([
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{ 1, {call, ?MODULE, change_partitions,
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[gen_old_threshold(), gen_no_partition_threshold()]}},
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{50, {call, ?MODULE, do_ticks,
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[choose(5, 200), S#state.pids,
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gen_old_threshold(), gen_no_partition_threshold()]}}
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]).
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precondition(_S, _) ->
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true.
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next_state(#state{step=Step}=S, Res, Call) ->
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next_state2(S#state{step=Step + 1}, Res, Call).
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next_state2(S, Res, {call, _, setup, [NumPids, _Seed]}) ->
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S#state{num_pids=NumPids, pids=Res};
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next_state2(S, Res, {call, _, dump_state, _Args}) ->
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S#state{dump_state=Res};
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next_state2(S, _Res, {call, _, _Func, _Args}) ->
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S.
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postcondition(_S, {call, _, _Func, _Args}, _Res) ->
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true.
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all_list_extra() ->
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[ %% Genenerators assume that this list is at least 2 items
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{#p_srvr{name=a, address="localhost", port=7400,
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props=[{chmgr, a_chmgr}]}, "./data.pulse.a"}
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, {#p_srvr{name=b, address="localhost", port=7401,
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props=[{chmgr, b_chmgr}]}, "./data.pulse.b"}
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, {#p_srvr{name=c, address="localhost", port=7402,
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props=[{chmgr, c_chmgr}]}, "./data.pulse.c"}
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, {#p_srvr{name=d, address="localhost", port=7403,
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props=[{chmgr, d_chmgr}]}, "./data.pulse.d"}
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, {#p_srvr{name=e, address="localhost", port=7404,
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props=[{chmgr, e_chmgr}]}, "./data.pulse.e"}
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].
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all_list() ->
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[P#p_srvr.name || {P, _Dir} <- all_list_extra()].
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setup(Num, Seed) ->
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?QC_FMT("\nsetup(~w", [Num]),
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error_logger:tty(false),
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All_list = lists:sublist(all_list(), Num),
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All_listE = lists:sublist(all_list_extra(), Num),
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%% shutdown_hard() has taken care of killing all relevant procs.
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[machi_flu1_test:clean_up_data_dir(Dir) || {_P, Dir} <- All_listE],
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?QC_FMT(",z~w", [?LINE]),
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%% Start partition simulator
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{ok, PSimPid} = machi_partition_simulator:start_link(Seed, 0, 100),
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_Partitions = machi_partition_simulator:get(All_list),
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?QC_FMT(",z~w", [?LINE]),
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%% Start FLUs and their associated procs
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{ok, SupPid} = machi_flu_sup:start_link(),
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FluOpts = [{use_partition_simulator, true}, {active_mode, false}],
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[begin
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#p_srvr{name=Name, port=Port} = P,
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{ok, _} = machi_flu_psup:start_flu_package(Name, Port, Dir, FluOpts)
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end || {P, Dir} <- All_listE],
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%% Set up the chain
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Dict = orddict:from_list([{P#p_srvr.name, P} || {P, _Dir} <- All_listE]),
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?QC_FMT(",z~w", [?LINE]),
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[machi_chain_manager1:set_chain_members(get_chmgr(P), Dict) ||
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{P, _Dir} <- All_listE],
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%% Trigger some environment reactions for humming consensus: first
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%% do all the same server first, then round-robin evenly across
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%% servers.
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[begin
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_QQa = machi_chain_manager1:test_react_to_env(get_chmgr(P))
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end || {P, _Dir} <- All_listE, _I <- lists:seq(1,20), _Repeat <- [1,2]],
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?QC_FMT(",z~w", [?LINE]),
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[begin
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_QQa = machi_chain_manager1:test_react_to_env(get_chmgr(P))
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end || _I <- lists:seq(1,20), {P, _Dir} <- All_listE, _Repeat <- [1,2]],
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?QC_FMT(",z~w", [?LINE]),
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ProxiesDict = ?FLU_PC:start_proxies(Dict),
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Res = {PSimPid, SupPid, ProxiesDict, All_listE},
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put(manager_pids_hack, Res),
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?QC_FMT("),", []),
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Res.
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change_partitions(OldThreshold, NoPartitionThreshold) ->
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machi_partition_simulator:reset_thresholds(OldThreshold,
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NoPartitionThreshold).
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always_last_partitions() ->
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machi_partition_simulator:always_last_partitions().
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private_stable_check() ->
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{_PSimPid, _SupPid, ProxiesDict, All_listE} = get(manager_pids_hack),
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Res = private_projections_are_stable_check(ProxiesDict, All_listE),
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if not Res ->
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io:format(user, "BUMMER: private stable check failed!\n", []);
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true ->
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ok
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end,
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Res.
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do_ticks(Num, PidsMaybe, OldThreshold, NoPartitionThreshold) ->
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io:format(user, "~p,~p,~p|", [Num, OldThreshold, NoPartitionThreshold]),
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{_PSimPid, _SupPid, ProxiesDict, All_listE} =
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case PidsMaybe of
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undefined -> get(manager_pids_hack);
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_ -> PidsMaybe
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end,
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if is_integer(OldThreshold) ->
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machi_partition_simulator:reset_thresholds(OldThreshold,
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NoPartitionThreshold);
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true ->
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?QC_FMT("{e=~w},", [get_biggest_private_epoch_number(ProxiesDict)]),
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machi_partition_simulator:no_partitions()
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end,
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Res = exec_ticks(Num, All_listE),
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if not is_integer(OldThreshold) ->
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?QC_FMT("{e=~w},", [get_biggest_private_epoch_number(ProxiesDict)]);
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true ->
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ok
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end,
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Res.
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get_biggest_private_epoch_number(ProxiesDict) ->
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lists:last(
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lists:usort(
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lists:flatten(
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[begin
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{ok, {Epoch, _}} = ?FLU_PC:get_latest_epochid(Proxy, private),
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Epoch
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end || {_Name, Proxy} <- orddict:to_list(ProxiesDict)]))).
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dump_state() ->
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try
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?QC_FMT("dump_state(", []),
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{_PSimPid, _SupPid, ProxiesDict, _AlE} = get(manager_pids_hack),
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Report = ?MGRTEST:unanimous_report(ProxiesDict),
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Namez = ProxiesDict,
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%% ?QC_FMT("Report ~p\n", [Report]),
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%% Diag1 = [begin
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%% {ok, Ps} = ?FLU_PC:get_all_projections(Proxy, Type),
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%% [io_lib:format("~p ~p ~p: ~w\n", [FLUName, Type, P#projection_v1.epoch_number, machi_projection:make_summary(P)]) || P <- Ps]
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%% end || {FLUName, Proxy} <- orddict:to_list(ProxiesDict),
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%% Type <- [public] ],
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UniquePrivateEs =
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lists:usort(lists:flatten(
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[element(2,?FLU_PC:list_all_projections(Proxy,private)) ||
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{_FLUName, Proxy} <- orddict:to_list(ProxiesDict)])),
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P_lists0 = [{FLUName, Type,
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element(2,?FLU_PC:get_all_projections(Proxy, Type))} ||
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{FLUName, Proxy} <- orddict:to_list(ProxiesDict),
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Type <- [public,private]],
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P_lists = [{FLUName, Type, P} || {FLUName, Type, Ps} <- P_lists0,
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P <- Ps],
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AllDict = lists:foldl(fun({FLU, Type, P}, D) ->
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K = {FLU, Type, P#projection_v1.epoch_number},
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dict:store(K, P, D)
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end, dict:new(), lists:flatten(P_lists)),
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DumbFinderBackward =
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fun(FLUName) ->
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fun(E, error_unwritten) ->
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case dict:find({FLUName, private, E}, AllDict) of
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{ok, T} -> T;
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error -> error_unwritten
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end;
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(_E, Acc) ->
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Acc
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end
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end,
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%% Diag2 = [[
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%% io_lib:format("~p private: ~w\n",
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%% [FLUName,
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%% machi_projection:make_summary(
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%% lists:foldl(DumbFinderBackward(FLUName),
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%% error_unwritten,
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%% lists:seq(Epoch, 0, -1)))])
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%% || {FLUName, _FLU} <- Namez]
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%% || Epoch <- UniquePrivateEs],
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PrivProjs = [{Name, begin
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{ok, Ps} = ?FLU_PC:get_all_projections(Proxy,
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private),
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[P || P <- Ps,
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P#projection_v1.epoch_number /= 0]
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end} || {Name, Proxy} <- ProxiesDict],
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?QC_FMT(")", []),
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Diag1 = Diag2 = "skip_diags",
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{Report, PrivProjs, lists:flatten([Diag1, Diag2])}
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catch XX:YY ->
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?QC_FMT("OUCH: ~p ~p @ ~p\n", [XX, YY, erlang:get_stacktrace()]),
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?QC_FMT("Exiting now to move to manual post-mortem....\n", []),
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erlang:halt(0),
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false
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end.
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prop_pulse() ->
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?FORALL({Cmds0, Seed}, {non_empty(commands(?MODULE)), pulse:seed()},
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?IMPLIES(1 < length(Cmds0) andalso length(Cmds0) < 5,
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begin
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ok = shutdown_hard(),
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%% PULSE can be really unfair, of course, including having exec_ticks
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%% run where all of FLU a does its ticks then FLU b. Such a situation
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%% doesn't always allow unanimous private projection store values:
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%% FLU a might need one more tick to write its private projection, but
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%% it isn't given a chance at the end of the PULSE run. So we cheat
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Stabilize1 = [{set,{var,99999995},
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{call, ?MODULE, always_last_partitions, []}}],
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Stabilize2 = [{set,{var,99999996},
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{call, ?MODULE, private_stable_check, []}}],
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LastTriggerTicks = {set,{var,99999997},
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{call, ?MODULE, do_ticks, [123, undefined, no, no]}},
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Cmds1 = lists:duplicate(2, LastTriggerTicks),
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%% Cmds1 = lists:duplicate(length(all_list())*2, LastTriggerTicks),
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Cmds = Cmds0 ++
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Stabilize1 ++
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Cmds1 ++
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Stabilize2 ++
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[{set,{var,99999999}, {call, ?MODULE, dump_state, []}}],
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{_H2, S2, Res} = pulse:run(
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fun() ->
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{_H, _S, _R} = run_commands(?MODULE, Cmds)
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end, [{seed, Seed},
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{strategy, unfair}]),
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%% ?QC_FMT("S2 ~p\n", [S2]),
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case S2#state.dump_state of
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undefined ->
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?QC_FMT("BUMMER Cmds = ~p\n", [Cmds]);
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_ ->
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ok
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end,
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{Report, PrivProjs, Diag} = S2#state.dump_state,
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%% Report is ordered by Epoch. For each private projection
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%% written during any given epoch, confirm that all chain
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%% members appear in only one unique chain, i.e., the sets of
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%% unique chains are disjoint.
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AllDisjointP = ?MGRTEST:all_reports_are_disjoint(Report),
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%% For each chain transition experienced by a particular FLU,
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%% confirm that each state transition is OK.
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Sane =
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[{FLU,_SaneRes} = {FLU,?MGR:projection_transitions_are_sane_retrospective(
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Ps, FLU)} ||
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{FLU, Ps} <- PrivProjs],
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SaneP = lists:all(fun({_FLU, SaneRes}) -> SaneRes == true end, Sane),
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%% The final report item should say that all are agreed_membership.
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{_LastEpoch, {ok_disjoint, LastRepXs}} = lists:last(Report),
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AgreedOrNot = lists:usort([element(1, X) || X <- LastRepXs]),
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%% TODO: Check that we've converged to a single chain with no repairs.
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SingleChainNoRepair = case LastRepXs of
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[{agreed_membership,{_UPI,[]}}] ->
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true;
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_ ->
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LastRepXs
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end,
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ok = shutdown_hard(),
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?WHENFAIL(
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begin
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?QC_FMT("Cmds = ~p\n", [Cmds]),
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?QC_FMT("Res = ~p\n", [Res]),
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?QC_FMT("Diag = ~s\n", [Diag]),
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?QC_FMT("Report = ~p\n", [Report]),
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?QC_FMT("PrivProjs = ~p\n", [PrivProjs]),
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?QC_FMT("Sane = ~p\n", [Sane]),
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?QC_FMT("SingleChainNoRepair failure =\n ~p\n", [SingleChainNoRepair])
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,erlang:halt(0)
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end,
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conjunction([{res, Res == true orelse Res == ok},
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{all_disjoint, AllDisjointP},
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{sane, SaneP},
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{all_agreed_at_end, AgreedOrNot == [agreed_membership]},
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{single_chain_no_repair, SingleChainNoRepair}
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]))
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end)).
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prop_pulse_test_() ->
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Timeout = case os:getenv("PULSE_TIME") of
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false -> 60;
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Val -> list_to_integer(Val)
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end,
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ExtraTO = case os:getenv("PULSE_SHRINK_TIME") of
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false -> 0;
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Val2 -> list_to_integer(Val2)
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end,
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{timeout, (Timeout+ExtraTO+600), % 600 = a bit more fudge time
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fun() ->
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?assert(eqc:quickcheck(eqc:testing_time(Timeout,
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?QC_OUT(prop_pulse()))))
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end}.
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shutdown_hard() ->
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?QC_FMT("shutdown(", []),
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(catch unlink(whereis(machi_partition_simulator))),
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[begin
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Pid = whereis(X),
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spawn(fun() -> (catch X:stop()) end),
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timer:sleep(50),
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(catch unlink(Pid)),
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timer:sleep(10),
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(catch exit(Pid, shutdown)),
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timer:sleep(1),
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(catch exit(Pid, kill))
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end || X <- [machi_partition_simulator, machi_flu_sup] ],
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timer:sleep(1),
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?QC_FMT(")", []),
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ok.
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exec_ticks(Num, All_listE) ->
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Parent = self(),
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Pids = [spawn_link(fun() ->
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[begin
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erlang:yield(),
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M_name = P#p_srvr.name,
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Max = 10,
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Elapsed =
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?MGR:sleep_ranked_order(1, Max, M_name, all_list()),
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Res = ?MGR:test_react_to_env(get_chmgr(P)),
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timer:sleep(erlang:max(0, Max - Elapsed)),
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Res=Res %% ?D({self(), Res})
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end || _ <- lists:seq(1,Num)],
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Parent ! done
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end) || {P, _Dir} <- All_listE],
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[receive
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done ->
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ok
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%% after 500*1000 ->
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%% exit(icky_timeout)
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end || _Pid <- Pids],
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ok.
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private_projections_are_stable_check(ProxiesDict, All_listE) ->
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%% TODO: extend the check to look not only for latest num, but
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%% also check for flapping, and if yes, to see if all_hosed are
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%% all exactly equal.
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_ = exec_ticks(40, All_listE),
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Private1 = [?FLU_PC:get_latest_epochid(Proxy, private) ||
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{_FLU, Proxy} <- orddict:to_list(ProxiesDict)],
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_ = exec_ticks(5, All_listE),
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Private2 = [?FLU_PC:get_latest_epochid(Proxy, private) ||
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{_FLU, Proxy} <- orddict:to_list(ProxiesDict)],
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(Private1 == Private2).
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get_chmgr(#p_srvr{props=Ps}) ->
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proplists:get_value(chmgr, Ps).
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-endif. % PULSE
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