machi/test/machi_chain_manager1_pulse.erl

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%% -------------------------------------------------------------------
%%
%% Machi: a small village of replicated files
%%
%% Copyright (c) 2014 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.
%%
%% -------------------------------------------------------------------
-module(machi_chain_manager1_pulse).
%% The while module is ifdef:ed, rebar should set PULSE
-ifdef(PULSE).
-compile(export_all).
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-include("machi_projection.hrl").
-include_lib("eqc/include/eqc.hrl").
-include_lib("eqc/include/eqc_statem.hrl").
-include("machi.hrl").
-include_lib("eunit/include/eunit.hrl").
-compile({parse_transform, pulse_instrument}).
-compile({pulse_replace_module, [{application, pulse_application}]}).
%% The following functions contains side_effects but are run outside
%% PULSE, i.e. PULSE needs to leave them alone
-compile({pulse_skip,[{prop_pulse_test_,0}, {shutdown_hard,0}]}).
-compile({pulse_no_side_effect,[{file,'_','_'}, {erlang, now, 0}]}).
%% Used for output within EUnit...
-define(QC_FMT(Fmt, Args),
io:format(user, Fmt, Args)).
%% And to force EUnit to output QuickCheck output...
-define(QC_OUT(P),
eqc:on_output(fun(Str, Args) -> ?QC_FMT(Str, Args) end, P)).
-define(MGR, machi_chain_manager1).
-define(MGRTEST, machi_chain_manager1_test).
-define(FLU_PC, machi_proxy_flu1_client).
-record(state, {
step=0,
num_pids,
pids,
dump_state
}).
initial_state() ->
#state{}.
gen_num_pids() ->
choose(2, length(all_list_extra())).
gen_seed() ->
noshrink({choose(1, 10000), choose(1, 10000), choose(1, 10000)}).
gen_old_threshold() ->
noshrink(choose(1, 100)).
gen_no_partition_threshold() ->
noshrink(choose(1, 100)).
command(#state{step=0}) ->
{call, ?MODULE, setup, [gen_num_pids(), gen_seed()]};
command(S) ->
frequency([
{ 1, {call, ?MODULE, change_partitions,
[gen_old_threshold(), gen_no_partition_threshold()]}},
{50, {call, ?MODULE, do_ticks,
[choose(5, 200), S#state.pids,
gen_old_threshold(), gen_no_partition_threshold()]}}
]).
precondition(_S, _) ->
true.
next_state(#state{step=Step}=S, Res, Call) ->
next_state2(S#state{step=Step + 1}, Res, Call).
next_state2(S, Res, {call, _, setup, [NumPids, _Seed]}) ->
S#state{num_pids=NumPids, pids=Res};
next_state2(S, Res, {call, _, dump_state, _Args}) ->
S#state{dump_state=Res};
next_state2(S, _Res, {call, _, _Func, _Args}) ->
S.
postcondition(_S, {call, _, _Func, _Args}, _Res) ->
true.
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all_list_extra() ->
[ %% Genenerators assume that this list is at least 2 items
{#p_srvr{name=a, address="localhost", port=7400,
props=[{chmgr, a_chmgr}]}, "./data.pulse.a"}
, {#p_srvr{name=b, address="localhost", port=7401,
props=[{chmgr, b_chmgr}]}, "./data.pulse.b"}
, {#p_srvr{name=c, address="localhost", port=7402,
props=[{chmgr, c_chmgr}]}, "./data.pulse.c"}
, {#p_srvr{name=d, address="localhost", port=7403,
props=[{chmgr, d_chmgr}]}, "./data.pulse.d"}
, {#p_srvr{name=e, address="localhost", port=7404,
props=[{chmgr, e_chmgr}]}, "./data.pulse.e"}
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].
all_list() ->
[P#p_srvr.name || {P, _Dir} <- all_list_extra()].
setup(Num, Seed) ->
?QC_FMT("\nsetup(~w", [Num]),
error_logger:tty(false),
All_list = lists:sublist(all_list(), Num),
All_listE = lists:sublist(all_list_extra(), Num),
%% shutdown_hard() has taken care of killing all relevant procs.
[machi_flu1_test:clean_up_data_dir(Dir) || {_P, Dir} <- All_listE],
?QC_FMT(",z~w", [?LINE]),
%% Start partition simulator
{ok, PSimPid} = machi_partition_simulator:start_link(Seed, 0, 100),
_Partitions = machi_partition_simulator:get(All_list),
?QC_FMT(",z~w", [?LINE]),
%% Start FLUs and their associated procs
{ok, SupPid} = machi_flu_sup:start_link(),
FluOpts = [{use_partition_simulator, true}, {active_mode, false}],
[begin
#p_srvr{name=Name, port=Port} = P,
{ok, _} = machi_flu_psup:start_flu_package(Name, Port, Dir, FluOpts)
end || {P, Dir} <- All_listE],
%% Set up the chain
Dict = orddict:from_list([{P#p_srvr.name, P} || {P, _Dir} <- All_listE]),
?QC_FMT(",z~w", [?LINE]),
[machi_chain_manager1:set_chain_members(get_chmgr(P), Dict) ||
{P, _Dir} <- All_listE],
%% Trigger some environment reactions for humming consensus: first
%% do all the same server first, then round-robin evenly across
%% servers.
[begin
_QQa = machi_chain_manager1:test_react_to_env(get_chmgr(P))
end || {P, _Dir} <- All_listE, _I <- lists:seq(1,20), _Repeat <- [1,2]],
?QC_FMT(",z~w", [?LINE]),
[begin
_QQa = machi_chain_manager1:test_react_to_env(get_chmgr(P))
end || _I <- lists:seq(1,20), {P, _Dir} <- All_listE, _Repeat <- [1,2]],
?QC_FMT(",z~w", [?LINE]),
ProxiesDict = ?FLU_PC:start_proxies(Dict),
Res = {PSimPid, SupPid, ProxiesDict, All_listE},
put(manager_pids_hack, Res),
?QC_FMT("),", []),
Res.
change_partitions(OldThreshold, NoPartitionThreshold) ->
machi_partition_simulator:reset_thresholds(OldThreshold,
NoPartitionThreshold).
always_last_partitions() ->
machi_partition_simulator:always_last_partitions().
private_stable_check() ->
{_PSimPid, _SupPid, ProxiesDict, All_listE} = get(manager_pids_hack),
Res = private_projections_are_stable_check(ProxiesDict, All_listE),
if not Res ->
io:format(user, "BUMMER: private stable check failed!\n", []);
true ->
ok
end,
Res.
do_ticks(Num, PidsMaybe, OldThreshold, NoPartitionThreshold) ->
io:format(user, "~p,~p,~p|", [Num, OldThreshold, NoPartitionThreshold]),
{_PSimPid, _SupPid, ProxiesDict, All_listE} =
case PidsMaybe of
undefined -> get(manager_pids_hack);
_ -> PidsMaybe
end,
if is_integer(OldThreshold) ->
machi_partition_simulator:reset_thresholds(OldThreshold,
NoPartitionThreshold);
true ->
?QC_FMT("{e=~w},", [get_biggest_private_epoch_number(ProxiesDict)]),
machi_partition_simulator:no_partitions()
end,
Res = exec_ticks(Num, All_listE),
if not is_integer(OldThreshold) ->
?QC_FMT("{e=~w},", [get_biggest_private_epoch_number(ProxiesDict)]);
true ->
ok
end,
Res.
get_biggest_private_epoch_number(ProxiesDict) ->
lists:last(
lists:usort(
lists:flatten(
[begin
{ok, {Epoch, _}} = ?FLU_PC:get_latest_epochid(Proxy, private),
Epoch
end || {_Name, Proxy} <- orddict:to_list(ProxiesDict)]))).
dump_state() ->
try
?QC_FMT("dump_state(", []),
{_PSimPid, _SupPid, ProxiesDict, _AlE} = get(manager_pids_hack),
Report = ?MGRTEST:unanimous_report(ProxiesDict),
Namez = ProxiesDict,
%% ?QC_FMT("Report ~p\n", [Report]),
%% Diag1 = [begin
%% {ok, Ps} = ?FLU_PC:get_all_projections(Proxy, Type),
%% [io_lib:format("~p ~p ~p: ~w\n", [FLUName, Type, P#projection_v1.epoch_number, machi_projection:make_summary(P)]) || P <- Ps]
%% end || {FLUName, Proxy} <- orddict:to_list(ProxiesDict),
%% Type <- [public] ],
UniquePrivateEs =
lists:usort(lists:flatten(
[element(2,?FLU_PC:list_all_projections(Proxy,private)) ||
{_FLUName, Proxy} <- orddict:to_list(ProxiesDict)])),
P_lists0 = [{FLUName, Type,
element(2,?FLU_PC:get_all_projections(Proxy, Type))} ||
{FLUName, Proxy} <- orddict:to_list(ProxiesDict),
Type <- [public,private]],
P_lists = [{FLUName, Type, P} || {FLUName, Type, Ps} <- P_lists0,
P <- Ps],
AllDict = lists:foldl(fun({FLU, Type, P}, D) ->
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K = {FLU, Type, P#projection_v1.epoch_number},
dict:store(K, P, D)
end, dict:new(), lists:flatten(P_lists)),
DumbFinderBackward =
fun(FLUName) ->
fun(E, error_unwritten) ->
case dict:find({FLUName, private, E}, AllDict) of
{ok, T} -> T;
error -> error_unwritten
end;
(_E, Acc) ->
Acc
end
end,
%% Diag2 = [[
%% io_lib:format("~p private: ~w\n",
%% [FLUName,
%% machi_projection:make_summary(
%% lists:foldl(DumbFinderBackward(FLUName),
%% error_unwritten,
%% lists:seq(Epoch, 0, -1)))])
%% || {FLUName, _FLU} <- Namez]
%% || Epoch <- UniquePrivateEs],
PrivProjs = [{Name, begin
{ok, Ps} = ?FLU_PC:get_all_projections(Proxy,
private),
[P || P <- Ps,
P#projection_v1.epoch_number /= 0]
end} || {Name, Proxy} <- ProxiesDict],
?QC_FMT(")", []),
Diag1 = Diag2 = "skip_diags",
{Report, PrivProjs, lists:flatten([Diag1, Diag2])}
catch XX:YY ->
?QC_FMT("OUCH: ~p ~p @ ~p\n", [XX, YY, erlang:get_stacktrace()]),
?QC_FMT("Exiting now to move to manual post-mortem....\n", []),
erlang:halt(0),
false
end.
prop_pulse() ->
?FORALL({Cmds0, Seed}, {non_empty(commands(?MODULE)), pulse:seed()},
?IMPLIES(1 < length(Cmds0) andalso length(Cmds0) < 5,
begin
ok = shutdown_hard(),
%% PULSE can be really unfair, of course, including having exec_ticks
%% run where all of FLU a does its ticks then FLU b. Such a situation
%% doesn't always allow unanimous private projection store values:
%% FLU a might need one more tick to write its private projection, but
%% it isn't given a chance at the end of the PULSE run. So we cheat
Stabilize1 = [{set,{var,99999995},
{call, ?MODULE, always_last_partitions, []}}],
Stabilize2 = [{set,{var,99999996},
{call, ?MODULE, private_stable_check, []}}],
LastTriggerTicks = {set,{var,99999997},
{call, ?MODULE, do_ticks, [123, undefined, no, no]}},
Cmds1 = lists:duplicate(2, LastTriggerTicks),
%% Cmds1 = lists:duplicate(length(all_list())*2, LastTriggerTicks),
Cmds = Cmds0 ++
Stabilize1 ++
Cmds1 ++
Stabilize2 ++
[{set,{var,99999999}, {call, ?MODULE, dump_state, []}}],
{_H2, S2, Res} = pulse:run(
fun() ->
{_H, _S, _R} = run_commands(?MODULE, Cmds)
end, [{seed, Seed},
{strategy, unfair}]),
%% ?QC_FMT("S2 ~p\n", [S2]),
case S2#state.dump_state of
undefined ->
?QC_FMT("BUMMER Cmds = ~p\n", [Cmds]);
_ ->
ok
end,
{Report, PrivProjs, Diag} = S2#state.dump_state,
%% Report is ordered by Epoch. For each private projection
%% written during any given epoch, confirm that all chain
%% members appear in only one unique chain, i.e., the sets of
%% unique chains are disjoint.
AllDisjointP = ?MGRTEST:all_reports_are_disjoint(Report),
%% For each chain transition experienced by a particular FLU,
%% confirm that each state transition is OK.
Sane =
[{FLU,_SaneRes} = {FLU,?MGR:projection_transitions_are_sane_retrospective(
Ps, FLU)} ||
{FLU, Ps} <- PrivProjs],
SaneP = lists:all(fun({_FLU, SaneRes}) -> SaneRes == true end, Sane),
%% The final report item should say that all are agreed_membership.
{_LastEpoch, {ok_disjoint, LastRepXs}} = lists:last(Report),
AgreedOrNot = lists:usort([element(1, X) || X <- LastRepXs]),
%% TODO: Check that we've converged to a single chain with no repairs.
SingleChainNoRepair = case LastRepXs of
[{agreed_membership,{_UPI,[]}}] ->
true;
_ ->
LastRepXs
end,
ok = shutdown_hard(),
?WHENFAIL(
begin
?QC_FMT("Cmds = ~p\n", [Cmds]),
?QC_FMT("Res = ~p\n", [Res]),
?QC_FMT("Diag = ~s\n", [Diag]),
?QC_FMT("Report = ~p\n", [Report]),
?QC_FMT("PrivProjs = ~p\n", [PrivProjs]),
?QC_FMT("Sane = ~p\n", [Sane]),
?QC_FMT("SingleChainNoRepair failure =\n ~p\n", [SingleChainNoRepair])
,erlang:halt(0)
end,
conjunction([{res, Res == true orelse Res == ok},
{all_disjoint, AllDisjointP},
{sane, SaneP},
{all_agreed_at_end, AgreedOrNot == [agreed_membership]},
{single_chain_no_repair, SingleChainNoRepair}
]))
end)).
prop_pulse_test_() ->
Timeout = case os:getenv("PULSE_TIME") of
false -> 60;
Val -> list_to_integer(Val)
end,
ExtraTO = case os:getenv("PULSE_SHRINK_TIME") of
false -> 0;
Val2 -> list_to_integer(Val2)
end,
{timeout, (Timeout+ExtraTO+300), % 300 = a bit more fudge time
fun() ->
?assert(eqc:quickcheck(eqc:testing_time(Timeout,
?QC_OUT(prop_pulse()))))
end}.
shutdown_hard() ->
?QC_FMT("shutdown(", []),
(catch unlink(whereis(machi_partition_simulator))),
[begin
Pid = whereis(X),
spawn(fun() -> (catch X:stop()) end),
timer:sleep(50),
(catch unlink(Pid)),
timer:sleep(10),
(catch exit(Pid, shutdown)),
timer:sleep(1),
(catch exit(Pid, kill))
end || X <- [machi_partition_simulator, machi_flu_sup] ],
timer:sleep(1),
?QC_FMT(")", []),
ok.
exec_ticks(Num, All_listE) ->
Parent = self(),
Pids = [spawn_link(fun() ->
[begin
erlang:yield(),
M_name = P#p_srvr.name,
Max = 10,
Elapsed =
?MGR:sleep_ranked_order(1, Max, M_name, all_list()),
Res = ?MGR:test_react_to_env(get_chmgr(P)),
timer:sleep(erlang:max(0, Max - Elapsed)),
Res=Res %% ?D({self(), Res})
end || _ <- lists:seq(1,Num)],
Parent ! done
end) || {P, _Dir} <- All_listE],
[receive
done ->
ok
%% after 500*1000 ->
%% exit(icky_timeout)
end || _Pid <- Pids],
ok.
private_projections_are_stable_check(ProxiesDict, All_listE) ->
%% TODO: extend the check to look not only for latest num, but
%% also check for flapping, and if yes, to see if all_hosed are
%% all exactly equal.
_ = exec_ticks(40, All_listE),
Private1 = [?FLU_PC:get_latest_epochid(Proxy, private) ||
{_FLU, Proxy} <- orddict:to_list(ProxiesDict)],
_ = exec_ticks(5, All_listE),
Private2 = [?FLU_PC:get_latest_epochid(Proxy, private) ||
{_FLU, Proxy} <- orddict:to_list(ProxiesDict)],
(Private1 == Private2).
get_chmgr(#p_srvr{props=Ps}) ->
proplists:get_value(chmgr, Ps).
-endif. % PULSE