mirror of
https://github.com/valitydev/riak_test.git
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225 lines
7.2 KiB
Erlang
225 lines
7.2 KiB
Erlang
%% -------------------------------------------------------------------
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%%
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%% Copyright (c) 2014 Basho Technologies, Inc.
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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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%%% @copyright (C) 2014, Basho Technologies
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%%% @doc
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%%% riak_test for kv679 doomstone flavour.
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%%%
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%%% issue kv679 is a possible dataloss issue, it's basically caused by
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%%% the fact that per key logical clocks can go backwards in time in
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%%% certain situations. The situation under test here is as follows:
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%%% Create value
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%%% Delete value (write tombstone (including one fallback) reap tombstone from primaries only)
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%%% write new value
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%%% fallback hands off and the tombstone dominates the new value.
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%%% @end
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-module(kv679_tombstone).
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-behavior(riak_test).
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-compile([export_all]).
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-export([confirm/0]).
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-include_lib("eunit/include/eunit.hrl").
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-define(BUCKET, <<"kv679">>).
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-define(KEY, <<"test">>).
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confirm() ->
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Config = [{riak_core, [{ring_creation_size, 8},
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{vnode_management_timer, 1000},
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{handoff_concurrency, 100},
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{vnode_inactivity_timeout, 1000}]}],
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Nodes = rt:build_cluster(4, Config),
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Clients=[P1, _P2, _P3, _P4] = create_pb_clients(Nodes),
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%% Get preflist for key
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PL = get_preflist(hd(Nodes)),
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CoordClient = coordinating_client(Clients, PL),
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%% Write key some times
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write_key(CoordClient, [<<"bob">>, <<"phil">>, <<"pete">>]),
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lager:info("wrote key thrice"),
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%% %% take a node that is a primary down
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{NewPL, DeadPrimary, _} = kill_primary(PL),
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lager:info("killed a primary"),
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%% %% This way a tombstone finds its way to a fallback, to later
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%% %% wreak DOOM!!!!
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Client = up_client(DeadPrimary, Clients),
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delete_key(Client),
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lager:info("deleted key, and have tombstone response"),
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%% %% Take down the fallback
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{NewPL2, DeadFallback, _DeadPartition} = kill_fallback(NewPL),
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%% %% Bring the primary back up
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_PL3 = start_node(DeadPrimary, NewPL2),
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lager:info("killed the fallback, and restored the primary"),
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%% %% wait for reaping maybe read for vclock ts and wait until there
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%% %% is not one
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UpClient = up_client(DeadFallback, Clients),
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read_it_and_reap(UpClient),
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lager:info("read repaired, and reaped the tombstone"),
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%% %% write the key again, this will start a new clock, a clock
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%% that is in the past of that lingering tombstone. We use the
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%% same node to get the same clock.
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write_key(CoordClient, [<<"jon">>]),
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%% %% bring up that fallback, and wait for it to hand off
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start_fallback_and_wait_for_handoff(DeadFallback),
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%% Read twice, just in case (repair, reap.)
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Res1 = read_key(P1),
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lager:info("TS? ~p~n", [Res1]),
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Res2 = read_key(P1),
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lager:info("res ~p", [Res2]),
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?assertMatch({ok, _}, Res2),
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{ok, Obj} = Res2,
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?assertEqual(<<"jon">>, riakc_obj:get_value(Obj)),
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pass.
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%%% Client/Key ops
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create_pb_clients(Nodes) ->
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[begin
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C = rt:pbc(N),
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riakc_pb_socket:set_options(C, [queue_if_disconnected]),
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{N, C}
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end || N <- Nodes].
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coordinating_client(Clients, Preflist) ->
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{{_, FirstPrimary}, primary} = lists:keyfind(primary, 2, Preflist),
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lists:keyfind(FirstPrimary, 1, Clients).
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up_client(DeadNode, Clients) ->
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{value, _, LiveClients} = lists:keytake(DeadNode, 1, Clients),
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hd(LiveClients).
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write_key(Client, Vals) ->
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write_key(Client, Vals, []).
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write_key(_, [], _Opts) ->
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ok;
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write_key(Client, [Val | Rest], Opts) ->
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ok = write_key(Client, Val, Opts),
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ok = write_key(Client, Rest, Opts);
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write_key({_, Client}, Val, Opts) when is_binary(Val) ->
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Object = case riakc_pb_socket:get(Client, ?BUCKET, ?KEY, []) of
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{ok, O1} ->
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lager:info("writing existing!"),
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riakc_obj:update_value(O1, Val);
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_ ->
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lager:info("writing new!"),
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riakc_obj:new(?BUCKET, ?KEY, Val)
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end,
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riakc_pb_socket:put(Client, Object, Opts).
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read_key({_, Client}) ->
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riakc_pb_socket:get(Client, ?BUCKET, ?KEY, []).
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delete_key({_, Client}) ->
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riakc_pb_socket:delete(Client, ?BUCKET, ?KEY),
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rt:wait_until(fun() ->
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case riakc_pb_socket:get(Client, ?BUCKET, ?KEY, [deletedvclock]) of
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{error, notfound, VC} ->
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lager:info("TSVC ~p~n", [VC]),
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true;
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Res ->
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lager:info("no ts yet: ~p~n", [Res]),
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false
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end
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end).
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read_it_and_reap({_, Client}) ->
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rt:wait_until(fun() ->
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case riakc_pb_socket:get(Client, ?BUCKET, ?KEY, [deletedvclock]) of
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{error, notfound} ->
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true;
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Res ->
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lager:info("not reaped ts yet: ~p~n", [Res]),
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false
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end
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end).
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%%% Node ops
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start_node(Node, Preflist) ->
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rt:start_and_wait(Node),
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wait_for_new_pl(Preflist, Node).
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get_preflist(Node) ->
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Chash = rpc:call(Node, riak_core_util, chash_key, [{?BUCKET, ?KEY}]),
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UpNodes = rpc:call(Node, riak_core_node_watcher, nodes, [riak_kv]),
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PL = rpc:call(Node, riak_core_apl, get_apl_ann, [Chash, 3, UpNodes]),
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PL.
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kill_primary(Preflist) ->
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kill_and_wait(Preflist, primary).
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kill_fallback(Preflist) ->
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kill_and_wait(Preflist, fallback).
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kill_and_wait(Preflist, Type) ->
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case lists:keytake(Type, 2, Preflist) of
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false ->
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erlang:error(no_nodes_of_type, [Type, Preflist]);
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{value, {{Idx, Node}, Type}, PL2} ->
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kill_node(Node),
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lager:info("killed ~p~n", [Node]),
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[{{_, N2}, _}|_] = PL2,
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{wait_for_new_pl(Preflist, N2), Node, Idx}
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end.
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kill_node(Node) ->
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rt:stop_and_wait(Node).
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wait_for_new_pl(PL, Node) ->
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rt:wait_until(fun() ->
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NewPL = get_preflist(Node),
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lager:info("new ~p~n old ~p~nNode ~p~n", [NewPL, PL, Node]),
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NewPL /= PL
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end),
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get_preflist(Node).
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start_fallback_and_wait_for_handoff(DeadFallback) ->
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%% Below is random voodoo shit as I have no idea how to _KNOW_ that handoff has happened
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%% whatver, it takes 2 minutes, force_handoff? 2 minutes son!
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rt:start_and_wait(DeadFallback),
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rpc:call(DeadFallback, riak_core_vnode_manager, force_handoffs, []),
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rt:wait_until_transfers_complete([DeadFallback]).
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