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riak_test/tests/ts_updown_util.erl

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%% -------------------------------------------------------------------
%%
%% Copyright (c) 2016 Basho Technologies, Inc.
%%
%% 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 Facilities to use in CT-enabled upgrade/downgrade tests.
-module(ts_updown_util).
-export([
make_config/1,
maybe_shutdown_client_node/1,
run_scenarios/2,
run_scenario/2
]).
-include_lib("eunit/include/eunit.hrl").
-include("ts_updown_util.hrl").
-type versioned_cluster() :: [{node(), version()}].
%% preparations
make_config(Config) ->
lists:foldl(
fun(Fun, Cfg) -> Fun(Cfg) end,
Config,
[fun make_node_config/1,
fun make_client_config/1]).
make_node_config(Config) ->
%% build the starting (old = upgraded, current) cluster
Nodes = rt:build_cluster(
lists:duplicate(3, current)),
Config ++
[
{nodes, Nodes}
].
make_client_config(Config) ->
UsePreviousClient = proplists:get_value(use_previous_client, Config, false),
PrevClientNode = maybe_setup_slave_for_previous_client(UsePreviousClient),
Config ++
[
{previous_client_node, PrevClientNode}
].
maybe_setup_slave_for_previous_client(true) ->
%% set up a separate, slave node for the 'previous' version
%% client, to talk to downgraded nodes
_ = application:start(crypto),
Suffix = [crypto:rand_uniform($a, $z) || _ <- [x,x,x,i,x,x,x,i]],
PrevRiakcNode = list_to_atom("alsoran_"++Suffix++"@127.0.0.1"),
rt_client:set_up_slave_for_previous_client(PrevRiakcNode);
maybe_setup_slave_for_previous_client(_) ->
node().
maybe_shutdown_client_node(Config) ->
case ?CFG(previous_client_node, Config) of
ThisNode when ThisNode == node() ->
ok;
SlaveNode ->
rt_slave:stop(SlaveNode)
end.
%% scenarios
-spec run_scenarios(config(), [#scenario{}]) -> [#failure_report{}].
run_scenarios(Config, Scenarios) ->
Failures =
lists:foldl(
fun(Scenario, FF) ->
run_scenario(Config, Scenario) ++ FF
end,
[], Scenarios),
if length(Failures) == 0 ->
fine;
el/=se ->
PrintMe = layout_fails_for_printing(Failures),
ct:print("Failing queries:\n"
"----------------\n"
"~s\n", [PrintMe])
end,
Failures.
-spec run_scenario(config(), #scenario{})
-> {versioned_cluster(), [#failure_report{}]}.
run_scenario(Config,
#scenario{table_node_vsn = TableNodeVsn,
query_node_vsn = QueryNodeVsn,
need_table_node_transition = NeedTableNodeTransition,
need_query_node_transition = NeedQueryNodeTransition,
need_pre_cluster_mixed = NeedPreClusterMixed,
need_post_cluster_mixed = NeedPostClusterMixed,
%% for these, we may have invariants in Config:
data = Data_,
table = Table_,
ddl = DDL_,
select_vs_expected = SelectVsExpected_}) ->
NodesAtVersions0 =
[{N, rtdev:node_version(rtdev:node_id(N))} || N <- ?CFG(nodes, Config)],
%% 0. retreive scenario-invariant data from Config
[Data, Table, DDL, SelectVsExpected] =
[begin
case Supplied of
undefined ->
?CFG(Item, Config);
Defined ->
Defined
end
end || {Supplied, Item} <- [{Data_, data}, {Table_, table}, {DDL_, ddl},
{SelectVsExpected_, select_vs_expected}]],
ct:log("Scenario: table/query_node_vsn: ~p/~p\n"
" need_table_node_transition: ~p\n"
" need_query_node_transition: ~p\n"
" need_pre_cluster_mixed: ~p\n"
" need_post_cluster_mixed: ~p\n"
" DDL: ~p\n"
" ~b queries\n", [TableNodeVsn, QueryNodeVsn,
NeedTableNodeTransition, NeedQueryNodeTransition,
NeedPreClusterMixed, NeedPostClusterMixed,
DDL, length(SelectVsExpected)]),
%% 1. pick two nodes for create table and subsequent selects
{TableNode, NodesAtVersions1} =
find_or_make_node_at_vsn(NodesAtVersions0, TableNodeVsn, []),
{QueryNode, NodesAtVersions2} =
find_or_make_node_at_vsn(NodesAtVersions1, QueryNodeVsn, [TableNode]),
%% 2. try to ensure cluster is (not) mixed as hinted but keep the
%% interesting nodes at their versions as set in step 1.
NodesAtVersions3 =
ensure_cluster(NodesAtVersions2, NeedPreClusterMixed, [TableNode, QueryNode]),
%% 3. create table, put data (this step is always assumed to
%% succeed in the context of this test suite; hence the
%% matching on success return values).
Client1 = rt:pbc(TableNode),
{ok, {[],[]}} = riakc_ts:query(Client1, DDL),
ok = wait_until_active_table(Client1, Table, 5),
ok = riakc_ts:put(Client1, Table, Data),
ct:log("Table ~p created; put ~b records", [Table, length(Data)]),
%% 4. possibly do a transition, on none, one of, or both create
%% table node and query node
NodesAtVersions4 =
if NeedTableNodeTransition ->
possibly_transition_node(NodesAtVersions3, TableNode,
other_version(TableNodeVsn));
el/=se ->
NodesAtVersions3
end,
NodesAtVersions5 =
if NeedQueryNodeTransition ->
possibly_transition_node(NodesAtVersions4, QueryNode,
other_version(QueryNodeVsn));
el/=se ->
NodesAtVersions4
end,
%% 5. after transitioning the two relevant nodes, try to bring the
%% other nodes to satisfy the mixed/non-mixed hint
_NodesAtVersions6 =
ensure_cluster(NodesAtVersions5, NeedPostClusterMixed, [TableNode, QueryNode]),
%% 6. issue the queries and collect failures
Failures =
lists:foldl(
fun({QryNo, {SelectQueryFmt, Expected}}, FailuresAcc) ->
SelectQuery = fmt(SelectQueryFmt, [Table]),
Got = query_with_client(SelectQuery, QueryNode, Config),
case ts_util:assert_float(
fmt("Query #~p", [QryNo]), Expected, Got) of
pass ->
FailuresAcc;
fail ->
lists:append(
FailuresAcc,
[#failure_report{cluster = NodesAtVersions2,
table_node = TableNode,
query_node = QueryNode,
did_transition_table_node = NeedTableNodeTransition,
did_transition_query_node = NeedQueryNodeTransition,
failing_query = SelectQuery,
expected = Expected,
error = Got}])
end
end,
[],
SelectVsExpected),
%% 9. along with any failures, pass the current cluster
%% composition to the next invocation of run_scenario
Failures.
query_with_client(Query, Node, Config) ->
Version = rtdev:node_version(rtdev:node_id(Node)),
Client = rt:pbc(Node),
case Version of
current ->
riakc_ts:query(Client, Query);
previous ->
rpc:call(
?CFG(previous_client_node, Config),
riakc_ts, query, [Client, Query])
end.
-spec is_cluster_mixed(versioned_cluster()) -> boolean().
is_cluster_mixed(NodesAtVersions) ->
{_N0, V0} = hd(NodesAtVersions),
not lists:all(fun({_N, V}) -> V == V0 end, NodesAtVersions).
-spec ensure_cluster(versioned_cluster(), boolean(), [node()])
-> versioned_cluster().
%% @doc Massage the cluster if necessary (and if possible) to pick two
%% nodes of specific versions, optionally ensuring the resulting
%% cluster is mixed or not.
ensure_cluster(NodesAtVersions0, NeedClusterMixed, ImmutableNodes) ->
ImmutableVersions =
[rtdev:node_version(rtdev:node_id(Node)) || Node <- ImmutableNodes],
IsInherentlyMixed =
(length(lists:usort(ImmutableVersions)) > 1),
%% possibly transition some other node to fulfil cluster
%% homogeneity condition
NodesAtVersions1 =
case {is_cluster_mixed(NodesAtVersions0), NeedClusterMixed} of
{true, true} ->
NodesAtVersions0;
{false, false} ->
NodesAtVersions0;
{false, true} ->
%% just flip an uninvolved node
{_ThirdNode, NodesAtDiffVersions} =
find_or_make_node_at_vsn(
NodesAtVersions0, other_version(hd(ImmutableVersions)), ImmutableNodes),
NodesAtDiffVersions;
%% non-mixed/mixed hints can be honoured only when
%% TableNodeVsn and QueryNodeVsn are same/not the same:
{true, false} when not IsInherentlyMixed ->
%% cluster is mixed even though both relevant nodes
%% are at same version: align the rest
ensure_single_version_cluster(
NodesAtVersions0, hd(ImmutableVersions), ImmutableNodes);
{true, false} when IsInherentlyMixed ->
%% cluster is mixed because both relevant nodes are
%% not at same version: don't honour the hint
ct:log("ignoring NeedClusterMixed == false hint because TableNodeVsn /= QueryNodeVsn", []),
NodesAtVersions0
end,
NodesAtVersions1.
-spec find_or_make_node_at_vsn(versioned_cluster(), version(), [node()])
-> {node(), versioned_cluster()}.
find_or_make_node_at_vsn(NodesAtVersions0, ReqVersion, ImmutableNodes) ->
MutableNodes =
[{N, V} || {N, V} <- NodesAtVersions0, not lists:member(N, ImmutableNodes)],
case hd(MutableNodes) of
{Node, Vsn} when Vsn == ReqVersion ->
{Node, NodesAtVersions0};
{Node, TransitionMe} ->
OtherVersion = other_version(TransitionMe),
ok = transition_node(Node, OtherVersion),
{Node, lists:keyreplace(Node, 1, NodesAtVersions0, {Node, OtherVersion})}
end.
-spec ensure_single_version_cluster(versioned_cluster(), version(), [node()])
-> versioned_cluster().
ensure_single_version_cluster(NodesAtVersions, ReqVersion, ImmutableNodes) ->
Transitionable =
[N || {N, V} <- NodesAtVersions,
V /= ReqVersion, not lists:member(N, ImmutableNodes)],
rt:pmap(fun(N) -> transition_node(N, ReqVersion) end, Transitionable),
%% recreate NodesAtVersions
[{N, ReqVersion} || {N, _V} <- NodesAtVersions].
-spec transition_node(node(), version()) -> ok.
transition_node(Node, Version) ->
ok = rt:upgrade(Node, Version),
ok = rt:wait_for_service(Node, riak_kv).
-spec possibly_transition_node(versioned_cluster(), node(), version())
-> versioned_cluster().
possibly_transition_node(NodesAtVersions, Node, ReqVsn) ->
case lists:keyfind(Node, 1, NodesAtVersions) of
ReqVsn ->
NodesAtVersions;
_TransitionMe ->
ok = transition_node(Node, ReqVsn),
lists:keyreplace(Node, 1, NodesAtVersions,
{Node, ReqVsn})
end.
other_version(current) -> previous;
other_version(previous) -> current.
wait_until_active_table(_Client, Table, 0) ->
ct:fail("Table ~s took too long to activate", [Table]),
not_ok;
wait_until_active_table(Client, Table, N) ->
case riakc_ts:query(Client, "DESCRIBE "++Table) of
{ok, _} ->
ok;
_ ->
timer:sleep(1000),
wait_until_active_table(Client, Table, N-1)
end.
layout_fails_for_printing(FF) ->
lists:flatten(
[io_lib:format(
"Cluster: ~p\n"
"TableNode: ~p, transitioned? ~p\n"
"QueryNode: ~p, transitioned? ~p\n"
"Query: ~p\n"
"Error: ~p\n"
"Expected: ~p\n\n",
[NodesAtVersions,
TableNode, DidTableNodeTransition,
QueryNode, DidQueryNodeTransition,
FailingQuery, Error, Expected])
|| #failure_report{cluster = NodesAtVersions,
table_node = TableNode,
query_node = QueryNode,
did_transition_table_node = DidTableNodeTransition,
did_transition_query_node = DidQueryNodeTransition,
failing_query = FailingQuery,
expected = Expected,
error = Error} <- FF]).
fmt(F, A) ->
lists:flatten(io_lib:format(F, A)).
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