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%% -------------------------------------------------------------------
%%
%% riaknostic - automated diagnostic tools for Riak
%%
%% Copyright (c) 2011 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 Diagnostic that checks whether the local node is a member of
%% the ring. This might arise when the node name in vm.args has
%% changed but the node has not been renamed in the ring.
-module(riaknostic_check_ring_membership).
-behaviour(riaknostic_check).
-export([description/0,
valid/0,
check/0,
format/1]).
-include_lib("eunit/include/eunit.hrl").
-spec description() -> string().
description() ->
"Cluster membership validity".
-spec valid() -> boolean().
valid() ->
riaknostic_node:can_connect().
-spec check() -> [{lager:log_level(), term()}].
check() ->
Stats = riaknostic_node:stats(),
{ring_members, RingMembers} = lists:keyfind(ring_members, 1, Stats),
{nodename, NodeName} = lists:keyfind(nodename, 1, Stats),
case lists:member(NodeName, RingMembers) of
true ->
[];
false ->
[{warning, {not_ring_member, NodeName}}]
end.
check_test() ->
meck:new(riaknostic_node, [passthrough]),
meck:expect(riaknostic_node, stats, fun() -> [{ring_members, ["riak@127.0.0.1"]}, {nodename, ["notmember@127.0.0.1"]}] end),
?assert(meck:validate(riaknostic_node)),
?assertEqual([{warning, {not_ring_member, ["notmember@127.0.0.1"]}}], check()),
?assertNotEqual([{warning, {not_ring_member, ["notequal@127.0.0.1"]}}], check()),
meck:unload(riaknostic_node).
-spec format(term()) -> {io:format(), [term()]}.
format({not_ring_member, Nodename}) ->
{"Local node ~w is not a member of the ring. Please check that the -name setting in vm.args is correct.", [Nodename]}.