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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 the local ring for any preflists that do
%% not satisfy n_val
-module(riaknostic_check_ring_preflists).
-behaviour(riaknostic_check).
-export([description/0,
valid/0,
check/0,
format/1]).
-spec description() -> string().
description() ->
"Check ring satisfies n_val".
-spec valid() -> boolean().
valid() ->
riaknostic_node:can_connect().
-spec check() -> [{lager:log_level(), term()}].
check() ->
case riaknostic_node:local_command(riak_core_ring_util, check_ring) of
[] -> [];
PrefLists -> [ {warning, {n_val_not_satisfied, PrefLists}} ]
end.
-spec format(term()) -> {io:format(), [term()]}.
format({n_val_not_satisfied, PrefLists}) ->
{"The following preflists do not satisfy the n_val: ~p", [PrefLists]}.