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%% -------------------------------------------------------------------
%%
%% weatherreport - automated diagnostic tools for CouchDB
%%
%% Copyright (c) 2014 Cloudant
%%
%% 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 <p>The <code>weatherreport_runner</code> module provides
%% utility functions for running checks either on a single node or
%% multiple nodes.
-module(weatherreport_runner).
-export([run/1, run/2, format/1]).
%% @doc Run the supplied list of checks on the local node
-spec run([Module :: atom()]) -> [tuple()].
run(Checks) ->
weatherreport_node:can_connect(),
run(Checks, [weatherreport_node:nodename()]).
%% @doc Run the supplied list of checks on the supplied list of cluster nodes
-spec run([Module :: atom()], [node()] | all) -> [tuple()].
run(Checks, all) ->
weatherreport_node:can_connect(),
case weatherreport_node:local_command(mem3, nodes, []) of
ClusterNodes when is_list(ClusterNodes) ->
run(Checks, ClusterNodes);
Error ->
[{node(), critical, weatherreport_runner, {checks_failed, Error}}]
end;
run(Checks, Nodes) ->
CheckOpts = get_check_options(),
lists:flatten(
lists:foldl(
fun(Mod, Acc) ->
{Resps, BadNodes} = weatherreport_node:multicall(
Nodes,
erlang,
apply,
[fun() -> {node(), weatherreport_check:check(Mod, CheckOpts)} end, []],
weatherreport_config:timeout()
),
TransformFailedCheck = fun(Node) ->
{node(), crit, weatherreport_runner, {check_failed, Mod, Node}}
end,
FailedChecks = [TransformFailedCheck(Node) || Node <- BadNodes],
TransformResponse = fun
({badrpc, Error}) ->
[{node(), crit, weatherreport_runner, {badrpc, Mod, Error}}];
({Node, Messages}) ->
[{Node, Lvl, Module, Msg} || {Lvl, Module, Msg} <- Messages]
end,
Responses = [TransformResponse(Resp) || Resp <- Resps],
[Responses ++ FailedChecks | Acc]
end,
[],
Checks
)
).
%% @doc Part of the weatherreport_check behaviour. This means that any messages
%% returned by this module can be handled via the existing message reporting
%% code.
format({checks_failed, Error}) ->
{"Could not run checks - received error: ~w", [Error]};
format({check_failed, Check, Node}) ->
{"Could not run check ~w on cluster node ~w", [Check, Node]};
format({badrpc, Check, Error}) ->
{"Bad rpc call executing check ~w: ~w", [Check, Error]}.
%% Private functions
get_check_options() ->
Expert =
case application:get_env(weatherreport, expert) of
{ok, true} ->
true;
_ ->
false
end,
[{expert, Expert}].
|
