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Move functions into mongoose_metrics_api
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| -module(mongoose_metrics_api). | ||
| -export([get_metrics/1, | ||
| get_metrics_as_dicts/2, | ||
| get_cluster_metrics_as_dicts/3]). | ||
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| -include("mongoose_logger.hrl"). | ||
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| -type name() :: [atom() | integer()]. | ||
| -type key() :: atom(). | ||
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| -spec get_metrics(Name :: name()) -> {ok, list()}. | ||
| get_metrics(Name) -> | ||
| Values = exometer:get_values(Name), | ||
| {ok, lists:map(fun make_metric_result/1, Values)}. | ||
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| -spec get_metrics_as_dicts(Name :: name(), Keys :: [key()]) -> {ok, list()}. | ||
| get_metrics_as_dicts(Name, Keys) -> | ||
| Values = exometer:get_values(Name), | ||
| {ok, [make_metric_dict_result(V, Keys) || V <- Values]}. | ||
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| -spec get_cluster_metrics_as_dicts(Name :: name(), Keys :: [key()], | ||
| Nodes :: [node()]) -> {ok, list()}. | ||
| get_cluster_metrics_as_dicts(Name, Keys, Nodes) -> | ||
| Nodes2 = existing_nodes(Nodes), | ||
| F = fun(Node) -> rpc:call(Node, exometer, get_values, [Name]) end, | ||
| Results = mongoose_lib:pmap(F, Nodes2), | ||
| {ok, [make_node_result(Node, Result, Keys) | ||
| || {Node, Result} <- lists:zip(Nodes2, Results)]}. | ||
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| make_node_result(Node, {ok, Values}, Keys) -> | ||
| {ok, #{<<"node">> => Node, | ||
| <<"result">> => [make_metric_dict_result(V, Keys) || V <- Values]}}; | ||
| make_node_result(Node, Other, _Keys) -> | ||
| ?LOG_ERROR(#{what => metric_get_failed, | ||
| remote_node => Node, reason => Other}), | ||
| {error, <<"Failed to get metrics">>}. | ||
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| filter_keys(Dict, []) -> | ||
| Dict; | ||
| filter_keys(Dict, Keys) -> | ||
| [KV || KV = {Key, _} <- Dict, lists:member(Key, Keys)]. | ||
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| existing_nodes(Nodes) -> | ||
| AllNodes = [node()|nodes()], | ||
| filter_nodes(AllNodes, Nodes). | ||
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| filter_nodes(AllNodes, []) -> | ||
| AllNodes; | ||
| filter_nodes(AllNodes, AllowedNodes) -> | ||
| [Node || Node <- AllNodes, lists:member(Node, AllowedNodes)]. | ||
|
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| make_metric_result({Name, Dict}) -> | ||
| PreparedName = format_name(Name), | ||
| Map = format_dict(Dict), | ||
| {ok, Map#{<<"name">> => PreparedName}}. | ||
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| make_metric_dict_result({Name, Dict}, Keys) -> | ||
| PreparedName = format_name(Name), | ||
| {ok, #{<<"name">> => PreparedName, <<"dict">> => format_dict_entries(Dict, Keys)}}. | ||
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| format_dict_entries(Dict, Keys) -> | ||
| [{ok, #{<<"key">> => Key, <<"value">> => Value}} | ||
| || {Key, Value} <- filter_keys(Dict, Keys)]. | ||
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| format_name(Name) -> | ||
| lists:map(fun format_name_segment/1, Name). | ||
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| format_name_segment(Segment) when is_atom(Segment) -> | ||
| {ok, atom_to_binary(Segment)}; | ||
| format_name_segment(Segment) when is_binary(Segment) -> | ||
| {ok, Segment}. | ||
|
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| format_dict(Dict) -> | ||
| format_dict2(maps:from_list(Dict)). | ||
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| format_dict2(#{one := _} = Dict) -> | ||
| format_spiral(Dict); | ||
| format_dict2(#{ms_since_reset := _} = Dict) -> | ||
| format_counter(Dict); | ||
| format_dict2(#{value := _} = Dict) -> | ||
| format_gauge(Dict); | ||
| format_dict2(#{median := _} = Dict) -> | ||
| format_histogram(Dict); | ||
| format_dict2(#{connections := _, recv_cnt := _} = Dict) -> | ||
| format_merged_inet_stats(Dict); | ||
| format_dict2(#{processes_used := _} = Dict) -> | ||
| format_vm_stats_memory(Dict); | ||
| format_dict2(#{port_count := _} = Dict) -> | ||
| format_vm_system_info(Dict); | ||
| format_dict2(#{fsm := _, regular := _} = Dict) -> | ||
| format_probe_queues(Dict); | ||
| format_dict2(#{recv_cnt := _, workers := _} = Dict) -> | ||
| format_rdbms_stats(Dict). | ||
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| format_spiral(#{one := One, count := Count}) -> | ||
| #{<<"type">> => <<"spiral">>, <<"one">> => One, <<"count">> => Count}. | ||
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| format_counter(#{value := Value, ms_since_reset := MS}) -> | ||
| #{<<"type">> => <<"counter">>, <<"value">> => Value, <<"ms_since_reset">> => MS}. | ||
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| format_gauge(#{value := Value}) -> | ||
| #{<<"type">> => <<"gauge">>, <<"value">> => Value}. | ||
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| format_histogram(#{n := N, mean := Mean, min := Min, max := Max, median := Median, | ||
| 50 := P50, 75 := P75, 90 := P90, 95 := P95, | ||
| 99 := P99, 999 := P999}) -> | ||
| #{<<"type">> => <<"histogram">>, <<"n">> => N, <<"mean">> => Mean, | ||
| <<"min">> => Min, <<"max">> => Max, <<"median">> => Median, | ||
| <<"p50">> => P50, <<"p75">> => P75, <<"p90">> => P90, <<"p95">> => P95, | ||
| <<"p99">> => P99, <<"p999">> => P999}. | ||
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| format_merged_inet_stats(#{connections := Cons, | ||
| recv_cnt := RCnt, recv_max := RMax, recv_oct := ROct, | ||
| send_cnt := SCnt, send_max := SMax, send_oct := SOct, | ||
| send_pend := SPend}) -> | ||
| %% Metrics from a pool of connections | ||
| #{<<"type">> => <<"merged_inet_stats">>, <<"connections">> => Cons, | ||
| <<"recv_cnt">> => RCnt, <<"recv_max">> => RMax, <<"recv_oct">> => ROct, | ||
| <<"send_cnt">> => SCnt, <<"send_max">> => SMax, <<"send_oct">> => SOct, | ||
| <<"send_pend">> => SPend}. | ||
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| format_rdbms_stats(#{recv_cnt := RCnt, recv_max := RMax, recv_oct := ROct, | ||
| send_cnt := SCnt, send_max := SMax, send_oct := SOct, | ||
| send_pend := SPend, workers := Workers}) -> | ||
| #{<<"type">> => <<"rdbms_stats">>, <<"workers">> => Workers, | ||
| <<"recv_cnt">> => RCnt, <<"recv_max">> => RMax, <<"recv_oct">> => ROct, | ||
| <<"send_cnt">> => SCnt, <<"send_max">> => SMax, <<"send_oct">> => SOct, | ||
| <<"send_pend">> => SPend}. | ||
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| format_vm_stats_memory(#{total := Total, processes_used := P, | ||
| atom_used := A, binary := B, ets := E, system := S}) -> | ||
| #{<<"type">> => <<"vm_stats_memory">>, | ||
| <<"total">> => Total, <<"processes_used">> => P, <<"atom_used">> => A, | ||
| <<"binary">> => B, <<"ets">> => E, <<"system">> => S}. | ||
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| format_vm_system_info(#{port_count := PortCount, port_limit := PortLimit, | ||
| process_count := ProcessCount, process_limit := ProcessLimit, | ||
| ets_limit := EtsLimit}) -> | ||
| #{<<"type">> => <<"vm_system_info">>, | ||
| <<"port_count">> => PortCount, <<"port_limit">> => PortLimit, | ||
| <<"process_count">> => ProcessCount, <<"process_limit">> => ProcessLimit, | ||
| <<"ets_limit">> => EtsLimit}. | ||
|
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| format_probe_queues(#{fsm := FSM, regular := Regular, total := Total}) -> | ||
| #{<<"type">> => <<"probe_queues">>, | ||
| <<"fsm">> => FSM, <<"regular">> => Regular, <<"total">> => Total}. |