| 1 | -module(beam_stats_consumer_statsd). |
| 2 | |
| 3 | -include("include/beam_stats.hrl"). |
| 4 | -include("include/beam_stats_ets_table.hrl"). |
| 5 | -include("beam_stats_logging.hrl"). |
| 6 | |
| 7 | -behaviour(beam_stats_consumer). |
| 8 | |
| 9 | -export_type( |
| 10 | [ option/0 |
| 11 | ]). |
| 12 | |
| 13 | %% Consumer interface |
| 14 | -export( |
| 15 | [ init/1 |
| 16 | , consume/2 |
| 17 | , terminate/1 |
| 18 | ]). |
| 19 | |
| 20 | -type option() :: |
| 21 | {consumption_interval , non_neg_integer()} |
| 22 | | {dst_host , inet:ip_address() | inet:hostname()} |
| 23 | | {dst_port , inet:port_number()} |
| 24 | | {src_port , inet:port_number()} |
| 25 | | {num_msgs_per_packet , non_neg_integer()} |
| 26 | . |
| 27 | |
| 28 | -define(DEFAULT_DST_HOST, "localhost"). |
| 29 | -define(DEFAULT_DST_PORT, 8125). |
| 30 | -define(DEFAULT_SRC_PORT, 8124). |
| 31 | |
| 32 | -type metric_type() :: |
| 33 | % TODO: Add other metric types |
| 34 | gauge. |
| 35 | |
| 36 | -record(statsd_msg, |
| 37 | { name :: binary() |
| 38 | , value :: non_neg_integer() |
| 39 | , type :: metric_type() |
| 40 | }). |
| 41 | |
| 42 | -type statsd_msg() :: |
| 43 | #statsd_msg{}. |
| 44 | |
| 45 | -record(state, |
| 46 | { sock :: hope_option:t(gen_udp:socket()) |
| 47 | , dst_host :: inet:ip_address() | inet:hostname() |
| 48 | , dst_port :: inet:port_number() |
| 49 | , src_port :: inet:port_number() |
| 50 | , num_msgs_per_packet :: non_neg_integer() |
| 51 | }). |
| 52 | |
| 53 | -type state() :: |
| 54 | #state{}. |
| 55 | |
| 56 | -define(PATH_PREFIX, "beam_stats"). |
| 57 | |
| 58 | %% ============================================================================ |
| 59 | %% Consumer implementation |
| 60 | %% ============================================================================ |
| 61 | |
| 62 | -spec init([option()]) -> |
| 63 | {non_neg_integer(), state()}. |
| 64 | init(Options) -> |
| 65 | ConsumptionInterval = hope_kv_list:get(Options, consumption_interval, 60000), |
| 66 | DstHost = hope_kv_list:get(Options, dst_host, ?DEFAULT_DST_HOST), |
| 67 | DstPort = hope_kv_list:get(Options, dst_port, ?DEFAULT_DST_PORT), |
| 68 | SrcPort = hope_kv_list:get(Options, src_port, ?DEFAULT_SRC_PORT), |
| 69 | NumMsgsPerPacket = hope_kv_list:get(Options, num_msgs_per_packet, 10), |
| 70 | State = #state |
| 71 | { sock = none |
| 72 | , dst_host = DstHost |
| 73 | , dst_port = DstPort |
| 74 | , src_port = SrcPort |
| 75 | , num_msgs_per_packet = NumMsgsPerPacket |
| 76 | }, |
| 77 | {ConsumptionInterval, State}. |
| 78 | |
| 79 | -spec consume(beam_stats_consumer:queue(), state()) -> |
| 80 | state(). |
| 81 | consume(Q, #state{num_msgs_per_packet=NumMsgsPerPacket}=State) -> |
| 82 | Packets = beam_stats_queue_to_packets(Q, NumMsgsPerPacket), |
| 83 | lists:foldl(fun try_to_connect_and_send/2, State, Packets). |
| 84 | |
| 85 | -spec terminate(state()) -> |
| 86 | {}. |
| 87 | terminate(#state{sock=SockOpt}) -> |
| 88 | ok = hope_option:iter(SockOpt, fun gen_udp:close/1), |
| 89 | {}. |
| 90 | |
| 91 | %% ============================================================================ |
| 92 | %% Transport |
| 93 | %% ============================================================================ |
| 94 | |
| 95 | -spec try_to_connect_and_send(binary(), state()) -> |
| 96 | state(). |
| 97 | try_to_connect_and_send(<<Payload/binary>>, #state{}=State1) -> |
| 98 | State2 = try_to_connect_if_no_socket(State1), |
| 99 | try_to_send(State2, Payload). |
| 100 | |
| 101 | -spec try_to_send(state(), binary()) -> |
| 102 | state(). |
| 103 | try_to_send(#state{sock=none}=State, _) -> |
| 104 | ?log_error("Sending failed. No socket in state."), |
| 105 | % TODO: Maybe schedule retry? |
| 106 | State; |
| 107 | try_to_send( |
| 108 | #state |
| 109 | { sock = {some, Sock} |
| 110 | , dst_host = DstHost |
| 111 | , dst_port = DstPort |
| 112 | }=State, |
| 113 | Payload |
| 114 | ) -> |
| 115 | case gen_udp:send(Sock, DstHost, DstPort, Payload) |
| 116 | of ok -> |
| 117 | State |
| 118 | ; {error, _}=Error -> |
| 119 | ?log_error( |
| 120 | "gen_udp:send(~p, ~p, ~p, ~p) -> ~p", |
| 121 | [Sock, DstHost, DstPort, Error] |
| 122 | ), |
| 123 | % TODO: Do something with unsent messages? |
| 124 | ok = gen_udp:close(Sock), |
| 125 | State#state{sock=none} |
| 126 | end. |
| 127 | |
| 128 | -spec try_to_connect_if_no_socket(state()) -> |
| 129 | state(). |
| 130 | try_to_connect_if_no_socket(#state{sock={some, _}}=State) -> |
| 131 | State; |
| 132 | try_to_connect_if_no_socket(#state{sock=none, src_port=SrcPort}=State) -> |
| 133 | case gen_udp:open(SrcPort) |
| 134 | of {ok, Sock} -> |
| 135 | State#state{sock = {some, Sock}} |
| 136 | ; {error, _}=Error -> |
| 137 | ?log_error("gen_udp:open(~p) -> ~p", [SrcPort, Error]), |
| 138 | State#state{sock = none} |
| 139 | end. |
| 140 | |
| 141 | %% ============================================================================ |
| 142 | %% Serialization |
| 143 | %% ============================================================================ |
| 144 | |
| 145 | -spec beam_stats_queue_to_packets(beam_stats_consumer:queue(), non_neg_integer()) -> |
| 146 | [binary()]. |
| 147 | beam_stats_queue_to_packets(Q, NumMsgsPerPacket) -> |
| 148 | MsgBins = lists:append([beam_stats_to_bins(B) || B <- queue:to_list(Q)]), |
| 149 | MsgBinsChucks = hope_list:divide(MsgBins, NumMsgsPerPacket), |
| 150 | lists:map(fun erlang:iolist_to_binary/1, MsgBinsChucks). |
| 151 | |
| 152 | -spec beam_stats_to_bins(beam_stats:t()) -> |
| 153 | [binary()]. |
| 154 | beam_stats_to_bins(#beam_stats |
| 155 | { node_id = NodeID |
| 156 | , memory = Memory |
| 157 | , io_bytes_in = IOBytesIn |
| 158 | , io_bytes_out = IOBytesOut |
| 159 | , context_switches = ContextSwitches |
| 160 | , reductions = Reductions |
| 161 | , run_queue = RunQueue |
| 162 | , ets = ETS |
| 163 | } |
| 164 | ) -> |
| 165 | NodeIDBin = node_id_to_bin(NodeID), |
| 166 | Msgs1 = |
| 167 | [ io_bytes_in_to_msg(IOBytesIn) |
| 168 | , io_bytes_out_to_msg(IOBytesOut) |
| 169 | , context_switches_to_msg(ContextSwitches) |
| 170 | , reductions_to_msg(Reductions) |
| 171 | , run_queue_to_msg(RunQueue) |
| 172 | | memory_to_msgs(Memory) |
| 173 | ] |
| 174 | ++ ets_to_msgs(ETS), |
| 175 | Msgs2 = [statsd_msg_add_name_prefix(M, NodeIDBin) || M <- Msgs1], |
| 176 | [statsd_msg_to_bin(M) || M <- Msgs2]. |
| 177 | |
| 178 | -spec run_queue_to_msg(non_neg_integer()) -> |
| 179 | statsd_msg(). |
| 180 | run_queue_to_msg(RunQueue) -> |
| 181 | #statsd_msg |
| 182 | { name = <<"run_queue">> |
| 183 | , value = RunQueue |
| 184 | , type = gauge |
| 185 | }. |
| 186 | |
| 187 | -spec reductions_to_msg(non_neg_integer()) -> |
| 188 | statsd_msg(). |
| 189 | reductions_to_msg(Reductions) -> |
| 190 | #statsd_msg |
| 191 | { name = <<"reductions">> |
| 192 | , value = Reductions |
| 193 | , type = gauge |
| 194 | }. |
| 195 | |
| 196 | -spec context_switches_to_msg(non_neg_integer()) -> |
| 197 | statsd_msg(). |
| 198 | context_switches_to_msg(ContextSwitches) -> |
| 199 | #statsd_msg |
| 200 | { name = <<"context_switches">> |
| 201 | , value = ContextSwitches |
| 202 | , type = gauge |
| 203 | }. |
| 204 | |
| 205 | -spec io_bytes_in_to_msg(non_neg_integer()) -> |
| 206 | statsd_msg(). |
| 207 | io_bytes_in_to_msg(IOBytesIn) -> |
| 208 | #statsd_msg |
| 209 | { name = <<"io.bytes_in">> |
| 210 | , value = IOBytesIn |
| 211 | , type = gauge |
| 212 | }. |
| 213 | |
| 214 | -spec io_bytes_out_to_msg(non_neg_integer()) -> |
| 215 | statsd_msg(). |
| 216 | io_bytes_out_to_msg(IOBytesOut) -> |
| 217 | #statsd_msg |
| 218 | { name = <<"io.bytes_out">> |
| 219 | , value = IOBytesOut |
| 220 | , type = gauge |
| 221 | }. |
| 222 | |
| 223 | -spec ets_to_msgs(beam_stats_ets:t()) -> |
| 224 | [statsd_msg()]. |
| 225 | ets_to_msgs(PerTableStats) -> |
| 226 | NestedMsgs = lists:map(fun ets_table_to_msgs/1, PerTableStats), |
| 227 | lists:append(NestedMsgs). |
| 228 | |
| 229 | -spec ets_table_to_msgs(beam_stats_ets_table:t()) -> |
| 230 | [statsd_msg()]. |
| 231 | ets_table_to_msgs(#beam_stats_ets_table |
| 232 | { id = ID |
| 233 | , name = Name |
| 234 | , size = Size |
| 235 | , memory = Memory |
| 236 | } |
| 237 | ) -> |
| 238 | IDBin = beam_stats_ets_table:id_to_bin(ID), |
| 239 | NameBin = atom_to_binary(Name, latin1), |
| 240 | NameAndID = <<NameBin/binary, ".", IDBin/binary>>, |
| 241 | SizeMsg = |
| 242 | #statsd_msg |
| 243 | { name = <<"ets_table.size.", NameAndID/binary>> |
| 244 | , value = Size |
| 245 | , type = gauge |
| 246 | }, |
| 247 | MemoryMsg = |
| 248 | #statsd_msg |
| 249 | { name = <<"ets_table.memory.", NameAndID/binary>> |
| 250 | , value = Memory |
| 251 | , type = gauge |
| 252 | }, |
| 253 | [SizeMsg, MemoryMsg]. |
| 254 | |
| 255 | -spec memory_to_msgs([{atom(), non_neg_integer()}]) -> |
| 256 | [statsd_msg()]. |
| 257 | memory_to_msgs(Memory) -> |
| 258 | [memory_component_to_statsd_msg(MC) || MC <- Memory]. |
| 259 | |
| 260 | -spec memory_component_to_statsd_msg({atom(), non_neg_integer()}) -> |
| 261 | statsd_msg(). |
| 262 | memory_component_to_statsd_msg({MemType, MemSize}) when MemSize >= 0 -> |
| 263 | MemTypeBin = atom_to_binary(MemType, latin1), |
| 264 | #statsd_msg |
| 265 | { name = <<"memory.", MemTypeBin/binary>> |
| 266 | , value = MemSize |
| 267 | , type = gauge |
| 268 | }. |
| 269 | |
| 270 | -spec statsd_msg_add_name_prefix(statsd_msg(), binary()) -> |
| 271 | statsd_msg(). |
| 272 | statsd_msg_add_name_prefix(#statsd_msg{name=Name1}=Msg, <<NodeID/binary>>) -> |
| 273 | Prefix = <<?PATH_PREFIX, ".", NodeID/binary, ".">>, |
| 274 | Name2 = <<Prefix/binary, Name1/binary>>, |
| 275 | Msg#statsd_msg{name=Name2}. |
| 276 | |
| 277 | -spec statsd_msg_to_bin(statsd_msg()) -> |
| 278 | binary(). |
| 279 | statsd_msg_to_bin( |
| 280 | #statsd_msg |
| 281 | { name = <<Name/binary>> |
| 282 | , value = Value |
| 283 | , type = Type = gauge |
| 284 | } |
| 285 | ) when Value >= 0 -> |
| 286 | TypeBin = metric_type_to_bin(Type), |
| 287 | ValueBin = integer_to_binary(Value), |
| 288 | << Name/binary |
| 289 | , ":" |
| 290 | , ValueBin/binary |
| 291 | , "|" |
| 292 | , TypeBin/binary |
| 293 | , "\n" |
| 294 | >>. |
| 295 | |
| 296 | -spec metric_type_to_bin(metric_type()) -> |
| 297 | binary(). |
| 298 | metric_type_to_bin(gauge) -> |
| 299 | <<"g">>. |
| 300 | |
| 301 | -spec node_id_to_bin(node()) -> |
| 302 | binary(). |
| 303 | node_id_to_bin(NodeID) -> |
| 304 | NodeIDBin = atom_to_binary(NodeID, utf8), |
| 305 | re:replace(NodeIDBin, "[\@\.]", "_", [global, {return, binary}]). |