File size: 4,276 Bytes
8da2481 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 | defmodule Plausible.Ingestion.Persistor.TelemetryHandler do
@moduledoc """
Sets up telemetry for remote calls to persistor via `Finch.Telemetry` events.
Emits persistor specific telemetry events for tracking metrics.
"""
@finch_request_event [:finch, :request, :stop]
@finch_connect_event [:finch, :connect, :stop]
@finch_send_event [:finch, :send, :stop]
@finch_receive_event [:finch, :recv, :stop]
@persistor_request_event [:persistor, :remote, :request]
@persistor_connect_event [:persistor, :remote, :connect]
@persistor_send_event [:persistor, :remote, :send]
@persistor_receive_event [:persistor, :remote, :receive]
@telemetry_events [
@finch_request_event,
@finch_connect_event,
@finch_send_event,
@finch_receive_event
]
@telemetry_handler &__MODULE__.handle_event/4
def request_event(), do: @persistor_request_event
def connect_event(), do: @persistor_connect_event
def send_event(), do: @persistor_send_event
def receive_event(), do: @persistor_receive_event
@spec install() :: :ok
def install() do
if persistor_backend() in [
Plausible.Ingestion.Persistor.Remote,
Plausible.Ingestion.Persistor.EmbeddedWithRelay
] do
persistor_host =
persistor_url()
|> URI.parse()
|> Map.fetch!(:host)
persistor_count = persistor_count()
if is_binary(persistor_host) do
:ok =
:telemetry.attach_many(
"persistor-remote-finch-metrics",
@telemetry_events,
@telemetry_handler,
%{remote_host: persistor_host, pool_size: persistor_count}
)
else
:ok
end
else
:ok
end
end
@spec handle_event([atom()], any(), map(), any()) :: :ok
def handle_event(
@finch_request_event,
%{duration: duration},
%{request: request, result: result},
config
) do
if request.host == config.remote_host do
result =
case result do
{:ok, %Finch.Response{status: status}} when status >= 200 and status < 300 ->
"ok"
{:ok, %Finch.Response{}} ->
"bad_status"
{:ok, _} ->
"stream"
{:error, %{reason: :timeout}} ->
"timeout_error"
{:error, _} ->
"unknown_error"
end
:telemetry.execute(
@persistor_request_event,
%{duration: duration},
%{result: result, path: normalize_path(request.path)}
)
end
:ok
end
def handle_event(
@finch_connect_event,
%{duration: duration},
%{host: host} = meta,
config
) do
if host == config.remote_host do
:telemetry.execute(
@persistor_connect_event,
%{duration: duration},
%{status: if(meta[:error], do: "error", else: "ok")}
)
end
:ok
end
def handle_event(
@finch_send_event,
%{duration: duration},
%{request: request} = meta,
config
) do
if request.host == config.remote_host do
:telemetry.execute(
@persistor_send_event,
%{duration: duration},
%{status: if(meta[:error], do: "error", else: "ok")}
)
end
:ok
end
def handle_event(
@finch_receive_event,
%{duration: duration},
%{request: request} = meta,
config
) do
if request.host == config.remote_host do
status = meta[:status] || 0
:telemetry.execute(
@persistor_receive_event,
%{duration: duration},
%{
status: if(meta[:error] || status < 200 || status > 299, do: "error", else: "ok")
}
)
end
:ok
end
defp normalize_path(path) do
if path == "/event" do
"/event"
else
"unknown"
end
end
defp persistor_url() do
:plausible
|> Application.fetch_env!(Plausible.Ingestion.Persistor.Remote)
|> Keyword.fetch!(:url)
end
defp persistor_backend() do
:plausible
|> Application.fetch_env!(Plausible.Ingestion.Persistor)
|> Keyword.fetch!(:backend)
end
defp persistor_count() do
:plausible
|> Application.fetch_env!(Plausible.Ingestion.Persistor.Remote)
|> Keyword.fetch!(:count)
end
end
|