239 lines
7.6 KiB
Elixir
239 lines
7.6 KiB
Elixir
defmodule Pleroma.Web.Telemetry do
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use Supervisor
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import Telemetry.Metrics
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alias Pleroma.Stats
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alias Pleroma.Config
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def start_link(arg) do
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Supervisor.start_link(__MODULE__, arg, name: __MODULE__)
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end
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@impl true
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def init(_arg) do
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children =
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[
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{:telemetry_poller, measurements: periodic_measurements(), period: 10_000}
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] ++
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prometheus_children()
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Supervisor.init(children, strategy: :one_for_one)
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end
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defp prometheus_children do
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config = Config.get([:instance, :export_prometheus_metrics], true)
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if config do
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[
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{TelemetryMetricsPrometheus.Core, metrics: prometheus_metrics()},
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Pleroma.PrometheusExporter
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]
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else
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[]
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end
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end
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# A seperate set of metrics for distributions because phoenix dashboard does NOT handle them well
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defp distribution_metrics do
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[
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distribution(
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"phoenix.router_dispatch.stop.duration",
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# event_name: [:pleroma, :repo, :query, :total_time],
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measurement: :duration,
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unit: {:native, :second},
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tags: [:route],
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reporter_options: [
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buckets: [0.1, 0.2, 0.5, 1, 2.5, 5, 10, 25, 50, 100, 250, 500, 1000]
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]
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),
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# Database Time Metrics
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distribution(
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"pleroma.repo.query.total_time",
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# event_name: [:pleroma, :repo, :query, :total_time],
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measurement: :total_time,
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unit: {:native, :millisecond},
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reporter_options: [
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buckets: [0.1, 0.2, 0.5, 1, 2.5, 5, 10, 25, 50, 100, 250, 500, 1000]
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]
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),
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distribution(
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"pleroma.repo.query.queue_time",
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# event_name: [:pleroma, :repo, :query, :total_time],
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measurement: :queue_time,
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unit: {:native, :millisecond},
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reporter_options: [
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buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10]
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]
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),
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distribution(
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"oban_job_exception",
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event_name: [:oban, :job, :exception],
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measurement: :duration,
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tags: [:worker],
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tag_values: fn tags -> Map.put(tags, :worker, tags.job.worker) end,
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unit: {:native, :second},
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reporter_options: [
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buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10]
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]
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),
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distribution(
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"tesla_request_completed",
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event_name: [:tesla, :request, :stop],
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measurement: :duration,
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tags: [:response_code],
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tag_values: fn tags -> Map.put(tags, :response_code, tags.env.status) end,
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unit: {:native, :second},
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reporter_options: [
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buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10]
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]
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),
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distribution(
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"oban_job_completion",
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event_name: [:oban, :job, :stop],
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measurement: :duration,
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tags: [:worker],
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tag_values: fn tags -> Map.put(tags, :worker, tags.job.worker) end,
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unit: {:native, :second},
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reporter_options: [
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buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10]
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]
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)
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]
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end
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# Summary metrics are currently not (yet) supported by the prometheus exporter
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defp summary_metrics(byte_unit) do
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[
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# Phoenix Metrics
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summary("phoenix.endpoint.stop.duration",
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unit: {:native, :millisecond}
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),
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summary("phoenix.router_dispatch.stop.duration",
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tags: [:route],
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unit: {:native, :millisecond}
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),
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summary("pleroma.repo.query.total_time", unit: {:native, :millisecond}),
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summary("pleroma.repo.query.decode_time", unit: {:native, :millisecond}),
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summary("pleroma.repo.query.query_time", unit: {:native, :millisecond}),
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summary("pleroma.repo.query.queue_time", unit: {:native, :millisecond}),
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summary("pleroma.repo.query.idle_time", unit: {:native, :millisecond}),
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# VM Metrics
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summary("vm.memory.total", unit: {:byte, byte_unit}),
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summary("vm.total_run_queue_lengths.total"),
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summary("vm.total_run_queue_lengths.cpu"),
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summary("vm.total_run_queue_lengths.io")
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]
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end
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defp sum_counter_pair(basename, opts) do
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[
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sum(basename <> ".psum", opts),
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counter(basename <> ".pcount", opts)
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]
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end
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# Prometheus exporter doesn't support summaries, so provide fallbacks
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defp summary_fallback_metrics(byte_unit \\ :byte) do
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# Summary metrics are not supported by the Prometheus exporter
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# https://github.com/beam-telemetry/telemetry_metrics_prometheus_core/issues/11
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# and sum metrics currently only work with integers
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# https://github.com/beam-telemetry/telemetry_metrics_prometheus_core/issues/35
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#
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# For VM metrics this is kindof ok as they appear to always be integers
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# and we can use sum + counter to get the average between polls from their change
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# But for repo query times we need to use a full distribution
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simple_buckets = [0, 1, 2, 4, 8, 16]
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simple_buckets_quick = for t <- simple_buckets, do: t / 100.0
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# Already included in distribution metrics anyway:
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# phoenix.router_dispatch.stop.duration
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# pleroma.repo.query.total_time
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# pleroma.repo.query.queue_time
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dist_metrics = [
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distribution("phoenix.endpoint.stop.duration.fdist",
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event_name: [:phoenix, :endpoint, :stop],
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measurement: :duration,
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unit: {:native, :millisecond},
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reporter_options: [
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buckets: simple_buckets
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]
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),
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distribution("pleroma.repo.query.decode_time.fdist",
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event_name: [:pleroma, :repo, :query],
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measurement: :decode_time,
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unit: {:native, :millisecond},
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reporter_options: [
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buckets: simple_buckets_quick
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]
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),
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distribution("pleroma.repo.query.query_time.fdist",
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event_name: [:pleroma, :repo, :query],
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measurement: :query_time,
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unit: {:native, :millisecond},
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reporter_options: [
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buckets: simple_buckets
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]
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),
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distribution("pleroma.repo.query.idle_time.fdist",
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event_name: [:pleroma, :repo, :query],
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measurement: :idle_time,
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unit: {:native, :millisecond},
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reporter_options: [
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buckets: simple_buckets
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]
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)
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]
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vm_metrics =
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sum_counter_pair("vm.memory.total",
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event_name: [:vm, :memory],
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measurement: :total,
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unit: {:byte, byte_unit}
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) ++
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sum_counter_pair("vm.total_run_queue_lengths.total",
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event_name: [:vm, :total_run_queue_lengths],
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measurement: :total
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) ++
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sum_counter_pair("vm.total_run_queue_lengths.cpu",
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event_name: [:vm, :total_run_queue_lengths],
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measurement: :cpu
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) ++
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sum_counter_pair("vm.total_run_queue_lengths.io.fsum",
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event_name: [:vm, :total_run_queue_lengths],
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measurement: :io
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)
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dist_metrics ++ vm_metrics
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end
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defp common_metrics do
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[
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last_value("pleroma.local_users.total"),
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last_value("pleroma.domains.total"),
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last_value("pleroma.local_statuses.total"),
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last_value("pleroma.remote_users.total")
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]
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end
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def prometheus_metrics,
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do: common_metrics() ++ distribution_metrics() ++ summary_fallback_metrics()
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def live_dashboard_metrics, do: common_metrics() ++ summary_metrics(:megabyte)
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defp periodic_measurements do
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[
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{__MODULE__, :instance_stats, []}
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]
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end
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def instance_stats do
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stats = Stats.get_stats()
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:telemetry.execute([:pleroma, :local_users], %{total: stats.user_count}, %{})
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:telemetry.execute([:pleroma, :domains], %{total: stats.domain_count}, %{})
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:telemetry.execute([:pleroma, :local_statuses], %{total: stats.status_count}, %{})
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:telemetry.execute([:pleroma, :remote_users], %{total: stats.remote_user_count}, %{})
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end
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end
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