defmodule Pleroma.Web.Telemetry do use Supervisor import Telemetry.Metrics alias Pleroma.Stats def start_link(arg) do Supervisor.start_link(__MODULE__, arg, name: __MODULE__) end @impl true def init(_arg) do children = [ {:telemetry_poller, measurements: periodic_measurements(), period: 10_000}, {TelemetryMetricsPrometheus, metrics: prometheus_metrics(), plug_cowboy_opts: [ip: {127, 0, 0, 1}]} ] Supervisor.init(children, strategy: :one_for_one) end @doc """ A seperate set of metrics for distributions because phoenix dashboard does NOT handle them well """ defp distribution_metrics do [ distribution( "phoenix.router_dispatch.stop.duration", # event_name: [:pleroma, :repo, :query, :total_time], measurement: :duration, unit: {:native, :second}, tags: [:route], reporter_options: [ buckets: [0.1, 0.2, 0.5, 1, 2.5, 5, 10, 25, 50, 100, 250, 500, 1000] ] ), # Database Time Metrics distribution( "pleroma.repo.query.total_time", # event_name: [:pleroma, :repo, :query, :total_time], measurement: :total_time, unit: {:native, :millisecond}, reporter_options: [ buckets: [0.1, 0.2, 0.5, 1, 2.5, 5, 10, 25, 50, 100, 250, 500, 1000] ] ), distribution( "pleroma.repo.query.queue_time", # event_name: [:pleroma, :repo, :query, :total_time], measurement: :queue_time, unit: {:native, :millisecond}, reporter_options: [ buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10] ] ), distribution( "oban_job_exception", event_name: [:oban, :job, :exception], measurement: :duration, tags: [:worker], tag_values: fn tags -> Map.put(tags, :worker, tags.job.worker) end, unit: {:native, :second}, reporter_options: [ buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10] ] ), distribution( "tesla_request_completed", event_name: [:tesla, :request, :stop], measurement: :duration, tags: [:response_code], tag_values: fn tags -> Map.put(tags, :response_code, tags.env.status) end, unit: {:native, :second}, reporter_options: [ buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10] ] ), distribution( "oban_job_completion", event_name: [:oban, :job, :stop], measurement: :duration, tags: [:worker], tag_values: fn tags -> Map.put(tags, :worker, tags.job.worker) end, unit: {:native, :second}, reporter_options: [ buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10] ] ) ] end defp summary_metrics do [ # Phoenix Metrics summary("phoenix.endpoint.stop.duration", unit: {:native, :millisecond} ), summary("phoenix.router_dispatch.stop.duration", tags: [:route], unit: {:native, :millisecond} ), summary("pleroma.repo.query.total_time", unit: {:native, :millisecond}), summary("pleroma.repo.query.decode_time", unit: {:native, :millisecond}), summary("pleroma.repo.query.query_time", unit: {:native, :millisecond}), summary("pleroma.repo.query.queue_time", unit: {:native, :millisecond}), summary("pleroma.repo.query.idle_time", unit: {:native, :millisecond}), # VM Metrics summary("vm.memory.total", unit: {:byte, :kilobyte}), summary("vm.total_run_queue_lengths.total"), summary("vm.total_run_queue_lengths.cpu"), summary("vm.total_run_queue_lengths.io"), last_value("pleroma.local_users.total"), last_value("pleroma.domains.total"), last_value("pleroma.local_statuses.total") ] end def prometheus_metrics, do: summary_metrics() ++ distribution_metrics() def live_dashboard_metrics, do: summary_metrics() defp periodic_measurements do [ {__MODULE__, :instance_stats, []} ] end def instance_stats do stats = Stats.get_stats() :telemetry.execute([:pleroma, :local_users], %{total: stats.user_count}, %{}) :telemetry.execute([:pleroma, :domains], %{total: stats.domain_count}, %{}) :telemetry.execute([:pleroma, :local_statuses], %{total: stats.status_count}, %{}) end end