91 lines
2.8 KiB
Elixir
91 lines
2.8 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Telemetry.Logger do
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@moduledoc "Transforms Pleroma telemetry events to logs"
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require Logger
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@events [
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[:pleroma, :connection_pool, :reclaim, :start],
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[:pleroma, :connection_pool, :reclaim, :stop],
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[:pleroma, :connection_pool, :provision_failure],
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[:pleroma, :connection_pool, :client, :dead],
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[:pleroma, :connection_pool, :client, :add]
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]
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def attach do
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:telemetry.attach_many("pleroma-logger", @events, &handle_event/4, [])
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end
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# Passing anonymous functions instead of strings to logger is intentional,
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# that way strings won't be concatenated if the message is going to be thrown
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# out anyway due to higher log level configured
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def handle_event(
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[:pleroma, :connection_pool, :reclaim, :start],
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_,
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%{max_connections: max_connections, reclaim_max: reclaim_max},
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_
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) do
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Logger.debug(fn ->
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"Connection pool is exhausted (reached #{max_connections} connections). Starting idle connection cleanup to reclaim as much as #{reclaim_max} connections"
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end)
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end
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def handle_event(
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[:pleroma, :connection_pool, :reclaim, :stop],
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%{reclaimed_count: 0},
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_,
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_
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) do
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Logger.error(fn ->
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"Connection pool failed to reclaim any connections due to all of them being in use. It will have to drop requests for opening connections to new hosts"
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end)
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end
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def handle_event(
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[:pleroma, :connection_pool, :reclaim, :stop],
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%{reclaimed_count: reclaimed_count},
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_,
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_
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) do
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Logger.debug(fn -> "Connection pool cleaned up #{reclaimed_count} idle connections" end)
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end
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def handle_event(
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[:pleroma, :connection_pool, :provision_failure],
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%{opts: [key | _]},
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_,
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_
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) do
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Logger.error(fn ->
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"Connection pool had to refuse opening a connection to #{key} due to connection limit exhaustion"
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end)
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end
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def handle_event(
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[:pleroma, :connection_pool, :client, :dead],
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%{client_pid: client_pid, reason: reason},
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%{key: key},
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_
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) do
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Logger.warn(fn ->
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"Pool worker for #{key}: Client #{inspect(client_pid)} died before releasing the connection with #{inspect(reason)}"
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end)
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end
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def handle_event(
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[:pleroma, :connection_pool, :client, :add],
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%{clients: [_, _ | _] = clients},
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%{key: key, protocol: :http},
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_
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) do
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Logger.info(fn ->
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"Pool worker for #{key}: #{length(clients)} clients are using an HTTP1 connection at the same time, head-of-line blocking might occur."
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end)
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end
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def handle_event([:pleroma, :connection_pool, :client, :add], _, _, _), do: :ok
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end
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