Claudio Ortolina
122 lines
3.3 KiB
Elixir
122 lines
3.3 KiB
Elixir
defmodule MusicLibraryWeb.Telemetry do
|
|
use Supervisor
|
|
|
|
import Telemetry.Metrics
|
|
|
|
def start_link(arg) do
|
|
Supervisor.start_link(__MODULE__, arg, name: __MODULE__)
|
|
end
|
|
|
|
@impl true
|
|
def init(_arg) do
|
|
children = [
|
|
{MusicLibraryWeb.Telemetry.Storage, metrics()},
|
|
# Telemetry poller will execute the given period measurements
|
|
# every 30 seconds. Learn more here: https://hexdocs.pm/telemetry_metrics
|
|
{:telemetry_poller, measurements: periodic_measurements(), period: 30_000}
|
|
# Add reporters as children of your supervision tree.
|
|
# {Telemetry.Metrics.ConsoleReporter, metrics: metrics()}
|
|
]
|
|
|
|
Supervisor.init(children, strategy: :one_for_one)
|
|
end
|
|
|
|
def metrics do
|
|
[
|
|
# Database Metrics
|
|
summary("music_library.repo.query.total_time",
|
|
unit: {:native, :millisecond},
|
|
description: "The sum of the other measurements",
|
|
reporter_options: [
|
|
nav: "Repo"
|
|
],
|
|
tags: [:source]
|
|
),
|
|
summary("music_library.repo.query.query_time",
|
|
unit: {:native, :millisecond},
|
|
description: "The time spent executing the query",
|
|
reporter_options: [
|
|
nav: "Repo"
|
|
],
|
|
tags: [:source]
|
|
),
|
|
summary("music_library.repo.query.queue_time",
|
|
unit: {:native, :millisecond},
|
|
description: "The time spent waiting for a database connection",
|
|
reporter_options: [
|
|
nav: "Repo"
|
|
],
|
|
tags: [:source]
|
|
),
|
|
|
|
# Oban
|
|
summary("oban.job.stop.duration",
|
|
unit: {:native, :millisecond},
|
|
tags: [:state],
|
|
reporter_options: [
|
|
nav: "Oban"
|
|
]
|
|
),
|
|
|
|
# HTTP Metrics
|
|
summary("finch.request.stop.duration",
|
|
unit: {:native, :millisecond},
|
|
tags: [:normalized_path],
|
|
tag_values: &add_tags/1,
|
|
drop: &drop_archive_requests/1,
|
|
reporter_options: [
|
|
nav: "External APIs"
|
|
]
|
|
),
|
|
summary("finch.request.stop.duration",
|
|
unit: {:native, :millisecond},
|
|
tags: [:host],
|
|
tag_values: &add_tags/1,
|
|
drop: &drop_archive_requests/1,
|
|
reporter_options: [
|
|
nav: "External APIs"
|
|
]
|
|
),
|
|
|
|
# Assets
|
|
summary("music_library.assets.cache_size",
|
|
unit: {:byte, :kilobyte},
|
|
reporter_options: [nav: "Assets"]
|
|
),
|
|
summary("music_library.assets.content_size",
|
|
unit: {:byte, :megabyte},
|
|
reporter_options: [nav: "Assets"]
|
|
),
|
|
|
|
# VM Metrics
|
|
summary("vm.memory.total", unit: {:byte, :megabyte}),
|
|
summary("vm.total_run_queue_lengths.total"),
|
|
summary("vm.total_run_queue_lengths.cpu"),
|
|
summary("vm.total_run_queue_lengths.io")
|
|
]
|
|
end
|
|
|
|
defp periodic_measurements do
|
|
[
|
|
{MusicLibrary.Assets, :track_total_cache_size, []},
|
|
{MusicLibrary.Assets, :track_total_content_size, []}
|
|
# A module, function and arguments to be invoked periodically.
|
|
# This function must call :telemetry.execute/3 and a metric must be added above.
|
|
# {MusicLibraryWeb, :count_users, []}
|
|
]
|
|
end
|
|
|
|
defp add_tags(metadata) do
|
|
req = metadata.request
|
|
|
|
Map.merge(metadata, %{
|
|
host: req.host,
|
|
normalized_path: URI.parse(req.path).path
|
|
})
|
|
end
|
|
|
|
defp drop_archive_requests(metadata) do
|
|
metadata.request.host =~ "archive.org"
|
|
end
|
|
end
|