akkoma/lib/pleroma/application.ex
rinpatch 58a4f350a8 Refactor gun pooling and simplify adapter option insertion
This patch refactors gun pooling to use Elixir process registry and
simplifies adapter option insertion.

Having the pool use process registry instead of a GenServer has a number of advantages:
- Simpler code: the initial implementation adds about half the lines of code it deletes
- Concurrency: unlike a GenServer, ETS-based registry can handle multiple checkout/checkin
requests at the same time
- Precise and easy idle connection clousure: current proposal for closing idle connections in
the GenServer-based pool needs to filter through all connections once a minute and compare their
last active time with closing time. With Elixir process registry this can be done
by just using `Process.send_after`/`Process.cancel_timer` in the worker process.
- Lower memory footprint: In my tests `gun-memory-leak` branch uses about 290mb on peak load (250 connections)
and 235mb on idle (5-10 connections). Registry-based pool uses 210mb on idle and 240mb on peak load
2020-07-15 15:17:27 +03:00

250 lines
7 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Application do
use Application
import Cachex.Spec
alias Pleroma.Config
require Logger
@name Mix.Project.config()[:name]
@version Mix.Project.config()[:version]
@repository Mix.Project.config()[:source_url]
@env Mix.env()
def name, do: @name
def version, do: @version
def named_version, do: @name <> " " <> @version
def repository, do: @repository
def user_agent do
case Config.get([:http, :user_agent], :default) do
:default ->
info = "#{Pleroma.Web.base_url()} <#{Config.get([:instance, :email], "")}>"
named_version() <> "; " <> info
custom ->
custom
end
end
# See http://elixir-lang.org/docs/stable/elixir/Application.html
# for more information on OTP Applications
def start(_type, _args) do
# Scrubbers are compiled at runtime and therefore will cause a conflict
# every time the application is restarted, so we disable module
# conflicts at runtime
Code.compiler_options(ignore_module_conflict: true)
Config.Holder.save_default()
Pleroma.HTML.compile_scrubbers()
Config.DeprecationWarnings.warn()
Pleroma.Plugs.HTTPSecurityPlug.warn_if_disabled()
Pleroma.ApplicationRequirements.verify!()
setup_instrumenters()
load_custom_modules()
Pleroma.Docs.JSON.compile()
adapter = Application.get_env(:tesla, :adapter)
if adapter == Tesla.Adapter.Gun do
if version = Pleroma.OTPVersion.version() do
[major, minor] =
version
|> String.split(".")
|> Enum.map(&String.to_integer/1)
|> Enum.take(2)
if (major == 22 and minor < 2) or major < 22 do
raise "
!!!OTP VERSION WARNING!!!
You are using gun adapter with OTP version #{version}, which doesn't support correct handling of unordered certificates chains. Please update your Erlang/OTP to at least 22.2.
"
end
else
raise "
!!!OTP VERSION WARNING!!!
To support correct handling of unordered certificates chains - OTP version must be > 22.2.
"
end
end
# Define workers and child supervisors to be supervised
children =
[
Pleroma.Repo,
Config.TransferTask,
Pleroma.Emoji,
Pleroma.Plugs.RateLimiter.Supervisor
] ++
cachex_children() ++
http_children(adapter, @env) ++
[
Pleroma.Stats,
Pleroma.JobQueueMonitor,
{Oban, Config.get(Oban)}
] ++
task_children(@env) ++
streamer_child(@env) ++
chat_child(@env, chat_enabled?()) ++
[
Pleroma.Web.Endpoint,
Pleroma.Gopher.Server
]
# See http://elixir-lang.org/docs/stable/elixir/Supervisor.html
# for other strategies and supported options
opts = [strategy: :one_for_one, name: Pleroma.Supervisor]
Supervisor.start_link(children, opts)
end
def load_custom_modules do
dir = Config.get([:modules, :runtime_dir])
if dir && File.exists?(dir) do
dir
|> Pleroma.Utils.compile_dir()
|> case do
{:error, _errors, _warnings} ->
raise "Invalid custom modules"
{:ok, modules, _warnings} ->
if @env != :test do
Enum.each(modules, fn mod ->
Logger.info("Custom module loaded: #{inspect(mod)}")
end)
end
:ok
end
end
end
defp setup_instrumenters do
require Prometheus.Registry
if Application.get_env(:prometheus, Pleroma.Repo.Instrumenter) do
:ok =
:telemetry.attach(
"prometheus-ecto",
[:pleroma, :repo, :query],
&Pleroma.Repo.Instrumenter.handle_event/4,
%{}
)
Pleroma.Repo.Instrumenter.setup()
end
Pleroma.Web.Endpoint.MetricsExporter.setup()
Pleroma.Web.Endpoint.PipelineInstrumenter.setup()
Pleroma.Web.Endpoint.Instrumenter.setup()
end
defp cachex_children do
[
build_cachex("used_captcha", ttl_interval: seconds_valid_interval()),
build_cachex("user", default_ttl: 25_000, ttl_interval: 1000, limit: 2500),
build_cachex("object", default_ttl: 25_000, ttl_interval: 1000, limit: 2500),
build_cachex("rich_media", default_ttl: :timer.minutes(120), limit: 5000),
build_cachex("scrubber", limit: 2500),
build_cachex("idempotency", expiration: idempotency_expiration(), limit: 2500),
build_cachex("web_resp", limit: 2500),
build_cachex("emoji_packs", expiration: emoji_packs_expiration(), limit: 10),
build_cachex("failed_proxy_url", limit: 2500),
build_cachex("banned_urls", default_ttl: :timer.hours(24 * 30), limit: 5_000)
]
end
defp emoji_packs_expiration,
do: expiration(default: :timer.seconds(5 * 60), interval: :timer.seconds(60))
defp idempotency_expiration,
do: expiration(default: :timer.seconds(6 * 60 * 60), interval: :timer.seconds(60))
defp seconds_valid_interval,
do: :timer.seconds(Config.get!([Pleroma.Captcha, :seconds_valid]))
@spec build_cachex(String.t(), keyword()) :: map()
def build_cachex(type, opts),
do: %{
id: String.to_atom("cachex_" <> type),
start: {Cachex, :start_link, [String.to_atom(type <> "_cache"), opts]},
type: :worker
}
defp chat_enabled?, do: Config.get([:chat, :enabled])
defp streamer_child(env) when env in [:test, :benchmark], do: []
defp streamer_child(_) do
[
{Registry,
[
name: Pleroma.Web.Streamer.registry(),
keys: :duplicate,
partitions: System.schedulers_online()
]}
]
end
defp chat_child(_env, true) do
[Pleroma.Web.ChatChannel.ChatChannelState]
end
defp chat_child(_, _), do: []
defp task_children(:test) do
[
%{
id: :web_push_init,
start: {Task, :start_link, [&Pleroma.Web.Push.init/0]},
restart: :temporary
}
]
end
defp task_children(_) do
[
%{
id: :web_push_init,
start: {Task, :start_link, [&Pleroma.Web.Push.init/0]},
restart: :temporary
},
%{
id: :internal_fetch_init,
start: {Task, :start_link, [&Pleroma.Web.ActivityPub.InternalFetchActor.init/0]},
restart: :temporary
}
]
end
# start hackney and gun pools in tests
defp http_children(_, :test) do
http_children(Tesla.Adapter.Hackney, nil) ++ http_children(Tesla.Adapter.Gun, nil)
end
defp http_children(Tesla.Adapter.Hackney, _) do
pools = [:federation, :media]
pools =
if Config.get([Pleroma.Upload, :proxy_remote]) do
[:upload | pools]
else
pools
end
for pool <- pools do
options = Config.get([:hackney_pools, pool])
:hackney_pool.child_spec(pool, options)
end
end
defp http_children(Tesla.Adapter.Gun, _) do
[{Registry, keys: :unique, name: Pleroma.Gun.ConnectionPool}]
end
defp http_children(_, _), do: []
end