⭐ prometheus process collector 추가

- os 정보를 수집한다
  - cpu
  - memory
  - file descriptor usage
  - native threads count
  - process start and up times

lib/ppg/application.ex

@@ -5,8 +5,11 @@ defmodule Ppg.Application do
 
   use Application
 
+  require Prometheus.Registry
+
   def start(_type, _args) do
     Ppg.Metrics.Setup.setup()
+    Prometheus.Registry.register_collector(:prometheus_process_collector)
 
     # List all child processes to be supervised
     children = [

mix.exs

@@ -40,7 +40,8 @@ defmodule Ppg.MixProject do
       {:jason, "~> 1.0"},
       {:plug_cowboy, "~> 2.0"},
       {:prometheus_ex, "~> 3.0"},
-      {:prometheus_plugs, "~> 1.1"}
+      {:prometheus_plugs, "~> 1.1"},
+      {:prometheus_process_collector, "~> 1.4"}
     ]
   end
 end

mix.lock

@@ -16,6 +16,7 @@
   "prometheus": {:hex, :prometheus, "4.5.0", "8f4a2246fe0beb50af0f77c5e0a5bb78fe575c34a9655d7f8bc743aad1c6bf76", [:mix, :rebar3], [], "hexpm"},
   "prometheus_ex": {:hex, :prometheus_ex, "3.0.5", "fa58cfd983487fc5ead331e9a3e0aa622c67232b3ec71710ced122c4c453a02f", [:mix], [{:prometheus, "~> 4.0", [hex: :prometheus, repo: "hexpm", optional: false]}], "hexpm"},
   "prometheus_plugs": {:hex, :prometheus_plugs, "1.1.5", "25933d48f8af3a5941dd7b621c889749894d8a1082a6ff7c67cc99dec26377c5", [:mix], [{:accept, "~> 0.1", [hex: :accept, repo: "hexpm", optional: false]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: false]}, {:prometheus_ex, "~> 1.1 or ~> 2.0 or ~> 3.0", [hex: :prometheus_ex, repo: "hexpm", optional: false]}, {:prometheus_process_collector, "~> 1.1", [hex: :prometheus_process_collector, repo: "hexpm", optional: true]}], "hexpm"},
+  "prometheus_process_collector": {:hex, :prometheus_process_collector, "1.4.5", "9baea93f5d8c2758dbad0de021ef74438d2f81a01d1f24f5ef0bb949a7b4191d", [:rebar3], [{:prometheus, "~> 4.0", [hex: :prometheus, repo: "hexpm", optional: false]}], "hexpm"},
   "ranch": {:hex, :ranch, "1.7.1", "6b1fab51b49196860b733a49c07604465a47bdb78aa10c1c16a3d199f7f8c881", [:rebar3], [], "hexpm"},
   "telemetry": {:hex, :telemetry, "0.4.1", "ae2718484892448a24470e6aa341bc847c3277bfb8d4e9289f7474d752c09c7f", [:rebar3], [], "hexpm"},
 }