chore(elixir): remove dependency on opentelemetry prometheus exporter

implementations/elixir/examples/get_started/setup.exs

@@ -2,7 +2,7 @@ Mix.install([
   {:ockam, path: "../../ockam/ockam"},
   {:ockam_typed_cbor, override: true,
     path: "../../ockam/ockam_typed_cbor"},
-  {:ranch, "~> 2.1"}
+  {:ranch, "~> 2.2"}
 ])
 
 Application.load(:ockam)

implementations/elixir/examples/tcp_inlet_and_outlet/setup.exs

@@ -2,7 +2,7 @@ Mix.install([
   {:ockam, path: "../../ockam/ockam"},
   {:ockam_typed_cbor, override: true,
     path: "../../ockam/ockam_typed_cbor"},
-  {:ranch, "~> 2.1"}
+  {:ranch, "~> 2.2"}
 ])
 
 Application.load(:ockam)

implementations/elixir/ockam/ockam/mix.exs

@@ -54,7 +54,7 @@ defmodule Ockam.MixProject do
       {:ockam_typed_cbor, path: "../ockam_typed_cbor"},
       {:gen_state_machine, "~> 3.0"},
       {:telemetry, "~> 1.0", optional: true},
-      {:ranch, "~> 2.1", optional: true},
+      {:ranch, "~> 2.2", optional: true},
       {:ex_doc, "~> 0.25", only: :dev, runtime: false},
       {:credo, "~> 1.6", only: [:dev, :test], runtime: false},
       {:dialyxir, "~> 1.1", only: [:dev], runtime: false},

implementations/elixir/ockam/ockam_cloud_node/mix.exs

@@ -50,12 +50,6 @@ defmodule Ockam.CloudNode.MixProject do
       {:ex_doc, "~> 0.25", only: :dev, runtime: false},
       {:ockam_services, path: "../ockam_services"},
       {:ockam_kafka, path: "../ockam_kafka"},
-      {:telemetry, "~> 1.0", override: true},
-      {:telemetry_poller, "~> 1.0"},
-      {:telemetry_metrics, "~> 0.6.1"},
-      {:telemetry_metrics_prometheus, "~> 1.1.0"},
-      # Needed to avoid conflict on ranch version used by cowboy (telemetry_metrics_prometheus dep)
-      {:ranch, "~> 2.1.0", override: true},
       {:sched_ex, "~> 1.0"}
     ]
   end

implementations/elixir/ockam/ockam_metrics/lib/application.ex

@@ -13,7 +13,7 @@ defmodule Ockam.Metrics.Application do
   def start(_type, _args) do
     children =
       if Application.get_env(:ockam_metrics, :prometheus_port, nil) do
-        [Ockam.Metrics.Prometheus]
+        [Ockam.Metrics.Prometheus, Ockam.Metrics.Exporter.child_spec([])]
       else
         []
       end ++

implementations/elixir/ockam/ockam_metrics/lib/exporter.ex

@@ -0,0 +1,23 @@
+defmodule Ockam.Metrics.Exporter do
+  defmodule MyPlug do
+    import Plug.Conn
+
+    def init(options) do
+      # initialize options
+      options
+    end
+
+    def call(conn, _opts) do
+      body = TelemetryMetricsPrometheus.Core.scrape()
+
+      conn
+      |> put_resp_content_type("text/plain")
+      |> send_resp(200, body)
+    end
+  end
+
+  def child_spec(_options) do
+    port = String.to_integer(Application.fetch_env!(:ockam_metrics, :prometheus_port))
+    {Plug.Cowboy, plug: MyPlug, scheme: :http, options: [port: port]}
+  end
+end

implementations/elixir/ockam/ockam_metrics/lib/telemetry_prometheus.ex

@@ -26,12 +26,11 @@ defmodule Ockam.Metrics.Prometheus do
     %{
       id: TelemetryMetricsPrometheus,
       start: {
-        TelemetryMetricsPrometheus,
+        TelemetryMetricsPrometheus.Core,
         :start_link,
         [
           [
-            metrics: prepare_tags(metrics, shared_tags),
-            port: String.to_integer(Application.fetch_env!(:ockam_metrics, :prometheus_port))
+            metrics: prepare_tags(metrics, shared_tags)
           ]
         ]
       }

implementations/elixir/ockam/ockam_metrics/mix.exs

@@ -56,9 +56,8 @@ defmodule Ockam.Metrics.MixProject do
       {:telemetry, "~> 1.0", override: true},
       {:telemetry_poller, "~> 1.0"},
       {:telemetry_metrics, "~> 0.6.1"},
-      {:telemetry_metrics_prometheus, "~> 1.1.0"},
-      # Needed to avoid conflic on ranch version used by cowboy (telemetry_metrics_prometheus dep)
-      {:ranch, "~> 2.1.0", override: true}
+      {:telemetry_metrics_prometheus_core, "~> 1.2.1"},
+      {:plug_cowboy, "~> 2.7.3"}
     ]
   end
 

implementations/elixir/ockam/ockam_services/mix.exs

@@ -55,13 +55,13 @@ defmodule Ockam.Services.MixProject do
       {:ockam, path: "../ockam"},
       {:ockam_metrics, path: "../ockam_metrics"},
       {:ockam_abac, path: "../ockam_abac"},
-      {:ranch, "~> 2.1.0", override: true},
+      {:ranch, "~> 2.2"},
       ## Token lease manager
       {:httpoison, "~> 2.1"},
       {:poison, "~> 5.0.0"},
 
       ## Used for Ockam.Services.API.Endpoint' dispatch table implementation
-      {:cowboy, "~> 2.10.0"}
+      {:cowboy, "~> 2.13.0"}
     ]
   end