From a279b4f5116963bcf9497a08b2c47fbcc239d759 Mon Sep 17 00:00:00 2001
From: sh1ney <vilensky.net@mail.ru>
Date: Tue, 19 Nov 2024 15:57:10 +0500
Subject: [PATCH 1/2] 1.5

---
 Program.cs       | 27 ++++++++++++++++++++++++++-
 compose.yaml     | 12 ++++++++++++
 prometheus.yml   |  6 ++++++
 telemetry.csproj | 10 ++++++++++
 4 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 compose.yaml
 create mode 100644 prometheus.yml

diff --git a/Program.cs b/Program.cs
index bc275e4..5683fa9 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1,5 +1,28 @@
+using OpenTelemetry.Logs;
+using OpenTelemetry.Metrics;
+using OpenTelemetry.Resources;
+using OpenTelemetry.Trace;
+
 var builder = WebApplication.CreateBuilder(args);
 
+builder.Logging.AddOpenTelemetry(options =>
+{
+    options
+        .SetResourceBuilder(
+            ResourceBuilder.CreateDefault()
+                .AddService("TelemetryExample"))
+        .AddConsoleExporter();
+});
+builder.Services.AddOpenTelemetry()
+    .ConfigureResource(resource => resource.AddService("TelemetryExample"))
+    .WithTracing(tracing => tracing
+        .AddAspNetCoreInstrumentation()
+        .AddConsoleExporter())
+    .WithMetrics(metrics => metrics
+        .AddPrometheusExporter()
+        .AddAspNetCoreInstrumentation()
+        .AddConsoleExporter());
+
 // Add services to the container.
 builder.Services.AddRazorPages();
 
@@ -22,4 +45,6 @@
 
 app.MapRazorPages();
 
-app.Run();
+app.UseOpenTelemetryPrometheusScrapingEndpoint();
+
+app.Run();
\ No newline at end of file
diff --git a/compose.yaml b/compose.yaml
new file mode 100644
index 0000000..b8a11cb
--- /dev/null
+++ b/compose.yaml
@@ -0,0 +1,12 @@
+services:
+  prometheus:
+    image: "prom/prometheus"
+    ports:
+      - "9090:9090"
+    volumes:
+      - "./prometheus.yml:/etc/prometheus/prometheus.yml"
+
+  grafana:
+    image: "grafana/grafana-oss"
+    ports:
+      - "3000:3000"
\ No newline at end of file
diff --git a/prometheus.yml b/prometheus.yml
new file mode 100644
index 0000000..2d20d56
--- /dev/null
+++ b/prometheus.yml
@@ -0,0 +1,6 @@
+ scrape_configs:
+     - job_name: "prometheus"
+      # Override the global default and scrape targets from this job every 5 seconds.
+       scrape_interval: 5s
+       static_configs:
+          - targets: ["host.docker.internal:5149"]
\ No newline at end of file
diff --git a/telemetry.csproj b/telemetry.csproj
index 1b28a01..63e07f3 100644
--- a/telemetry.csproj
+++ b/telemetry.csproj
@@ -6,4 +6,14 @@
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="OpenTelemetry" Version="1.10.0" />
+    <PackageReference Include="OpenTelemetry.Exporter.Console" Version="1.10.0" />
+    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.10.0" />
+    <PackageReference Include="OpenTelemetry.Exporter.Prometheus.AspNetCore" Version="1.10.0-beta.1" />
+    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.10.0" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.9.0" />
+    <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.9.0" />
+  </ItemGroup>
+
 </Project>

From 927ac1e6a92efe7e4f57a79278e2d7720b2b83ec Mon Sep 17 00:00:00 2001
From: ollxko <i.ollxko.ru>
Date: Tue, 19 Nov 2024 16:32:22 +0500
Subject: [PATCH 2/2] 'done'

---
 Metrics.cs            | 22 ++++++++++++++++++++++
 Pages/Index.cshtml.cs | 15 +++++++++++++--
 Program.cs            |  7 +++++--
 3 files changed, 40 insertions(+), 4 deletions(-)
 create mode 100644 Metrics.cs

diff --git a/Metrics.cs b/Metrics.cs
new file mode 100644
index 0000000..30e2524
--- /dev/null
+++ b/Metrics.cs
@@ -0,0 +1,22 @@
+using System.Diagnostics.Metrics;
+
+namespace telemetry;
+
+public class Metrics
+{
+    private readonly Counter<int> indexRequestsCount;
+    private readonly Histogram<double> indexRequestsTime;
+
+    public Metrics(IMeterFactory meterFactory)
+    {
+        var meter = meterFactory.Create(nameof(Metrics));
+        indexRequestsCount = meter.CreateCounter<int>("requests.index.count", "pcs", "Количество запросов");
+        indexRequestsTime = meter.CreateHistogram<double>("requests.index.time", "ms", "Время запроса к index");
+    }
+
+    public void RequestToIndex(TimeSpan elapsed)
+    {
+        indexRequestsCount.Add(1);
+        indexRequestsTime.Record(elapsed.TotalMilliseconds);
+    }
+}
\ No newline at end of file
diff --git a/Pages/Index.cshtml.cs b/Pages/Index.cshtml.cs
index 34a599f..f249600 100644
--- a/Pages/Index.cshtml.cs
+++ b/Pages/Index.cshtml.cs
@@ -1,19 +1,30 @@
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.RazorPages;
+using OpenTelemetry.Metrics;
+using System.Diagnostics;
+using System.Diagnostics.Metrics;
 
 namespace telemetry.Pages;
 
 public class IndexModel : PageModel
 {
     private readonly ILogger<IndexModel> _logger;
+    private readonly Metrics _metrics;
 
-    public IndexModel(ILogger<IndexModel> logger)
+    public IndexModel(ILogger<IndexModel> logger, IMeterFactory meterFactory)
     {
+        _metrics = new Metrics(meterFactory);
         _logger = logger;
     }
 
     public void OnGet()
     {
-
+        var sw = Stopwatch.StartNew();
+        for (var i = 0; i < new Random().Next(0, 100); i++)
+        {
+            Console.Write("1");
+        }
+        sw.Stop();
+        _metrics.RequestToIndex(sw.Elapsed);
     }
 }
diff --git a/Program.cs b/Program.cs
index 5683fa9..a36d1f5 100644
--- a/Program.cs
+++ b/Program.cs
@@ -2,6 +2,7 @@
 using OpenTelemetry.Metrics;
 using OpenTelemetry.Resources;
 using OpenTelemetry.Trace;
+using telemetry;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -12,6 +13,7 @@
             ResourceBuilder.CreateDefault()
                 .AddService("TelemetryExample"))
         .AddConsoleExporter();
+        
 });
 builder.Services.AddOpenTelemetry()
     .ConfigureResource(resource => resource.AddService("TelemetryExample"))
@@ -21,7 +23,8 @@
     .WithMetrics(metrics => metrics
         .AddPrometheusExporter()
         .AddAspNetCoreInstrumentation()
-        .AddConsoleExporter());
+        .AddConsoleExporter()
+        .AddMeter(nameof(Metrics)));
 
 // Add services to the container.
 builder.Services.AddRazorPages();
@@ -47,4 +50,4 @@
 
 app.UseOpenTelemetryPrometheusScrapingEndpoint();
 
-app.Run();
\ No newline at end of file
+app.Run();