prometheus-net

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// This sample demonstrates how to integrate prometheus-net into a web app while instructing it
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// to export metrics on a dedicated port (e.g. so it can be firewalled off from the internet).
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// 
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// NuGet packages required:
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// * prometheus-net.AspNetCore
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using Prometheus;
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var builder = WebApplication.CreateBuilder(args);
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builder.Services.AddRazorPages();
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// Start the metrics exporter as a background service.
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// Open http://localhost:5167 to see the web app.
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// Open http://localhost:1234/metrics to see the metrics.
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//
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// Metrics published:
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// * built-in process metrics giving basic information about the .NET runtime (enabled by default)
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// * metrics from .NET Event Counters (enabled by default, updated every 10 seconds)
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// * metrics from .NET Meters (enabled by default)
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// * metrics about requests handled by the web app (configured below)
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builder.Services.AddMetricServer(options =>
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{
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    options.Port = 1234;
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});
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var app = builder.Build();
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if (!app.Environment.IsDevelopment())
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{
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    app.UseExceptionHandler("/Error");
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}
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app.UseStaticFiles();
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app.UseRouting();
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// Capture metrics about all received HTTP requests.
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app.UseHttpMetrics();
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app.UseAuthorization();
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app.MapRazorPages();
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app.Run();
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