sam/Foxnouns.NET
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feat: add actual metrics using prometheus-net

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sam 2024-09-03 17:00:14 +02:00
parent 4a6b5f3b85
commit 54ec469cd9
Signed by: sam
GPG key ID: B4EF20DDE721CAA1
9 changed files with 134 additions and 56 deletions
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34
Foxnouns.Backend/Extensions/WebApplicationExtensions.cs
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@ -1,6 +1,3 @@
using App.Metrics;
using App.Metrics.AspNetCore;
using App.Metrics.Formatters.Prometheus;
using Coravel;
using Coravel.Queuing.Interfaces;
using Foxnouns.Backend.Database;
@ -9,6 +6,7 @@ using Foxnouns.Backend.Middleware;
using Foxnouns.Backend.Services;
using Microsoft.EntityFrameworkCore;
using NodaTime;
using Prometheus;
using Serilog;
using Serilog.Events;
using IClock = NodaTime.IClock;
@ -59,32 +57,12 @@ public static class WebApplicationExtensions
return config;
}
public static WebApplicationBuilder AddMetrics(this WebApplicationBuilder builder)
public static WebApplicationBuilder AddMetrics(this WebApplicationBuilder builder, Config config)
{
var config = builder.Configuration.Get<Config>() ?? new();
var metrics = AppMetrics.CreateDefaultBuilder()
.OutputMetrics.AsPrometheusPlainText()
.Build();
builder.Services.AddSingleton(metrics);
builder.Services.AddSingleton<IMetrics>(metrics);
builder.WebHost
.ConfigureMetrics(metrics)
.UseMetrics(opts =>
{
opts.EndpointOptions = options =>
{
// Metrics must listen on a separate port for security reasons. If no metrics port is set, disable the endpoint entirely.
options.MetricsEndpointEnabled = config.Logging.MetricsPort != null;
options.EnvironmentInfoEndpointEnabled = config.Logging.MetricsPort != null;
options.MetricsTextEndpointEnabled = false;
options.MetricsEndpointOutputFormatter = metrics.OutputMetricsFormatters
.OfType<MetricsPrometheusTextOutputFormatter>().First();
};
})
.UseMetricsWebTracking()
.ConfigureAppMetricsHostingConfiguration(opts => { opts.AllEndpointsPort = config.Logging.MetricsPort; });
builder.Services.AddMetricServer(o => o.Port = config.Logging.MetricsPort)
.AddSingleton<MetricsCollectionService>();
if (!config.Logging.EnableMetrics)
builder.Services.AddHostedService<BackgroundMetricsCollectionService>();
return builder;
}