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使用Docker、Prometheus和Grafana追踪Spotify指标

news 2026/3/26 18:20:24

在WinampToSpotify项目中添加了.NET Aspire服务默认值和.NET Aspire AppHost后，添加了以下代码以在本地使用Docker Desktop运行Prometheus和Grafana。运行以下代码需要启动Docker Desktop。

// Prometheus容器，用于抓取应用指标
var prometheus = builder.AddContainer("prometheus", "prom/prometheus")
.WithBindMount("./prometheus/prometheus.yml", "/etc/prometheus/prometheus.yml")
.WithEndpoint(port: 9090, targetPort: 9090)
.WithArgs("--config.file=/etc/prometheus/prometheus.yml",
"--web.enable-otlp-receiver");

// 使用Prometheus作为数据源的Grafana容器
var grafana = builder.AddContainer("grafana", "grafana/grafana")
.WithVolume("grafana-storage", "/var/lib/grafana") // 持久化仪表板、用户、数据库
.WithVolume("grafana-provisioning", "/etc/grafana/provisioning", isReadOnly: true) // 可选：预配置YAML/JSON
.WithEndpoint(port: 3000, targetPort: 3000);

prometheus.yml是默认的Prometheus配置：

global:scrape_interval: 15sevaluation_interval: 15s
scrape_configs:- job_name: "otel-collector"static_configs:- targets: ["localhost:9090"]  # 如果使用Docker，请调整，例如 host.docker.internal:9464metrics_path: /metrics

创建了OpenTelemetryLib项目，并创建了一个ServiceCollection扩展方法来配置OTEL导出端点。安装了以下NuGet包：OpenTelemetry、OpenTelemetry.Exporter.Console、OpenTelemetry.Exporter.OpenTelemetryProtocol、OpenTelemetry.Exporter.Prometheus.HttpListener、OpenTelemetry.Instrumentation.Process。

var meterProviderBuilder = Sdk.CreateMeterProviderBuilder().SetResourceBuilder(ResourceBuilder.CreateDefault().AddService("winamptospotifyweb", serviceVersion: "1.0.0")).AddMeter(WinamptoSpotifyMetricsManager.MeterName).AddOtlpExporter((options, metricReader) =>{options.Protocol = OtlpExportProtocol.Grpc; // 4317作为gRPC端口。options.ExportProcessorType = ExportProcessorType.Batch;options.Endpoint = endpoint;metricReader.PeriodicExportingMetricReaderOptions.ExportIntervalMilliseconds = 60000; // 1分钟metricReader.PeriodicExportingMetricReaderOptions.ExportTimeoutMilliseconds = 30000; // 半分钟}) //Aspire Dashboard导出.AddOtlpExporter((exporterOptions, metricReaderOptions) =>{exporterOptions.Endpoint = new Uri("http://localhost:9090/api/v1/otlp/v1/metrics");exporterOptions.Protocol = OtlpExportProtocol.HttpProtobuf;metricReaderOptions.PeriodicExportingMetricReaderOptions.ExportIntervalMilliseconds = 1000;}); //Prometheus导出

创建了Spotify指标类来注册Spotify服务相关的指标。开始跟踪每个文件夹添加的总曲目数。

public class SpotifyServiceMetrics : IWinampToSpotifyWebMetrics
{private readonly ISpotifyService _spotifyService;public SpotifyServiceMetrics(ISpotifyService spotifyService){_spotifyService = spotifyService; }public void RegisterMetrics(Meter meter){var tracksAddedMetric = meter.CreateObservableGauge("winamptospotifyweb.spotifyservice.totaltracksadded", () => _spotifyService.GetPlaylistSummary().TotalTracksAdded,"unitless", "Number of tracks added");        }
}

WinamptoSpotifyMetricsManager类有助于注册指标，该类使用IMeterFactory进行注册。

public WinamptoSpotifyMetricsManager(IEnumerable<IWinampToSpotifyWebMetrics> metrics, IMeterFactory meterFactory)
{_metrics = metrics.ToImmutableList();_meter = meterFactory.Create(new MeterOptions(MeterName));
}/// <summary>
///     注册WinampToSpotify实例中包含的所有自定义指标。
/// </summary>
public void Start()
{foreach (var metric in _metrics){metric.RegisterMetrics(_meter);}
}

winamptospotifyweb.spotifyservice.totaltracksadded 指标已导出到 Aspire Dashboard、Prometheus 和 Grafana。

代码更改可以在 dotnet aspire added 和 opentelemetry and metrics added 提交中找到。
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