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Plugins

Status: Experimental.

You can use OTEL_DOTNET_AUTO_PLUGINS environment variable to extend the configuration and overwrite options of the OpenTelemetry .NET SDK Tracer, Meter or Logs. A plugin must be a non-static, non-abstract class which has a default constructor and that implements at least one of the configuration methods below showed in an example plugin class:

public class MyPlugin 
{
    // To configure plugin, before OTel SDK configuration is called.
    public void Initializing()
    {
        // My custom logic here
    }

    // To access TracerProvider right after TracerProviderBuilder.Build() is executed.
    public void TracerProviderInitialized(TracerProvider tracerProvider)
    {
        // My custom logic here
    }

    // To access MeterProvider right after MeterProviderBuilder.Build() is executed.
    public void MeterProviderInitialized(MeterProvider meterProvider)
    {
        // My custom logic here
    }

    // To configure tracing SDK before Auto Instrumentation configured SDK
    public OpenTelemetry.Trace.TracerProviderBuilder BeforeConfigureTracerProvider(OpenTelemetry.Trace.TracerProviderBuilder builder)
    {
        // My custom logic here

        return builder;
    }

    // To configure tracing SDK after Auto Instrumentation configured SDK
    public OpenTelemetry.Trace.TracerProviderBuilder AfterConfigureTracerProvider(OpenTelemetry.Trace.TracerProviderBuilder builder)
    {
        // My custom logic here

        return builder;
    }
        
    // To configure any traces options used by OpenTelemetry .NET Automatic Instrumentation
    public void ConfigureTracesOptions(OpenTelemetry.NameSpace.OptionType options)
    {
        // My custom logic here
        // Find supported options below
    }

    // To configure metrics SDK before Auto Instrumentation configured SDK
    public OpenTelemetry.Metrics.MeterProviderBuilder BeforeConfigureMeterProvider(OpenTelemetry.Metrics.MeterProviderBuilder builder)
    {
        // My custom logic here

        return builder;
    }

    // To configure metrics SDK after Auto Instrumentation configured SDK
    public OpenTelemetry.Metrics.MeterProviderBuilder AfterConfigureMeterProvider(OpenTelemetry.Metrics.MeterProviderBuilder builder)
    {
        // My custom logic here

        return builder;
    }
    
    // To configure any metrics options used by OpenTelemetry .NET Automatic Instrumentation
    public void ConfigureMetricsOptions(OpenTelemetry.NameSpace.OptionType options)
    {
        // My custom logic here
        // Find supported options below
    }

    // To configure logs SDK (the method name is the same as for other logs options)
    public void ConfigureLogsOptions(OpenTelemetry.Logs.OpenTelemetryLoggerOptions options)
    {
        // My custom logic here
    }

    // To configure any logs options used by OpenTelemetry .NET Automatic Instrumentation
    public void ConfigureLogsOptions(OpenTelemetry.NameSpace.OptionType options)
    {
        // My custom logic here
        // Find supported options below
    }

    // To configure Resource
    public OpenTelemetry.Resources.ResourceBuilder ConfigureResource(OpenTelemetry.Resources.ResourceBuilder builder)
    {
        // My custom logic here
        // Please note this method is common to set the resource for trace, logs and metrics.
        // This method could be overridden by ConfigureTracesOptions, ConfigureMeterProvider and ConfigureLogsOptions
        // by calling SetResourceBuilder with new object.

        return builder;
    }
}

Note

Automatic Instrumentation can configure particular properties before calling Configure{Signal}Methods. It is plugin responsibility to not override this behavior. Example: OpenTelemetry.Instrumentation.Http.HttpClientTraceInstrumentationOptions.EnrichWithHttpWebRequest is conditionally set by this project.

Supported Options

Tracing

Options type NuGet package NuGet version
OpenTelemetry.Exporter.ConsoleExporterOptions OpenTelemetry.Exporter.Console 1.9.0
OpenTelemetry.Exporter.ZipkinExporterOptions OpenTelemetry.Exporter.Zipkin 1.9.0
OpenTelemetry.Exporter.OtlpExporterOptions OpenTelemetry.Exporter.OpenTelemetryProtocol 1.9.0
OpenTelemetry.Instrumentation.AspNet.AspNetTraceInstrumentationOptions OpenTelemetry.Instrumentation.AspNet 1.9.0-beta.1
OpenTelemetry.Instrumentation.AspNetCore.AspNetCoreTraceInstrumentationOptions OpenTelemetry.Instrumentation.AspNetCore 1.9.0
OpenTelemetry.Instrumentation.EntityFrameworkCore.EntityFrameworkInstrumentationOptions OpenTelemetry.Instrumentation.EntityFrameworkCore 1.0.0-beta.11
OpenTelemetry.Instrumentation.GrpcNetClient.GrpcClientTraceInstrumentationOptions OpenTelemetry.Instrumentation.GrpcNetClient 1.9.0-beta.1
OpenTelemetry.Instrumentation.Http.HttpClientTraceInstrumentationOptions OpenTelemetry.Instrumentation.Http 1.9.0
OpenTelemetry.Instrumentation.Quartz.QuartzInstrumentationOptions OpenTelemetry.Instrumentation.Quartz 1.0.0-beta.3
OpenTelemetry.Instrumentation.SqlClient.SqlClientTraceInstrumentationOptions OpenTelemetry.Instrumentation.SqlClient 1.9.0-beta.1
OpenTelemetry.Instrumentation.StackExchangeRedis.StackExchangeRedisInstrumentationOptions OpenTelemetry.Instrumentation.StackExchangeRedis 1.9.0-beta.1
OpenTelemetry.Instrumentation.Wcf.WcfInstrumentationOptions OpenTelemetry.Instrumentation.Wcf 1.0.0-rc.17

Metrics

Options type NuGet package NuGet version
OpenTelemetry.Metrics.MetricReaderOptions OpenTelemetry 1.9.0
OpenTelemetry.Exporter.ConsoleExporterOptions OpenTelemetry.Exporter.Console 1.9.0
OpenTelemetry.Exporter.PrometheusExporterOptions OpenTelemetry.Exporter.Prometheus.HttpListener 1.9.0-beta.2
OpenTelemetry.Exporter.OtlpExporterOptions OpenTelemetry.Exporter.OpenTelemetryProtocol 1.9.0
OpenTelemetry.Instrumentation.AspNet.AspNetMetricsInstrumentationOptions OpenTelemetry.Instrumentation.AspNet 1.9.0-beta.1
OpenTelemetry.Instrumentation.Runtime.RuntimeInstrumentationOptions OpenTelemetry.Instrumentation.Runtime 1.9.0

Logs

Options type NuGet package NuGet version
OpenTelemetry.Logs.OpenTelemetryLoggerOptions OpenTelemetry 1.9.0
OpenTelemetry.Exporter.ConsoleExporterOptions OpenTelemetry.Exporter.Console 1.9.0
OpenTelemetry.Exporter.OtlpExporterOptions OpenTelemetry.Exporter.OpenTelemetryProtocol 1.9.0

Requirements

  • The plugin must use the same version of the OpenTelemetry as the OpenTelemetry .NET Automatic Instrumentation.
  • The plugin must use the same options versions as the OpenTelemetry .NET Automatic Instrumentation (found in the table above).