AWS X-Ray Exporter for OpenTelemetry .NET

NOTE: This exporter is not affiliated with or officially supported by Amazon.

This is a port of AWS X-Ray Tracing Exporter for OpenTelemetry Collector.

The XRay Exporter exports telemetry to AWS X-Ray service without the need for X-Ray daemon or AWS Distro for Open Telemetry.

Installation

dotnet add package Marius.OpenTelemetry.Exporter.XRay

Traces

using var tracerProvider = Sdk.CreateTracerProviderBuilder()
    .SetSampler(new AlwaysOnSampler())
    .AddSource("DemoSource")
    .AddXRayExporter()
    .Build();
}

XRay exporter requires X-Ray compatible trace ids thus overwrites Activity.TraceIdGenerator with a compatible generator. If OpenTelemetry.Contrib.Extensions.AWSXRay is used to generate trace ids then set XRayExporterOptions.GenerateTraceIds = false.

XRayExporterOptions

XRayExporterOptions contains various options to configure the XRay Exporter.

AmazonXRayClientFactory (optional, default: null)

If client factory is not provided then default will be used:

1. If trace provider builder supports dependency injection then the exporter will try to resolve IAmazonXRay from service provider
2. Otherwise a new instance of AmazonXRayClient is created

GenerateTraceIds (optional, default: true)

If true then default trace ids generator will be used. The value false should be only used if OpenTelemetry.Contrib.Extensions.AWSXRay is configured to generate trace ids.

IndexAllAttribute (optional, default: true), IndexedAttributes (optional, default: empty)

If IndexAllAttributes is set to true the all non-XRay tags and attributes are passed as annotations for AWS X-Ray service to be indexed.

If IndexAllAttributes is set to false then only the attributes/tags listed in IndexAttributes will be passed as annotations, other values will be passed as metadata.

IndexedAttributes

A list of attributes to be passed as annotations to X-Ray. Resource attributes must have "otel.resource." prefix.

ShouldIndexAttribute (optional, default: null)

If provided then this function is used to determine which attributes/tags are to be passed via annotations for X-Ray service to be indexed.

ShouldIndexAttribute is only called for attributes that are not in IndexedAttributes list.

If function returns true then attribute/tag is passed as annotation.

If function returns false then attribute/tag is passed as metadata.

Example:

options.IndexAllAttributes = false; // Set to false otherwise ShouldIndexAttribute is ignored
options.ShouldIndexAttribute = ShouldIndexAttribute;

bool ShouldIndexAttribute(string name, bool isResource)
{
    if (isResource)
    {
        // In case of resource the final key is "otel.resource." + name
        // var key = "otel.resource." + name;
        if (name == "build"
            || name.Contains("internal"))
        {
            // index otel.resource.key (will ne normalized to otel_resource_key) and 
            // any other key that contains "internal"
            return true;
        }
        
        return false;
    }
    
    // Only index tenant_id and correlation_id
    return name == "tenant_id" || name == "correlation_id";
}

Both indexed attributes and function:

options.IndexAllAttributes = false; // Set to false otherwise ShouldIndexAttribute is ignored
options.ShouldIndexAttribute = ShouldIndexAttribute;
options.IndexedAttributes = new[] 
{
    "otel.resource.build",
    "tenant_id",
    "correlation_id",
};

bool ShouldIndexAttribute(string name, bool isResource)
{
    if (isResource)
    {
        // In case of resource the final key is "otel.resource." + name
        // var key = "otel.resource." + name;
        return name.Contains("internal");
    }
    
    // "tenant_id" and "correlation_id" are already indexed
    // don't index anything else
    return false;
}

IndexActivityNames (optional, default: true)

If true then activity_display_name and activity_operation_name corresponding to Activity.DisplayName and Activity.OperationName are passed as annotations.

ValidateTraceId (optional, default: false)

If true then will reject/ignore activities that have either invalid aws trace id or trace id has expired.

LogGroupNames (optional, default: null)

List of log group names for cloud watch if not provided by resource attributes ("aws.log.group.names" and "aws.log.group.arns").