Module: Datadog::Ext::DistributedTracing

Included in:

Contrib::Faraday::Middleware, DistributedTracing::Headers::B3, DistributedTracing::Headers::B3Single, DistributedTracing::Headers::Datadog, DistributedTracing::Headers::Headers, GRPCPropagator, GRPCPropagator::Carrier, HTTPPropagator, OpenTracer::DistributedHeaders, OpenTracer::RackPropagator, OpenTracer::RackPropagator, OpenTracer::TextMapPropagator, OpenTracer::TextMapPropagator

Defined in:

lib/ddtrace/ext/distributed.rb

Constant Summary

HTTP_HEADER_TRACE_ID =

HTTP headers one should set for distributed tracing. These are cross-language (eg: Python, Go and other implementations should honor these)

'x-datadog-trace-id'.freeze

HTTP_HEADER_PARENT_ID =

'x-datadog-parent-id'.freeze

HTTP_HEADER_SAMPLING_PRIORITY =

'x-datadog-sampling-priority'.freeze

SAMPLING_PRIORITY_KEY =

'_sampling_priority_v1'.freeze

HTTP_HEADER_ORIGIN =

'x-datadog-origin'.freeze

ORIGIN_KEY =

'_dd.origin'.freeze

B3_HEADER_TRACE_ID =

B3 headers used for distributed tracing

'x-b3-traceid'.freeze

B3_HEADER_SPAN_ID =

'x-b3-spanid'.freeze

B3_HEADER_SAMPLED =

'x-b3-sampled'.freeze

B3_HEADER_SINGLE =

'b3'.freeze

PROPAGATION_STYLE_DATADOG =

Distributed tracing propagation options

'Datadog'.freeze

PROPAGATION_STYLE_B3 =

'B3'.freeze

PROPAGATION_STYLE_B3_SINGLE_HEADER =

'B3 single header'.freeze

PROPAGATION_STYLE_INJECT_ENV =

'DD_PROPAGATION_STYLE_INJECT'.freeze

PROPAGATION_STYLE_EXTRACT_ENV =

'DD_PROPAGATION_STYLE_EXTRACT'.freeze

PROPAGATION_INJECT_STYLE_ENV_OLD =

NOTE: the below inject/extract values are deprecated and were defined erronously they were never part of the datadog language client standard or documentation some users may already be relying on them, but we should look to remove these in the future or before 1.0.

'DD_PROPAGATION_INJECT_STYLE'.freeze

PROPAGATION_EXTRACT_STYLE_ENV_OLD =

'DD_PROPAGATION_EXTRACT_STYLE'.freeze

GRPC_METADATA_TRACE_ID =

gRPC metadata keys for distributed tracing. https://github.com/grpc/grpc-go/blob/v1.10.x/Documentation/grpc-metadata.md

'x-datadog-trace-id'.freeze

GRPC_METADATA_PARENT_ID =

'x-datadog-parent-id'.freeze

GRPC_METADATA_SAMPLING_PRIORITY =

'x-datadog-sampling-priority'.freeze

GRPC_METADATA_ORIGIN =

'x-datadog-origin'.freeze