The goal:

• Prototype the logging API that can be used by both the SDK consumer and SDK author.
  • If we could find an existing C++ logging API that is widely adopted + cross platform, we would want to leverage it instead of reinventing wheels.
• Implement the Processor and Exporter logic similar like SpanProcessor and trace exporter.
• Implement ElasticSearch Log Exporter which sends batches of logs from the SDK directly to ElasticSearch via HTTP REST API.

The stretch goal:

• Provide a console log exporter for local debugging purpose.
• Provide a way to associate trace id / span id and other context/baggage to log entries.
• Implement OTLP Exporter https://github.com/open-telemetry/opentelemetry-proto/tree/master/opentelemetry/proto/logs/v1.

Non-goal:

• Provide log sampler interface and implementation.
• Implement Fluentd/Fluentbit exporter.
• Implement local file exporter.

Initial list of work items:

• API to fetch Logger (e.g. LoggerProvider)
• Logging API
• Log Processor interface
• Log Exporter interface
• SimpleExportProcessor similar like this https://github.com/open-telemetry/opentelemetry-cpp/blob/2973baaf476a92e9d11d55e82f1dad78fefe6de1/sdk/include/opentelemetry/sdk/trace/simple_processor.h.
• BatchExportProcessor similar like this https://github.com/open-telemetry/opentelemetry-cpp/blob/master/sdk/src/trace/batch_span_processor.cc.
• Console Exporter
• ElasticSearch Exporter