Logging and File Exporter

The logging exporter and file exporter are included as a part of the AWS Distro for OpenTelemetry(ADOT). An exporter is a component in the OpenTelemetry Collector configured to send data to different systems/back-ends. An exporter translates the OpenTelemetry protocol (OTLP) formatted data to a different predefined format to be interpreted by another system or back-end. Pipeline data includes logs, metrics, and traces. The logging exporter and file exporter are local exporters intended for debugging the Collector or OTLP formatted data without setting up a backend.

Logging Exporter

The logging exporter writes OTLP data to the console using the Zap Logger. The file exporter currently supports logs, metrics, and traces. In order to start using the file exporter, you have to modify the yaml file configuration of the OpenTelemetry Collector.

The following settings are optional:

• loglevel (default = info): there are 4 type of settings debug, info, warn, and error. In debug, pipeline data is verbosely logged. - Note: This option has been deprecated in favor of verbosity.
• verbosity (default = normal): the verbosity of the logging export (detailed|normal|basic). When set to detailed, pipeline data is verbosely logged.
• sampling_initial (default = 2): number of messages initially logged each second.
• sampling_thereafter (default = 500): sampling rate after the initial messages are logged (every ith message is logged).

Note: Refer to Zap docs for more details on how sampling parameters impact number of messages.

Example (Default):

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exporters:
  logging:

Example (Configuring with optional settings) :

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exporters:
  logging:
    verbosity: detailed
    sampling_initial: 5
    sampling_thereafter: 200

File Exporter

The file exporter writes pipeline data to a JSON file with Protobuf JSON encoding using OpenTelemetry protocol. The file exporter currently supports exporting logs, metrics, and traces. In order to start using the file exporter, you have to modify the yaml file configuration of the OpenTelemetry Collector.

Since there is no default path, you must declare the path location to a JSON file to write the pipeline data.

Example:

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exporters:
  file:
    path: ./filename.json

Note: There is no guarantee that the exact field names will remain stable.