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Document OTEL_RESOURCE_ATTRIBUTES (#783)

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Trask Stalnaker 2020-07-25 03:55:22 -07:00 committed by GitHub
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@ -88,6 +88,9 @@ A simple wrapper for the OTLP exporter of opentelemetry-java.
| otel.otlp.metadata | OTEL_OTLP_METADATA | The key-value pairs separated by semicolon to pass as request metadata. |
| otel.otlp.span.timeout | OTEL_OTLP_SPAN_TIMEOUT | The max waiting time allowed to send each span batch, default is 1000. |
In order to configure the service name for the OTLP exporter, you must add `service.name` key
to the OpenTelemetry Resource ([see below](#opentelemetry-resource)), e.g. `OTEL_RESOURCE_ATTRIBUTE=service.name=myservice`.
#### Logging exporter
The logging exporter simply prints the name of the span along with its
@ -98,6 +101,15 @@ attributes to stdout. It is used mainly for testing and debugging.
| ota.exporter=logging | OTA_EXPORTER=logging | To select logging exporter |
| ota.exporter.logging.prefix | OTA_EXPORTER_LOGGING_PREFIX | An optional string that is printed in front of the span name and attributes. |
#### OpenTelemetry Resource
The [OpenTelemetry Resource](https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/resource/sdk.md)
is a representation of the entity producing telemetry.
| System property | Environment variable | Purpose |
|-----------------|--------------------------|------------------------------------------------------------------------------|
| (not yet) | OTEL_RESOURCE_ATTRIBUTES | Used to specify resource attributes in format: key1=val1,key2=val2,key3=val3 |
#### Batch span processor
| System property | Environment variable | Purpose |