Document OTEL_RESOURCE_ATTRIBUTES
@@ -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 |
