Update OTLP trace example. (#386)

* Update OTLP trace example.

* Do not list telemetry endpoint.

* Remove manually adding quota project header.

Author: DylanRussell

samples/otlptrace/example_grpc.py

@@ -32,20 +32,22 @@
 This is a sample script that exports OTLP traces encoded as protobufs via gRPC. 
 """
 
-credentials, project_id = google.auth.default()
+credentials, _ = google.auth.default()
 request = google.auth.transport.requests.Request()
 resource = Resource.create(attributes={SERVICE_NAME: "otlp-gcp-grpc-sample"})
 
-auth_metadata_plugin = AuthMetadataPlugin(
-    credentials=credentials, request=request
-)
+auth_metadata_plugin = AuthMetadataPlugin(credentials=credentials, request=request)
 channel_creds = grpc.composite_channel_credentials(
     grpc.ssl_channel_credentials(),
     grpc.metadata_call_credentials(auth_metadata_plugin),
 )
 
 trace_provider = TracerProvider(resource=resource)
-processor = BatchSpanProcessor(OTLPSpanExporter(credentials=channel_creds))
+processor = BatchSpanProcessor(
+    OTLPSpanExporter(
+        credentials=channel_creds,
+    )
+)
 trace_provider.add_span_processor(processor)
 trace.set_tracer_provider(trace_provider)
 tracer = trace.get_tracer("my.tracer.name")

samples/otlptrace/example_http.py

@@ -19,21 +19,20 @@
 from opentelemetry.exporter.otlp.proto.http.trace_exporter import (
     OTLPSpanExporter,
 )
+from google.auth.transport.requests import AuthorizedSession
 from opentelemetry.sdk.resources import SERVICE_NAME, Resource
 from opentelemetry.sdk.trace import TracerProvider
 from opentelemetry.sdk.trace.export import BatchSpanProcessor
 
-credentials, project_id = google.auth.default()
-request = google.auth.transport.requests.Request()
-credentials.refresh(request)
-req_headers = {
-    "x-goog-user-project": credentials.quota_project_id,
-    "Authorization": "Bearer " + credentials.token,
-}
-resource = Resource.create(attributes={SERVICE_NAME: "otlp-gcp-http-sample"})
-
-trace_provider = TracerProvider(resource=resource)
-processor = BatchSpanProcessor(OTLPSpanExporter(headers=req_headers))
+credentials, _ = google.auth.default()
+trace_provider = TracerProvider(
+    resource=Resource.create(attributes={SERVICE_NAME: "otlp-gcp-http-sample"})
+)
+processor = BatchSpanProcessor(
+    OTLPSpanExporter(
+        session=AuthorizedSession(credentials),
+    )
+)
 trace_provider.add_span_processor(processor)
 trace.set_tracer_provider(trace_provider)
 tracer = trace.get_tracer("my.tracer.name")