populate required resource attributes

Author: dashpole

samples/otlpmetric/README.md

@@ -21,8 +21,9 @@ gcloud auth application-default login
 #### Run the Sample
 ```sh
 # export necessary OTEL environment variables
-export OTEL_RESOURCE_ATTRIBUTES="gcp.project_id=<project-id>"
+export PROJECT_ID=<project-id>
 export OTEL_EXPORTER_OTLP_ENDPOINT=<endpoint>
+export OTEL_RESOURCE_ATTRIBUTES="gcp.project_id=$PROJECT_ID,service.name=otlp-sample,service.instance.id=1"
 
 # from the samples/otlpmetric repository
 python3 example.py

samples/otlpmetric/example.py

@@ -24,7 +24,10 @@
 from opentelemetry.exporter.otlp.proto.grpc.metric_exporter import (
     OTLPMetricExporter,
 )
-from opentelemetry.sdk.resources import SERVICE_NAME, Resource
+from opentelemetry.resourcedetector.gcp_resource_detector._detector import (
+    GoogleCloudResourceDetector,
+)
+from opentelemetry.sdk.resources import SERVICE_NAME, Resource, get_aggregated_resources
 from opentelemetry.sdk.metrics import MeterProvider
 from opentelemetry.sdk.metrics.export import PeriodicExportingMetricReader
 
@@ -34,7 +37,9 @@
 
 credentials, project_id = google.auth.default()
 request = google.auth.transport.requests.Request()
-resource = Resource.create(attributes={SERVICE_NAME: "otlp-gcp-grpc-sample"})
+resource = get_aggregated_resources(
+    [GoogleCloudResourceDetector(raise_on_error=True)]
+)
 
 auth_metadata_plugin = AuthMetadataPlugin(
     credentials=credentials, request=request

samples/otlpmetric/requirements.txt

@@ -4,3 +4,4 @@ opentelemetry-sdk==1.24.0
 google-auth==2.18.1
 opentelemetry-exporter-otlp-proto-grpc==1.24.0
 grpcio==1.63.0
+opentelemetry-resourcedetector-gcp==1.8.0