Merge pull request DataDog#36 from DataDog/yang.song/fix-load-generator-staging

[OTEL-1363] Fix loadgenerator

Author: songy23

src/loadgenerator/locustfile.py

@@ -10,18 +10,29 @@
 from locust import HttpUser, task, between
 
 from opentelemetry import context, baggage, trace
+from opentelemetry.metrics import set_meter_provider
+from opentelemetry.sdk.metrics import MeterProvider
+from opentelemetry.sdk.metrics.export import MetricExporter, PeriodicExportingMetricReader
 from opentelemetry.sdk.trace import TracerProvider
 from opentelemetry.sdk.trace.export import BatchSpanProcessor
-from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
+from opentelemetry.exporter.otlp.proto.grpc.metric_exporter import OTLPMetricExporter
+from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import OTLPSpanExporter
+from opentelemetry.instrumentation.jinja2 import Jinja2Instrumentor
 from opentelemetry.instrumentation.requests import RequestsInstrumentor
+from opentelemetry.instrumentation.system_metrics import SystemMetricsInstrumentor
 from opentelemetry.instrumentation.urllib3 import URLLib3Instrumentor
 
+exporter = OTLPMetricExporter(insecure=True)
+set_meter_provider(MeterProvider([PeriodicExportingMetricReader(exporter)]))
+
 tracer_provider = TracerProvider()
 trace.set_tracer_provider(tracer_provider)
 tracer_provider.add_span_processor(BatchSpanProcessor(OTLPSpanExporter()))
 
 # Instrumenting manually to avoid error with locust gevent monkey
+Jinja2Instrumentor().instrument()
 RequestsInstrumentor().instrument()
+SystemMetricsInstrumentor().instrument()
 URLLib3Instrumentor().instrument()
 
 categories = [