Emit load generator logs via OTLP (#1446)

* add otel logging to loadgen

* attach to root logger

* actually output logs

* update changelog

* fix sanity

---------

Co-authored-by: Juliano Costa <julianocosta89@outlook.com>

Author: austinlparker

CHANGELOG.md

@@ -7,6 +7,8 @@ the release.
 
 ## Unreleased
 
+* [loadgenerator] emit logs via OTLP
+  ([#1446](https://github.com/open-telemetry/opentelemetry-demo/pull/1446))
 * [frontend] reset quantity when new product selected
   ([#1447](https://github.com/open-telemetry/opentelemetry-demo/pull/1447))
 * [featureflag] deprecate in favor of flagd

src/loadgenerator/Dockerfile

@@ -20,4 +20,4 @@ COPY ./src/loadgenerator/people.json .
 ENV LOCUST_PLAYWRIGHT=1
 ENV PLAYWRIGHT_BROWSERS_PATH=/opt/pw-browsers
 RUN playwright install --with-deps chromium
-ENTRYPOINT locust
+ENTRYPOINT locust --skip-log-setup

src/loadgenerator/locustfile.py

@@ -8,6 +8,9 @@
 import os
 import random
 import uuid
+import logging
+import sys
+from pythonjsonlogger import jsonlogger
 from locust import HttpUser, task, between
 from locust_plugins.users.playwright import PlaywrightUser, pw, PageWithRetry, event
 
@@ -23,8 +26,30 @@
 from opentelemetry.instrumentation.requests import RequestsInstrumentor
 from opentelemetry.instrumentation.system_metrics import SystemMetricsInstrumentor
 from opentelemetry.instrumentation.urllib3 import URLLib3Instrumentor
+from opentelemetry._logs import set_logger_provider
+from opentelemetry.exporter.otlp.proto.grpc._log_exporter import (
+    OTLPLogExporter,
+)
+from opentelemetry.sdk._logs import LoggerProvider, LoggingHandler
+from opentelemetry.sdk._logs.export import BatchLogRecordProcessor
+from opentelemetry.sdk.resources import Resource
 from playwright.async_api import Route, Request
 
+logger_provider = LoggerProvider(resource=Resource.create(
+        {
+            "service.name": "loadgenerator",
+        }
+    ),)
+set_logger_provider(logger_provider)
+
+exporter = OTLPLogExporter(insecure=True)
+logger_provider.add_log_record_processor(BatchLogRecordProcessor(exporter))
+handler = LoggingHandler(level=logging.INFO, logger_provider=logger_provider)
+
+# Attach OTLP handler to locust logger
+logging.getLogger().addHandler(handler)
+logging.getLogger().setLevel(logging.INFO)
+
 exporter = OTLPMetricExporter(insecure=True)
 set_meter_provider(MeterProvider([PeriodicExportingMetricReader(exporter)]))
 
@@ -37,6 +62,7 @@
 RequestsInstrumentor().instrument()
 SystemMetricsInstrumentor().instrument()
 URLLib3Instrumentor().instrument()
+logging.info("Instrumentation complete")
 
 categories = [
     "binoculars",
@@ -64,7 +90,6 @@
 people_file = open('people.json')
 people = json.load(people_file)
 
-
 class WebsiteUser(HttpUser):
     wait_time = between(1, 10)
 

src/loadgenerator/requirements.txt

@@ -19,17 +19,17 @@ locust==2.18.2
 locust_plugins==3.4.0
 markupsafe==2.1.3
 msgpack==1.0.7
-opentelemetry-api==1.22.0
-opentelemetry-exporter-otlp-proto-grpc==1.22.0
-opentelemetry-instrumentation==0.43b0
-opentelemetry-instrumentation-jinja2==0.43b0
-opentelemetry-instrumentation-requests==0.43b0
-opentelemetry-instrumentation-system-metrics==0.43b0
-opentelemetry-instrumentation-urllib3==0.43b0
-opentelemetry-proto==1.22.0
-opentelemetry-sdk==1.22.0
-opentelemetry-semantic-conventions==0.43b0
-opentelemetry-util-http==0.43b0
+opentelemetry-api==1.23.0
+opentelemetry-exporter-otlp-proto-grpc==1.23.0
+opentelemetry-instrumentation==0.44b0
+opentelemetry-instrumentation-jinja2==0.44b0
+opentelemetry-instrumentation-requests==0.44b0
+opentelemetry-instrumentation-system-metrics==0.44b0
+opentelemetry-instrumentation-urllib3==0.44b0
+opentelemetry-proto==1.23.0
+opentelemetry-sdk==1.23.0
+opentelemetry-semantic-conventions==0.44b0
+opentelemetry-util-http==0.44b0
 protobuf==4.25.0
 psutil==5.9.6
 pyzmq==25.1.1
@@ -42,3 +42,4 @@ werkzeug==3.0.1
 wrapt==1.16.0
 zope-event==5.0
 zope-interface==6.1
+python-json-logger==2.0.7