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from fastapi import FastAPI
from opentelemetry import trace
from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import OTLPSpanExporter
from opentelemetry.exporter.otlp.proto.http.trace_exporter import (
OTLPSpanExporter as HttpOTLPSpanExporter,
)
from opentelemetry.sdk.resources import SERVICE_NAME, Resource
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor
from sqlalchemy import Engine
from base64 import b64encode
from open_webui.utils.telemetry.instrumentors import Instrumentor
from open_webui.utils.telemetry.metrics import setup_metrics
from open_webui.env import (
OTEL_SERVICE_NAME,
OTEL_EXPORTER_OTLP_ENDPOINT,
OTEL_EXPORTER_OTLP_INSECURE,
ENABLE_OTEL_TRACES,
ENABLE_OTEL_METRICS,
OTEL_BASIC_AUTH_USERNAME,
OTEL_BASIC_AUTH_PASSWORD,
OTEL_OTLP_SPAN_EXPORTER,
)
def setup(app: FastAPI, db_engine: Engine):
# set up trace
resource = Resource.create(attributes={SERVICE_NAME: OTEL_SERVICE_NAME})
if ENABLE_OTEL_TRACES:
trace.set_tracer_provider(TracerProvider(resource=resource))
# Add basic auth header only if both username and password are not empty
headers = []
if OTEL_BASIC_AUTH_USERNAME and OTEL_BASIC_AUTH_PASSWORD:
auth_string = f"{OTEL_BASIC_AUTH_USERNAME}:{OTEL_BASIC_AUTH_PASSWORD}"
auth_header = b64encode(auth_string.encode()).decode()
headers = [("authorization", f"Basic {auth_header}")]
# otlp export
if OTEL_OTLP_SPAN_EXPORTER == "http":
exporter = HttpOTLPSpanExporter(
endpoint=OTEL_EXPORTER_OTLP_ENDPOINT,
headers=headers,
)
else:
exporter = OTLPSpanExporter(
endpoint=OTEL_EXPORTER_OTLP_ENDPOINT,
insecure=OTEL_EXPORTER_OTLP_INSECURE,
headers=headers,
)
trace.get_tracer_provider().add_span_processor(BatchSpanProcessor(exporter))
Instrumentor(app=app, db_engine=db_engine).instrument()
# set up metrics only if enabled
if ENABLE_OTEL_METRICS:
setup_metrics(app, resource)
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