src/tracing.py

import base64
import os

from dotenv import load_dotenv
from openinference.instrumentation.smolagents import SmolagentsInstrumentor
from opentelemetry.exporter.otlp.proto.http.trace_exporter import (
    OTLPSpanExporter,
)
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import SimpleSpanProcessor

load_dotenv()

LANGFUSE_PUBLIC_KEY = os.getenv("LANGFUSE_PUBLIC_KEY")
LANGFUSE_SECRET_KEY = os.getenv("LANGFUSE_SECRET_KEY")

LANGFUSE_AUTH = base64.b64encode(
    f"{LANGFUSE_PUBLIC_KEY}:{LANGFUSE_SECRET_KEY}".encode()
).decode()

os.environ["OTEL_EXPORTER_OTLP_ENDPOINT"] = (
    "https://cloud.langfuse.com/api/public/otel"  # EU data region
)
os.environ["OTEL_EXPORTER_OTLP_HEADERS"] = (
    f"Authorization=Basic {LANGFUSE_AUTH}"
)


def add_tracing():
    trace_provider = TracerProvider()
    trace_provider.add_span_processor(SimpleSpanProcessor(OTLPSpanExporter()))

    SmolagentsInstrumentor().instrument(tracer_provider=trace_provider)