Issue to send log from Google Cloud Run

[m-lce]

Description

I instrument a FastAPI server running in Google Cloud Run.
Locally it works perferctly but with the same Docker image in Google Cloud Run some messages did not reach the Logfire backend and there is no errors in the logs.
Do you know what could be the issue

Python, Logfire & OS Versions, related packages (not required)

logfire="1.3.2"
platform="Linux-6.11.5-arch1-1-x86_64-with-glibc2.35"
python="3.12.7 (main, Oct 29 2024, 11:47:05) [GCC 11.4.0]"
[related_packages]
requests="2.32.3"
pydantic="2.9.2"
fastapi="0.115.4"
openai="1.52.2"
protobuf="4.25.5"
rich="13.9.3"
executing="2.1.0"
opentelemetry-api="1.27.0"
opentelemetry-exporter-otlp="1.27.0"
opentelemetry-exporter-otlp-proto-common="1.27.0"
opentelemetry-exporter-otlp-proto-grpc="1.27.0"
opentelemetry-exporter-otlp-proto-http="1.27.0"
opentelemetry-instrumentation="0.48b0"
opentelemetry-instrumentation-aiohttp-client="0.48b0"
opentelemetry-instrumentation-asgi="0.48b0"
opentelemetry-instrumentation-dbapi="0.48b0"
opentelemetry-instrumentation-fastapi="0.48b0"
opentelemetry-instrumentation-grpc="0.48b0"
opentelemetry-instrumentation-httpx="0.48b0"
opentelemetry-instrumentation-jinja2="0.48b0"
opentelemetry-instrumentation-pymongo="0.48b0"
opentelemetry-instrumentation-pymysql="0.48b0"
opentelemetry-instrumentation-requests="0.48b0"
opentelemetry-instrumentation-sqlite3="0.48b0"
opentelemetry-instrumentation-starlette="0.48b0"
opentelemetry-instrumentation-urllib="0.48b0"
opentelemetry-instrumentation-urllib3="0.48b0"
opentelemetry-proto="1.27.0"
opentelemetry-sdk="1.27.0"
opentelemetry-semantic-conventions="0.48b0"
opentelemetry-util-http="0.48b0"

[alexmojaki]

Google Cloud Run is sending a traceparent header that OpenTelemetry picks up automatically, and it's also sampling traces. Here's some code to prevent that by effectively disabling distributed tracing:

from opentelemetry.context import get_current
from opentelemetry.propagate import set_global_textmap
from opentelemetry.propagators.textmap import TextMapPropagator


class NullPropagator(TextMapPropagator):
    def extract(self, *args, **kwargs):
        return get_current()

    def inject(self, *args, **kwargs):
        pass

    @property
    def fields(self):
        return set()


set_global_textmap(NullPropagator())

[alexmojaki]

Things we need to maybe do:

1. Document this recipe.
2. Add a feature to the SDK to make it easier.
3. Automatically detect the traceparent header or something and warn the user or something, since this kind of unintentional distributed tracing seems quite common.
4. Pressure Cloud Run to do better here, e.g. allow setting the sample rate or disabling the traceparent header. Related: Not all traces are getting to GCP GoogleCloudPlatform/opentelemetry-cloud-run#18
5. Ask OTEL for ideas.

Currently if you do want distributed tracing based on a traceparent header sent from somewhere other than Cloud Run, we don't have a good solution. You can forcibly turn off sampling (generously assuming you don't want your own sampling) but missing a root span is not good anyway.

[m-lce]

It works perfectly now !
Thank you very much for the quick answer !