How to enable traces manually without opentelemetry-instrument?

[aschuhl]

So i have been having some trouble sending traces without the opentelemetry-instrument command.

I followed the manual instrumentation: https://opentelemetry.io/docs/instrumentation/python/manual/

and the flask instrumentation: https://opentelemetry-python-contrib.readthedocs.io/en/latest/instrumentation/flask/flask.html

but am still having problems.

So following the flask guide, I created an app with their code:

from opentelemetry.instrumentation.flask import FlaskInstrumentor

app = Flask(__name__)

FlaskInstrumentor().instrument_app(app)

@app.route("/")
def hello():
    return "Hello!"

if __name__ == "__main__":
    app.run(debug=True)

If a run:

OTEL_SERVICE_NAME=your-service-name \                       ✔  39s  repro-ex   02:29:10 PM
OTEL_TRACES_EXPORTER=console \
OTEL_METRICS_EXPORTER=console \
opentelemetry-instrument \
    flask run

It works and outputs traces:

{
    "name": "/",
    "context": {
        "trace_id": "0xb05d306870f81df32a5277ed88a9f749",
        "span_id": "0x4da247de4b11e9f7",
        "trace_state": "[]"
    },
    "kind": "SpanKind.SERVER",
    "parent_id": null,
    "start_time": "2023-02-20T19:43:29.129147Z",
    "end_time": "2023-02-20T19:43:29.155805Z",
    "status": {
        "status_code": "UNSET"
    },
    "attributes": {
        "http.method": "GET",
        "http.server_name": "127.0.0.1",
        "http.scheme": "http",
        "net.host.port": 5000,
        "http.host": "127.0.0.1:5000",
        "http.target": "/",
        "net.peer.ip": "127.0.0.1",
        "http.user_agent": "curl/7.85.0",
        "net.peer.port": 62859,
        "http.flavor": "1.1",
        "http.route": "/",
        "http.status_code": 200
    },
    "events": [],
    "links": [],
    "resource": {
        "attributes": {
            "telemetry.sdk.language": "python",
            "telemetry.sdk.name": "opentelemetry",
            "telemetry.sdk.version": "1.12.0",
            "service.name": "your-service-name",
            "telemetry.auto.version": "0.33b0"
        },
        "schema_url": ""
}

But the point of me instrumenting was so I wouldn't use the opentelemetry-instrument command.

But, running:

OTEL_SERVICE_NAME=your-service-name \                       ✔  39s  repro-ex   02:29:10 PM
OTEL_TRACES_EXPORTER=console \
OTEL_METRICS_EXPORTER=console \
    flask run

Does not work. I noticed when getting the spans, it outputs:

NonRecordingSpan(SpanContext(trace_id=0x00000000000000000000000000000000, span_id=0x0000000000000000, trace_flags=0x00, trace_state=[], is_remote=False))

So I looked at the manual instrumentation and added:

provider = TracerProvider()
processor = BatchSpanProcessor(ConsoleSpanExporter())
provider.add_span_processor(processor)

# Sets the global default tracer provider
trace.set_tracer_provider(provider)
trace.get_tracer(__name__)

This now outputs a span that is recording:

_Span(name="/", context=SpanContext(trace_id=0x0e3c79c52301734a735b43983be63c09, span_id=0x5a42a397ec265684, trace_flags=0x01, trace_state=[], is_remote=False))

but it still doesn't output the full trace to console. What I am missing to achieve this?

PS. Ultimately I want to send the traces to a collector, and I experience the same issue. Works when passing the opentelemetry-instrument command, but no traces are sent without it.

[aschuhl]

@srikanthccv you were very helpful last week, do you have any ideas?

[tharwan]

We are having the same problem with FastAPI. From what I can tell the OTEL_TRACES_EXPORTER env vars are currently ignored, because the _OTelSDKConfigurator is never used.

[srikanthccv]

@aschuhl, do not the app in debug mode and try again.

[birla]

for anyone who is stuck here: check this link https://opentelemetry-python.readthedocs.io/en/latest/exporter/otlp/otlp.html