twandylue / OTLP_playground

OpenTelemetry Playground

OTLP_playground

My OpenTelemetry Playground. For learning and testing purposes. Tracing between multiple services.

In this case, server1 would send a request to server2. Both servers are instrumented with OpenTelemetry.

How to run

$ python -m pip install -r requirements.txt
...(snip)

On server 1

cd ./server1
$ python3 app.py
{'baggage': 'hello=world', 'traceparent': '00-ff6f8fe8c53cc958720b1c6ddc762cfa-1ba973510338c61f-01'}
127.0.0.1 - - [25/May/2024 05:36:45] "GET / HTTP/1.1" 200 -
{
    "name": "hello",
    "context": {
        "trace_id": "0xff6f8fe8c53cc958720b1c6ddc762cfa",
        "span_id": "0x1ba973510338c61f",
        "trace_state": "[]"
    },
    "kind": "SpanKind.INTERNAL",
    "parent_id": null,
    "start_time": "2024-05-25T11:36:45.049766Z",
    "end_time": "2024-05-25T11:36:45.062631Z",
    "status": {
        "status_code": "UNSET"
    },
    "attributes": {},
    "events": [],
    "links": [],
    "resource": {
        "attributes": { "telemetry.sdk.language": "python",
            "telemetry.sdk.name": "opentelemetry",
            "telemetry.sdk.version": "1.24.0",
            "service.name": "unknown_service"
        },
        "schema_url": ""
    }
}

On server 2

This would output the log with WARNING level of the server 2 into app.log file.

cd ./server2
export ENV=DEV
$ python3 app.py
(...snip)

The log file would be created in the same directory.

On client side

$ curl http://localhost:8080/rolldice
Hell from API 1! Response from API 2: Hello from API 2!

How to run the unit tests

export ENV=TEST
$ pytest wsgi.py
(...snip)

References

• OpenTelemetry
• Propagation