OpenTelemetry log export

[anish-sahoo]

I'd love to have exportable logs + general niceties related to logging. Making this issue so I can track my work. Do not contribute to this, I am working on this.

# cog.yaml
observability:
  logs: true

# predict.py
import logging


def predict() -> str:
    print("starting prediction")
    logging.info("preprocessing complete")
    return "result"

Both print() and logging show up in the collector carrying prediction context:

body: "starting prediction"
attributes: { source: stdout, operation: predict, cog.prediction.id: "..." }

body: "preprocessing complete"
attributes: { source: logging, operation: predict, cog.prediction.id: "..." }

Customization stays optional through telemetry.py:

# telemetry.py
from opentelemetry.sdk._logs import LoggerProvider
from opentelemetry.sdk.resources import Resource


def create_logger_provider(resource: Resource) -> LoggerProvider:
    ...

// coglet runtime events export to the same OpenTelemetry destination.
tracing::info!("prediction accepted");

[anish-sahoo]

I'm working on this. Just keeping it here to track.