[Bug] the open telemetry example doesn't export metrics

[kinfaikan]

What are you really trying to do?

I want to export metrics to datadog.

Describe the bug

I don't see any metrics in any terminals.

Minimal Reproduction

follow the steps in the readme https://github.com/temporalio/samples-python/tree/main/open_telemetry

Environment/Versions

• OS and processor: M2 Mac
• Temporal Version: 1.22.0 and/or SDK version: 1.6.0
• Are you using Docker or Kubernetes or building Temporal from source? docker

Additional context

[cretz]

It looks like the Jaeger all-in-one container no longer dumps OTel metrics as it once did. We will find another solution to show the metrics here (probably something like https://opentelemetry.io/docs/demo/docker-deployment/). Thanks for the report!