Enable the spanmetrics connector component.

[kovrus]

Component(s)

connector/spanmetrics

Describe the issue you're reporting

The spanmetrics connector is a port of the spanmetrics processor, but since it is going to be a new component, we thought that it can be a good time to fix some issues of the former spanmetrics processor in the new connector and bring the connector closer to the OTel spec, drop any related Prometheus specific conventions that the processor heavily uses, etc.

We can deprecate the processor and keep both components for some time to give users time to migrate. It should not be that critical anyways because the spanmetrics processor's stability level is in development.

TODO when enabling the component:

• Enable the component
• Add a change log entry listing all the breaking changes and instructions on how to migrate from the spanmetrics processor to the spanmetrics connector
  • [connectors/spanmetrics] Rename the operation attribute to span.name  #18529
  • [connectors/spanmetrics] Drop Prometheus-specific metrics labels sanitization.  #18678
  • [connectors/spanmetrics] Drop _total from generated metrics names. #18677
  • spanmetricsprocessor: Set resource attributes where possible #18502
  • spanmetricsconnector: Change metric name from latency to duration #19214
  • [connectors/spanmetrics] Change units for explicit/exponential buckets histogram from milliseconds to seconds #18698
  • [connectors/spanmetrics] Use OTel Exponential Histogram to observe measurements for the latency metric. #18528
• Update READMEs of the processor and connector
• Deprecate the spanmetrics processor

[github-actions]

Pinging code owners for connector/spanmetrics: @albertteoh. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

Pinging code owners:

• connector/spanmetrics: @albertteoh

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[kovrus]

cc: @Cluas @albertteoh @djaglowski

[github-actions]

Pinging code owners for processor/spanmetrics: @albertteoh. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[djaglowski]

Thanks for writing this up @kovrus. Sounds like a good plan, for both before and after enabling the connector.