Controlling operation drop down in Datadog APM

scirner22 commented 1 month ago

Related Problems?

Reference: https://github.com/open-telemetry/opentelemetry-rust-contrib/blob/main/opentelemetry-datadog/src/exporter/mod.rs#L312C14-L312C35

I'm unsure if this is a feature request or lack of documentation/examples that show this, but I'm trying to control the operation that's passed on Datadog APM. It appears that this value is always static and not configurable, but it is a field that's meant to be configurable from a Datadog APM perspective. As an example, if you auto instrument a Java webservice with the trace agent you'll end up with multiple operations, some examples are servlet.request, redis, grpc.client, etc. I'm interested in configuring something similar to that from this rust library.

What component are you working with?

opentelemetry-datadog

Describe the solution you'd like:

Controllable, or instructions on how to control, the operation field.

Considered Alternatives

No response

Additional Context

No response

Hartigan commented 1 month ago

Hi

It's tricky, because require deep dive into source code and docs of tracing, tracing_subscriber, tracing_opentelemetry and opentelemetry crates. For my case tracing -> tracing_subscriber -> tracing_opentelemetry -> opentelemetry -> opentelemetry_datadog I use traces like this:

tracing::info_span!("any name", operation = "kafka.consume", otel.name = "my.awesome.topic", span.kind = "consumer", ...);

and overrides for operation name in builder:

    .with_name_mapping(|span, _| {
        span
            .attributes
            .iter()
            .find(|k| k.key.as_str() == "operation")
            .and_then(|kv| match &kv.value {
                Value::String(v) => Some(v.as_str()),
                _ => None,
            })
            .unwrap_or("fallback_operation_name")
    })

and overrides for resource name:

    .with_resource_mapping(|span, _| &span.name)

In result I have traces in APM with operation - kafka.consume, kind - CONSUMER and resource name - my.awesome.topic.

You also may pass error status and message: https://docs.rs/tracing-opentelemetry/latest/tracing_opentelemetry/

scirner22 commented 1 month ago

Thank you! I'll try to make use of this and test the results.

open-telemetry / opentelemetry-rust-contrib