Ability to set OTEL_SERVICE_NAME

[jack-berg]

Component(s)

No response

Is your feature request related to a problem? Please describe.

When I manually add the javaagent to my services, its convenient to use OTEL_SERVICE_NAME (or some equivalent mechanism) to set service.name.

When I use the opentelemetry injector to install the java agent, there are bits of metadata which are natural candidates for service.name.

With the injector, its changing the processes to set OTEL_SERVICE_NAME is inconvenient to the point of undermining the whole point of the project. And so we need better tooling around this. Some combination of:

• Better autodetection mechanisms built into the instrumentations (e.g. like the javaagent's JarServiceNameResourceExtractor which attempts to set the service name from the jar name)
• Better configuration from the injector. Perhaps a syntax to be able to extract and set OTEL_SERVICE_NAME from the command / executable.

Without this, we're going to see a lot of service.name: "unknown_service:<language>".

Describe the solution you'd like

See above

Describe alternatives you've considered

Additional context

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