Add elasticapmreceiver

ideas/elasticapm-otel-receiver.md

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+---
+title: An OpenTelemetry receiver for Elastic APM
+last-edited: 2023-08-07
+date: 2023-08-06
+status: done
+---
+
+### [Repository][repo]
+
+[Elastic APM][elastic-apm] is an enterprise observability solution that supports
+tracing, metrics, and logs. Typically, users can configure [Elastic APM
+Agents][elastic-apm-agents] to instrument, collect, and send telemetry data to [Elastic APM Server][elastic-apm-server].
+
+[OpenTelemetry][opentelemetry] is a vendor-neutral collection of APIs, SDKs, and tools for creating, collecting, 
+and managing telemetry data. Elastic APM Server is capable of
+receiving data both from native Elastic APM Agents, and anything that
+sends data in [OpenTelemetry Protocol][otlp] (OTLP) format. 
+
+However, there is no way for existing applications instrumented with
+Elastic APM Agents to send data to _other_ backends. This makes
+experimenting and evaluating other observability solutions difficult.
+
+An OpenTelemetry receiver can be used to mimic the [intake API][intake] of 
+Elastic APM Server. This allows existing applications to send data
+to an OpenTelemetry Collector, which will transform the data into
+OpenTelemetry Span data, and send it to any backend.
+
+[elastic-apm-agents]:https://www.elastic.co/guide/en/apm/agent/index.html
+[elastic-apm-server]:https://github.com/elastic/apm-server
+[elastic-apm]: https://www.elastic.co/observability/application-performance-monitoring
+[intake]:https://www.elastic.co/guide/en/apm/guide/current/api-events.html
+[opentelemetry]:https://opentelemetry.io/docs/what-is-opentelemetry/
+[otlp]:https://opentelemetry.io/docs/specs/otel/protocol/
+[repo]:https://github.com/ldgrp/elasticapmreceiver