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Instana exporter documentation. #4346

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Instana exporter documentation. #4346

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8 changes: 8 additions & 0 deletions specification/configuration/sdk-environment-variables.md
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Expand Up @@ -31,6 +31,7 @@ aliases:
- [OTLP Exporter](#otlp-exporter)
- [Zipkin Exporter](#zipkin-exporter)
- [Prometheus Exporter](#prometheus-exporter)
- [Instana Exporter](#instana-exporter)
- [Exporter Selection](#exporter-selection)
* [In-development Exporter Selection](#in-development-exporter-selection)
- [Metrics SDK Configuration](#metrics-sdk-configuration)
Expand Down Expand Up @@ -233,6 +234,13 @@ _is no specified default, or configuration via environment variables_.
| OTEL_EXPORTER_PROMETHEUS_HOST | Host used by the Prometheus exporter | "localhost" |
| OTEL_EXPORTER_PROMETHEUS_PORT | Port used by the Prometheus exporter | 9464 |

## Instana Exporter
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Don't think this belongs in the spec. this can be documented in the respective language docs itself.
Spec defined variable are generally applicable more widely, and usually don't have vendor specific things.

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+1. Not even in the language docs - the SDKs are not required to implement exporters to specific vendor backends (which for some reason are not willing to accept OTLP?). If there is an exporter somewhere in contrib that's where such documentation would belong.


| Name | Description | Default |
| ------------------------------ | ----------------------------------------------------------------------------- | ----------------- |
| OTEL_EXPORTER_INSTANA_ENDPOINT | Endpoint of Instana agent | `127.0.0.1:42699` |
| OTEL_EXPORTER_INSTANA_TIMEOUT | Maximum time (in milliseconds) the Instana exporter will wait for each export | 10000 |

## Exporter Selection

We define environment variables for setting one or more exporters per signal.
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