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Add OTEL_EXPORTER_JAEGER_PROTOCOL and improve description of other OTEL_EXPORTER_JAEGER_* env vars #2341

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Feb 17, 2022
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Add OTEL_EXPORTER_JAEGER_PROTOCOL and improve description of other OTEL_EXPORTER_JAEGER_* env vars #2341

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1e64a2b
Standardize OTEL_EXPORTER_JAEGER_PROTOCOL
pellared Feb 14, 2022
0be7bf2
Update sdk-environment-variables.md
pellared Feb 14, 2022
f0bcb48
Update CHANGELOG.md
pellared Feb 14, 2022
4254238
Update CHANGELOG.md
pellared Feb 14, 2022
63716b4
Update CHANGELOG.md
pellared Feb 14, 2022
1b746ac
Add udp/thrift.binary and reformat table
pellared Feb 15, 2022
b523b36
Merge branch 'main' into patch-2
pellared Feb 15, 2022
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Merge branch 'main' into patch-2
pellared Feb 16, 2022
e2c4178
Update sdk-environment-variables.md
pellared Feb 16, 2022
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Merge branch 'main' into patch-2
carlosalberto Feb 17, 2022
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12 changes: 8 additions & 4 deletions CHANGELOG.md
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Expand Up @@ -12,14 +12,18 @@ release.
### Traces

- Clarify `StartSpan` returning the parent as a non-recording Span when no SDK
is in use
is in use.
([#2121](https:/open-telemetry/opentelemetry-specification/pull/2121))
- Add support for probability sampling in the OpenTelemetry `tracestate` entry and
add optional specification for consistent probability sampling.
([#2047](https:/open-telemetry/opentelemetry-specification/pull/2047))
- Change description and default value of OTEL_EXPORTER_JAEGER_ENDPOINT env var
to point to the correct HTTP port and correct description of OTEL_TRACES_EXPORTER
([#2333](https:/open-telemetry/opentelemetry-specification/pull/2333)).
- Change description and default value of `OTEL_EXPORTER_JAEGER_ENDPOINT` environment
variable to point to the correct HTTP port and correct description of
`OTEL_TRACES_EXPORTER`.
([#2333](https:/open-telemetry/opentelemetry-specification/pull/2333))
- Add `OTEL_EXPORTER_JAEGER_PROTOCOL` environment variable to select the protocol
used by the Jaeger exporter.
([#2341](https:/open-telemetry/opentelemetry-specification/pull/2341))

### Metrics

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20 changes: 11 additions & 9 deletions specification/sdk-environment-variables.md
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Expand Up @@ -127,15 +127,21 @@ See [OpenTelemetry Protocol Exporter Configuration Options](./protocol/exporter.
| Name | Description | Default |
|---------------------------------|------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|
| OTEL_EXPORTER_JAEGER_AGENT_HOST | Hostname for the Jaeger agent [1] | "localhost" |
| OTEL_EXPORTER_JAEGER_AGENT_PORT | Port for the Jaeger agent `compact` Thrift protocol | 6831 |
| OTEL_EXPORTER_JAEGER_ENDPOINT | Full URL of [Thrift over HTTP][jaeger_http] endpoint for Jaeger traces [2] | <!-- markdown-link-check-disable --> `"http://localhost:14268/api/traces"` <!-- markdown-link-check-enable --> |
| OTEL_EXPORTER_JAEGER_AGENT_PORT | Port for the Jaeger agent [1] | 6831 |
| OTEL_EXPORTER_JAEGER_ENDPOINT | Full URL of endpoint for Jaeger traces [2] | `http://localhost:14268/api/traces` for `http/thrift.binary` protocol, `http://localhost:14250` for `grpc` protocol |
| OTEL_EXPORTER_JAEGER_TIMEOUT | Maximum time the Jaeger exporter will wait for each batch export | 10s |
| OTEL_EXPORTER_JAEGER_USER | Username to be used for HTTP basic authentication | |
| OTEL_EXPORTER_JAEGER_PASSWORD | Password to be used for HTTP basic authentication | |
| OTEL_EXPORTER_JAEGER_PROTOCOL | The transport protocol. Options MAY include `http/thrift.binary`, `grpc`, `udp/thrift.compact` | `http/thrift.binary` [3] |
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[1] See [Jaeger Agent](https://www.jaegertracing.io/docs/latest/deployment/#agent) documentation.
[1] Used when `udp/thrift.compact` protocol is selected.
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See [Jaeger Agent](https://www.jaegertracing.io/docs/latest/deployment/#agent) documentation.

[2] When the exporter uses the gRPC protocol, the environment variable refers to the gRPC endpoint and the default value should be `http://localhost:14250`.
[2] Used when `http/thrift.binary` or `grpc` protocol is selected.

[3] The default transport SHOULD be [Thrift over HTTP][jaeger_http] unless
SDKs have good reasons to choose other as the default
(e.g. for backward compatibility reasons).

## Zipkin Exporter

Expand Down Expand Up @@ -181,11 +187,7 @@ The SDK MAY accept a comma-separated list to enable setting multiple exporters.
Known values for `OTEL_TRACES_EXPORTER` are:

- `"otlp"`: [OTLP](./protocol/otlp.md)
- `"jaeger"`: export in Jaeger data model. If no additional configuration is
provided the default protocol SHOULD be [Thrift over HTTP][jaeger_http] unless
SDKs have good reasons to choose [gRPC][jaeger_grpc] as the default
(e.g. for backward compatibility reasons when gRPC was already the default
in a stable SDK release).
- `"jaeger"`: export in Jaeger data model
- `"zipkin"`: [Zipkin](https://zipkin.io/zipkin-api/) (Defaults to [protobuf](https:/openzipkin/zipkin-api/blob/master/zipkin.proto) format)
- `"none"`: No automatically configured exporter for traces.

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