[v9] Add tracing service and configuration #15243
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* Add tracing service and configuration
Provides a new tracing configuration block, which can be
used to configure if and how spans are exported to a
telemetry backend. In the example below, the tracing
service is enabled and will export spans to
`collector.example.com:4317` via gRPC with mTLS enabled.
```yaml
tracing_service:
enabled: yes
exporter_url: collector.example.com:4317
sampling_rate_per_million: 1000000
ca_certs:
- /certs/rootCA.pem
keypairs:
- key_file: /certs/example.com-client-key.pem
cert_file: /certs/example.com-client.pem
```
This configuration ends up being consumed by the `TeleportProcess`
and passed to `tracing.NewTraceProvider` which sets up the OpenTelemetry
Exporter, TracerProvider, Propagator and Sampler. In order for spans to
be exported, the `tracing_service` must be enabled **and** have a
`sampling_rate_per_million` value > 0.
espadolini
approved these changes
Aug 5, 2022
gabrielcorado
approved these changes
Aug 5, 2022
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Backport #12699 to branch/v9