Where to learn about Jaeger YAML Config?

[Shin-Thant]

I'm starting my Jaeger journey, and I can't find documentation about Jaeger yaml config file. Any help is appreciated.

[dosubot[bot]]

Hi @Shin-Thant! I'm Dosu and I’m helping the jaeger team.

Jaeger doesn't use YAML files as the primary way to configure its core components. Instead, configuration is handled mainly through environment variables and command-line flags, which is common for Go-based CNCF projects. While Jaeger uses the Viper library (which can read YAML), there isn't an official YAML schema or example YAML config file provided for Jaeger services. You'll mostly see YAML used for Kubernetes manifests to deploy Jaeger, not for configuring the Jaeger application itself. If you want to configure Jaeger, check the official docs for environment variables and CLI flags, as that's the standard approach. More details on how configuration is handled can be seen in the codebase here.

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[Shin-Thant]

I thought since version two, it uses yaml file as main configuration?

[dosubot[bot]]

You're right—starting with Jaeger backend v2, YAML files are now the main way to configure Jaeger, especially for the all-in-one mode and other deployment scenarios. The v2 backend is built on top of the OpenTelemetry Collector, which expects YAML config files. You'll find example YAML configs like all-in-one.yaml, config.yaml, and configs for different storage backends (e.g., Badger, Cassandra, ClickHouse) in the codebase. These YAML files define service extensions, pipelines, telemetry, receivers, processors, and exporters, and support environment variable substitution for things like ports and endpoints. If you don't provide a --config flag, Jaeger v2 uses an embedded YAML config by default (see code, example YAML).

There isn't a central doc yet, but the example YAML files in the repo are a good starting point.

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[yurishkuro]

@Shin-Thant Start here https://www.jaegertracing.io/docs/2.11/deployment/configuration/