# Datadog To enable the Datadog tracer: ```yaml tab="File (YAML)" tracing: datadog: {} ``` ```toml tab="File (TOML)" [tracing] [tracing.datadog] ``` ```bash tab="CLI" --tracing.datadog=true ``` #### `localAgentHostPort` _Required, Default="127.0.0.1:8126"_ Local Agent Host Port instructs the reporter to send spans to the Datadog Agent at this address (host:port). ```yaml tab="File (YAML)" tracing: datadog: localAgentHostPort: 127.0.0.1:8126 ``` ```toml tab="File (TOML)" [tracing] [tracing.datadog] localAgentHostPort = "127.0.0.1:8126" ``` ```bash tab="CLI" --tracing.datadog.localAgentHostPort=127.0.0.1:8126 ``` #### `debug` _Optional, Default=false_ Enables Datadog debug. ```yaml tab="File (YAML)" tracing: datadog: debug: true ``` ```toml tab="File (TOML)" [tracing] [tracing.datadog] debug = true ``` ```bash tab="CLI" --tracing.datadog.debug=true ``` #### `globalTag` _Optional, Default=empty_ Applies a shared key:value tag on all spans. ```yaml tab="File (YAML)" tracing: datadog: globalTag: sample ``` ```toml tab="File (TOML)" [tracing] [tracing.datadog] globalTag = "sample" ``` ```bash tab="CLI" --tracing.datadog.globalTag=sample ``` #### `prioritySampling` _Optional, Default=false_ Enables priority sampling. When using distributed tracing, this option must be enabled in order to get all the parts of a distributed trace sampled. ```yaml tab="File (YAML)" tracing: datadog: prioritySampling: true ``` ```toml tab="File (TOML)" [tracing] [tracing.datadog] prioritySampling = true ``` ```bash tab="CLI" --tracing.datadog.prioritySampling=true ```