pub fn init(
log_format: &LogFormat,
default_directive: &str,
) -> Result<Option<SdkTracerProvider>>Expand description
Initialize application telemetry (Logging, Tracing, Metrics).
Configures:
tracing-subscriber::fmtfor structured logging (JSON, compact, or pretty).EnvFilterfor dynamic log levels (RUST_LOG).- An optional OTLP trace-export layer (see [
build_otlp_provider]).
The log format is controlled by UAR_SERVER__LOG_FORMAT or the server.log_format
config key. Defaults to JSON for Kubernetes log aggregator compatibility.
default_directive is the filter used when RUST_LOG is unset; an
explicit RUST_LOG always wins.
Returns the OTLP [SdkTracerProvider] when trace export is active, so the
caller can shutdown() it on exit to flush buffered spans; None otherwise.