minor improvement to panic message

src/utils/metrics.rs

@@ -1,4 +1,5 @@
 use crate::utils::from_env::{FromEnv, FromEnvErr, FromEnvVar};
+use core::net::SocketAddr;
 use metrics_exporter_prometheus::PrometheusBuilder;
 
 use super::from_env::EnvItemInfo;
@@ -72,8 +73,14 @@ impl FromEnv for MetricsConfig {
 pub fn init_metrics() {
     let cfg = MetricsConfig::from_env().unwrap();
 
+    let address = SocketAddr::from(([0, 0, 0, 0], cfg.port));
+
     PrometheusBuilder::new()
-        .with_http_listener(([0, 0, 0, 0], cfg.port))
+        .with_http_listener(address)
         .install()
-        .expect("failed to install prometheus exporter");
+        .unwrap_or_else(|error| {
+            panic!(
+                "failed to install prometheus exporter on {address} (configure with {METRICS_PORT} env var): {error}",
+            )
+        });
 }

src/utils/otlp.rs

@@ -65,8 +65,6 @@ impl Drop for OtelGuard {
 ///   will return [`None`].
 /// - OTEL_LEVEL - optional. Specifies the minimum [`tracing::Level`] to
 ///   export in the [`EnvFilter`] format. Defaults to [`tracing::Level::DEBUG`].
-/// - OTEL_TIMEOUT - optional. Specifies the timeout for the exporter in
-///   **milliseconds**. Defaults to 1000ms, which is equivalent to 1 second.
 /// - OTEL_ENVIRONMENT_NAME - optional. Value for the `deployment.environment.
 ///   name` resource key according to the OTEL conventions.
 #[derive(Debug, Clone)]
@@ -79,7 +77,7 @@ pub struct OtelConfig {
     /// Defaults to DEBUG.
     pub level: EnvFilter,
 
-    /// OTEL convenition `deployment.environment.name`
+    /// OTEL convention `deployment.environment.name`
     pub environment: String,
 }
 
@@ -139,8 +137,6 @@ impl OtelConfig {
     ///   OTLP exporting will be disabled.
     /// - `OTEL_LEVEL` - optional. Specifies the minimum [`tracing::Level`] to
     ///   export. Defaults to [`tracing::Level::DEBUG`].
-    /// - `OTEL_TIMEOUT` - optional. Specifies the timeout for the exporter in
-    ///   **milliseconds**. Defaults to 1000ms, which is equivalent to 1 second.
     /// - `OTEL_ENVIRONMENT_NAME` - optional. Value for the
     ///   `deployment.environment.name` resource key according to the OTEL
     ///   conventions. Defaults to `"unknown"`.