Print endpoint addresses at startup (#867)

* print tracing and metrics endpoints in startup

* print network address in startup

zebra-network/src/peer_set/initialize.rs

@@ -191,6 +191,8 @@ where
     S::Future: Send + 'static,
 {
     let mut listener = TcpListener::bind(addr).await?;
+    let local_addr = listener.local_addr()?;
+    info!("Network listening at {}", local_addr);
     loop {
         if let Ok((tcp_stream, addr)) = listener.accept().await {
             debug!(?addr, "got incoming connection");

zebrad/src/components/metrics.rs

@@ -30,7 +30,7 @@ impl MetricsEndpoint {
             return Ok(());
         };
 
-        info!("Initializing metrics endpoint");
+        info!("Initializing metrics endpoint at {}", addr);
 
         // XXX do we need to hold on to the receiver?
         let receiver = Receiver::builder()

zebrad/src/components/tracing/endpoint.rs

@@ -41,7 +41,7 @@ impl TracingEndpoint {
         } else {
             return Ok(());
         };
-        info!("Initializing tracing endpoint");
+        info!("Initializing tracing endpoint at {}", addr);
 
         let service =
             make_service_fn(|_| async { Ok::<_, hyper::Error>(service_fn(request_handler)) });