fix: gracefully close goosed listening port (#5321)

Signed-off-by: V. Lascik <vlascik@users.noreply.github.com>

crates/goose-server/src/commands/agent.rs

@@ -8,6 +8,25 @@ use tracing::info;
 
 use goose::providers::pricing::initialize_pricing_cache;
 
+// Graceful shutdown signal
+#[cfg(unix)]
+async fn shutdown_signal() {
+    use tokio::signal::unix::{signal, SignalKind};
+
+    let mut sigint = signal(SignalKind::interrupt()).expect("failed to install SIGINT handler");
+    let mut sigterm = signal(SignalKind::terminate()).expect("failed to install SIGTERM handler");
+
+    tokio::select! {
+        _ = sigint.recv() => {},
+        _ = sigterm.recv() => {},
+    }
+}
+
+#[cfg(not(unix))]
+async fn shutdown_signal() {
+    let _ = tokio::signal::ctrl_c().await;
+}
+
 pub async fn run() -> Result<()> {
     // Initialize logging and telemetry
     crate::logging::setup_logging(Some("goosed"))?;
@@ -42,6 +61,10 @@ pub async fn run() -> Result<()> {
 
     let listener = tokio::net::TcpListener::bind(settings.socket_addr()).await?;
     info!("listening on {}", listener.local_addr()?);
-    axum::serve(listener, app).await?;
+    // Ensure the listener/socket is properly closed on cancellation by using graceful shutdown
+    axum::serve(listener, app)
+        .with_graceful_shutdown(shutdown_signal())
+        .await?;
+    info!("server shutdown complete");
     Ok(())
 }