Increase the net/http IdleTimeout

serverutil/http.go

@@ -47,12 +47,15 @@ func Serve(h http.Handler, serverConfig *ServerConfig, addr string) (err error)
 		}
 	}
 
+	// These are not meant to be external-facing servers, so we
+	// can be generous with the timeouts to keep the number of
+	// reconnections low.
 	srv := &http.Server{
 		Addr:         addr,
 		Handler:      instrumentHandler(h),
 		ReadTimeout:  30 * time.Second,
 		WriteTimeout: 30 * time.Second,
-		IdleTimeout:  60 * time.Second,
+		IdleTimeout:  600 * time.Second,
 		TLSConfig:    tlsConfig,
 	}