diff --git a/pkg/server/signal.go b/pkg/server/signal.go index 0ea19d660..e5334ae4c 100644 --- a/pkg/server/signal.go +++ b/pkg/server/signal.go @@ -17,6 +17,7 @@ limitations under the License. package server import ( + "context" "os" "os/signal" ) @@ -27,21 +28,30 @@ var shutdownHandler chan os.Signal // SetupSignalHandler registered for SIGTERM and SIGINT. A stop channel is returned // which is closed on one of these signals. If a second signal is caught, the program // is terminated with exit code 1. +// Only one of SetupSignalContext and SetupSignalHandler should be called, and only can +// be called once. func SetupSignalHandler() <-chan struct{} { + return SetupSignalContext().Done() +} + +// SetupSignalContext is same as SetupSignalHandler, but a context.Context is returned. +// Only one of SetupSignalContext and SetupSignalHandler should be called, and only can +// be called once. +func SetupSignalContext() context.Context { close(onlyOneSignalHandler) // panics when called twice shutdownHandler = make(chan os.Signal, 2) - stop := make(chan struct{}) + ctx, cancel := context.WithCancel(context.Background()) signal.Notify(shutdownHandler, shutdownSignals...) go func() { <-shutdownHandler - close(stop) + cancel() <-shutdownHandler os.Exit(1) // second signal. Exit directly. }() - return stop + return ctx } // RequestShutdown emulates a received event that is considered as shutdown signal (SIGTERM/SIGINT)