optimized(host): SetDumpStackSignal handler at startup

Author: zexi

pkg/appsrv/appsrv.go

@@ -574,16 +574,20 @@ func (app *Application) ListenAndServeWithoutCleanup(addr, certFile, keyFile str
 func (app *Application) ListenAndServeTLSWithCleanup2(addr string, certFile, keyFile string, onStop func(), isMaster bool) {
 	app.isTLS = true
 	httpSrv := app.initServer(addr)
+	log.Infof("listen on %s, isMaster: %v, certFile: %s, keyFile: %s", addr, isMaster, certFile, keyFile)
 	if isMaster {
 		app.addDefaultHandlers()
 		if app.enableProfiling {
 			addPProfHandler("", app)
 		}
 		app.httpServer = httpSrv
+		log.Infof("----------register cleanShutdown")
 		app.registerCleanShutdown(app.httpServer, onStop)
+		log.Infof("----------end register cleanShutdown")
 	} else {
 		app.slaveHttpServer = httpSrv
 	}
+	log.Infof("[listenAndServeInternal] listen on %s, isMaster: %v, certFile: %s, keyFile: %s", addr, isMaster, certFile, keyFile)
 	app.listenAndServeInternal(httpSrv, certFile, keyFile)
 	if isMaster {
 		app.waitCleanShutdown()

pkg/hostman/host_services.go

@@ -17,6 +17,7 @@ package hostman
 import (
 	execlient "yunion.io/x/executor/client"
 	"yunion.io/x/log"
+	"yunion.io/x/pkg/util/signalutils"
 
 	"yunion.io/x/onecloud/pkg/appsrv"
 	app_common "yunion.io/x/onecloud/pkg/cloudcommon/app"
@@ -157,6 +158,10 @@ func (host *SHostService) initHandlers(app *appsrv.Application) {
 }
 
 func StartService() {
+	// register dump stack signal handler at first
+	signalutils.SetDumpStackSignal()
+	signalutils.StartTrap()
+
 	var srv = &SHostService{}
 	srv.SServiceBase = &service.SServiceBase{
 		Service: srv,