Send sigterm and wait forever

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)

runtime/container.go

@@ -915,7 +915,6 @@ func (container *Container) Stop(seconds int) error {
 
 	// 1. Send a SIGTERM
 	if err := container.KillSig(15); err != nil {
-		utils.Debugf("Error sending kill SIGTERM: %s", err)
 		log.Print("Failed to send SIGTERM to the process, force killing")
 		if err := container.KillSig(9); err != nil {
 			return err

runtime/runtime.go

@@ -797,13 +797,18 @@ func (runtime *Runtime) shutdown() error {
 	group := sync.WaitGroup{}
 	utils.Debugf("starting clean shutdown of all containers...")
 	for _, container := range runtime.List() {
-		if container.State.IsRunning() {
-			utils.Debugf("stopping %s", container.ID)
+		c := container
+		if c.State.IsRunning() {
+			utils.Debugf("stopping %s", c.ID)
 			group.Add(1)
 
 			go func() {
 				defer group.Done()
-				container.Stop(10)
+				if err := c.KillSig(15); err != nil {
+					utils.Debugf("kill 15 error for %s - %s", c.ID, err)
+				}
+				c.Wait()
+				utils.Debugf("container stopped %s", c.ID)
 			}()
 		}
 	}