Fail fast if waiting for SSH to be available

Integration tests were running long because we'd wait up to 22 minutes for SSH to succeed while creating the host. This commit introduces a two minute timer on creating the host. On my Macbook Pro with the docker driver, creating the host takes 5 seconds, so 2 minutes should be more than enough time.

Refer to kubernetes#6608

pkg/minikube/cluster/start.go

@@ -134,10 +134,9 @@ func createHost(api libmachine.API, cfg config.MachineConfig) (*host.Host, error
 
 	cstart := time.Now()
 	glog.Infof("libmachine.API.Create for %q (driver=%q)", cfg.Name, cfg.VMDriver)
-	if err := api.Create(h); err != nil {
-		// Wait for all the logs to reach the client
-		time.Sleep(2 * time.Second)
-		return nil, errors.Wrap(err, "create")
+	// Allow two minutes to create host before failing fast
+	if err := timedCreateHost(h, api, 2*time.Minute); err != nil {
+		return nil, errors.Wrap(err, "creating host")
 	}
 	glog.Infof("libmachine.API.Create for %q took %s", cfg.Name, time.Since(cstart))
 
@@ -151,6 +150,32 @@ func createHost(api libmachine.API, cfg config.MachineConfig) (*host.Host, error
 	return h, nil
 }
 
+func timedCreateHost(h *host.Host, api libmachine.API, t time.Duration) error {
+	timeout := make(chan bool, 1)
+	go func() {
+		time.Sleep(t)
+		timeout <- true
+	}()
+
+	createFinished := make(chan bool, 1)
+	var err error
+	go func() {
+		err = api.Create(h)
+		createFinished <- true
+	}()
+
+	select {
+	case <-createFinished:
+		if err != nil {
+			time.Sleep(2 * time.Second)
+			return errors.Wrap(err, "create")
+		}
+		return nil
+	case <-timeout:
+		return fmt.Errorf("create host timed out in %f seconds", t.Seconds())
+	}
+}
+
 // postStart are functions shared between startHost and fixHost
 func postStartSetup(h *host.Host, mc config.MachineConfig) error {
 	glog.Infof("post-start starting for %q (driver=%q)", h.Name, h.DriverName)