Wait until ssh is available

debug.go

@@ -207,6 +207,11 @@ func debugHandler(kcfg config.KernelConfig, workPath, kernRegex, gdb string,
 	}
 	defer os.RemoveAll(tmp)
 
+	err = q.WaitForSSH(time.Minute)
+	if err != nil {
+		return
+	}
+
 	if ka.StandardModules {
 		// Module depends on one of the standard modules
 		err = copyStandardModules(q, ki)

pew.go

@@ -506,6 +506,11 @@ func whatever(swg *sizedwaitgroup.SizedWaitGroup, ka config.Artifact,
 		}
 	}
 
+	err = q.WaitForSSH(qemuTimeout)
+	if err != nil {
+		return
+	}
+
 	remoteTest, err := copyTest(q, testPath, ka)
 	if err != nil {
 		return

qemu/qemu-kernel.go

@@ -307,6 +307,20 @@ func (q *System) Stop() {
 	}
 }
 
+func (q System) WaitForSSH(timeout time.Duration) error {
+	for start := time.Now(); time.Since(start) < timeout; {
+		client, err := q.ssh("root")
+		if err != nil {
+			time.Sleep(time.Second / 10)
+			continue
+		}
+		client.Close()
+		return nil
+	}
+
+	return errors.New("no ssh (timeout)")
+}
+
 func (q System) ssh(user string) (client *ssh.Client, err error) {
 	cfg := &ssh.ClientConfig{
 		User:            user,