Install kubernetes on init / join and restart kubelet after reboot

Signed-off-by: Malte Poll <mp@edgeless.systems>

coordinator/kubernetes/kubernetes_test.go

@@ -1,6 +1,7 @@
 package kubernetes
 
 import (
+	"context"
 	"errors"
 	"testing"
 	"time"
@@ -20,12 +21,14 @@ func TestMain(m *testing.M) {
 }
 
 type stubClusterUtil struct {
+	installComponentsErr             error
 	initClusterErr                   error
 	setupPodNetworkErr               error
 	setupAutoscalingError            error
 	setupCloudControllerManagerError error
 	setupCloudNodeManagerError       error
 	joinClusterErr                   error
+	startKubeletErr                  error
 	restartKubeletErr                error
 	createJoinTokenResponse          *kubeadm.BootstrapTokenDiscovery
 	createJoinTokenErr               error
@@ -34,6 +37,10 @@ type stubClusterUtil struct {
 	joinConfigs [][]byte
 }
 
+func (s *stubClusterUtil) InstallComponents(ctx context.Context, version string) error {
+	return s.installComponentsErr
+}
+
 func (s *stubClusterUtil) InitCluster(initConfig []byte) error {
 	s.initConfigs = append(s.initConfigs, initConfig)
 	return s.initClusterErr
@@ -60,6 +67,10 @@ func (s *stubClusterUtil) JoinCluster(joinConfig []byte) error {
 	return s.joinClusterErr
 }
 
+func (s *stubClusterUtil) StartKubelet() error {
+	return s.startKubeletErr
+}
+
 func (s *stubClusterUtil) RestartKubelet() error {
 	return s.restartKubeletErr
 }