Ignore preflight errors from CRI (dockershim.sock)

kubeadm init is running `crictl -r /var/run/dockershim.sock info`
before the socket actually exists (kubelet hasn't started up yet)

pkg/minikube/bootstrapper/kubeadm/kubeadm.go

@@ -105,6 +105,8 @@ func (k *KubeadmBootstrapper) GetClusterLogs(follow bool) (string, error) {
 func (k *KubeadmBootstrapper) StartCluster(k8s bootstrapper.KubernetesConfig) error {
 	// We use --skip-preflight-checks since we have our own custom addons
 	// that we also stick in /etc/kubernetes/manifests
+	// We use --ignore-preflight-errors=CRI since /var/run/dockershim.sock is not present.
+	// (because we start kubelet with an invalid config)
 	b := bytes.Buffer{}
 	if err := kubeadmInitTemplate.Execute(&b, struct{ KubeadmConfigFile string }{constants.KubeadmConfigFile}); err != nil {
 		return err

pkg/minikube/bootstrapper/kubeadm/templates.go

@@ -71,7 +71,7 @@ sudo /usr/bin/kubeadm alpha phase controlplane all --config {{.KubeadmConfigFile
 sudo /usr/bin/kubeadm alpha phase etcd local --config {{.KubeadmConfigFile}}
 `))
 
-var kubeadmInitTemplate = template.Must(template.New("kubeadmInitTemplate").Parse("sudo /usr/bin/kubeadm init --config {{.KubeadmConfigFile}} --skip-preflight-checks"))
+var kubeadmInitTemplate = template.Must(template.New("kubeadmInitTemplate").Parse("sudo /usr/bin/kubeadm init --config {{.KubeadmConfigFile}} --skip-preflight-checks --ignore-preflight-errors=CRI"))
 
 // printMapInOrder sorts the keys and prints the map in order, combining key
 // value pairs with the separator character