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)

Author: afbjorklund

Diff for: pkg/minikube/bootstrapper/kubeadm/kubeadm.go

@@ -109,6 +109,8 @@ func (k *KubeadmBootstrapper) StartCluster(k8s config.KubernetesConfig) error {
 	// that we also stick in /etc/kubernetes/manifests
 	// We use --ignore-preflight-errors=Swap since minikube.iso allocates a swap partition.
 	// (it should probably stop doing this, though...)
+	// 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

Diff for: 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}} --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests --ignore-preflight-errors=Swap"))
+var kubeadmInitTemplate = template.Must(template.New("kubeadmInitTemplate").Parse("sudo /usr/bin/kubeadm init --config {{.KubeadmConfigFile}} --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests --ignore-preflight-errors=Swap --ignore-preflight-errors=CRI"))
 
 // printMapInOrder sorts the keys and prints the map in order, combining key
 // value pairs with the separator character