mysql galera cluster - shutdown and restart

Dear All,

I have followed the below tutorial to install galera cluster with mysql-5-6 on ubuntu-16-04, and installed successfully using 3 node (VMs). but after stop mysql from node 3 and 2 then stop galera form node 1 then shutdown the VM. and when try to restart galera it fails!

n3usr@node3:~$ sudo systemctl stop mysql => successfully stopped n2usr@node2:~$ sudo systemctl stop mysql => successfully stopped n1usr@node1:~$ sudo /etc/init.d/mysql stop --wsrep-new-cluster => successfully stopped

once restarted the node1 try to start cluster but fails… n1usr@node1:~$ sudo /etc/init.d/mysql start --wsrep-new-cluster [sudo] password for n1usr:
Starting MySQL .210227 06:45:06 mysqld_safe Directory ‘/var/run/mysqld’ for UNIX socket file don’t exists.

• The server quit without updating PID file (/var/run/mysqld/mysqld.pid).

it would be great help if you let me know how to successfully stop cluster and shutdown the server then start again the cluster once server is up and running.

tutorial link -> https://www.digitalocean.com/community/tutorials/how-to-configure-a-galera-cluster-with-mysql-5-6-on-ubuntu-16-04