MariaDB Galera Services are down on all Nodes

Hello ,

We have newly moved to Open Source MariaDB Galera 10.2.25 supporting 3 nodes.

During OS Upgrade activity , we brought down all the three nodes .

First we brought the MariaDB service down on least loaded node and then one by one brought the MariaDB Galera Cluster down

After completion of maintenance , I was only able to Bootstrap the mostly Advance node using command sudo galera_new_cluster and remaining nodes , I was not able to bring up using sudo systemctl start MariaDB.

I have only 1 node which is UP and MariaDB service is Active and running.

I changed the safe_to_bootstrap to 1 in grastate.dat file and bootstrapped all the 3 nodes using sudo galera_new_cluster command

I am able to bring MariaDB service UP on the all the nodes. But now every node is a local node and not part of Cluster.

Kindly suggest how to resolve this issue.