Install galera cluster without remove existing mariadb I have to setup Galera cluster in one of my production servers.

OS: Ubuntu 14.04
Existing mysql: maridb 10.1


While installing this cluster, its asking to remove the existing mariadb-server-10.1

How can I install this without remove anything?
If you installed MariaDB 10.1, you don't need to remove anything because MariaDB Server and MariaDB Galera Server packages have been combined and Galera packages and their dependencies get installed automatically when installing MariaDB 10.1.

So you must only configure galera without remove anything.

Reference