Mysql – Mariadb Galera cluster empty set

I am playing around with a MariaDB Galera Master Master Cluster and I have some issues which I do not understand.
[mysqld]
bind-address=0.0.0.0

[galera]
wsrep_on=ON
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
binlog_format=ROW
innodb_autoinc_lock_mode=2
innodb_locks_unsafe_for_binlog=1
query_cache_size=0
query_cache_type=0
default_storage_engine=InnoDB
innodb_log_file_size=100M
innodb_file_per_table
innodb_flush_log_at_trx_commit=2
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
wsrep_cluster_address="gcomm://"
wsrep_cluster_name='galera_cluster'
wsrep_node_address='192.168.2.67'
wsrep_node_name='KVM-1'
wsrep_sst_method=rsync
wsrep_sst_auth=repl_user:PASS

On the other nodes

[mysqld]
bind-address=0.0.0.0

[galera]
wsrep_on=ON
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
binlog_format=ROW
innodb_autoinc_lock_mode=2
innodb_locks_unsafe_for_binlog=1
query_cache_size=0
query_cache_type=0
default_storage_engine=InnoDB
innodb_log_file_size=100M
innodb_file_per_table
innodb_flush_log_at_trx_commit=2
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
wsrep_cluster_address="gcomm://IP_ADDR_MAIN_NODE,OTHER_NODES_ADDRS"
wsrep_cluster_name='galera_cluster'
wsrep_node_address='192.168.2.68'
wsrep_node_name='KVM-2'
wsrep_sst_method=rsync
wsrep_sst_auth=repl_user:PASS

when i login to mysql and query for

SHOW STATUS LIKE 'wsrep_cluster_size';
Empty set (0.00 sec)

Am i missing anything?