MariaDB Galera cluster my.cnf

my.cnf

# -----------------------#
# ----- References ----- #
# -----------------------#
#
# * Options for Galera cluster 
# ------------------------------------------
# https://mariadb.com/kb/en/mariadb/galera-cluster/
# http://galeracluster.com/documentation-webpages/index.html
# https://www.digitalocean.com/community/tutorials/how-to-configure-a-galera-cluster-with-mariadb-10-1-on-ubuntu-16-04-servers
#
# * Character-sets and collations
# ------------------------------------------
# https://mariadb.com/kb/en/mariadb/setting-character-sets-and-collations/#example-changing-the-default-character-set-to-utf-8]
# https://mariadb.com/kb/en/mariadb/supported-character-sets-and-collations/
#


[client]
default-character-set=utf8
socket=/var/lib/mysql/mysql.sock


[mysql]
default-character-set=utf8


[mysqld]
datadir=/var/lib/mysql/data
socket=/var/lib/mysql/mysql.sock
bind-address=0.0.0.0
log-bin=mariadb_galera.bin
binlog_format=ROW

default-storage-engine=innodb
innodb_autoinc_lock_mode=2
innodb_flush_log_at_trx_commit=0
innodb_buffer_pool_size=256M

# char-set
collation-server = utf8_unicode_ci
init-connect='SET NAMES utf8'
character-set-server = utf8

# replication configuration
wsrep_on=ON
wsrep_sst_method=rsync
wsrep_provider=/usr/lib/galera/libgalera_smm.so
wsrep_cluster_name="galera_cluster"
wsrep_cluster_address="gcomm://master01,master02,master03"
#wsrep_node_address="this_node_ip"
#wsrep_node_name="this_node_name"


[mysql_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

Tips - change datadir to somewhere having enough space.