# cat <<- '__GALERA__' > /etc/yum.repos.d/galera.repo
	[galera]
	name = Galera
	baseurl = http://releases.galeracluster.com/centos/$releasever/$basearch
	gpgkey = http://releases.galeracluster.com/GPG-KEY-galeracluster.com
	enabled = 0
	gpgcheck = 1
__GALERA__

# rpm -ivh http://www.percona.com/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm
# sed -i 's/^enable.*/enable = 0/g' /etc/yum.repos.d/percona-release.repo

# yum --enablerepo=galera install galera-3 mysql-wsrep-5.6 mysql-wsrep-server-5.6 mysql-wsrep-libs-compat-5.6

# yum --enablerepo=percona-release-x86_64 install percona-xtrabackup-22

# mysql_install_db --random-passwords

# cat /root/.mysql_secret

ウィザードに従って色々初期設定してくれる。

# mysql_secure_installation

cat <<- __MY__ >> /etc/my.cnf
	binlog_format=ROW
	bind-address=0.0.0.0
	datadir=/var/lib/mysql
	socket=/var/lib/mysql/mysql.sock
	explicit_defaults_for_timestamp=true
	user=mysql
	# Disabling symbolic-links is recommended to prevent assorted security risks
	symbolic-links=0

	default_storage_engine=InnoDB
	innodb_autoinc_lock_mode=2
	innodb_flush_log_at_trx_commit=0
	innodb_file_per_table=on
	innodb_buffer_pool_size=20G
	innodb_log_file_size=256M
	innodb_log_files_in_group=20
	#innodb_additional_mem_pool_size=20M
	innodb_log_buffer_size=16M

	join_buffer_size = 128M
	sort_buffer_size = 2M
	read_rnd_buffer_size = 2M

	# Galera
	# Cluster setting
	wsrep_cluster_name="Galera_CLUSTER"
	wsrep_cluster_address="gcomm://"
	## インストールノードごとに名称を変えること ##
	wsrep_node_name="$( hostname -s )"
	wsrep_node_address=""
	wsrep_sst_receive_address=""
	wsrep_sst_method="xtrabackup-v2"
	wsrep_sst_auth="xtrabk:WGHI6t84oaiCh8"
	wsrep_slave_threads=4
	#wsrep_received_bytes=6637093
	#wsrep_repl_data_bytes=265035226
	#wsrep_incoming_address=""
	wsrep_provider="/usr/lib64/galera-3/libgalera_smm.so"
	#wsrep_provider_options=""

	# Xtrabackup setting
	[sst]
	compressor="gzip"
	decompressor="gzip -dc"
	rebuild=1
	compact=1
	encrypt=0
	#tkey=""
	#tcert=""
	#tca=""

	[mysqld_safe]
	log-error=/var/log/mysqld.log
	pid-file=/var/run/mysqld/mysqld.pid
	
	[client]
	socket=/var/lib/mysql/mysql.sock

__MY__
<code>

=== Xtrabackup用アカウント追加 ===

<code>
mysql>GRANT ALL PRIVILEGES ON *.* TO xtrabk@'localhost' IDENTIFIED BY 'WGHI6t84oaiCh8';
FLUSH PRIVILEGES;

# /etc/init.d/mysql start --wsrep-new-cluster

mysql> set global wsrep_cluster_address='gcomm://192.168.10.11';

wsrep_cluster_sizeクラスタのノード数

mysql> show status like 'wsrep%';
wsrep_local_state_comment    | Synced
wsrep_cluster_size           | 3