CentOS7搭建Galera Cluster(5.7)：
rpm下載網址：
http://galeracluster.com/downloads/
第1臺：
安裝：
yum install perl net-tools lsof socat perl-JSON perl-Data-Dumper libaio openssl-devel
rpm -e postfix
rpm -U /space/setup/5.7/mysql-wsrep-server-5.7-5.7.29-25.21.el7.x86_64.rpm /space/setup/5.7/mysql-wsrep-common-5.7-5.7.29-25.21.el7.x86_64.rpm /space/setup/5.7/mysql-wsrep-client-5.7-5.7.29-25.21.el7.x86_64.rpm /space/setup/5.7/mysql-wsrep-libs-5.7-5.7.29-25.21.el7.x86_64.rpm
yum install boost-devel rsync
rpm -i /space/setup/5.7/galera-3-25.3.29-1.el7.x86_64.rpm
mkdir /space/mysqldb/mysql -p
mkdir /space/mysqldb/mysql_logs
chown mysql /space/mysqldb -R
vi /etc/my.cnf （已有的全清空）
[mysqld]
datadir=/space/mysqldb/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
symbolic-links=0
binlog_format=ROW
bind-address=0.0.0.0
default_storage_engine=innodb
innodb_autoinc_lock_mode=2
innodb_flush_log_at_trx_commit=0
wsrep_cluster_name='ming'
wsrep-provider=/usr/lib64/galera-3/libgalera_smm.so
wsrep_cluster_address="gcomm://"
wsrep_node_name=galeraqa01
wsrep_node_address=10.0.1.3
wsrep_sst_method=rsync
wsrep_sst_auth=ming:xxxxx
log-error=/space/mysqldb/mysql_logs/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
:wq
systemctl start mysqld
systemctl enable mysqld
破解mysql root密碼（沒找到默認密碼）
vi /etc/my.cnf
skip-grant-tables
:wq
systemctl restart mysqld
mysql
use mysql;
update user set authentication_string=password('xxxxx') where user='root';
exit
vi /etc/my.cnf
#skip-grant-tables
:wq
systemctl restart mysqld
mysql -u root -p'xxxxx'
alter user root@'localhost' identified by 'xxxxxx';
show databases;
grant all on . to ming@'10.0.1.%' identified by 'xxxxx';
show status like 'wsrep_%';
別忘了firewall和selinux，沒特別要求可以關掉
第2臺：
除了下面部分調整下，其它都同第1臺
wsrep_cluster_address="gcomm://10.0.1.2,10.0.1.3,10.0.1.4"
wsrep_node_name=galeraqa02
wsrep_node_address=10.0.1.4
第3臺：
除了下面部分調整下，其它都同第1臺
wsrep_cluster_address="gcomm://10.0.1.2,10.0.1.3,10.0.1.4"
wsrep_node_name=galeraqa03
wsrep_node_address=10.0.1.5
最終通過 show status like 'wsrep_%'; 能看到3臺就說明都在集羣裏了
驗證：
在任1臺上新建庫，另2臺上會自動同步就說明沒問題了。