環境準備：

環境部署：

設定mariadb的yum源並安裝（所有節點都要）(下載包的時候會很慢。。。。。)

vi /etc/yum.repos.d/mariadb.repo

[mariadb]

name = MariaDB

baseurl = http://yum.mariadb.org/10.1/centos7-amd64

gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB

gpgcheck=1

enabled=0

yum --enablerepo=mariadb -

配置第一個 節點（172.16.12.91）

vi /etc/my.cnf.d/server.cnf

[galera]

# Mandatory settings

wsrep_on=ON

wsrep_provider=/usr/lib64/galera/libgalera_smm.so

wsrep_cluster_address=“gcomm://172.16.12.91,172.16.12.92,172.16.12.93”

binlog_format=row

default_storage_engine=InnoDB

innodb_autoinc_lock_mode=2

bind-address=0.0.0.0

# add follows

# cluster name

wsrep_cluster_name="MariaDB_Cluster"

# own IP address（當前節點的IP）

wsrep_node_address="172.16.12.91"

# replication provider

wsrep_sst_method=rsync

啟動叢集：/bin/galera_new_cluster

設定root使用者密碼：mysql_secure_installation

配置第二個 節點(172.16.12.92)

vi /etc/my.cnf.d/server.cnf

[galera]

# Mandatory settings

wsrep_on=ON

wsrep_provider=/usr/lib64/galera/libgalera_smm.so

# specify all nodes in cluster

wsrep_cluster_address="gcomm://172.16.12.91,172.16.12.92,172.16.12.93 "

binlog_format=row

default_storage_engine=InnoDB

innodb_autoinc_lock_mode=2

bind-address=0.0.0.0

# add follows

# cluster name

wsrep_cluster_name="MariaDB_Cluster"

# own IP address（當前節點的IP）

wsrep_node_address="172.16.12.92"

# replication provider

wsrep_sst_method=rsync

啟動叢集節點：systemctl start mariadb

配置第三個 節點(172.16.12.93)

vi /etc/my.cnf.d/server.cnf

[galera]

# Mandatory settings

wsrep_on=ON

wsrep_provider=/usr/lib64/galera/libgalera_smm.so

# specify all nodes in cluster(所有節點的IP，這裡只有2臺機器)

wsrep_cluster_address="gcomm://172.16.12.91,172.16.12.92,172.16.12.93 "

binlog_format=row

default_storage_engine=InnoDB

innodb_autoinc_lock_mode=2

bind-address=0.0.0.0

# add follows

# cluster name

wsrep_cluster_name="MariaDB_Cluster"

# own IP address（當前節點的IP）

wsrep_node_address="172.16.12.93"

# replication provider

wsrep_sst_method=rsync

啟動叢集節點：systemctl start mariadb

注：當叢集宕機時，運行了/bin/galera_new_cluster命令的節點先啟動