本linux为centos6.4 之前安装过mariaDB 5.5.32a，现尝试更新为 MariaDB Galera Cluster 10.0.12.

由于以前的 mariaDB5.5 安装的目录为 /usr/local/mysql

所以进行 rm -rf /usr/local/mysql

然后 cd/etc/yum.repos.d

由于 MariaDB Galera Cluster 10.0.12. 依赖于socat 且 centos6.4自带的源 没有socat，所以需要自己配置源并安装。

wget http://www.convirture.com/repos/definitions/rhel/6.x/convirt.repo

yum install socat

安装完 socat之后 开始配置mariaDB的源 并安装。源的配置文件信息可以在官网上获得。地址为

https://downloads.mariadb.org/mariadb/repositories/#mirror=neusoft&distro=CentOS&distro_release=centos6-x86&version=10.0

依据本机内容获取的配置为

# MariaDB 10.0 CentOS repository list - created 2014-08-06 07:07 UTC
# http://mariadb.org/mariadb/repositories/
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.0/centos6-x86
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

在 /etc/yum.repos.d 目录下 运行命令

touch MariaDB.repo

vi MariaDB.repo

将上面的配置文件内容写入。保存。

yum install MariaDB-Galera-server MariaDB-client galera

安装 MariaDB Galera Cluster 10.0.12.

修改配置文件 /etc/my.cnf

将图片中的配置项 对应修改。

在 master机器 运行命令

mysqld --wsrep-new-cluster

=================我是华丽的分割线===========================

在slave机器 也如上安装。

在slave机器运行

$ mysqld --wsrep_cluster_address=gcomm://192.168.0.1  # DNS names work as well

在slave机器的test库中随意创建一个测试表。引擎为innoDB.并插入数据

连接master库 查询 刚才的数据。成功。配置完成。

本机的 my.cnf文件最终内容为

# Example MariaDB config file for very large systems.
#
# This is for a large system with memory of 1G-2G where the system runs mainly
# MariaDB.
#
# MariaDB programs look for option files in a set of
# locations which depend on the deployment platform.
# You can copy this option file to one of those
# locations. For information about these locations, do:
# 'my_print_defaults --help' and see what is printed under
# Default options are read from the following files in the given order:
# More information at: http://dev.mysql.com/doc/mysql/en/option-files.html
#
# In this file, you can use all long options that a program supports.
# If you want to know which options a program supports, run the program
# with the "--help" option.

# The following options will be passed to all MySQL clients
[client]
#password	= your_password
port		= 3306
socket		= /tmp/mysql.sock

# Here follows entries for some specific programs

# The MySQL server
[mysqld]
datadir = /data/mysql
port		= 3306
socket		= /tmp/mysql.sock
skip-external-locking
key_buffer_size = 384M
max_allowed_packet = 1M
table_open_cache = 512
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
#query_cache_size = 32M
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 8

# Point the following paths to a dedicated disk
#tmpdir		= /tmp/

# Don't listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the "enable-named-pipe" option) will render mysqld useless!
# 
#skip-networking

# Replication Master Server (default)
# binary logging is required for replication
log-bin=mysql-bin

# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id	= 1

# Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -
#    the syntax is:
#
#    CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
#    MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
#
#    where you replace <host>, <user>, <password> by quoted strings and
#    <port> by the master's port number (3306 by default).
#
#    Example:
#
#    CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
#    MASTER_USER='joe', MASTER_PASSWORD='secret';
#
# OR
#
# 2) Set the variables below. However, in case you choose this method, then
#    start replication for the first time (even unsuccessfully, for example
#    if you mistyped the password in master-password and the slave fails to
#    connect), the slave will create a master.info file, and any later
#    change in this file to the variables' values below will be ignored and
#    overridden by the content of the master.info file, unless you shutdown
#    the slave server, delete master.info and restart the slaver server.
#    For that reason, you may want to leave the lines below untouched
#    (commented) and instead use CHANGE MASTER TO (see above)
#
# required unique id between 2 and 2^32 - 1
# (and different from the master)
# defaults to 2 if master-host is set
# but will not function as a slave if omitted
#server-id       = 2
#
# The replication master for this slave - required
#master-host     =   <hostname>
#
# The username the slave will use for authentication when connecting
# to the master - required
#master-user     =   <username>
#
# The password the slave will authenticate with when connecting to
# the master - required
#master-password =   <password>
#
# The port the master is listening on.
# optional - defaults to 3306
#master-port     =  <port>
#
# binary logging - not required for slaves, but recommended
#log-bin=mysql-bin
#
# binary logging format - mixed recommended 
binlog_format=ROW

# Uncomment the following if you are using InnoDB tables
#innodb_data_home_dir = /data/mysql
#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend
#innodb_log_group_home_dir = /data/mysql
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
#innodb_buffer_pool_size = 384M
#innodb_additional_mem_pool_size = 20M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 100M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50
wsrep_provider = /usr/lib/galera/libgalera_smm.so
wsrep_cluster_address = 'gcomm://'
default_storage_engine=innoDB
innodb_autoinc_lock_mode=2
innodb_doublewrite=1
query_cache_size=0
innodb_flush_log_at_trx_commit = 2

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates

[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

安装过程参考

https://mariadb.com/kb/en/mariadb/documentation/replication-cluster-multi-master/galera/getting-started-with-mariadb-galera-cluster/