搭建mysql集群，使用Percona XtraDB Cluster搭建

Percona XtraDB Cluster提供的特性有：
1.同步复制，事务要么在所有节点提交或不提交。
2.多主复制，可以在任意节点进行写操作。
3.在从服务器上并行应用事件，真正意义上的并行复制。
4.节点自动配置。
5.数据一致性，不再是异步复制。

开始搭建：

三台服务器：先设置hosts
10.0.0.231  node1
10.0.0.232  node2
10.0.0.233  node3

1：下载安装文件

   官网：https://www.percona.com

   下载地址：https://www.percona.com/downloads/Percona-XtraDB-Cluster-LATEST/Percona-XtraDB-Cluster-5.7.18-29.20/binary/tarball/Percona-XtraDB-Cluster-5.7.18-rel15-29.20.1.Linux.x86_64.ssl100.tar.gz

2：解压到指定目录

tar -zxvf  Percona-XtraDB-Cluster-5.7.18-rel15-29.20.1.Linux.x86_64.ssl101.tar.gz  -C /usr/local

 ln -s  Percona-XtraDB-Cluster-5.7.18-rel15-29.20.1.Linux.x86_64.ssl101  mysql5.7

3：创建目录

mkdir -p /usr/local/mysql5.7/data
mkdir -p /usr/local/mysql5.7/tmp

4:创建用户

useradd -d /usr/local/mysql5.7 -m mysql
chown -R /usr/local/mysql5.7 
chmod 600 /usr/local/mysql5.7 

5:配制/etc/my.cnf

note1:

[mysqld]

server_id=231
datadir=/usr/local/mysql5.7/data
user=mysql
basedir=/usr/local/mysql5.7

default_storage_engine=Innodb

innodb_buffer_pool_size=1610612736
innodb_log_file_size=104857600


wsrep_provider=/usr/local/mysql5.7/lib/libgalera_smm.so
wsrep_cluster_address=gcomm://10.0.0.231,10.0.0.232,10.0.0.233
wsrep_node_name=node1
wsrep_node_address=10.0.0.231
wsrep_cluster_name=pxc_sampson
wsrep_sst_auth=sst:sampson
wsrep_sst_method=rsync
wsrep_slave_threads=2
pxc_strict_mode=ENFORCING
innodb_autoinc_lock_mode=2
wsrep_provider_options="debug=1;gcache.size=1G"

note2:

[mysqld] 
server_id=232
datadir=/usr/local/mysql5.7/data
user=mysql
basedir=/usr/local/mysql5.7

default_storage_engine=Innodb

innodb_buffer_pool_size=1610612736
innodb_log_file_size=104857600


wsrep_provider=/usr/local/mysql5.7/lib/libgalera_smm.so
wsrep_cluster_address=gcomm://10.0.0.231,10.0.0.232,10.0.0.233
wsrep_node_name=node2
wsrep_node_address=10.0.0.232
wsrep_cluster_name=pxc_sampson
wsrep_sst_auth=sst:sampson
wsrep_sst_method=rsync
wsrep_slave_threads=2
pxc_strict_mode=ENFORCING
innodb_autoinc_lock_mode=2
wsrep_provider_options="debug=1;gcache.size=1G"

note3:

[mysqld]

server_id=233
datadir=/usr/local/mysql5.7/data
user=mysql
basedir=/usr/local/mysql5.7 
default_storage_engine=Innodb

innodb_buffer_pool_size=1610612736
innodb_log_file_size=104857600


wsrep_provider=/usr/local/mysql5.7/lib/libgalera_smm.so
wsrep_cluster_address=gcomm://10.0.0.231,10.0.0.232,10.0.0.233
wsrep_node_name=node3
wsrep_node_address=10.0.0.233
wsrep_cluster_name=pxc_sampson
wsrep_sst_auth=sst:sampson
wsrep_sst_method=rsync
wsrep_slave_threads=2
pxc_strict_mode=ENFORCING
innodb_autoinc_lock_mode=2
wsrep_provider_options="debug=1;gcache.size=1G"

 6:初始化mysql

  note1,note2,note3

 /usr/local/mysql5.7/bin/mysql_install_db  --defaults-file=/etc/my.cnf  --user=mysql --basedir=/usr/local/mysql5.7/ --datadir=/usr/local/mysql5.7/data/

7：启动第一个节点

  node1:

/usr/local/mysql5.7/bin/mysqld_safe --ledir=/usr/local/mysql5.7/bin --wsrep-new-cluster &
完成后Ctrl+C

8：修改mysql密码

查看初使密码
 cat /root/.mysql_secret 
  假设初始密码为abcde

修改初始密码

  先进入mysql命令行：mysql -u root -p
  输入初始密码abcde
 修改初始密码：SET PASSWORD = PASSWORD('123456');

9：启动第二，三个节点

  node2,node3

/usr/local/mysql5.7/bin/mysqld_safe --ledir=/usr/local/mysql5.7/bin &

10:查看

 登录mysql

 mysql>show global status like 'wsrep_cluster_size';

mysql>show global status like 'wsrep%';

11:设置开机启动

cp /usr/local/mysql5.7/support-files/mysql.server /etc/init.d/mysql …复制启动文件 

chmod 755 /etc/init.d/mysql    …增加执行权限 

chkconfig --add mysql    …加入自动启动项

chkconfig  --level 2345 mysql on  …设置MySQL 在345 等级自动启动

12：环境变量

export PATH=/usr/local/mysq5.7l/bin:$PATH