centos 7 部署Mariadb集群

1、环境要求：
system：CetenOS 7
Server:

172.16.1.2 db1
172.16.1.3 db2
172.16.1.4 db3
模式：多主模式，通过wresp协议在全局实现底层数据片复制，任意节点可读写

2、开始配置

2.1 db1-3 创建三台服务器无秘钥登录
172.16.1.2 db1

vi /etc/hosts

–————编辑新增 i
172.16.1.2 db1
172.16.1.3 db2
172.16.1.4 db3
————保存 :wq

ssh-keygen -t rsa
ssh-copy-id -i /root/.ssh/id_rsa.pub db1
ssh-copy-id -i /root/.ssh/id_rsa.pub db2
ssh-copy-id -i /root/.ssh/id_rsa.pub db3

172.16.1.3 db2

ssh db2
vi /etc/hosts

–————编辑新增 i
172.16.1.2 db1
172.16.1.3 db2
172.16.1.4 db3
————保存 :wq

ssh-keygen -t rsa
ssh-copy-id -i /root/.ssh/id_rsa.pub db1
ssh-copy-id -i /root/.ssh/id_rsa.pub db2
ssh-copy-id -i /root/.ssh/id_rsa.pub db3

172.16.1.4 db3

ssh db3
vi /etc/hosts

–————编辑新增 i
172.16.1.2 db1
172.16.1.3 db2
172.16.1.4 db3
————保存 :wq

ssh-keygen -t rsa
ssh-copy-id -i /root/.ssh/id_rsa.pub db1
ssh-copy-id -i /root/.ssh/id_rsa.pub db2
ssh-copy-id -i /root/.ssh/id_rsa.pub db3
ssh db1

2.3 DB1-3关闭slinux

vi /etc/selinux/config
修改SELINUX=disabled ，保存然后重启服务器。
sestatus 查看状态

2.4 db1-3 卸载当前残留：

rpm -qa | grep mariadb
rpm -e –nodeps mariadb-libs-5.5.56-2.el7.x86_64
rpm -qa | grep mariadb

2.5 db1-3 同步时区
说明：执行tzselect命令–>选择Asia–>选择China–>选择 Beijing, Guangdong, Shanghai–>然后输入1 设置并验证时间是否与本机相同

tzselect > 5 > 9 > 1 > 1
TZ=’Asia/Shanghai’; export TZ
rm -rf /etc/localtime
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
date

2.6 配置数据库源(172.16.1.2)

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

—————编辑
[galera]
name=galera
baseurl=http://yum.mariadb.org/5.5.57/centos7-amd64/
gpgcheck=0
—————保存

scp /etc/yum.repos.d/galera.repo 172.16.1.3:/etc/yum.repos.d/
scp /etc/yum.repos.d/galera.repo 172.16.1.4:/etc/yum.repos.d/

2.7 db1-3安装数据库

yum install MariaDB-Galera-server -y
mkdir /home/data
cp -R /var/lib/mysql/ /home/data/
chown -R mysql:mysql /home/data/mysql
chmod -R 777 /home/data/

2.8配置数据库 ssh db1(172.16.1.2)

rpm -ql galera | grep -i smm.so

/usr/lib64/galera/libgalera_smm.so

vi /etc/my.cnf.d/server.cnf
————————编辑
[mysqld]
datadir=/home/data/mysql
socket=/var/lib/mysql/mysql.sock
character_set_server=utf8
slow_query_log=on
slow_query_log_file=/home/data/show_query_log.log
long_query_time=2
lower_case_table_names=1

[galera]
Mandatory settings
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
wsrep_cluster_address=”gcomm://172.16.1.2,172.16.1.3,172.16.1.4”
binlog_format=row
default_storage_engine=InnoDB
innodb_autoinc_lock_mode=2
bind-address=0.0.0.0
wsrep_cluster_name=”ysyj_galera_cluster”
—————–保存
scp /etc/my.cnf.d/server.cnf 172.16.1.34:/etc/my.cnf.d/server.cnf
scp /etc/my.cnf.d/server.cnf 172.16.1.36:/etc/my.cnf.d/server.cnf
/etc/init.d/mysql start –wsrep-new-cluster

db2-3：(172.16.1.3\172.16.1.4)

/etc/init.d/mysql start

数据同步测试：
Db1(172.16.1.2)

mysql
use mysql
UPDATE user SET password=password(‘passwd’) WHERE user=’root’;
flush privileges;
create database ceshi;
show databases;
exit

—————————-_查看db2 db3 是否同步了ceshi db
创建账号

create user ‘ceshi’@’localhost‘ identified by ‘ceshi001’

授权ceshi数据库的所有权限给该账号

grant all on ceshi.* to ceshi@’localhost’;

授权所有数据库的所有权限给该账号

grant all on . to ceshi@’localhost’;

导入数据看是否同步

mysql -uroot -pceshi001
create database ceshi;
use ceshi;
set names utf8;
source /home/ceshi.sql;

查看其他数据库的数据条数是否同步
select count(*) from ceshi; 查询数据库有多少条数据

查看集群状态

show status like ‘wsrep_%’;

Java代码配置链接方式

jdbc.url=jdbc:mysql:loadbalance://172.16.1.2:3306,172.16.1.3:3306,172.16.1.4:3306/ysyj_db?loadBalanceConnectionGroup=first&loadBalanceEnableJMX=true&useUnicode=true&characterEncoding=utf-8
jdbc.username=ceshi
jdbc.password=ceshi001
jdbc.initialSize=10
jdbc.maxActive=200
jdbc.minIdle=1
jdbc.maxWait=60000
datasource.proxy.interceptor=true #数据源切换拦截器使用标识，true：启用 false:停用

centos 7 部署Mariadb集群

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