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提示: MySQL InnoDB Cluster底层依赖Group Replication模式,至少3台机器
1. 准备3台 CentOS Linux 7 (Core), 修改各主机名:db-host1, db-host2, db-host3 然后配置各台机器 hosts 映射, 对应如下
cat << EOF >> /etc/hosts 192.168.50.181 db-host1 192.168.50.182 db-host2 192.168.50.183 db-host3 EOF
2. 确保3台服务器要互相访问正常,为了保险期间请关闭防火墙,firewalld常用命令 如:
# 启动 systemctl start firewalld # 关闭 systemctl stop firewalld # 查看状态 systemctl status firewalld # 开机禁用 systemctl disable firewalld # 开机启用 systemctl enable firewalld # 查看所有打开的端口 firewall-cmd --zone=public --list-ports
3. 确保互访使用ssh 共享,这里使用root 账户 如:在db-host1 执行,其它以此类推:
ssh-keygen -t rsa ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.50.182 ssh-keygen -t rsa ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.50.183
4. 准备安装 mysql-community-server,mysql-shell,mysql-router 在3台机器安装,注意版本:
wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm rpm -ivh mysql80-community-release-el7-3.noarch.rpm yum install mysql-community-server
wget https://dev.mysql.com/get/Downloads/MySQL-Shell/mysql-shell-8.0.18-1.el7.x86_64.rpm rpm -ivh mysql-shell-8.0.18-1.el7.x86_64.rpm yum install mysql-shell
wget https://dev.mysql.com/get/Downloads/MySQL-Router/mysql-router-community-8.0.18-1.el7.x86_64.rpm rpm -ivh mysql-router-community-8.0.17-1.el7.x86_64.rpm yum install mysql-router
5. 安装完MysqlServer 后,依次每台初始化mysql,步骤如下:#初始化:
mysqld --initialize; #赋访问权限: chown mysql:mysql /var/lib/mysql -R #启动mysql服务: systemctl start mysqld.service; #设置mysql开机自启 mysql systemctl enable mysqld; #命令查看数据库的密码: cat /var/log/mysqld.log | grep password #进入mysql命令行: mysql -uroot -p (输入上述查看的数据库密码进入mysql命令行) #命令来修改密码: ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '密码'; #创建远程访问权限: create user 'root'@'%' identified with mysql_native_password by '密码'; GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION; flush privileges;
6. 由于依赖组复制,在host1 修改 /etc/my.cnf
server_id = 4000000161 loose-group_replication_group_name="a38e32fd-5fb6-11e8-ad7a-00259015d941" loose-group_replication_local_address= "192.168.50.181:3306" loose-group_replication_group_seeds= "192.168.50.181:3306,192.168.50.182:3306,192.168.50.183:3306" loose-group_replication_single_primary_mode=TRUE
然后拷贝 /etc/my.cnf到另外2台机器
rsync -e "ssh -p22" -avpgolr /etc/my.cnf root@192.168.50.182:/etc/ rsync -e "ssh -p22" -avpgolr /etc/my.cnf root@192.168.50.183:/etc/
确保各自 server_id 和 address
host1 server_id = 4000000161
loose-group_replication_local_address= "192.168.50.181:3306"
host2 server_id = 4000000162
loose-group_replication_local_address= "192.168.50.182:3306"
host3 server_id = 4000000163
loose-group_replication_local_address= "192.168.50.183:3306"
7. 3台mysql server 启动组复制
start group_replication
8. 检查实例配置, 使用 mysqlsh
dba.checkInstanceConfiguration('root@db-host1:3306') dba.checkInstanceConfiguration('root@db-host2:3306') dba.checkInstanceConfiguration('root@db-host3:3306')
8. 配置实例
dba.configureInstance('root@db-host1:3306',{'restart': true}) dba.configureInstance('root@db-host2:3306',{'restart': true}) dba.configureInstance('root@db-host3:3306',{'restart': true})
9. 创建添加实例
var cluster = dba.createCluster('mycluster'); var cluster=dba.getCluster('mycluster') cluster.addInstance('root@db-host2:3306'); cluster.addInstance('root@db-host3:3306');
10. 登录主服务器 ,查看,配置成功
mysql> select * from performance_schema.replication_group_members;
注意:由于8.0 中的一些变化和5.X配置有所配置不同,按照以前的配置容易出错,要善于对应分析日志进行排错
推荐参考资料:
https://blog.csdn.net/wzy0623/article/details/100779450
https://www.jianshu.com/p/6e2918845ec8
https://lefred.be/content/mysql-8-0-innodb-cluster-the-quick-hands-on-manual/
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