CentOS7 MySql Galera Cluster 安装步骤

1，检查系统是否安装MySQL，已安装则需要卸载干净 查看 systemctl status mysqld.service 2，关闭防火墙 查看 systemctl stop firewalld.service ； 关闭 systemctl disable firewalld.service；systemctl disable firewalld.service 3，安装依赖包 yum -y in

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