yum安装mysql8.0（或离线环境）主从复制

# 有互联网环境下，初始化服务器环境

mv /etc/yum.repos.d /etc/yum.repos.d_bak && \

mkdir /etc/yum.repos.d && \

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo && \

curl -o /etc/yum.repos.d/epel.repo https://mirrors.aliyun.com/repo/epel-7.repo && \

yum clean all && \

yum makecache fast && \

yum -y install vim net-tools sysstat nmon nfs-utils lsof fio wget unzip && \

systemctl stop firewalld && \

systemctl stop NetworkManager && \

systemctl disable firewalld && \

systemctl disable NetworkManager && \

sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config && \

echo '* soft nofile 65535' >> /etc/security/limits.conf && \

echo '* hard nofile 65535' >> /etc/security/limits.conf

#如已做过简单初始化或云服务器可不用执行初始化，但需要安装yum-utils，用以导出所有mysql的安装包及依赖包在离线环境下安装