安装

# 下载
wget https://cdn.mysql.com/archives/mysql-8.0/mysql-8.0.30-1.el7.x86_64.rpm-bundle.tar
# 解压
tar -xvf mysql-8.0.30-1.el7.x86_64.rpm-bundle.tar
# 强制安装
rpm  -ivh  *.rpm --nodeps --force

配置

通过快速配置脚本进行数据库的配置

1. 初始化mysql和root用户，root用户不开放外网访问
2. 新建非root用户，开放所有库和表权限，外网可访问

#!/bin/bash
# 备份配置文件
cur_time=`date +%Y%m%d.%H%m%s`
cp /etc/my.cnf /etc/my.cnf.${cur_time}.bak
# 临时关闭SELINUX
setenforce 0;

# ***********************************************************
# ****************** 初始化MySQL配置 *************************
# ***********************************************************

# 初始化mysql数据库实例信息
echo '初始化mysql数据库信息...';
echo '【提示】若输入为空，将读取默认值！';

# 修改MySQL数据库配置（按实际需求添加，切勿重复执行）
read -p "Are you need init mysql database? Defalut value is N. Y/N：" IS_NEED_INIT;
if [ "$IS_NEED_INIT" == 'Y' ]
 then 
  read -p "Enter the Port of mysql，default is 3306：" MYSQL_PORT
  if [ -z ${MYSQL_PORT} ] 
   then 
     echo 'your input is null！take the default value：3306';
     MYSQL_PORT=3306; 
   else 
     echo ${MYSQL_PORT}; 
  fi 

  read -p "Enter the Password of mysql user root，default is 123456：" MYSQL_ROOT_PWD;
  if [ -z ${MYSQL_ROOT_PWD} ] 
   then 
    echo 'your input is null！take the default value：123456'; 
    MYSQL_ROOT_PWD=123456; 
  else 
   echo ${MYSQL_ROOT_PWD}; 
  fi
  
  read -p "Enter the lower_case_table_names of mysql，default is 1：" MYSQL_LCTN;
  if [ -z ${MYSQL_LCTN} ] 
   then 
    echo 'your input is null！take the default value：1'; 
    MYSQL_LCTN=1; 
  else 
   echo ${MYSQL_LCTN}; 
  fi 

  read -p "Enter the max_connections of mysql，default is 500：" MYSQL_MC;
  if [ -z ${MYSQL_MC} ] 
   then 
    echo 'your input is null！take the default value：500'; 
    MYSQL_MC=500; 
   else 
    echo ${MYSQL_MC}; 
  fi 

  read -p "Enter the max_connect_errors of mysql，default is 20：" MYSQL_MCE;
  if [ -z ${MYSQL_MCE} ] 
   then 
    echo 'your input is null！take the default value：20'; 
    MYSQL_MCE=20;
   else 
    echo ${MYSQL_MCE}; 
  fi  

  read -p "Enter the default-time_zone of mysql，default is '+08:00'：" MYSQL_DTZ;
  if [ -z ${MYSQL_DTZ} ] 
   then 
    echo "your input is null！take the default value：'+08:00'"; 
    MYSQL_DTZ='+08:00';
   else 
    echo ${MYSQL_DTZ}; 
  fi 

  echo -e "\n#端口\nport=${MYSQL_PORT}" >> /etc/my.cnf;
  echo -e "\n#区分大小写\nlower_case_table_names=${MYSQL_LCTN}" >> /etc/my.cnf;
  echo -e "\n#允许最大连接数\nmax_connections=${MYSQL_MC}" >> /etc/my.cnf
  echo -e "\n#允许连接失败的次数\nmax_connect_errors=${MYSQL_MCE}" >> /etc/my.cnf
  echo -e "\n#设置默认时区\ndefault-time_zone=${MYSQL_DTZ}" >> /etc/my.cnf  
 
  echo 'MySQL服务正在重启，请稍候...';
  systemctl restart mysqld.service
  # 等待5秒
  sleep $[5] 
  systemctl status mysqld.service
  # 修改root密码
  # 获取初始默认密码
  tmp=`grep 'temporary password' /var/log/mysqld.log`
  oldPwd=${tmp##*': '}
  # 修改root密码
  mysql -uroot  -p${oldPwd} -P${MYSQL_PORT} --connect-expired-password -e "ALTER USER 'root'@'localhost' IDENTIFIED BY '${MYSQL_ROOT_PWD}';flush privileges;"
  echo 'MySQL服务root密码修改完成，初始密码为:['${oldPwd}'],新密码为:['${MYSQL_ROOT_PWD}']';
 else 
  echo 'init passed!';
fi


# ***********************************************************
# ****************** 新建非root用户，拥有对所有库和表的增删改查操作 ********************
# ***********************************************************

echo '新建非root用户，拥有对所有库和表的增删改查操作...';
echo '【提示】若输入为空，将读取默认值！';

read -p "Enter the Port of mysql，default is 3306：" MYSQL_PORT
  if [ -z ${MYSQL_PORT} ] 
   then 
     echo 'your input is null！take the default value：3306';
     MYSQL_PORT=3306; 
   else 
     echo ${MYSQL_PORT}; 
  fi 

  read -p "Enter the Password of mysql user root，default is 123456：" MYSQL_ROOT_PWD;
  if [ -z ${MYSQL_ROOT_PWD} ] 
   then 
    echo 'your input is null！take the default value：123456'; 
    MYSQL_ROOT_PWD=123456; 
  else 
   echo ${MYSQL_ROOT_PWD}; 
  fi

read -p "Enter the Username of mysql，default is tom：" MYSQL_UN;
if [ -z "${MYSQL_UN}"]
 then
  echo 'your input is null！take the default value：tom';
  MYSQL_UN=tom; 
 else 
  echo ${MYSQL_UN}; 
fi

read -p "Enter the Password of mysql user ${MYSQL_UN}，default is 123456：" MYSQL_PWD;
if [ -z "${MYSQL_PWD}"]
 then
  echo 'your input is null！take the default value：123456';
  MYSQL_PWD=123456; 
 else 
  echo ${MYSQL_PWD}; 
fi

echo '正在初始化${MYSQL_UN}用户...';
mysql -uroot  -p${MYSQL_ROOT_PWD} -P${MYSQL_PORT} -e "
create user '${MYSQL_UN}'@'%' identified by '${MYSQL_PWD}';
grant all privileges on *.* to '${MYSQL_UN}'@'%';
flush privileges;"
echo '${MYSQL_UN}用户创建完毕...';