centos自动安装mysql

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——每次安装MysqL，劳神费力，时间宝贵安能浪费

——CentOS6.5 CentOS7.2 自测成功

——现在自己装MysqL都是用这个，那叫一个舒爽

安装：下载 mysql.rar 文件按照 readme.txt 操作即可

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或者也可以自己倒腾

shell文件：

#!/bin/sh

#关闭进程
/etc/init.d/MysqLd stop
killall MysqLd
pids=($(ps -ef | grep MysqL | awk '{print $2}'))
for((i=0; i<${#pids[@]}; i++));do
  echo "关闭进程: pid ${pids[i]}"
  kill -9 ${pids[i]}
done

#uninstall MariaDB
mariadb=($(rpm -qa|grep -i MariaDB))
for((i=0; i<${#mariadb[@]}; i++));do
  echo "旧版mariadb: ${mariadb[i]}"
  echo "删除..."
  yum -y remove ${mariadb[i]}
done
#强制卸载，防止残留
mariadb=($(rpm -qa|grep -i MariaDB))
for((i=0; i<${#mariadb[@]}; i++));do
  echo "旧版mariadb: ${mariadb[i]}"
  echo "强制删除..."
  rpm -e --nodeps ${mariadb[i]}
  rpm -e --noscripts ${mariadb[i]}
done

#uninstall old MysqL
old_MysqL=($(rpm -qa|grep -i MysqL))
for((i=0; i<${#old_MysqL[@]}; i++));do
  echo "旧版MysqL: ${old_MysqL[i]}"
  echo "删除..."
  yum -y remove java ${old_MysqL[i]}
done
#remove old MysqL files
old_MysqL_file=($(find / -name MysqL))
for((i=0; i<${#old_MysqL_file[@]}; i++));do
  echo "旧版MysqL文件: ${old_MysqL_file[i]}"
  if [[ ${old_MysqL_file[i]} =~ "/usr/MysqL" ]]
  then
    continue
  fi  
  echo "删除..."
  rm -rf ${old_MysqL_file[i]}
done
#remove setting files
rm -rf /var/log/MysqLd.log
rm -rf /etc/my.cnf*
rm -rf /run/MysqLd/*
rm -rf /usr/bin/MysqL*

#find zip MysqL file
srcPath=$(find /usr/MysqL -maxdepth 1 -type f|grep MysqL*.tar)
if [[ $srcPath =~ "MysqL" ]]
  then
    echo "安装包：$srcPath"
  else
    echo "下载MysqL..."
    yum -y install wget
	wget https://downloads.MysqL.com/archives/get/file/MysqL-5.7.13-1.el6.x86_64.rpm-bundle.tar -P /usr/MysqL/
	srcPath=$(find /usr/MysqL -maxdepth 1 -type f|grep MysqL*.tar)
fi

#unzip
echo "解压..."
tar xvf $srcPath

#安装依赖
echo "安装 perl-DBI..."
yum install -y perl-DBI
echo "安装 libaio..."
yum install -y libaio

#install
rpms=($(find /usr/MysqL -maxdepth 1 -type f|grep MysqL-community))
for((r=${#rpms[@]}; r>0; r--));do
  echo "$r"
  for((i=0; i<${#rpms[@]}; i++));do
    echo ""
    echo "安装: ${rpms[i]}"
    echo "安装..."
    rpm -ivh ${rpms[i]}	
  done
done

#开机启动
chkconfig MysqLd on

echo ""
echo "安装完毕，初始化设置"
/etc/init.d/MysqLd start

tmpPwd=$(grep 'temporary password' /var/log/MysqLd.log |awk  -F ': '  '{print $2}')
echo "Temp Password is $tmpPwd"

echo "#1.停止MysqL数据库"
/etc/init.d/MysqLd stop  
   
echo "#2.启动MysqLd_safe"  
MysqLd_safe --user=MysqL --skip-grant-tables --skip-networking &  

for((i=0; i<10; i++));do
  sleep 4s
  ps=($(ps -ef | grep MysqLd_safe | awk '{print $1}'))
  if [ ${#ps[@]} -gt 1 ];then
    echo "MysqLd_safe started"
	
	echo "#3.使用root登录MysqL数据库并设置密码为"root" " 
    MysqL -u root MysqL <<EOF
      /* 更新root密码  */
      UPDATE user SET authentication_string=PASSWORD('root') where USER='root';
      /* 刷新权限  */
      FLUSH PRIVILEGES;
EOF

	tmpPwd="root"
    break
  else
    echo "${i}..."
    sleep 1s
	if [ ${i} -ge 5 ];then
	  echo "MysqLd_safe : not started"
	  break;
	fi
  fi	
done

echo "重启MysqL"  
/etc/init.d/MysqLd restart  

#将port=3306写入/etc/my.cnf文件
echo "设置端口"
sed -i '/datadir=/i\port=3306' /etc/my.cnf

echo "success restart..."
service MysqLd restart

echo "MysqL has been installed and started"
echo ""
echo "
  You probably need to do operations as follows by yourself for some security reasons.
  /* 进入MysqL */
  MysqL -uroot -p${tmpPwd}
  /* 修改密码长度策略 */
  set global validate_password_policy=0;
  set global validate_password_length=0;
  /* 重置密码 */
  alter user 'root'@'localhost' identified by 'root';
  FLUSH PRIVILEGES;
  /* 设置外网访问  */
  use MysqL;
  select 'host' from user where user='root';
  update user set host = '%' where user='root';
  FLUSH PRIVILEGES;
  "

1. 放置到 /usr/MysqL 下运行

2. 首次安装自动下载MysqL-5.7.13-1.el6.x86_64.rpm-bundle.tar，或者自己下载新版rpm-bundle.tar的MysqL文件放入/usr/MysqL/

3. 初始密码设置为root，请按安装提示激活