CentOS6 需要使用gdisk工具，若无可使用yum -y install gdisk命令安装 开始扩容 gdisk /dev/vda p #查看分区 d #删除分区 n #新建分区 p #默认选择主要分区 1 #分区编号 2048 #开始扇区（默认直接回车） xxxxx #结束扇区（默认直接回车） w #保存分区表并退出 Centos7 与Centos6相同，只不过可以直接使用fdisk工具
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| #!/bin/bash
rsnamedir="/root/auto_expansion.sh"
rclocal_cmd="/root/autodisksystem.sh"
rclocal_dir="/etc/rc.d/rc.local"
fstab_dir="/etc/fstab"
Swapdir="/www/swap"
rsname=auto_expansion #shell名称
LOCKfile=/root/.$(basename $0).lock
LOGfile=/root/.$(basename $0).log
devname="/dev/vda"
Echo()
{
case $1 in
success) flag="\033[1;32m"
;;
failure) flag="\033[1;31m"
;;
warning) flag="\033[1;33m"
;;
msg) flag="\033[1;34m"
;;
*) flag="\033[1;34m"
;;
esac
if [[ $LANG =~ [Uu][Tt][Ff] ]]
then
echo -e "${flag}${2}\033[0m"
else
echo -e "${flag}${2}\033[0m" iconv -f utf-8 -t gbk
fi
#写日志
[ "${3}A" == "LogA" ] && Shell_log $2
}
Shell_log(){
LOG_INFO=$1
Echo "msg" "$(date "+%Y-%m-%d") $(date "+%H:%M:%S"):$rsname:$LOG_INFO" >> $LOGfile
}
Shell_lock(){
touch $LOCKfile
}
Shell_unlock(){
rm -f $LOCKfile
}
Exit(){
Shell_unlock
exit
}
Check_OS()
{
if [ -e /etc/redhat-release ]; then
OS=CentOS
[ -n "$(grep ' 7\.' /etc/redhat-release 2> /dev/null)" ] && OS_Ver=7
[ -n "$(grep ' 6\.' /etc/redhat-release 2> /dev/null)" ] && OS_Ver=6
elif [ -n "$(grep -i 'Debian' /etc/issue 2> /dev/null)" ]; then
OS=Debian
elif [ -n "$(grep -i 'Ubuntu' /etc/issue 2> /dev/null)" ]; then
OS=Ubuntu
else
Echo "failure" "不支持此系统" "Log"
Exit
fi
}
CentOS6()
{
which gdisk >/dev/null 2>&1
[ $? -ne 0 ] && yum -y install gdisk
gdisk $1 << EOF
p
d
n
1
2048
w
y
y
EOF
sed -i "/^nohup \/root\/.*/a$rclocal_cmd" $rclocal_dir
}
CentOS7()
{
fdisk $1 << EOF
p
d
n
p
1
2048
w
EOF
sed -i "/^nohup \/root\/.*/a$rclocal_cmd" $rclocal_dir
}
Debian()
{
fdisk $1 << EOF
p
d
n
p
1
2048
w
EOF
rclocal_dir="/etc/rc.local"
sed -i "/^nohup \/root\/.*/a$rclocal_cmd" $rclocal_dir
}
Ubuntu()
{
fdisk $1 << EOF
p
d
n
p
1
2048
w
EOF
rclocal_dir="/etc/rc.local"
sed -i "/^\/root\/.*/a$rclocal_cmd" $rclocal_dir
}
SwapOff()
{
Swapdir=$(cat /etc/fstab grep swapawk '{print $1}')
swapoff $Swapdir
cp ${fstab_dir}{,_bak}
temp="#${Swapdir} swap swap defaults 0 0"
sed -i "s@${Swapdir}.*@$temp@" $fstab_dir
}
Main()
{
Check_OS
Swap=`free -m awk '/Swap:/{print $2}'`
[ "$Swap" -ne '0' ] && Echo "msg" "根分区存在交换分区，正在关闭。" "Log" && SwapOff
Echo "msg" "当前系统是$OS$OS_Ver，开始扩容。" "Log"
$OS$OS_Ver $devname
Echo "msg" "扩容完成，将创建重启后处理脚本$rclocal_cmd。" "Log"
cat > $rclocal_cmd <<EOF
#!/bin/bash
resize2fs -f /dev/vda1
sed -i '/^\/root\/autodisksystem.sh/d' $rclocal_dir
if [ "$Swap" -ne "0" ]; then
sed -i "s@#${Swapdir}.*@${Swapdir} swap swap defaults 0 0@" $fstab_dir
swapon $Swapdir
fi
[ -e /root/autodisksystem.sh ] && rm -f /root/autodisksystem.sh
[ -e /root/auto_expansion.sh ] && rm -f /root/auto_expansion.sh
EOF
chmod +x $rclocal_cmd
Echo "success" "所有准备工作完成，3秒后自动重启并完成扩容大小" "Log"
Shell_unlock
sleep 3
reboot
}
if [ -f "$LOCKfile" ];then
Echo "warning" "核实脚本正在运行中，请勿重复运行，若是之前强行中断引起的，请手工清理$LOCKfile" "Log" && exit
else
Echo "msg" "首次运行脚本，将自动创建锁文件然后继续，避免在执行中重复运行脚本。" "Log"
Shell_lock
fi
Main
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