磁盘扩容

扩容

#!/bin/bash
#下述下个变量需要根据实际情况进行修改
disk="/dev/sdb"
partition="$disk"1
num=90

echo "n
p
1


t
8e
w
" | fdisk $disk &>/dev/null

#判断分区是否成功
a="`fdisk -l | grep /dev/sdb1 | grep 8e | wc -l`"
if [ $a -ge 1 ]; then
   echo "分区成功，即将扩容;"
   sleep 3
else
   echo "分区失败，即将退出;"
   sleep 3
   exit
fi

#创建物理PV，并进行扩容
#确定VG Name
vgname="`vgdisplay | grep "VG Name" | awk '{print $3}'`"
#定义需要扩容的目录
contents="`df -h | grep /dev/mapper/centos-root | awk '{print $1}'`"

b="`cat /etc/fstab | grep $contents | grep "xfs" | wc -l`"
if [ $b -ge 1 ]; then
   echo "系统格式是xfs，可扩展;"
   sleep 3
else
   echo "系统格式不对，即将退出;"
   sleep 3
   exit
fi

echo "pvcreate $partition
vgextend $vgname $partition
lvextend -L +"$num"G $contents
pvdisplay
quit
" | lvm &>/dev/null

xfs_growfs /dev/mapper/centos-root

echo " "
echo " "

vgdisplay | grep "VG Size"

echo " "
echo " "

df -h