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#!/bin/bash
#auther chentongsan,time 2019-05-30#Description: 适用于系统根分区扩容,第一次、第二次、第三次……..适合用于centos 6、centos 7版本#扫描总线,识别新增添加的磁盘。echo "- - -" > /sys/class/scsi_host/host0/scanecho "- - -" > /sys/class/scsi_host/host1/scanecho "- - -" > /sys/class/scsi_host/host2/scan#检测新加磁盘的盘符、扩展VG及磁盘大小DIVISOR=1073741824DISK_NAME=fdisk -l | grep "Disk /dev/sd" | awk -F '[ :]+' '{print $2}'
for disk in ${DISK_NAME[*]};dodf_disk=df -h | grep $disk | wc -l
if [[ $df_disk -eq 0 ]];thenpvs_disk=pvs | grep $disk | wc -l
if [[ $pvs_disk -eq 0 ]];thennew_disk_size=fdisk -l | grep "$disk" | awk -F '[ ,:]+' '{print $5}'
new_disk_size_G=$(($new_disk_size/$DIVISOR))echo "检测到新磁盘:$disk 容量为:${new_disk_size_G}G"echo "开始创建PV、扩展VG"#创建PV、扩展VGpvcreate $diskVG_NAME=lvdisplay | grep "VG Name" | awk '{print $3}'
LV_PATH=lvdisplay | grep "LV Path" | awk '{print $3}'
vgextend $VG_NAME $disklvresize -l +100%FREE $LV_PATHresize2fs $LV_PATHecho "$LV_PATH / ext4 defaults 0 0" >> /etc/fstabfifidoneecho "根分区扩容完成,请检查确认!" 转载于:https://blog.51cto.com/chentongsan/2402725