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修改虛擬機磁盤大小
修改storage 磁盤大小

啟動虛擬機

修改分區大小
fdisk /dev/xvda

The number of cylinders for this disk is set to 5221.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
?? (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help):?p

Disk /dev/xvda:?42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

??? Device Boot????? Start???????? End????? Blocks?? Id? System
/dev/xvda1?? *?????????? 1????????? 13????? 104391?? 83? Linux
/dev/xvda2????????????? 14??????? 2610???20860402+? 8e? Linux LVM

Command (m for help): Command (m for help):?p
DOS Compatibility flag is not set

Command (m for help):?d
Partition number (1-4):?2

Command (m for help):?n
Command action
?? e?? extended
?? p?? primary partition (1-4)
p
Partition number (1-4):?2
First cylinder (14-5221, default 14):
Using default value 14
Last cylinder or +size or +sizeM or +sizeK (14-5221, default 5221):
Using default value 5221

Command (m for help):?t
Partition number (1-4):?2
Hex code (type L to list codes):?8e
Changed system type of partition 2 to 8e (Linux LVM)

Command (m for help):?p

Disk /dev/xvda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

??? Device Boot????? Start???????? End????? Blocks?? Id? System
/dev/xvda1?? *?????????? 1????????? 13????? 104391?? 83? Linux
/dev/xvda2????????????? 14??????? 5221???41833260?? 8e? Linux LVM

Command (m for help):?w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.

重啟虛擬機：reboot

調整PV大小
pvs
? PV???????? VG???????? Fmt? Attr PSize? PFree
? /dev/xvda2 VolGroup00 lvm2 a-??19.88G??? 0


pvresize -v /dev/xvda2
??? Using physical volume(s) on command line
??? Archiving volume group "VolGroup00" metadata (seqno 3).
??? Resizing physical volume /dev/xvda2 from 636 to 1276 extents.
??? Resizing volume "/dev/xvda2" to 83666136 sectors.
??? Updating physical volume "/dev/xvda2"
??? Creating volume group backup "/etc/lvm/backup/VolGroup00" (seqno 4).
? Physical volume "/dev/xvda2" changed
? 1 physical volume(s) resized / 0 physical volume(s) not resized

pvs
? PV???????? VG???????? Fmt? Attr PSize? PFree
? /dev/xvda2 VolGroup00 lvm2 a-??39.88G?20.00G

調整LV大小
lvs
? LV?????? VG???????? Attr?? LSize? Origin Snap%? Move Log Copy%? Convert
? LogVol00 VolGroup00 -wi-ao?17.84G
? LogVol01 VolGroup00 -wi-ao? 2.03G

lvextend -l +100%FREE /dev/VolGroup00/LogVol00

或者?lvextend -l +100%FREE /dev/cl/root

? Extending logical volume LogVol00 to 37.84 GB
? Logical volume LogVol00 successfully resized

lvs
? LV?????? VG???????? Attr?? LSize? Origin Snap%? Move Log Copy%? Convert
? LogVol00 VolGroup00 -wi-ao?37.84G
? LogVol01 VolGroup00 -wi-ao? 2.03G

調整分區大小
df -h
Filesystem??????????? Size? Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
?????????????????????5.7G? 4.5G? 950M? 83% /
/dev/xvda1???????????? 99M?? 22M?? 73M? 24% /boot
tmpfs???????????????? 2.0G???? 0? 2.0G?? 0% /dev/shm

resize2fs /dev/mapper/VolGroup00-LogVol00

或者??xfs_growfs /dev/mapper/cl-root
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/mapper/VolGroup00-LogVol00 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/mapper/VolGroup00-LogVol00 to 9920512 (4k) blocks.
The filesystem on /dev/mapper/VolGroup00-LogVol00 is now 9920512 blocks long.

df -h
Filesystem??????????? Size? Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
?????????????????????? 37G? 4.5G?? 31G? 13% /
/dev/xvda1???????????? 99M?? 22M?? 73M? 24% /boot
tmpfs???????????????? 2.0G???? 0? 2.0G?? 0% /dev/shm
任務完成

遇到的問題
linux系統為centos7 時， 用 resize2fs 命令出現報錯 resize2fs: Bad magic number in super-block while trying to open
xfs_growfs /dev/root_vg/root 用 xfs_growfs 代替命令 resize2fs

轉載于:https://www.cnblogs.com/weifeng1463/p/8421773.html

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