一、 修改虚拟机磁盘大小
先把虚拟机停掉。再增加磁盘大小。
路径中有空格的用""包起来。
bash
D:\Program Files\Oracle\VirtualBox>VBoxManage.exe modifyhd "D:\Program Files\VirtualBox VMs\mycentos\mycentos.vdi" --resize 30000
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%查看虚拟机的大小
二、启动虚拟机
查看磁盘，看不到新增的磁盘。
查看总磁盘已经扩展到31.5GB
bash
[root@localhost ~]# fdisk -l /dev/sda
Disk /dev/sda: 31.5 GB, 31457280000 bytes, 61440000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0009162b
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 41943039 20458496 8e Linux LVM三、格式化新增的空间
bash
[root@localhost ~]# fdisk /dev/sda
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
g create a new empty GPT partition table
G create an IRIX (SGI) partition table
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): n
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p): p
Partition number (3,4, default 3): 3
First sector (41943040-61439999, default 41943040):
Using default value 41943040
Last sector, +sectors or +size{K,M,G} (41943040-61439999, default 61439999):
Using default value 61439999
Partition 3 of type Linux and of size 9.3 GiB is set
Command (m for help): t
Partition number (1-3, default 3): 3
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to '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 or after you run partprobe(8) or kpartx(8)
Syncing disks.再查看磁盘
bash
[root@localhost ~]# fdisk -l /dev/sda
Disk /dev/sda: 31.5 GB, 31457280000 bytes, 61440000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0009162b
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 41943039 20458496 8e Linux LVM
/dev/sda3 41943040 61439999 9748480 8e Linux LVM
bash
# 重新分区
[root@localhost ~]# partprobe
[root@localhost ~]# mkfs.ext3 /dev/sda3
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
609600 inodes, 2437120 blocks
121856 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2495610880
75 block groups
32768 blocks per group, 32768 fragments per group
8128 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
[root@localhost ~]# lvm
lvm> pvcreate /dev/sda3
WARNING: ext3 signature detected on /dev/sda3 at offset 1080. Wipe it? [y/n]: y
Wiping ext3 signature on /dev/sda3.
Physical volume "/dev/sda3" successfully created.
lvm> vgdisplay
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size <19.51 GiB
PE Size 4.00 MiB
Total PE 4994
Alloc PE / Size 4984 / <19.47 GiB
Free PE / Size 10 / 40.00 MiB
VG UUID dGZuCt-X5L5-WTQD-BSRs-OO3m-GzGy-mIy0y3
lvm> vgextend centos /dev/sda3
Volume group "centos" successfully extended
lvm> lvextend -l +4984 /dev/mapper/centos-root
Insufficient free space: 4984 extents needed, but only 2389 available
lvm> lvextend -l +2389 /dev/mapper/centos-root
Size of logical volume centos/root changed from <17.47 GiB (4472 extents) to 26.80 GiB (6861 extents).
Logical volume centos/root successfully resized.
lvm> quit
Exiting.
[root@localhost ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=1144832 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0 finobt=0 spinodes=0
data = bsize=4096 blocks=4579328, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 4579328 to 7025664
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 8.6M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 27G 14G 14G 51% /
/dev/sda1 497M 164M 334M 33% /boot
tmpfs 379M 0 379M 0% /run/user/0/dev/mapper/centos-root大小已经变成27G