1.首先获取要扩容的虚拟机的 UUID
VBoxManage 改命令在C:Program FilesOracleVirtualBox目录内，可先添加该目录到环境变量。
C:Usersyzkj-1008VirtualBox VMsCentOS65197>VBoxManage list hdds
UUID: 297f254e-ada0-4ddd-be61-552226c3df58 Parent UUID: base State: created Type: normal (base) Location: C:Usersyzkj-1008VirtualBox VMsCentOS65197centos.vdi Storage format: VDI Capacity: 8192 MBytes Encryption: disabled UUID: 840332aa-7efb-4167-b108-cea25b1bded6 Parent UUID: base State: created Type: normal (base) Location: C:Usersyzkj-1008VirtualBox VMsCentOS65198CentOS65198-disk1.vdi Storage format: VDI Capacity: 8192 MBytes Encryption: disabled UUID: 0e4317e3-2dd1-45f5-82e0-83a4469bf4ab Parent UUID: base State: created Type: normal (base) Location: C:Usersyzkj-1008VirtualBox VMsCentOS65199CentOS65199-disk1.vdi Storage format: VDI Capacity: 8192 MBytes Encryption: disabled UUID: 536f5698-b4e0-4d03-bdcc-2450fb802707 Parent UUID: base State: created Type: normal (base) Location: C:Usersyzkj-1008VirtualBox VMsCentOS65197 ewdisk.vdi Storage format: VDI Capacity: 8192 MBytes Encryption: disabled
2.虚拟机磁盘扩容
C:Usersyzkj-1008VirtualBox VMsCentOS65197>VBoxManage modifyhd 297f254e-ada0-4ddd-be61-552226c3df58 --resize 16384
3.调整当前硬盘大小
[root@zendlinux ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_zendlinux-lv_root 6.5G 4.8G 1.5G 77% / tmpfs 499M 0 499M 0% /dev/shm /dev/sda1 477M 51M 401M 12% /boot workspace 22G 6.4G 16G 30% /mnt/www [root@zendlinux ~]# fdisk -l Disk /dev/sda: 17.2 GB, 17179869184 bytes 255 heads, 63 sectors/track, 2088 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000dc501 Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 1045 7875584 8e Linux LVM Disk /dev/mapper/vg_zendlinux-lv_root: 7205 MB, 7205814272 bytes 255 heads, 63 sectors/track, 876 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
把容量从6.5扩容到17.2G 单还不能使用
将空余磁盘创建为 sda4
[root@zendlinux ~]# fdisk /dev/sda WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 4 First cylinder (1045-2088, default 1045): Using default value 1045 Last cylinder, +cylinders or +size{K,M,G} (1045-2088, default 2088): Using default value 2088 Command (m for help): t Partition number (1-4): 3 Partition 3 does not exist yet! Command (m for help): t Partition number (1-4): 4 Hex code (type L to list codes): 8e Changed system type of partition 4 to 8e (Linux LVM) Command (m for help): w The partition table has been altered! Disk /dev/mapper/vg_zendlinux-lv_swap: 855 MB, 855638016 bytes 255 heads, 63 sectors/track, 104 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 [root@zendlinux ~]# fdisk -l /dev/sda Disk /dev/sda: 17.2 GB, 17179869184 bytes 255 heads, 63 sectors/track, 2088 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000dc501 Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 1045 7875584 8e Linux LVM /dev/sda4 1045 2088 8383252 8e Linux LVM
调整 LVM 大小先看看当前 Volume Group：
[root@zendlinux ~]# vgdisplay --- Volume group --- VG Name vg_zendlinux 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 7.51 GiB PE Size 4.00 MiB Total PE 1922 Alloc PE / Size 1922 / 7.51 GiB Free PE / Size 0 / 0 VG UUID Ou41cE-HyIM-IrsE-Ga3W-Tmmn-l5RX-sw58Zz
名称为 vg_zendlinux，可调整大小（resizable），当前大小为7.51 GB。
活动的 LVM 卷有
[root@zendlinux ~]# lvscan ACTIVE '/dev/vg_zendlinux/lv_root' [6.71 GiB] inherit ACTIVE '/dev/vg_zendlinux/lv_swap' [816.00 MiB] inherit
先将分配过来的新磁盘空间创建为一个新的物理卷
[root@zendlinux ~]# pvcreate /dev/sda4 dev_is_mpath: failed to get device for 8:4 Physical volume "/dev/sda4" successfully created
然后使用新的物理卷来扩展 LVM 的vg_zendlinux
[root@zendlinux ~]# vgextend vg_zendlinux /dev/sda4 Volume group "vg_zendlinux" successfully extended
然后扩展 LVM 的逻辑卷 vg_zendlinux/lv_root
[root@zendlinux ~]# lvextend /dev/vg_zendlinux/lv_root /dev/sda4 Extending logical volume lv_root to 14.70 GiB Logical volume lv_root successfully resized
最后，调整逻辑卷文件系统的大小
[root@zendlinux ~]# resize2fs /dev/vg_zendlinux/lv_root resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/vg_zendlinux/lv_root is mounted on /; on-line resizing required old desc_blocks = 1, new_desc_blocks = 1 Performing an on-line resize of /dev/vg_zendlinux/lv_root to 3854336 (4k) blocks. The filesystem on /dev/vg_zendlinux/lv_root is now 3854336 blocks long.
完成。看看效果：
[root@zendlinux ~]# lvscan ACTIVE '/dev/vg_zendlinux/lv_root' [14.70 GiB] inherit ACTIVE '/dev/vg_zendlinux/lv_swap' [816.00 MiB] inherit [root@zendlinux ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_zendlinux-lv_root 15G 4.8G 8.9G 35% / tmpfs 499M 0 499M 0% /dev/shm /dev/sda1 477M 51M 401M 12% /boot workspace 22G 6.4G 16G 30% /mnt/www