记录一次Oracle VirtualBox 下 Centos 6.5 VM 磁盘扩容

Oracle VirtualBox 创建的 Centos 6.5 VM 默认硬盘大小是8个G（未手工调整），现使用100%，需要扩容。

[root@kaola ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_kaola-lv_root 6.5G 6.2G 32M 100% /
tmpfs 939M 76K 939M 1% /dev/shm
/dev/sda1 477M 59M 393M 14% /boot
cm_processes 939M 0 939M 0% /var/run/cloudera-scm-agent/process

复制vmdk到vdi
由于创建VM时选择的磁盘格式是vmdk，先复制磁盘为vdi格式：
C:\Program Files\Oracle\VirtualBox>

vboxmanage clonehd "kaola.vmdk" "new-kaola.vdi" --format vdi

修改磁盘为 20G：
vboxmanage modifyhd "new-kaola.vdi" --resize 20480
查看磁盘信息：

[root@kaola ~]# fdisk -l

Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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: 0x000490ac

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 2611 20458496 8e Linux LVM

下载gparted iso文件，引导vm启动后调整sda2分区；
调整后：

[root@kaola ~]# fdisk -l

Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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: 0x000490ac

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 2611 20458496 8e Linux LVM

查看PV VG信息
[root@kaola mapper]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name vg_kaola
PV Size 19.51 GiB / not usable 2.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 4994
Free PE 3072
Allocated PE 1922
PV UUID TMCfp1-wTiv-efkN-DfJ4-ZHnO-IGa0-iulNOu

[root@kaola mapper]# vgdisplay
--- Volume group ---
VG Name vg_kaola
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 5
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 1922 / 7.51 GiB
Free PE / Size 3072 / 12.00 GiB
VG UUID JGyRf4-drnG-n5gs-M3No-LCBC-MEHz-OcewI1

调整LV大小
Free PE 3072
[root@kaola mapper]# lvextend -l +3072 /dev/mapper/vg_kaola-lv_root
Extending logical volume lv_root to 18.71 GiB
Logical volume lv_root successfully resized

调整文件系统大小
[root@kaola mapper]# resize2fs /dev/mapper/vg_kaola-lv_root
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/vg_kaola-lv_root is mounted on /; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 2
Performing an on-line resize of /dev/mapper/vg_kaola-lv_root to 4904960 (4k) blocks.
The filesystem on /dev/mapper/vg_kaola-lv_root is now 4904960 blocks long.

调整后，现在已用为36%：
[root@kaola mapper]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_kaola-lv_root 19G 6.2G 12G 36% /
tmpfs 939M 224K 939M 1% /dev/shm
/dev/sda1 477M 59M 393M 14% /boot
cm_processes 939M 0 939M 0% /var/run/cloudera-scm-agent/process