環境
| 操作系統版本 |
IP |
Virtualbox版本 |
| Centos7 |
172.21.3.20 |
6.1 |
查看磁盤空間大小
root@ubuntu14:/opt# df -h
文件系統 容量 已用 可用 已用% 掛載點
/dev/mapper/ubuntu14--vg-root 28G 23G 3.3G 88% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 3.9G 4.0K 3.9G 1% /dev
tmpfs 799M 384K 799M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 3.9G 0 3.9G 0% /run/shm
none 100M 0 100M 0% /run/user
/dev/vda1 236M 37M 188M 17% /boot
fdisk -l查看磁盤信息
root@ubuntu14:/opt# fdisk -l
Disk /dev/vda: 161.1 GB, 161061273600 bytes
16 heads, 63 sectors/track, 312076 cylinders, total 314572800 sectors
Units = 扇區 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0001a023
設備 啟動 起點 終點 塊數 Id 系統
/dev/vda1 * 2048 499711 248832 83 Linux
/dev/vda2 501758 62912511 31205377 5 擴展
/dev/vda5 501760 62912511 31205376 8e Linux LVM
Disk /dev/mapper/ubuntu14--vg-root: 29.8 GB, 29804724224 bytes
255 heads, 63 sectors/track, 3623 cylinders, total 58212352 sectors
Units = 扇區 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/ubuntu14--vg-root doesn't contain a valid partition table
Disk /dev/mapper/ubuntu14--vg-swap_1: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders, total 4194304 sectors
Units = 扇區 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/ubuntu14--vg-swap_1 doesn't contain a valid partition table
創建新分區
root@ubuntu14:/opt# fdisk /dev/vda
命令(輸入 m 獲取幫助)： m
命令操作
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
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)
命令(輸入 m 獲取幫助)： n #new 新分區
Partition type:
p primary (1 primary, 1 extended, 2 free)
l logical (numbered from 5)
Select (default p): p #選擇主分區
分區號 (1-4，默認為 3)： #分區序號4
起始 sector (499712-314572799，默認為 499712)： #分區開始回車默認
將使用默認值 499712
Last sector, +扇區 or +size{K,M,G} (499712-501757，默認為 501757)：
將使用默認值 501757
命令(輸入 m 獲取幫助)： t #修改分區格式
分區號 (1-5): 4 #修改分區號
Hex code (type L to list codes): 8e #格式選擇8e linux LVM
Changed system type of partition 4 to 8e (Linux LVM
命令(輸入 m 獲取幫助)： p #顯示分區信息
Disk /dev/vda: 161.1 GB, 161061273600 bytes
16 heads, 63 sectors/track, 312076 cylinders, total 314572800 sectors
Units = 扇區 of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0001a023
設備 啟動 起點 終點 塊數 Id 系統
/dev/vda1 * 2048 499711 248832 83 Linux
/dev/vda2 501758 62912511 31205377 5 擴展
/dev/vda3 499712 501757 1023 83 Linux
/dev/vda4 62912512 314572799 125830144 8e Linux LVM
/dev/vda5 501760 62912511 31205376 8e Linux LVM
Partition table entries are not in disk order
命令(輸入 m 獲取幫助)： w #保存信息
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: 設備或資源忙.
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.
重啟操作系統
reboot
創建物理卷
root@ubuntu14:~# pvcreate /dev/vda4
Physical volume "/dev/vda4" successfully created
查看新建的物理卷和大小
root@ubuntu14:~# pvdisplay
--- Physical volume ---
PV Name /dev/vda5
VG Name ubuntu14-vg
PV Size 29.76 GiB / not usable 2.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 7618
Free PE 0
Allocated PE 7618
PV UUID XR32TY-aRQC-IQC6-oCx7-aa9X-KdJe-bHmaBd
"/dev/vda4" is a new physical volume of "120.00 GiB"
--- NEW Physical volume ---
PV Name /dev/vda4
VG Name
PV Size 120.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID MVK0IT-LDgP-eWwZ-fzQM-tdyY-4kRQ-nbk122
添加新的物理卷
root@ubuntu14:~# vgextend ubuntu14-vg /dev/vda4
Volume group “ubuntu14-vg” successfully extended
查看卷組信息
root@ubuntu14:~# vgdisplay
--- Volume group ---
VG Name ubuntu14-vg
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 149.76 GiB
PE Size 4.00 MiB
Total PE 38338
Alloc PE / Size 7618 / 29.76 GiB
Free PE / Size 30720 / 120.00 GiB
VG UUID cq2Z6G-P6j1-S2gM-mibz-d63V-NjkS-dHYe7D
增加ubuntu14-vg大小
#使用 lvresize -L +119.9G /dev/mapper/ubuntu14--vg-root 命令。
root@ubuntu14:~# lvresize -L +119.9G /dev/mapper/ubuntu14--vg-root
Extending logical volume root to 147.76 GiB
Logical volume root successfully resized
重新識別ubuntu14-vg大小
root@ubuntu14:~# resize2fs /dev/mapper/ubuntu14--vg-root
resize2fs 1.42.9 (4-Feb-2014)
Filesystem at /dev/mapper/ubuntu14--vg-root is mounted on /; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 10
The filesystem on /dev/mapper/ubuntu14--vg-root is now 38733824 blocks long.
#不行就換這個命令xfs_growfs/dev/mapper/ubuntu14--vg-root
查看擴容后的大小
root@ubuntu14:~# df -h
文件系統 容量 已用 可用 已用% 掛載點
/dev/mapper/ubuntu14--vg-root 146G 23G 117G 17% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 3.9G 4.0K 3.9G 1% /dev
tmpfs 799M 388K 799M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 3.9G 0 3.9G 0% /run/shm
none 100M 0 100M 0% /run/user
/dev/vda1 236M 37M 188M 17% /boot
