GuoLi
8/20/2017 - 4:32 AM
使用LVM添加新磁盘并扩展到根目录
使用LVM添加新磁盘并扩展到根目录
使用LVM添加新磁盘
查找新增磁盘文件
sudo fdisk -l
Disk /dev/sdb: 20 GiB, 21474836480 bytes, 41943040 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
对新磁盘进行分区
sudo fdisk /dev/sdb
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-41943039, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-41943039, default 41943039):
Created a new partition 1 of type 'Linux' and of size 20 GiB.
修改分区类型为LVM
Command (m for help): t
Selected partition 1
Partition type (type L to list all types): 8e
Changed type of partition 'Linux' to 'Linux LVM'.
格式化分区
sudo mkfs.ext4 /dev/sdb1
创建PV
sudo pvcreate /dev/sdb1
查看新创建的PV
sudo pvdisplay
--- Physical volume ---
PV Name /dev/sda5
VG Name lvs-ds-vg
PV Size 9.52 GiB / not usable 2.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 2437
Free PE 6
Allocated PE 2431
PV UUID tgeCdP-SpxQ-Q9YE-5ps1-RKdT-87Ym-33vdis
"/dev/sdb1" is a new physical volume of "20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb1
VG Name
PV Size 20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 0A4o3n-J1Mt-QVaS-0bgI-0Hku-4zsq-Avlc3I
查看现有卷组
sudo vgdisplay
--- Volume group ---
VG Name lvs-ds-vg
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 9.52 GiB
PE Size 4.00 MiB
Total PE 2437
Alloc PE / Size 2431 / 9.50 GiB
Free PE / Size 6 / 24.00 MiB
VG UUID 42bLhu-BeVB-8thU-2OJ4-bqzl-LvPC-xtftwJ
将新创建的PV加入现有的卷组
sudo vgextend lvs-ds-vg /dev/sdb1
再次查看卷组
sudo vgdisplay
--- Volume group ---
VG Name lvs-ds-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 29.52 GiB
PE Size 4.00 MiB
Total PE 7556
Alloc PE / Size 2431 / 9.50 GiB
Free PE / Size 5125 / 20.02 GiB
VG UUID 42bLhu-BeVB-8thU-2OJ4-bqzl-LvPC-xtftwJ
查看逻辑卷
sudo lvdisplay
--- Logical volume ---
LV Path /dev/lvs-ds-vg/root
LV Name root
VG Name lvs-ds-vg
LV UUID onkHdt-4s7X-5q3v-jGpf-uuFk-hxqj-QxkGOk
LV Write Access read/write
LV Creation host, time lvs-ds, 2017-06-15 22:10:31 +0800
LV Status available
# open 1
LV Size 8.50 GiB
Current LE 2176
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
--- Logical volume ---
LV Path /dev/lvs-ds-vg/swap_1
LV Name swap_1
VG Name lvs-ds-vg
LV UUID GG6tFZ-fCH0-X1NI-c4Ln-sqba-DvyL-UqOvNO
LV Write Access read/write
LV Creation host, time lvs-ds, 2017-06-15 22:10:31 +0800
LV Status available
# open 2
LV Size 1020.00 MiB
Current LE 255
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
扩展根目录所在逻辑卷
sudo lvextend -l +100%FREE /dev/lvs-ds-vg/root
Size of logical volume lvs-ds-vg/root changed from 8.50 GiB (2176 extents) to 28.52 GiB (7301 extents).
Logical volume root successfully resized.
在线调整根文件系统大小
sudo resize2fs /dev/lvs-ds-vg/root
resize2fs 1.42.13 (17-May-2015)
Filesystem at /dev/lvs-ds-vg/root is mounted on /; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 2
The filesystem on /dev/lvs-ds-vg/root is now 7476224 (4k) blocks long.
检查根文件系统容量已经增加
df -lh
Filesystem Size Used Avail Use% Mounted on
udev 225M 0 225M 0% /dev
tmpfs 49M 2.0M 47M 4% /run
/dev/mapper/lvs--ds--vg-root 28G 6.2G 21G 23% /
tmpfs 245M 0 245M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 245M 0 245M 0% /sys/fs/cgroup
/dev/sda1 472M 57M 391M 13% /boot
tmpfs 49M 0 49M 0% /run/user/1001