1.关闭虚拟机，调整磁盘容量大小。

image.png

2.开启虚拟机，查看磁盘分区信息。

root@graylog-preview:~# fdisk -l

Disk /dev/sda: 150 GiB, 161061273600 bytes, 314572800 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

Disklabel type: dos

Disk identifier: 0x1a970210

Device Boot Start End Sectors Size Id Type

/dev/sda1 * 2048 40957951 40955904 19.5G 8e Linux LVM

/dev/sda2 40957952 104857599 63899648 30.5G 83 Linux

Disk /dev/mapper/graylog--preview--vg-root: 49 GiB, 52655292416 bytes, 102842368 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 /dev/mapper/graylog--preview--vg-swap_1: 980 MiB, 1027604480 bytes, 2007040 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

root@graylog-preview:~# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

fd0 2:0 1 4K 0 disk

sda 8:0 0 150G 0 disk

├─sda1 8:1 0 19.5G 0 part

│ ├─graylog--preview--vg-root 253:0 0 49G 0 lvm /

│ └─graylog--preview--vg-swap_1 253:1 0 980M 0 lvm [SWAP]

└─sda2 8:2 0 30.5G 0 part

└─graylog--preview--vg-root 253:0 0 49G 0 lvm /

3.创建新分区

root@graylog-preview:~# fdisk /dev/sda

Welcome to fdisk (util-linux 2.31.1).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Command (m for help): m

Help:

DOS (MBR)

a toggle a bootable flag

b edit nested BSD disklabel

c toggle the dos compatibility flag

Generic

d delete a partition

F list free unpartitioned space

l list known partition types

n add a new partition

p print the partition table

t change a partition type

v verify the partition table

i print information about a partition

Misc

m print this menu

u change display/entry units

x extra functionality (experts only)

Script

I load disk layout from sfdisk script file

O dump disk layout to sfdisk script file

Save & Exit

w write table to disk and exit

q quit without saving changes

Create a new label

g create a new empty GPT partition table

G create a new empty SGI (IRIX) partition table

o create a new empty DOS partition table

s create a new empty Sun partition table

Command (m for help): n

Partition type

p primary (2 primary, 0 extended, 2 free)

e extended (container for logical partitions)

Select (default p): p

Partition number (3,4, default 3):

First sector (104857600-314572799, default 104857600):

Last sector, +sectors or +size{K,M,G,T,P} (104857600-314572799, default 314572799):

Created a new partition 3 of type 'Linux' and of size 100 GiB.

Command (m for help): w

The partition table has been altered.

Syncing disks.

4.重新读取分区

root@graylog-preview:~# partprobe /dev/sda

5.创建物理卷

root@graylog-preview:~# pvcreate /dev/sda3

Physical volume "/dev/sda3" successfully created.

6.查看卷组名称，以及卷组使用情况

root@graylog-preview:~# vgdisplay

--- Volume group ---

VG Name graylog-preview-vg

System ID

Format lvm2

Metadata Areas 2

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 2

Act PV 2

VG Size <50.00 GiB

PE Size 4.00 MiB

Total PE 12799

Alloc PE / Size 12799 / <50.00 GiB

Free PE / Size 0 / 0

VG UUID DyyKU1-gQ4j-Udo6-mPC8-Ogh1-fwRD-XJ9w4b

7.将物理卷扩展到卷组

root@graylog-preview:~# vgextend graylog-preview-vg /dev/sda3

Volume group "graylog-preview-vg" successfully extended

8.查看当前逻辑卷的空间状态

root@graylog-preview:~# lvdisplay

--- Logical volume ---

LV Path /dev/graylog-preview-vg/root

LV Name root

VG Name graylog-preview-vg

LV UUID VIavCO-3GyX-YO3E-WEu9-wyqp-B5Ko-Mv2GYp

LV Write Access read/write

LV Creation host, time graylog-preview, 2020-11-05 19:44:54 +0000

LV Status available

# open 1

LV Size <49.04 GiB

Current LE 12554

Segments 2

Allocation inherit

Read ahead sectors auto

- currently set to 256

Block device 253:0

--- Logical volume ---

LV Path /dev/graylog-preview-vg/swap_1

LV Name swap_1

VG Name graylog-preview-vg

LV UUID 7PBtOy-6qBY-vok1-9fHB-YfCy-hrDs-VVDzSU

LV Write Access read/write

LV Creation host, time graylog-preview, 2020-11-05 19:44:54 +0000

LV Status available

# open 2

LV Size 980.00 MiB

Current LE 245

Segments 1

Allocation inherit

Read ahead sectors auto

- currently set to 256

Block device 253:1

9.将卷组中的空闲空间扩展到根分区逻辑卷

root@graylog-preview:~# lvextend -l +100%FREE /dev/graylog-preview-vg/root

Size of logical volume graylog-preview-vg/root changed from <49.04 GiB (12554 extents) to <149.04 GiB (38153 extents).

Logical volume graylog-preview-vg/root successfully resized.

10.执行

root@graylog-preview:~# resize2fs /dev/graylog-preview-vg/root

resize2fs 1.44.1 (24-Mar-2018)

Filesystem at /dev/graylog-preview-vg/root is mounted on /; on-line resizing required

old_desc_blocks = 7, new_desc_blocks = 19

The filesystem on /dev/graylog-preview-vg/root is now 39068672 (4k) blocks long.

11.查看扩展之后磁盘使用情况

root@graylog-preview:~# df -h

Filesystem Size Used Avail Use% Mounted on

udev 2.0G 0 2.0G 0% /dev

tmpfs 395M 756K 394M 1% /run

/dev/mapper/graylog--preview--vg-root 147G 3.7G 137G 3% /

tmpfs 2.0G 0 2.0G 0% /dev/shm

tmpfs 5.0M 0 5.0M 0% /run/lock

tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup

tmpfs 395M 0 395M 0% /run/user/1000

root@graylog-preview:~# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

fd0 2:0 1 4K 0 disk

sda 8:0 0 150G 0 disk

├─sda1 8:1 0 19.5G 0 part

│ ├─graylog--preview--vg-root 253:0 0 149G 0 lvm /

│ └─graylog--preview--vg-swap_1 253:1 0 980M 0 lvm [SWAP]

├─sda2 8:2 0 30.5G 0 part

│ └─graylog--preview--vg-root 253:0 0 149G 0 lvm /

└─sda3 8:3 0 100G 0 part

└─graylog--preview--vg-root 253:0 0 149G 0 lvm /