给linux虚拟机硬盘扩容（LVM分区）
2020-12-29 本文已影响0人
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1.关闭虚拟机，调整磁盘容量大小。
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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 /
