来源：今日头条
作者：运维小阿宇
经常会因为业务的需要扩充/分区，使用下面的方法将新增加的磁盘扩展到/分区下。
扩展磁盘容量
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 200G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 99G 0 part
├─centos-root 253:0 0 50G 0 lvm /
├─centos-swap 253:1 0 3.9G 0 lvm [SWAP]
└─centos-home 253:2 0 45.1G 0 lvm /home
sr0 11:0 1 4.4G 0 rom
磁盘分区
fdisk /dev/sda
[root@localhost ~]# fdisk /dev/sda
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): n
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p): p
Partition number (3,4, default 3): 3
First sector (209715200-419430399, default 209715200):
Using default value 209715200
Last sector, +sectors or +size{K,M,G} (209715200-419430399, default 419430399):
Using default value 419430399
Partition 3 of type Linux and of size 100 GiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
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.
[root@localhost ~]#
可以查看 到 /dev/sda3
LVM逻辑卷扩容
1.创建pv
pvcreate /dev/sda3
[root@localhost ~]# pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created.
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 1 3 0 wz--n- <99.00g 4.00m
[root@localhost ~]#
[root@localhost ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name centos
PV Size <99.00 GiB / not usable 3.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 25343
Free PE 1
Allocated PE 25342
PV UUID iUNVfi-Xcl5-8y1l-d7Vc-88md-zghN-N4eMCO
"/dev/sda3" is a new physical volume of "100.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sda3
VG Name
PV Size 100.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 0RU9uN-daWc-AjwY-65yn-4HJl-Jayp-elokTB
[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 1
Act PV 1
VG Size <99.00 GiB
PE Size 4.00 MiB
Total PE 25343
Alloc PE / Size 25342 / 98.99 GiB
Free PE / Size 1 / 4.00 MiB
VG UUID N97Czd-TZPg-zvmL-UoTg-rz3Y-UXyX-lW8KyV
2.加到卷组
vgextend centos /dev/sda3
[root@localhost ~]# vgextend centos /dev/sda3
Volume group "centos" successfully extended
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 2 3 0 wz--n- 198.99g 100.00g
3.lv扩容
lvdisplay
[root@localhost ~]# lvdisplay
--- Logical volume ---
LV Path /dev/centos/swap
LV Name swap
VG Name centos
LV UUID psDv8G-DCud-1oFh-dejc-AV9D-she3-1CZkaF
LV Write Access read/write
LV Creation host, time localhost, 2022-08-01 09:41:10 +0800
LV Status available
# open 2
LV Size <3.88 GiB
Current LE 992
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:1
--- Logical volume ---
LV Path /dev/centos/home
LV Name home
VG Name centos
LV UUID VJeQaM-DRC9-C8t0-XPle-zv37-hW3U-2QGVYT
LV Write Access read/write
LV Creation host, time localhost, 2022-08-01 09:41:10 +0800
LV Status available
# open 1
LV Size <45.12 GiB
Current LE 11550
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:2
--- Logical volume ---
LV Path /dev/centos/root
LV Name root
VG Name centos
LV UUID jwW2hv-U7sF-heJH-g3l6-TuyV-2zn5-mbPhTC
LV Write Access read/write
LV Creation host, time localhost, 2022-08-01 09:41:10 +0800
LV Status available
# open 1
LV Size 50.00 GiB
Current LE 12800
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:0
lvextend -L +99G /dev/centos/root #扩展/root所在的lv，增加99G
xfs_growfs /dev/centos/root #扩展/root文件系统
[root@localhost ~]# lvextend -L +99G /dev/centos/root
Size of logical volume centos/root changed from 50.00 GiB (12800 extents) to 149.00 GiB (38144 extents).
Logical volume centos/root successfully resized.
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=3276800 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=13107200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=6400, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 13107200 to 39059456
[root@localhost ~]#
原文始发于微信公众号（运维贼船）：CentOS虚拟机硬盘扩容到 / 路径下
版权声明：本文内容由互联网用户自发贡献，该文观点仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 举报，一经查实，本站将立刻删除。
文章由极客之音整理，本文链接：https://www.bmabk.com/index.php/post/176993.html
