1.使用命令将qcow2 文件扩容
# 文件之前已经设置了50G,现在增加50G
qemu-img resize /data/img/rds1.qcow2 +50G
# 查看文件信息,执行此命令需要虚拟机关机
qemu-img info /data/img/rds1.qcow2
root@yuuri-MS-7C94:/data/img# qemu-img info /data/img/rds1.qcow2
image: /data/img/rds1.qcow2
file format: qcow2
virtual size: 100 GiB (107374182400 bytes)
disk size: 37.3 GiB
cluster_size: 65536
Snapshot list:
ID TAG VM SIZE DATE VM CLOCK
1 1651040447 3.27 GiB 2022-04-27 14:20:47 00:08:53.146
Format specific information:
compat: 1.1
lazy refcounts: true
refcount bits: 16
corrupt: false2.添加完成后进入虚拟机
virsh console rds1
# 进入虚拟机后查看空间已经增加,但是无法使用
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
vda 252:0 0 100G 0 disk
├─vda1 252:1 0 1G 0 part /boot
└─vda2 252:2 0 49G 0 part
├─centos-root 253:0 0 45.1G 0 lvm /
└─centos-swap 253:1 0 3.9G 0 lvm [SWAP]3.将未分配的空间进行初始格式化
[root@localhost ~]# fpdisk /dev/vda
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):
# 下一步选择n ,添加一个新的分区
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 (104857600-209715199, default 104857600):
Using default value 104857600
Last sector, +sectors or +size{K,M,G} (104857600-209715199, default 209715199):
Using default value 209715199
Partition 3 of type Linux and of size 50 GiB is set
# 打印分区信息,并将分区修改为lvm 格式
Command (m for help): p
Disk /dev/vda: 107.4 GB, 107374182400 bytes, 209715200 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 label type: dos
Disk identifier: 0x00089f98
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 2099199 1048576 83 Linux
/dev/vda2 2099200 104857599 51379200 8e Linux LVM
/dev/vda3 104857600 209715199 52428800 83 Linux
Command (m for help): t
Partition number (1-3, default 3):
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
# 最后一步,输入w 退出并保存结果
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
g create a new empty GPT partition table
G create an IRIX (SGI) partition table
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)
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.4.使用lvm 进行扩容
# 首先执行partprobe
[root@localhost ~]# partprobe
# 执行lsblk 分区信息,已经增加
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
vda 252:0 0 100G 0 disk
├─vda1 252:1 0 1G 0 part /boot
├─vda2 252:2 0 49G 0 part
│ ├─centos-root 253:0 0 45.1G 0 lvm /
│ └─centos-swap 253:1 0 3.9G 0 lvm [SWAP]
└─vda3 252:3 0 50G 0 part
# 添加pv
[root@localhost ~]# pvcreate /dev/vda3
Physical volume "/dev/vda3" successfully created.
# 查看pv
[root@localhost ~]# pvs
PV VG Fmt Attr PSize PFree
/dev/vda2 centos lvm2 a-- <49.00g 4.00m
/dev/vda3 lvm2 --- 50.00g 50.00g
# 查看vg
[root@localhost ~]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 1 2 0 wz--n- <49.00g 4.00m
# 将已存在的vg 扩容
[root@localhost ~]# vgextenld centos /dev/vda3
Volume group "centos" successfully extended
[root@localhost ~]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 2 2 0 wz--n- 98.99g 50.00g
# 扩容lv
[root@localhost ~]# lvextend -l +100%FREE /dev/mapper/centos-root
Size of logical volume centos/root changed from <45.12 GiB (11550 extents) to <95.12 GiB (24350 extents).l
Logical volume centos/root successfully resized.
[root@localhost ~]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root centos -wi-ao---- <95.12g
swap centos -wi-ao---- <3.88g
# lsblk 查看已经挂载
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
vda 252:0 0 100G 0 disk
├─vda1 252:1 0 1G 0 part /boot
├─vda2 252:2 0 49G 0 part
│ ├─centos-root 253:0 0 95.1G 0 lvm /
│ └─centos-swap 253:1 0 3.9G 0 lvm [SWAP]
└─vda3 252:3 0 50G 0 part
└─centos-root 253:0 0 95.1G 0 lvm /
# df 查看还未更新
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 9.5M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 46G 32G 14G 70% /
/dev/vda1 1014M 150M 865M 15% /boot
# 使用命令xfs_growfs 更新
[root@localhost ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=2956800 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=11827200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=5775, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 11827200 to 24934400
# 执行完成后 成功更新
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 1.9G 0 1.9G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 9.5M 1.9G 1% /run
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 96G 32G 64G 34% /
/dev/vda1 1014M 150M 865M 15% /boot