改变磁盘大小之后需要重启才能生效。
[root@k8s-nfs ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
fd0 2:0 1 4K 0 disk
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 88G 0 lvm /
├─centos-swap 253:1 0 1016M 0 lvm
└─centos-home 253:2 0 10G 0 lvm /home
sr0 11:0 1 1024M 0 rom
[root@k8s-nfs ~]#
[root@k8s-nfs ~]#
[root@k8s-nfs ~]#
[root@k8s-nfs ~]# fdisk /dev/sda
欢迎使用 fdisk (util-linux 2.23.2)。
更改将停留在内存中，直到您决定将更改写入磁盘。
使用写入命令前请三思。
命令(输入 m 获取帮助)：n
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p):
Using default response p
分区号 (3,4，默认 3)：
起始 扇区 (209715200-419430399，默认为 209715200)：
将使用默认值 209715200
Last 扇区, +扇区 or +size{K,M,G} (209715200-419430399，默认为 419430399)：+100G
值超出范围。
Last 扇区, +扇区 or +size{K,M,G} (209715200-419430399，默认为 419430399)：+99G
分区 3 已设置为 Linux 类型，大小设为 99 GiB
命令(输入 m 获取帮助)：w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.
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)
正在同步磁盘。
[root@k8s-nfs ~]# partprobe
[root@k8s-nfs ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
fd0 2:0 1 4K 0 disk
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 88G 0 lvm /
│ ├─centos-swap 253:1 0 1016M 0 lvm
│ └─centos-home 253:2 0 10G 0 lvm /home
└─sda3 8:3 0 99G 0 part
sr0 11:0 1 1024M 0 rom
[root@k8s-nfs ~]# lvm
lvm> pvcreate /dev/sda3
Physical volume "/dev/sda3" successfully created.
lvm> 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 efjCC5-9SmV-uA13-o0vW-uumQ-HuE2-VvvsEw
"/dev/sda3" is a new physical volume of "99.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sda3
VG Name
PV Size 99.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID yyfutw-19wS-Jegf-SX8Q-IAY0-4fZQ-R1qsHW
lvm> 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 2
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 sv7bTd-obHA-xJwy-YvzC-f0NV-v8xG-rwmfiK
lvm> vgextend centos /dev/sda3
Volume group "centos" successfully extended
lvm> vgdisplay
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 197.99 GiB
PE Size 4.00 MiB
Total PE 50686
Alloc PE / Size 25342 / 98.99 GiB
Free PE / Size 25344 / 99.00 GiB
VG UUID sv7bTd-obHA-xJwy-YvzC-f0NV-v8xG-rwmfiK
lvm> lvextend -l +100%FREE /dev/centos/root
Size of logical volume centos/root changed from 88.00 GiB (22528 extents) to 187.00 GiB (47872 extents).
Logical volume centos/root successfully resized.
lvm> ^C
[root@k8s-nfs ~]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=5767168 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=23068672, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=11264, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 23068672 to 49020928
[root@k8s-nfs ~]# df -h
文件系统 容量 已用 可用 已用% 挂载点
devtmpfs 7.9G 0 7.9G 0% /dev
tmpfs 7.9G 0 7.9G 0% /dev/shm
tmpfs 7.9G 8.9M 7.9G 1% /run
tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup
/dev/mapper/centos-root 187G 2.6G 185G 2% /
/dev/sda1 1014M 137M 878M 14% /boot
/dev/mapper/centos-home 10G 33M 10G 1% /home
tmpfs 1.6G 0 1.6G 0% /run/user/0
[root@k8s-nfs ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
fd0 2:0 1 4K 0 disk
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 187G 0 lvm /
│ ├─centos-swap 253:1 0 1016M 0 lvm
│ └─centos-home 253:2 0 10G 0 lvm /home
└─sda3 8:3 0 99G 0 part
└─centos-root 253:0 0 187G 0 lvm /
sr0 11:0 1 1024M 0 rom
[root@k8s-nfs ~]#
