debian 磁盘扩容

root@debian:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 100G 0 disk
|-sda1 8:1 0 512M 0 part /boot/efi
|-sda2 8:2 0 488M 0 part /boot
`-sda3 8:3 0 29G 0 part
|-debian--vg-root 254:0 0 28.1G 0 lvm /
`-debian--vg-swap_1 254:1 0 980M 0 lvm [SWAP]
先扩展sda3
需要growpart命令, 没有请安装

sudo apt install cloud-guest-utils

root@debian:~# growpart /dev/sda 3
CHANGED: partition=3 start=2050048 old: size=60862464 end=62912511 new: size=207665119 end=209715166
root@debian:~#
root@debian:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 100G 0 disk
|-sda1 8:1 0 512M 0 part /boot/efi
|-sda2 8:2 0 488M 0 part /boot
`-sda3 8:3 0 99G 0 part
|-debian--vg-root 254:0 0 28.1G 0 lvm /
`-debian--vg-swap_1 254:1 0 980M 0 lvm [SWAP]
使用命令后 sda3 已到99G
使用vgdisplay 查看 free 还可以分配70G
root@debian:~# vgdisplay
--- Volume group ---
VG Name debian-vg
System ID
Format lvm2
Metadata Areas 1
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 1
Act PV 1
VG Size <99.02 GiB
PE Size 4.00 MiB
Total PE 25349
Alloc PE / Size 7429 / <29.02 GiB
Free PE / Size 17920 / 70.00 GiB
VG UUID vrIbdm-Usdo-OaeA-QIiN-2cGJ-7PH6-1H4gqs
扩展/dev/debian-vg/root 这次添加66.9G

lvextend -L+66.9G /dev/debian-vg/root
resize2fs /dev/debian-vg/root

root@debian:~# vgdisplay
--- Volume group ---
VG Name debian-vg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 6
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size <99.02 GiB
PE Size 4.00 MiB
Total PE 25349
Alloc PE / Size 24556 / 95.92 GiB
Free PE / Size 793 / <3.10 GiB
VG UUID vrIbdm-Usdo-OaeA-QIiN-2cGJ-7PH6-1H4gqs

root@debian:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sda 8:0 0 100G 0 disk
|-sda1 8:1 0 512M 0 part /boot/efi
|-sda2 8:2 0 488M 0 part /boot
`-sda3 8:3 0 99G 0 part
|-debian--vg-root 254:0 0 95G 0 lvm /
`-debian--vg-swap_1 254:1 0 980M 0 lvm [SWAP]
使用命令查看已成功